Annotation of embedaddon/rsync/io.c, revision 1.1.1.2
1.1 misho 1: /*
2: * Socket and pipe I/O utilities used in rsync.
3: *
4: * Copyright (C) 1996-2001 Andrew Tridgell
5: * Copyright (C) 1996 Paul Mackerras
6: * Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org>
1.1.1.2 ! misho 7: * Copyright (C) 2003-2013 Wayne Davison
1.1 misho 8: *
9: * This program is free software; you can redistribute it and/or modify
10: * it under the terms of the GNU General Public License as published by
11: * the Free Software Foundation; either version 3 of the License, or
12: * (at your option) any later version.
13: *
14: * This program is distributed in the hope that it will be useful,
15: * but WITHOUT ANY WARRANTY; without even the implied warranty of
16: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17: * GNU General Public License for more details.
18: *
19: * You should have received a copy of the GNU General Public License along
20: * with this program; if not, visit the http://fsf.org website.
21: */
22:
23: /* Rsync provides its own multiplexing system, which is used to send
24: * stderr and stdout over a single socket.
25: *
26: * For historical reasons this is off during the start of the
27: * connection, but it's switched on quite early using
28: * io_start_multiplex_out() and io_start_multiplex_in(). */
29:
30: #include "rsync.h"
31: #include "ifuncs.h"
1.1.1.2 ! misho 32: #include "inums.h"
1.1 misho 33:
34: /** If no timeout is specified then use a 60 second select timeout */
35: #define SELECT_TIMEOUT 60
36:
37: extern int bwlimit;
38: extern size_t bwlimit_writemax;
39: extern int io_timeout;
40: extern int am_server;
41: extern int am_sender;
1.1.1.2 ! misho 42: extern int am_receiver;
1.1 misho 43: extern int am_generator;
1.1.1.2 ! misho 44: extern int msgs2stderr;
1.1 misho 45: extern int inc_recurse;
46: extern int io_error;
47: extern int eol_nulls;
48: extern int flist_eof;
1.1.1.2 ! misho 49: extern int file_total;
! 50: extern int file_old_total;
1.1 misho 51: extern int list_only;
52: extern int read_batch;
53: extern int compat_flags;
54: extern int protect_args;
55: extern int checksum_seed;
56: extern int protocol_version;
57: extern int remove_source_files;
58: extern int preserve_hard_links;
1.1.1.2 ! misho 59: extern BOOL extra_flist_sending_enabled;
! 60: extern BOOL flush_ok_after_signal;
1.1 misho 61: extern struct stats stats;
62: extern struct file_list *cur_flist;
63: #ifdef ICONV_OPTION
64: extern int filesfrom_convert;
65: extern iconv_t ic_send, ic_recv;
66: #endif
67:
68: int csum_length = SHORT_SUM_LENGTH; /* initial value */
69: int allowed_lull = 0;
70: int batch_fd = -1;
71: int msgdone_cnt = 0;
1.1.1.2 ! misho 72: int forward_flist_data = 0;
! 73: BOOL flist_receiving_enabled = False;
1.1 misho 74:
75: /* Ignore an EOF error if non-zero. See whine_about_eof(). */
76: int kluge_around_eof = 0;
1.1.1.2 ! misho 77: int got_kill_signal = -1; /* is set to 0 only after multiplexed I/O starts */
1.1 misho 78:
79: int sock_f_in = -1;
80: int sock_f_out = -1;
81:
1.1.1.2 ! misho 82: int64 total_data_read = 0;
! 83: int64 total_data_written = 0;
1.1 misho 84:
1.1.1.2 ! misho 85: static struct {
! 86: xbuf in, out, msg;
! 87: int in_fd;
! 88: int out_fd; /* Both "out" and "msg" go to this fd. */
! 89: int in_multiplexed;
! 90: unsigned out_empty_len;
! 91: size_t raw_data_header_pos; /* in the out xbuf */
! 92: size_t raw_flushing_ends_before; /* in the out xbuf */
! 93: size_t raw_input_ends_before; /* in the in xbuf */
! 94: } iobuf = { .in_fd = -1, .out_fd = -1 };
1.1 misho 95:
96: static time_t last_io_in;
97: static time_t last_io_out;
98:
99: static int write_batch_monitor_in = -1;
100: static int write_batch_monitor_out = -1;
101:
1.1.1.2 ! misho 102: static int ff_forward_fd = -1;
! 103: static int ff_reenable_multiplex = -1;
! 104: static char ff_lastchar = '\0';
! 105: static xbuf ff_xb = EMPTY_XBUF;
1.1 misho 106: #ifdef ICONV_OPTION
107: static xbuf iconv_buf = EMPTY_XBUF;
108: #endif
109: static int select_timeout = SELECT_TIMEOUT;
110: static int active_filecnt = 0;
111: static OFF_T active_bytecnt = 0;
112: static int first_message = 1;
113:
114: static char int_byte_extra[64] = {
115: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* (00 - 3F)/4 */
116: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* (40 - 7F)/4 */
117: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* (80 - BF)/4 */
118: 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 5, 6, /* (C0 - FF)/4 */
119: };
120:
1.1.1.2 ! misho 121: /* Our I/O buffers are sized with no bits on in the lowest byte of the "size"
! 122: * (indeed, our rounding of sizes in 1024-byte units assures more than this).
! 123: * This allows the code that is storing bytes near the physical end of a
! 124: * circular buffer to temporarily reduce the buffer's size (in order to make
! 125: * some storing idioms easier), while also making it simple to restore the
! 126: * buffer's actual size when the buffer's "pos" wraps around to the start (we
! 127: * just round the buffer's size up again). */
! 128:
! 129: #define IOBUF_WAS_REDUCED(siz) ((siz) & 0xFF)
! 130: #define IOBUF_RESTORE_SIZE(siz) (((siz) | 0xFF) + 1)
! 131:
! 132: #define IN_MULTIPLEXED (iobuf.in_multiplexed != 0)
! 133: #define IN_MULTIPLEXED_AND_READY (iobuf.in_multiplexed > 0)
! 134: #define OUT_MULTIPLEXED (iobuf.out_empty_len != 0)
! 135:
! 136: #define PIO_NEED_INPUT (1<<0) /* The *_NEED_* flags are mutually exclusive. */
! 137: #define PIO_NEED_OUTROOM (1<<1)
! 138: #define PIO_NEED_MSGROOM (1<<2)
! 139:
! 140: #define PIO_CONSUME_INPUT (1<<4) /* Must becombined with PIO_NEED_INPUT. */
! 141:
! 142: #define PIO_INPUT_AND_CONSUME (PIO_NEED_INPUT | PIO_CONSUME_INPUT)
! 143: #define PIO_NEED_FLAGS (PIO_NEED_INPUT | PIO_NEED_OUTROOM | PIO_NEED_MSGROOM)
! 144:
1.1 misho 145: #define REMOTE_OPTION_ERROR "rsync: on remote machine: -"
146: #define REMOTE_OPTION_ERROR2 ": unknown option"
147:
1.1.1.2 ! misho 148: #define FILESFROM_BUFLEN 2048
! 149:
1.1 misho 150: enum festatus { FES_SUCCESS, FES_REDO, FES_NO_SEND };
151:
1.1.1.2 ! misho 152: static flist_ndx_list redo_list, hlink_list;
! 153:
! 154: static void read_a_msg(void);
! 155: static void drain_multiplex_messages(void);
! 156: static void sleep_for_bwlimit(int bytes_written);
! 157:
! 158: static void check_timeout(BOOL allow_keepalive)
! 159: {
! 160: time_t t, chk;
! 161:
! 162: /* On the receiving side, the generator is now the one that decides
! 163: * when a timeout has occurred. When it is sifting through a lot of
! 164: * files looking for work, it will be sending keep-alive messages to
! 165: * the sender, and even though the receiver won't be sending/receiving
! 166: * anything (not even keep-alive messages), the successful writes to
! 167: * the sender will keep things going. If the receiver is actively
! 168: * receiving data, it will ensure that the generator knows that it is
! 169: * not idle by sending the generator keep-alive messages (since the
! 170: * generator might be blocked trying to send checksums, it needs to
! 171: * know that the receiver is active). Thus, as long as one or the
! 172: * other is successfully doing work, the generator will not timeout. */
! 173: if (!io_timeout)
! 174: return;
! 175:
! 176: t = time(NULL);
! 177:
! 178: if (allow_keepalive) {
! 179: /* This may put data into iobuf.msg w/o flushing. */
! 180: maybe_send_keepalive(t, 0);
! 181: }
! 182:
! 183: if (!last_io_in)
! 184: last_io_in = t;
! 185:
! 186: if (am_receiver)
! 187: return;
! 188:
! 189: chk = MAX(last_io_out, last_io_in);
! 190: if (t - chk >= io_timeout) {
! 191: if (am_server)
! 192: msgs2stderr = 1;
! 193: rprintf(FERROR, "[%s] io timeout after %d seconds -- exiting\n",
! 194: who_am_i(), (int)(t-chk));
! 195: exit_cleanup(RERR_TIMEOUT);
! 196: }
! 197: }
! 198:
! 199: /* It's almost always an error to get an EOF when we're trying to read from the
! 200: * network, because the protocol is (for the most part) self-terminating.
! 201: *
! 202: * There is one case for the receiver when it is at the end of the transfer
! 203: * (hanging around reading any keep-alive packets that might come its way): if
! 204: * the sender dies before the generator's kill-signal comes through, we can end
! 205: * up here needing to loop until the kill-signal arrives. In this situation,
! 206: * kluge_around_eof will be < 0.
! 207: *
! 208: * There is another case for older protocol versions (< 24) where the module
! 209: * listing was not terminated, so we must ignore an EOF error in that case and
! 210: * exit. In this situation, kluge_around_eof will be > 0. */
! 211: static NORETURN void whine_about_eof(BOOL allow_kluge)
! 212: {
! 213: if (kluge_around_eof && allow_kluge) {
! 214: int i;
! 215: if (kluge_around_eof > 0)
! 216: exit_cleanup(0);
! 217: /* If we're still here after 10 seconds, exit with an error. */
! 218: for (i = 10*1000/20; i--; )
! 219: msleep(20);
! 220: }
! 221:
! 222: rprintf(FERROR, RSYNC_NAME ": connection unexpectedly closed "
! 223: "(%s bytes received so far) [%s]\n",
! 224: big_num(stats.total_read), who_am_i());
! 225:
! 226: exit_cleanup(RERR_STREAMIO);
! 227: }
! 228:
! 229: /* Do a safe read, handling any needed looping and error handling.
! 230: * Returns the count of the bytes read, which will only be different
! 231: * from "len" if we encountered an EOF. This routine is not used on
! 232: * the socket except very early in the transfer. */
! 233: static size_t safe_read(int fd, char *buf, size_t len)
! 234: {
! 235: size_t got;
! 236: int n;
! 237:
! 238: assert(fd != iobuf.in_fd);
! 239:
! 240: n = read(fd, buf, len);
! 241: if ((size_t)n == len || n == 0) {
! 242: if (DEBUG_GTE(IO, 2))
! 243: rprintf(FINFO, "[%s] safe_read(%d)=%ld\n", who_am_i(), fd, (long)n);
! 244: return n;
! 245: }
! 246: if (n < 0) {
! 247: if (errno != EINTR && errno != EWOULDBLOCK && errno != EAGAIN) {
! 248: read_failed:
! 249: rsyserr(FERROR, errno, "safe_read failed to read %ld bytes [%s]",
! 250: (long)len, who_am_i());
! 251: exit_cleanup(RERR_STREAMIO);
! 252: }
! 253: got = 0;
! 254: } else
! 255: got = n;
! 256:
! 257: while (1) {
! 258: struct timeval tv;
! 259: fd_set r_fds, e_fds;
! 260: int cnt;
! 261:
! 262: FD_ZERO(&r_fds);
! 263: FD_SET(fd, &r_fds);
! 264: FD_ZERO(&e_fds);
! 265: FD_SET(fd, &e_fds);
! 266: tv.tv_sec = select_timeout;
! 267: tv.tv_usec = 0;
! 268:
! 269: cnt = select(fd+1, &r_fds, NULL, &e_fds, &tv);
! 270: if (cnt <= 0) {
! 271: if (cnt < 0 && errno == EBADF) {
! 272: rsyserr(FERROR, errno, "safe_read select failed [%s]",
! 273: who_am_i());
! 274: exit_cleanup(RERR_FILEIO);
! 275: }
! 276: if (io_timeout)
! 277: maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
! 278: continue;
! 279: }
! 280:
! 281: /*if (FD_ISSET(fd, &e_fds))
! 282: rprintf(FINFO, "select exception on fd %d\n", fd); */
! 283:
! 284: if (FD_ISSET(fd, &r_fds)) {
! 285: n = read(fd, buf + got, len - got);
! 286: if (DEBUG_GTE(IO, 2))
! 287: rprintf(FINFO, "[%s] safe_read(%d)=%ld\n", who_am_i(), fd, (long)n);
! 288: if (n == 0)
! 289: break;
! 290: if (n < 0) {
! 291: if (errno == EINTR)
! 292: continue;
! 293: goto read_failed;
! 294: }
! 295: if ((got += (size_t)n) == len)
! 296: break;
! 297: }
! 298: }
! 299:
! 300: return got;
! 301: }
! 302:
! 303: static const char *what_fd_is(int fd)
! 304: {
! 305: static char buf[20];
! 306:
! 307: if (fd == sock_f_out)
! 308: return "socket";
! 309: else if (fd == iobuf.out_fd)
! 310: return "message fd";
! 311: else if (fd == batch_fd)
! 312: return "batch file";
! 313: else {
! 314: snprintf(buf, sizeof buf, "fd %d", fd);
! 315: return buf;
! 316: }
! 317: }
! 318:
! 319: /* Do a safe write, handling any needed looping and error handling.
! 320: * Returns only if everything was successfully written. This routine
! 321: * is not used on the socket except very early in the transfer. */
! 322: static void safe_write(int fd, const char *buf, size_t len)
! 323: {
! 324: int n;
! 325:
! 326: assert(fd != iobuf.out_fd);
! 327:
! 328: n = write(fd, buf, len);
! 329: if ((size_t)n == len)
! 330: return;
! 331: if (n < 0) {
! 332: if (errno != EINTR && errno != EWOULDBLOCK && errno != EAGAIN) {
! 333: write_failed:
! 334: rsyserr(FERROR, errno,
! 335: "safe_write failed to write %ld bytes to %s [%s]",
! 336: (long)len, what_fd_is(fd), who_am_i());
! 337: exit_cleanup(RERR_STREAMIO);
! 338: }
! 339: } else {
! 340: buf += n;
! 341: len -= n;
! 342: }
! 343:
! 344: while (len) {
! 345: struct timeval tv;
! 346: fd_set w_fds;
! 347: int cnt;
! 348:
! 349: FD_ZERO(&w_fds);
! 350: FD_SET(fd, &w_fds);
! 351: tv.tv_sec = select_timeout;
! 352: tv.tv_usec = 0;
! 353:
! 354: cnt = select(fd + 1, NULL, &w_fds, NULL, &tv);
! 355: if (cnt <= 0) {
! 356: if (cnt < 0 && errno == EBADF) {
! 357: rsyserr(FERROR, errno, "safe_write select failed on %s [%s]",
! 358: what_fd_is(fd), who_am_i());
! 359: exit_cleanup(RERR_FILEIO);
! 360: }
! 361: if (io_timeout)
! 362: maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
! 363: continue;
! 364: }
! 365:
! 366: if (FD_ISSET(fd, &w_fds)) {
! 367: n = write(fd, buf, len);
! 368: if (n < 0) {
! 369: if (errno == EINTR)
! 370: continue;
! 371: goto write_failed;
! 372: }
! 373: buf += n;
! 374: len -= n;
! 375: }
! 376: }
! 377: }
! 378:
! 379: /* This is only called when files-from data is known to be available. We read
! 380: * a chunk of data and put it into the output buffer. */
! 381: static void forward_filesfrom_data(void)
! 382: {
! 383: int len;
! 384:
! 385: len = read(ff_forward_fd, ff_xb.buf + ff_xb.len, ff_xb.size - ff_xb.len);
! 386: if (len <= 0) {
! 387: if (len == 0 || errno != EINTR) {
! 388: /* Send end-of-file marker */
! 389: ff_forward_fd = -1;
! 390: write_buf(iobuf.out_fd, "\0\0", ff_lastchar ? 2 : 1);
! 391: free_xbuf(&ff_xb);
! 392: if (ff_reenable_multiplex >= 0)
! 393: io_start_multiplex_out(ff_reenable_multiplex);
! 394: }
! 395: return;
! 396: }
! 397:
! 398: if (DEBUG_GTE(IO, 2))
! 399: rprintf(FINFO, "[%s] files-from read=%ld\n", who_am_i(), (long)len);
! 400:
! 401: #ifdef ICONV_OPTION
! 402: len += ff_xb.len;
! 403: #endif
! 404:
! 405: if (!eol_nulls) {
! 406: char *s = ff_xb.buf + len;
! 407: /* Transform CR and/or LF into '\0' */
! 408: while (s-- > ff_xb.buf) {
! 409: if (*s == '\n' || *s == '\r')
! 410: *s = '\0';
! 411: }
! 412: }
! 413:
! 414: if (ff_lastchar)
! 415: ff_xb.pos = 0;
! 416: else {
! 417: char *s = ff_xb.buf;
! 418: /* Last buf ended with a '\0', so don't let this buf start with one. */
! 419: while (len && *s == '\0')
! 420: s++, len--;
! 421: ff_xb.pos = s - ff_xb.buf;
! 422: }
! 423:
! 424: #ifdef ICONV_OPTION
! 425: if (filesfrom_convert && len) {
! 426: char *sob = ff_xb.buf + ff_xb.pos, *s = sob;
! 427: char *eob = sob + len;
! 428: int flags = ICB_INCLUDE_BAD | ICB_INCLUDE_INCOMPLETE | ICB_CIRCULAR_OUT;
! 429: if (ff_lastchar == '\0')
! 430: flags |= ICB_INIT;
! 431: /* Convert/send each null-terminated string separately, skipping empties. */
! 432: while (s != eob) {
! 433: if (*s++ == '\0') {
! 434: ff_xb.len = s - sob - 1;
! 435: if (iconvbufs(ic_send, &ff_xb, &iobuf.out, flags) < 0)
! 436: exit_cleanup(RERR_PROTOCOL); /* impossible? */
! 437: write_buf(iobuf.out_fd, s-1, 1); /* Send the '\0'. */
! 438: while (s != eob && *s == '\0')
! 439: s++;
! 440: sob = s;
! 441: ff_xb.pos = sob - ff_xb.buf;
! 442: flags |= ICB_INIT;
! 443: }
! 444: }
! 445:
! 446: if ((ff_xb.len = s - sob) == 0)
! 447: ff_lastchar = '\0';
! 448: else {
! 449: /* Handle a partial string specially, saving any incomplete chars. */
! 450: flags &= ~ICB_INCLUDE_INCOMPLETE;
! 451: if (iconvbufs(ic_send, &ff_xb, &iobuf.out, flags) < 0) {
! 452: if (errno == E2BIG)
! 453: exit_cleanup(RERR_PROTOCOL); /* impossible? */
! 454: if (ff_xb.pos)
! 455: memmove(ff_xb.buf, ff_xb.buf + ff_xb.pos, ff_xb.len);
! 456: }
! 457: ff_lastchar = 'x'; /* Anything non-zero. */
! 458: }
! 459: } else
! 460: #endif
! 461:
! 462: if (len) {
! 463: char *f = ff_xb.buf + ff_xb.pos;
! 464: char *t = ff_xb.buf;
! 465: char *eob = f + len;
! 466: /* Eliminate any multi-'\0' runs. */
! 467: while (f != eob) {
! 468: if (!(*t++ = *f++)) {
! 469: while (f != eob && *f == '\0')
! 470: f++;
! 471: }
! 472: }
! 473: ff_lastchar = f[-1];
! 474: if ((len = t - ff_xb.buf) != 0) {
! 475: /* This will not circle back to perform_io() because we only get
! 476: * called when there is plenty of room in the output buffer. */
! 477: write_buf(iobuf.out_fd, ff_xb.buf, len);
! 478: }
! 479: }
! 480: }
! 481:
! 482: void reduce_iobuf_size(xbuf *out, size_t new_size)
! 483: {
! 484: if (new_size < out->size) {
! 485: /* Avoid weird buffer interactions by only outputting this to stderr. */
! 486: if (msgs2stderr && DEBUG_GTE(IO, 4)) {
! 487: const char *name = out == &iobuf.out ? "iobuf.out"
! 488: : out == &iobuf.msg ? "iobuf.msg"
! 489: : NULL;
! 490: if (name) {
! 491: rprintf(FINFO, "[%s] reduced size of %s (-%d)\n",
! 492: who_am_i(), name, (int)(out->size - new_size));
! 493: }
! 494: }
! 495: out->size = new_size;
! 496: }
! 497: }
! 498:
! 499: void restore_iobuf_size(xbuf *out)
! 500: {
! 501: if (IOBUF_WAS_REDUCED(out->size)) {
! 502: size_t new_size = IOBUF_RESTORE_SIZE(out->size);
! 503: /* Avoid weird buffer interactions by only outputting this to stderr. */
! 504: if (msgs2stderr && DEBUG_GTE(IO, 4)) {
! 505: const char *name = out == &iobuf.out ? "iobuf.out"
! 506: : out == &iobuf.msg ? "iobuf.msg"
! 507: : NULL;
! 508: if (name) {
! 509: rprintf(FINFO, "[%s] restored size of %s (+%d)\n",
! 510: who_am_i(), name, (int)(new_size - out->size));
! 511: }
! 512: }
! 513: out->size = new_size;
! 514: }
! 515: }
! 516:
! 517: static void handle_kill_signal(BOOL flush_ok)
! 518: {
! 519: got_kill_signal = -1;
! 520: flush_ok_after_signal = flush_ok;
! 521: exit_cleanup(RERR_SIGNAL);
! 522: }
! 523:
! 524: /* Perform buffered input and/or output until specified conditions are met.
! 525: * When given a "needed" read or write request, this returns without doing any
! 526: * I/O if the needed input bytes or write space is already available. Once I/O
! 527: * is needed, this will try to do whatever reading and/or writing is currently
! 528: * possible, up to the maximum buffer allowances, no matter if this is a read
! 529: * or write request. However, the I/O stops as soon as the required input
! 530: * bytes or output space is available. If this is not a read request, the
! 531: * routine may also do some advantageous reading of messages from a multiplexed
! 532: * input source (which ensures that we don't jam up with everyone in their
! 533: * "need to write" code and nobody reading the accumulated data that would make
! 534: * writing possible).
! 535: *
! 536: * The iobuf.in, .out and .msg buffers are all circular. Callers need to be
! 537: * aware that some data copies will need to be split when the bytes wrap around
! 538: * from the end to the start. In order to help make writing into the output
! 539: * buffers easier for some operations (such as the use of SIVAL() into the
! 540: * buffer) a buffer may be temporarily shortened by a small amount, but the
! 541: * original size will be automatically restored when the .pos wraps to the
! 542: * start. See also the 3 raw_* iobuf vars that are used in the handling of
! 543: * MSG_DATA bytes as they are read-from/written-into the buffers.
! 544: *
! 545: * When writing, we flush data in the following priority order:
! 546: *
! 547: * 1. Finish writing any in-progress MSG_DATA sequence from iobuf.out.
! 548: *
! 549: * 2. Write out all the messages from the message buf (if iobuf.msg is active).
! 550: * Yes, this means that a PIO_NEED_OUTROOM call will completely flush any
! 551: * messages before getting to the iobuf.out flushing (except for rule 1).
! 552: *
! 553: * 3. Write out the raw data from iobuf.out, possibly filling in the multiplexed
! 554: * MSG_DATA header that was pre-allocated (when output is multiplexed).
! 555: *
! 556: * TODO: items for possible future work:
! 557: *
! 558: * - Make this routine able to read the generator-to-receiver batch flow?
! 559: *
! 560: * Unlike the old routines that this replaces, it is OK to read ahead as far as
! 561: * we can because the read_a_msg() routine now reads its bytes out of the input
! 562: * buffer. In the old days, only raw data was in the input buffer, and any
! 563: * unused raw data in the buf would prevent the reading of socket data. */
! 564: static char *perform_io(size_t needed, int flags)
! 565: {
! 566: fd_set r_fds, e_fds, w_fds;
! 567: struct timeval tv;
! 568: int cnt, max_fd;
! 569: size_t empty_buf_len = 0;
! 570: xbuf *out;
! 571: char *data;
! 572:
! 573: if (iobuf.in.len == 0 && iobuf.in.pos != 0) {
! 574: if (iobuf.raw_input_ends_before)
! 575: iobuf.raw_input_ends_before -= iobuf.in.pos;
! 576: iobuf.in.pos = 0;
! 577: }
! 578:
! 579: switch (flags & PIO_NEED_FLAGS) {
! 580: case PIO_NEED_INPUT:
! 581: /* We never resize the circular input buffer. */
! 582: if (iobuf.in.size < needed) {
! 583: rprintf(FERROR, "need to read %ld bytes, iobuf.in.buf is only %ld bytes.\n",
! 584: (long)needed, (long)iobuf.in.size);
! 585: exit_cleanup(RERR_PROTOCOL);
! 586: }
! 587:
! 588: if (msgs2stderr && DEBUG_GTE(IO, 3)) {
! 589: rprintf(FINFO, "[%s] perform_io(%ld, %sinput)\n",
! 590: who_am_i(), (long)needed, flags & PIO_CONSUME_INPUT ? "consume&" : "");
! 591: }
! 592: break;
! 593:
! 594: case PIO_NEED_OUTROOM:
! 595: /* We never resize the circular output buffer. */
! 596: if (iobuf.out.size - iobuf.out_empty_len < needed) {
! 597: fprintf(stderr, "need to write %ld bytes, iobuf.out.buf is only %ld bytes.\n",
! 598: (long)needed, (long)(iobuf.out.size - iobuf.out_empty_len));
! 599: exit_cleanup(RERR_PROTOCOL);
! 600: }
! 601:
! 602: if (msgs2stderr && DEBUG_GTE(IO, 3)) {
! 603: rprintf(FINFO, "[%s] perform_io(%ld, outroom) needs to flush %ld\n",
! 604: who_am_i(), (long)needed,
! 605: iobuf.out.len + needed > iobuf.out.size
! 606: ? (long)(iobuf.out.len + needed - iobuf.out.size) : 0L);
! 607: }
! 608: break;
! 609:
! 610: case PIO_NEED_MSGROOM:
! 611: /* We never resize the circular message buffer. */
! 612: if (iobuf.msg.size < needed) {
! 613: fprintf(stderr, "need to write %ld bytes, iobuf.msg.buf is only %ld bytes.\n",
! 614: (long)needed, (long)iobuf.msg.size);
! 615: exit_cleanup(RERR_PROTOCOL);
! 616: }
! 617:
! 618: if (msgs2stderr && DEBUG_GTE(IO, 3)) {
! 619: rprintf(FINFO, "[%s] perform_io(%ld, msgroom) needs to flush %ld\n",
! 620: who_am_i(), (long)needed,
! 621: iobuf.msg.len + needed > iobuf.msg.size
! 622: ? (long)(iobuf.msg.len + needed - iobuf.msg.size) : 0L);
! 623: }
! 624: break;
! 625:
! 626: case 0:
! 627: if (msgs2stderr && DEBUG_GTE(IO, 3))
! 628: rprintf(FINFO, "[%s] perform_io(%ld, %d)\n", who_am_i(), (long)needed, flags);
! 629: break;
! 630:
! 631: default:
! 632: exit_cleanup(RERR_UNSUPPORTED);
! 633: }
! 634:
! 635: while (1) {
! 636: switch (flags & PIO_NEED_FLAGS) {
! 637: case PIO_NEED_INPUT:
! 638: if (iobuf.in.len >= needed)
! 639: goto double_break;
! 640: break;
! 641: case PIO_NEED_OUTROOM:
! 642: /* Note that iobuf.out_empty_len doesn't factor into this check
! 643: * because iobuf.out.len already holds any needed header len. */
! 644: if (iobuf.out.len + needed <= iobuf.out.size)
! 645: goto double_break;
! 646: break;
! 647: case PIO_NEED_MSGROOM:
! 648: if (iobuf.msg.len + needed <= iobuf.msg.size)
! 649: goto double_break;
! 650: break;
! 651: }
! 652:
! 653: max_fd = -1;
! 654:
! 655: FD_ZERO(&r_fds);
! 656: FD_ZERO(&e_fds);
! 657: if (iobuf.in_fd >= 0 && iobuf.in.size - iobuf.in.len) {
! 658: if (!read_batch || batch_fd >= 0) {
! 659: FD_SET(iobuf.in_fd, &r_fds);
! 660: FD_SET(iobuf.in_fd, &e_fds);
! 661: }
! 662: if (iobuf.in_fd > max_fd)
! 663: max_fd = iobuf.in_fd;
! 664: }
! 665:
! 666: /* Only do more filesfrom processing if there is enough room in the out buffer. */
! 667: if (ff_forward_fd >= 0 && iobuf.out.size - iobuf.out.len > FILESFROM_BUFLEN*2) {
! 668: FD_SET(ff_forward_fd, &r_fds);
! 669: if (ff_forward_fd > max_fd)
! 670: max_fd = ff_forward_fd;
! 671: }
! 672:
! 673: FD_ZERO(&w_fds);
! 674: if (iobuf.out_fd >= 0) {
! 675: if (iobuf.raw_flushing_ends_before
! 676: || (!iobuf.msg.len && iobuf.out.len > iobuf.out_empty_len && !(flags & PIO_NEED_MSGROOM))) {
! 677: if (OUT_MULTIPLEXED && !iobuf.raw_flushing_ends_before) {
! 678: /* The iobuf.raw_flushing_ends_before value can point off the end
! 679: * of the iobuf.out buffer for a while, for easier subtracting. */
! 680: iobuf.raw_flushing_ends_before = iobuf.out.pos + iobuf.out.len;
! 681:
! 682: SIVAL(iobuf.out.buf + iobuf.raw_data_header_pos, 0,
! 683: ((MPLEX_BASE + (int)MSG_DATA)<<24) + iobuf.out.len - 4);
! 684:
! 685: if (msgs2stderr && DEBUG_GTE(IO, 1)) {
! 686: rprintf(FINFO, "[%s] send_msg(%d, %ld)\n",
! 687: who_am_i(), (int)MSG_DATA, (long)iobuf.out.len - 4);
! 688: }
! 689:
! 690: /* reserve room for the next MSG_DATA header */
! 691: iobuf.raw_data_header_pos = iobuf.raw_flushing_ends_before;
! 692: if (iobuf.raw_data_header_pos >= iobuf.out.size)
! 693: iobuf.raw_data_header_pos -= iobuf.out.size;
! 694: else if (iobuf.raw_data_header_pos + 4 > iobuf.out.size) {
! 695: /* The 4-byte header won't fit at the end of the buffer,
! 696: * so we'll temporarily reduce the output buffer's size
! 697: * and put the header at the start of the buffer. */
! 698: reduce_iobuf_size(&iobuf.out, iobuf.raw_data_header_pos);
! 699: iobuf.raw_data_header_pos = 0;
! 700: }
! 701: /* Yes, it is possible for this to make len > size for a while. */
! 702: iobuf.out.len += 4;
! 703: }
! 704:
! 705: empty_buf_len = iobuf.out_empty_len;
! 706: out = &iobuf.out;
! 707: } else if (iobuf.msg.len) {
! 708: empty_buf_len = 0;
! 709: out = &iobuf.msg;
! 710: } else
! 711: out = NULL;
! 712: if (out) {
! 713: FD_SET(iobuf.out_fd, &w_fds);
! 714: if (iobuf.out_fd > max_fd)
! 715: max_fd = iobuf.out_fd;
! 716: }
! 717: } else
! 718: out = NULL;
! 719:
! 720: if (max_fd < 0) {
! 721: switch (flags & PIO_NEED_FLAGS) {
! 722: case PIO_NEED_INPUT:
! 723: iobuf.in.len = 0;
! 724: if (kluge_around_eof == 2)
! 725: exit_cleanup(0);
! 726: if (iobuf.in_fd == -2)
! 727: whine_about_eof(True);
! 728: rprintf(FERROR, "error in perform_io: no fd for input.\n");
! 729: exit_cleanup(RERR_PROTOCOL);
! 730: case PIO_NEED_OUTROOM:
! 731: case PIO_NEED_MSGROOM:
! 732: msgs2stderr = 1;
! 733: drain_multiplex_messages();
! 734: if (iobuf.out_fd == -2)
! 735: whine_about_eof(True);
! 736: rprintf(FERROR, "error in perform_io: no fd for output.\n");
! 737: exit_cleanup(RERR_PROTOCOL);
! 738: default:
! 739: /* No stated needs, so I guess this is OK. */
! 740: break;
! 741: }
! 742: break;
! 743: }
! 744:
! 745: if (got_kill_signal > 0)
! 746: handle_kill_signal(True);
! 747:
! 748: if (extra_flist_sending_enabled) {
! 749: if (file_total - file_old_total < MAX_FILECNT_LOOKAHEAD && IN_MULTIPLEXED_AND_READY)
! 750: tv.tv_sec = 0;
! 751: else {
! 752: extra_flist_sending_enabled = False;
! 753: tv.tv_sec = select_timeout;
! 754: }
! 755: } else
! 756: tv.tv_sec = select_timeout;
! 757: tv.tv_usec = 0;
! 758:
! 759: cnt = select(max_fd + 1, &r_fds, &w_fds, &e_fds, &tv);
! 760:
! 761: if (cnt <= 0) {
! 762: if (cnt < 0 && errno == EBADF) {
! 763: msgs2stderr = 1;
! 764: exit_cleanup(RERR_SOCKETIO);
! 765: }
! 766: if (extra_flist_sending_enabled) {
! 767: extra_flist_sending_enabled = False;
! 768: send_extra_file_list(sock_f_out, -1);
! 769: extra_flist_sending_enabled = !flist_eof;
! 770: } else
! 771: check_timeout((flags & PIO_NEED_INPUT) != 0);
! 772: FD_ZERO(&r_fds); /* Just in case... */
! 773: FD_ZERO(&w_fds);
! 774: }
! 775:
! 776: if (iobuf.in_fd >= 0 && FD_ISSET(iobuf.in_fd, &r_fds)) {
! 777: size_t len, pos = iobuf.in.pos + iobuf.in.len;
! 778: int n;
! 779: if (pos >= iobuf.in.size) {
! 780: pos -= iobuf.in.size;
! 781: len = iobuf.in.size - iobuf.in.len;
! 782: } else
! 783: len = iobuf.in.size - pos;
! 784: if ((n = read(iobuf.in_fd, iobuf.in.buf + pos, len)) <= 0) {
! 785: if (n == 0) {
! 786: /* Signal that input has become invalid. */
! 787: if (!read_batch || batch_fd < 0 || am_generator)
! 788: iobuf.in_fd = -2;
! 789: batch_fd = -1;
! 790: continue;
! 791: }
! 792: if (errno == EINTR || errno == EWOULDBLOCK || errno == EAGAIN)
! 793: n = 0;
! 794: else {
! 795: /* Don't write errors on a dead socket. */
! 796: if (iobuf.in_fd == sock_f_in) {
! 797: if (am_sender)
! 798: msgs2stderr = 1;
! 799: rsyserr(FERROR_SOCKET, errno, "read error");
! 800: } else
! 801: rsyserr(FERROR, errno, "read error");
! 802: exit_cleanup(RERR_SOCKETIO);
! 803: }
! 804: }
! 805: if (msgs2stderr && DEBUG_GTE(IO, 2))
! 806: rprintf(FINFO, "[%s] recv=%ld\n", who_am_i(), (long)n);
! 807:
! 808: if (io_timeout) {
! 809: last_io_in = time(NULL);
! 810: if (flags & PIO_NEED_INPUT)
! 811: maybe_send_keepalive(last_io_in, 0);
! 812: }
! 813: stats.total_read += n;
! 814:
! 815: iobuf.in.len += n;
! 816: }
! 817:
! 818: if (out && FD_ISSET(iobuf.out_fd, &w_fds)) {
! 819: size_t len = iobuf.raw_flushing_ends_before ? iobuf.raw_flushing_ends_before - out->pos : out->len;
! 820: int n;
! 821:
! 822: if (bwlimit_writemax && len > bwlimit_writemax)
! 823: len = bwlimit_writemax;
! 824:
! 825: if (out->pos + len > out->size)
! 826: len = out->size - out->pos;
! 827: if ((n = write(iobuf.out_fd, out->buf + out->pos, len)) <= 0) {
! 828: if (errno == EINTR || errno == EWOULDBLOCK || errno == EAGAIN)
! 829: n = 0;
! 830: else {
! 831: /* Don't write errors on a dead socket. */
! 832: msgs2stderr = 1;
! 833: iobuf.out_fd = -2;
! 834: iobuf.out.len = iobuf.msg.len = iobuf.raw_flushing_ends_before = 0;
! 835: rsyserr(FERROR_SOCKET, errno, "[%s] write error", who_am_i());
! 836: drain_multiplex_messages();
! 837: exit_cleanup(RERR_SOCKETIO);
! 838: }
! 839: }
! 840: if (msgs2stderr && DEBUG_GTE(IO, 2)) {
! 841: rprintf(FINFO, "[%s] %s sent=%ld\n",
! 842: who_am_i(), out == &iobuf.out ? "out" : "msg", (long)n);
! 843: }
! 844:
! 845: if (io_timeout)
! 846: last_io_out = time(NULL);
! 847: stats.total_written += n;
! 848:
! 849: if (bwlimit_writemax)
! 850: sleep_for_bwlimit(n);
! 851:
! 852: if ((out->pos += n) == out->size) {
! 853: if (iobuf.raw_flushing_ends_before)
! 854: iobuf.raw_flushing_ends_before -= out->size;
! 855: out->pos = 0;
! 856: restore_iobuf_size(out);
! 857: } else if (out->pos == iobuf.raw_flushing_ends_before)
! 858: iobuf.raw_flushing_ends_before = 0;
! 859: if ((out->len -= n) == empty_buf_len) {
! 860: out->pos = 0;
! 861: restore_iobuf_size(out);
! 862: if (empty_buf_len)
! 863: iobuf.raw_data_header_pos = 0;
! 864: }
! 865: }
! 866:
! 867: if (got_kill_signal > 0)
! 868: handle_kill_signal(True);
! 869:
! 870: /* We need to help prevent deadlock by doing what reading
! 871: * we can whenever we are here trying to write. */
! 872: if (IN_MULTIPLEXED_AND_READY && !(flags & PIO_NEED_INPUT)) {
! 873: while (!iobuf.raw_input_ends_before && iobuf.in.len > 512)
! 874: read_a_msg();
! 875: if (flist_receiving_enabled && iobuf.in.len > 512)
! 876: wait_for_receiver(); /* generator only */
! 877: }
! 878:
! 879: if (ff_forward_fd >= 0 && FD_ISSET(ff_forward_fd, &r_fds)) {
! 880: /* This can potentially flush all output and enable
! 881: * multiplexed output, so keep this last in the loop
! 882: * and be sure to not cache anything that would break
! 883: * such a change. */
! 884: forward_filesfrom_data();
! 885: }
! 886: }
! 887: double_break:
! 888:
! 889: if (got_kill_signal > 0)
! 890: handle_kill_signal(True);
! 891:
! 892: data = iobuf.in.buf + iobuf.in.pos;
! 893:
! 894: if (flags & PIO_CONSUME_INPUT) {
! 895: iobuf.in.len -= needed;
! 896: iobuf.in.pos += needed;
! 897: if (iobuf.in.pos == iobuf.raw_input_ends_before)
! 898: iobuf.raw_input_ends_before = 0;
! 899: if (iobuf.in.pos >= iobuf.in.size) {
! 900: iobuf.in.pos -= iobuf.in.size;
! 901: if (iobuf.raw_input_ends_before)
! 902: iobuf.raw_input_ends_before -= iobuf.in.size;
! 903: }
! 904: }
! 905:
! 906: return data;
! 907: }
! 908:
! 909: static void raw_read_buf(char *buf, size_t len)
! 910: {
! 911: size_t pos = iobuf.in.pos;
! 912: char *data = perform_io(len, PIO_INPUT_AND_CONSUME);
! 913: if (iobuf.in.pos <= pos && len) {
! 914: size_t siz = len - iobuf.in.pos;
! 915: memcpy(buf, data, siz);
! 916: memcpy(buf + siz, iobuf.in.buf, iobuf.in.pos);
! 917: } else
! 918: memcpy(buf, data, len);
! 919: }
! 920:
! 921: static int32 raw_read_int(void)
! 922: {
! 923: char *data, buf[4];
! 924: if (iobuf.in.size - iobuf.in.pos >= 4)
! 925: data = perform_io(4, PIO_INPUT_AND_CONSUME);
! 926: else
! 927: raw_read_buf(data = buf, 4);
! 928: return IVAL(data, 0);
! 929: }
! 930:
! 931: void noop_io_until_death(void)
! 932: {
! 933: char buf[1024];
! 934:
! 935: if (!iobuf.in.buf || !iobuf.out.buf || iobuf.in_fd < 0 || iobuf.out_fd < 0 || kluge_around_eof)
! 936: return;
! 937:
! 938: kluge_around_eof = 2;
! 939: /* Setting an I/O timeout ensures that if something inexplicably weird
! 940: * happens, we won't hang around forever. */
! 941: if (!io_timeout)
! 942: set_io_timeout(60);
! 943:
! 944: while (1)
! 945: read_buf(iobuf.in_fd, buf, sizeof buf);
! 946: }
! 947:
! 948: /* Buffer a message for the multiplexed output stream. Is not used for (normal) MSG_DATA. */
! 949: int send_msg(enum msgcode code, const char *buf, size_t len, int convert)
1.1 misho 950: {
1.1.1.2 ! misho 951: char *hdr;
! 952: size_t needed, pos;
! 953: BOOL want_debug = DEBUG_GTE(IO, 1) && convert >= 0 && (msgs2stderr || code != MSG_INFO);
1.1 misho 954:
1.1.1.2 ! misho 955: if (!OUT_MULTIPLEXED)
! 956: return 0;
1.1 misho 957:
1.1.1.2 ! misho 958: if (want_debug)
! 959: rprintf(FINFO, "[%s] send_msg(%d, %ld)\n", who_am_i(), (int)code, (long)len);
1.1 misho 960:
1.1.1.2 ! misho 961: /* When checking for enough free space for this message, we need to
! 962: * make sure that there is space for the 4-byte header, plus we'll
! 963: * assume that we may waste up to 3 bytes (if the header doesn't fit
! 964: * at the physical end of the buffer). */
! 965: #ifdef ICONV_OPTION
! 966: if (convert > 0 && ic_send == (iconv_t)-1)
! 967: convert = 0;
! 968: if (convert > 0) {
! 969: /* Ensuring double-size room leaves space for maximal conversion expansion. */
! 970: needed = len*2 + 4 + 3;
! 971: } else
! 972: #endif
! 973: needed = len + 4 + 3;
! 974: if (iobuf.msg.len + needed > iobuf.msg.size)
! 975: perform_io(needed, PIO_NEED_MSGROOM);
! 976:
! 977: pos = iobuf.msg.pos + iobuf.msg.len; /* Must be set after any flushing. */
! 978: if (pos >= iobuf.msg.size)
! 979: pos -= iobuf.msg.size;
! 980: else if (pos + 4 > iobuf.msg.size) {
! 981: /* The 4-byte header won't fit at the end of the buffer,
! 982: * so we'll temporarily reduce the message buffer's size
! 983: * and put the header at the start of the buffer. */
! 984: reduce_iobuf_size(&iobuf.msg, pos);
! 985: pos = 0;
! 986: }
! 987: hdr = iobuf.msg.buf + pos;
1.1 misho 988:
1.1.1.2 ! misho 989: iobuf.msg.len += 4; /* Allocate room for the coming header bytes. */
! 990:
! 991: #ifdef ICONV_OPTION
! 992: if (convert > 0) {
! 993: xbuf inbuf;
! 994:
! 995: INIT_XBUF(inbuf, (char*)buf, len, (size_t)-1);
! 996:
! 997: len = iobuf.msg.len;
! 998: iconvbufs(ic_send, &inbuf, &iobuf.msg,
! 999: ICB_INCLUDE_BAD | ICB_INCLUDE_INCOMPLETE | ICB_CIRCULAR_OUT | ICB_INIT);
! 1000: if (inbuf.len > 0) {
! 1001: rprintf(FERROR, "overflowed iobuf.msg buffer in send_msg");
! 1002: exit_cleanup(RERR_UNSUPPORTED);
! 1003: }
! 1004: len = iobuf.msg.len - len;
! 1005: } else
! 1006: #endif
! 1007: {
! 1008: size_t siz;
! 1009:
! 1010: if ((pos += 4) == iobuf.msg.size)
! 1011: pos = 0;
! 1012:
! 1013: /* Handle a split copy if we wrap around the end of the circular buffer. */
! 1014: if (pos >= iobuf.msg.pos && (siz = iobuf.msg.size - pos) < len) {
! 1015: memcpy(iobuf.msg.buf + pos, buf, siz);
! 1016: memcpy(iobuf.msg.buf, buf + siz, len - siz);
! 1017: } else
! 1018: memcpy(iobuf.msg.buf + pos, buf, len);
! 1019:
! 1020: iobuf.msg.len += len;
1.1 misho 1021: }
1022:
1.1.1.2 ! misho 1023: SIVAL(hdr, 0, ((MPLEX_BASE + (int)code)<<24) + len);
1.1 misho 1024:
1.1.1.2 ! misho 1025: if (want_debug && convert > 0)
! 1026: rprintf(FINFO, "[%s] converted msg len=%ld\n", who_am_i(), (long)len);
1.1 misho 1027:
1.1.1.2 ! misho 1028: return 1;
! 1029: }
1.1 misho 1030:
1.1.1.2 ! misho 1031: void send_msg_int(enum msgcode code, int num)
! 1032: {
! 1033: char numbuf[4];
! 1034:
! 1035: if (DEBUG_GTE(IO, 1))
! 1036: rprintf(FINFO, "[%s] send_msg_int(%d, %d)\n", who_am_i(), (int)code, num);
1.1 misho 1037:
1.1.1.2 ! misho 1038: SIVAL(numbuf, 0, num);
! 1039: send_msg(code, numbuf, 4, -1);
! 1040: }
1.1 misho 1041:
1.1.1.2 ! misho 1042: static void got_flist_entry_status(enum festatus status, int ndx)
1.1 misho 1043: {
1044: struct file_list *flist = flist_for_ndx(ndx, "got_flist_entry_status");
1045:
1046: if (remove_source_files) {
1047: active_filecnt--;
1048: active_bytecnt -= F_LENGTH(flist->files[ndx - flist->ndx_start]);
1049: }
1050:
1051: if (inc_recurse)
1052: flist->in_progress--;
1053:
1054: switch (status) {
1055: case FES_SUCCESS:
1056: if (remove_source_files)
1.1.1.2 ! misho 1057: send_msg_int(MSG_SUCCESS, ndx);
1.1 misho 1058: /* FALL THROUGH */
1059: case FES_NO_SEND:
1060: #ifdef SUPPORT_HARD_LINKS
1061: if (preserve_hard_links) {
1062: struct file_struct *file = flist->files[ndx - flist->ndx_start];
1063: if (F_IS_HLINKED(file)) {
1064: if (status == FES_NO_SEND)
1065: flist_ndx_push(&hlink_list, -2); /* indicates a failure follows */
1066: flist_ndx_push(&hlink_list, ndx);
1.1.1.2 ! misho 1067: if (inc_recurse)
! 1068: flist->in_progress++;
1.1 misho 1069: }
1070: }
1071: #endif
1072: break;
1073: case FES_REDO:
1074: if (read_batch) {
1075: if (inc_recurse)
1076: flist->in_progress++;
1077: break;
1078: }
1079: if (inc_recurse)
1080: flist->to_redo++;
1081: flist_ndx_push(&redo_list, ndx);
1082: break;
1083: }
1084: }
1085:
1086: /* Note the fds used for the main socket (which might really be a pipe
1087: * for a local transfer, but we can ignore that). */
1088: void io_set_sock_fds(int f_in, int f_out)
1089: {
1090: sock_f_in = f_in;
1091: sock_f_out = f_out;
1092: }
1093:
1094: void set_io_timeout(int secs)
1095: {
1096: io_timeout = secs;
1097: allowed_lull = (io_timeout + 1) / 2;
1098:
1099: if (!io_timeout || allowed_lull > SELECT_TIMEOUT)
1100: select_timeout = SELECT_TIMEOUT;
1101: else
1102: select_timeout = allowed_lull;
1103:
1104: if (read_batch)
1105: allowed_lull = 0;
1106: }
1107:
1108: static void check_for_d_option_error(const char *msg)
1109: {
1110: static char rsync263_opts[] = "BCDHIKLPRSTWabceghlnopqrtuvxz";
1111: char *colon;
1112: int saw_d = 0;
1113:
1114: if (*msg != 'r'
1115: || strncmp(msg, REMOTE_OPTION_ERROR, sizeof REMOTE_OPTION_ERROR - 1) != 0)
1116: return;
1117:
1118: msg += sizeof REMOTE_OPTION_ERROR - 1;
1119: if (*msg == '-' || (colon = strchr(msg, ':')) == NULL
1120: || strncmp(colon, REMOTE_OPTION_ERROR2, sizeof REMOTE_OPTION_ERROR2 - 1) != 0)
1121: return;
1122:
1123: for ( ; *msg != ':'; msg++) {
1124: if (*msg == 'd')
1125: saw_d = 1;
1126: else if (*msg == 'e')
1127: break;
1128: else if (strchr(rsync263_opts, *msg) == NULL)
1129: return;
1130: }
1131:
1132: if (saw_d) {
1133: rprintf(FWARNING,
1134: "*** Try using \"--old-d\" if remote rsync is <= 2.6.3 ***\n");
1135: }
1136: }
1137:
1138: /* This is used by the generator to limit how many file transfers can
1139: * be active at once when --remove-source-files is specified. Without
1140: * this, sender-side deletions were mostly happening at the end. */
1141: void increment_active_files(int ndx, int itemizing, enum logcode code)
1142: {
1143: while (1) {
1144: /* TODO: tune these limits? */
1145: int limit = active_bytecnt >= 128*1024 ? 10 : 50;
1146: if (active_filecnt < limit)
1147: break;
1148: check_for_finished_files(itemizing, code, 0);
1149: if (active_filecnt < limit)
1150: break;
1.1.1.2 ! misho 1151: wait_for_receiver();
1.1 misho 1152: }
1153:
1154: active_filecnt++;
1155: active_bytecnt += F_LENGTH(cur_flist->files[ndx - cur_flist->ndx_start]);
1156: }
1157:
1158: int get_redo_num(void)
1159: {
1160: return flist_ndx_pop(&redo_list);
1161: }
1162:
1163: int get_hlink_num(void)
1164: {
1165: return flist_ndx_pop(&hlink_list);
1166: }
1167:
1.1.1.2 ! misho 1168: /* When we're the receiver and we have a local --files-from list of names
1.1 misho 1169: * that needs to be sent over the socket to the sender, we have to do two
1170: * things at the same time: send the sender a list of what files we're
1171: * processing and read the incoming file+info list from the sender. We do
1.1.1.2 ! misho 1172: * this by making recv_file_list() call forward_filesfrom_data(), which
! 1173: * will ensure that we forward data to the sender until we get some data
! 1174: * for recv_file_list() to use. */
! 1175: void start_filesfrom_forwarding(int fd)
! 1176: {
! 1177: if (protocol_version < 31 && OUT_MULTIPLEXED) {
! 1178: /* Older protocols send the files-from data w/o packaging
! 1179: * it in multiplexed I/O packets, so temporarily switch
! 1180: * to buffered I/O to match this behavior. */
! 1181: iobuf.msg.pos = iobuf.msg.len = 0; /* Be extra sure no messages go out. */
! 1182: ff_reenable_multiplex = io_end_multiplex_out(MPLX_TO_BUFFERED);
1.1 misho 1183: }
1.1.1.2 ! misho 1184: ff_forward_fd = fd;
1.1 misho 1185:
1.1.1.2 ! misho 1186: alloc_xbuf(&ff_xb, FILESFROM_BUFLEN);
1.1 misho 1187: }
1188:
1189: /* Read a line into the "buf" buffer. */
1190: int read_line(int fd, char *buf, size_t bufsiz, int flags)
1191: {
1192: char ch, *s, *eob;
1193:
1194: #ifdef ICONV_OPTION
1195: if (flags & RL_CONVERT && iconv_buf.size < bufsiz)
1196: realloc_xbuf(&iconv_buf, bufsiz + 1024);
1197: #endif
1198:
1199: start:
1200: #ifdef ICONV_OPTION
1201: s = flags & RL_CONVERT ? iconv_buf.buf : buf;
1202: #else
1203: s = buf;
1204: #endif
1205: eob = s + bufsiz - 1;
1206: while (1) {
1.1.1.2 ! misho 1207: /* We avoid read_byte() for files because files can return an EOF. */
! 1208: if (fd == iobuf.in_fd)
! 1209: ch = read_byte(fd);
! 1210: else if (safe_read(fd, &ch, 1) == 0)
1.1 misho 1211: break;
1212: if (flags & RL_EOL_NULLS ? ch == '\0' : (ch == '\r' || ch == '\n')) {
1213: /* Skip empty lines if dumping comments. */
1214: if (flags & RL_DUMP_COMMENTS && s == buf)
1215: continue;
1216: break;
1217: }
1218: if (s < eob)
1219: *s++ = ch;
1220: }
1221: *s = '\0';
1222:
1223: if (flags & RL_DUMP_COMMENTS && (*buf == '#' || *buf == ';'))
1224: goto start;
1225:
1226: #ifdef ICONV_OPTION
1227: if (flags & RL_CONVERT) {
1228: xbuf outbuf;
1229: INIT_XBUF(outbuf, buf, 0, bufsiz);
1230: iconv_buf.pos = 0;
1231: iconv_buf.len = s - iconv_buf.buf;
1232: iconvbufs(ic_recv, &iconv_buf, &outbuf,
1.1.1.2 ! misho 1233: ICB_INCLUDE_BAD | ICB_INCLUDE_INCOMPLETE | ICB_INIT);
1.1 misho 1234: outbuf.buf[outbuf.len] = '\0';
1235: return outbuf.len;
1236: }
1237: #endif
1238:
1239: return s - buf;
1240: }
1241:
1242: void read_args(int f_in, char *mod_name, char *buf, size_t bufsiz, int rl_nulls,
1243: char ***argv_p, int *argc_p, char **request_p)
1244: {
1245: int maxargs = MAX_ARGS;
1.1.1.2 ! misho 1246: int dot_pos = 0, argc = 0, request_len = 0;
1.1 misho 1247: char **argv, *p;
1248: int rl_flags = (rl_nulls ? RL_EOL_NULLS : 0);
1249:
1250: #ifdef ICONV_OPTION
1251: rl_flags |= (protect_args && ic_recv != (iconv_t)-1 ? RL_CONVERT : 0);
1252: #endif
1253:
1254: if (!(argv = new_array(char *, maxargs)))
1255: out_of_memory("read_args");
1256: if (mod_name && !protect_args)
1257: argv[argc++] = "rsyncd";
1258:
1.1.1.2 ! misho 1259: if (request_p)
! 1260: *request_p = NULL;
! 1261:
1.1 misho 1262: while (1) {
1263: if (read_line(f_in, buf, bufsiz, rl_flags) == 0)
1264: break;
1265:
1266: if (argc == maxargs-1) {
1267: maxargs += MAX_ARGS;
1268: if (!(argv = realloc_array(argv, char *, maxargs)))
1269: out_of_memory("read_args");
1270: }
1271:
1272: if (dot_pos) {
1.1.1.2 ! misho 1273: if (request_p && request_len < 1024) {
! 1274: int len = strlen(buf);
! 1275: if (request_len)
! 1276: request_p[0][request_len++] = ' ';
! 1277: if (!(*request_p = realloc_array(*request_p, char, request_len + len + 1)))
! 1278: out_of_memory("read_args");
! 1279: memcpy(*request_p + request_len, buf, len + 1);
! 1280: request_len += len;
1.1 misho 1281: }
1282: if (mod_name)
1283: glob_expand_module(mod_name, buf, &argv, &argc, &maxargs);
1284: else
1285: glob_expand(buf, &argv, &argc, &maxargs);
1286: } else {
1287: if (!(p = strdup(buf)))
1288: out_of_memory("read_args");
1289: argv[argc++] = p;
1290: if (*p == '.' && p[1] == '\0')
1291: dot_pos = argc;
1292: }
1293: }
1294: argv[argc] = NULL;
1295:
1296: glob_expand(NULL, NULL, NULL, NULL);
1297:
1298: *argc_p = argc;
1299: *argv_p = argv;
1300: }
1301:
1.1.1.2 ! misho 1302: BOOL io_start_buffering_out(int f_out)
1.1 misho 1303: {
1.1.1.2 ! misho 1304: if (msgs2stderr && DEBUG_GTE(IO, 2))
! 1305: rprintf(FINFO, "[%s] io_start_buffering_out(%d)\n", who_am_i(), f_out);
! 1306:
! 1307: if (iobuf.out.buf) {
! 1308: if (iobuf.out_fd == -1)
! 1309: iobuf.out_fd = f_out;
! 1310: else
! 1311: assert(f_out == iobuf.out_fd);
! 1312: return False;
1.1 misho 1313: }
1.1.1.2 ! misho 1314:
! 1315: alloc_xbuf(&iobuf.out, ROUND_UP_1024(IO_BUFFER_SIZE * 2));
! 1316: iobuf.out_fd = f_out;
! 1317:
! 1318: return True;
! 1319: }
! 1320:
! 1321: BOOL io_start_buffering_in(int f_in)
! 1322: {
! 1323: if (msgs2stderr && DEBUG_GTE(IO, 2))
! 1324: rprintf(FINFO, "[%s] io_start_buffering_in(%d)\n", who_am_i(), f_in);
! 1325:
! 1326: if (iobuf.in.buf) {
! 1327: if (iobuf.in_fd == -1)
! 1328: iobuf.in_fd = f_in;
! 1329: else
! 1330: assert(f_in == iobuf.in_fd);
! 1331: return False;
! 1332: }
! 1333:
! 1334: alloc_xbuf(&iobuf.in, ROUND_UP_1024(IO_BUFFER_SIZE));
! 1335: iobuf.in_fd = f_in;
! 1336:
! 1337: return True;
1.1 misho 1338: }
1339:
1.1.1.2 ! misho 1340: void io_end_buffering_in(BOOL free_buffers)
1.1 misho 1341: {
1.1.1.2 ! misho 1342: if (msgs2stderr && DEBUG_GTE(IO, 2)) {
! 1343: rprintf(FINFO, "[%s] io_end_buffering_in(IOBUF_%s_BUFS)\n",
! 1344: who_am_i(), free_buffers ? "FREE" : "KEEP");
1.1 misho 1345: }
1346:
1.1.1.2 ! misho 1347: if (free_buffers)
! 1348: free_xbuf(&iobuf.in);
! 1349: else
! 1350: iobuf.in.pos = iobuf.in.len = 0;
! 1351:
! 1352: iobuf.in_fd = -1;
1.1 misho 1353: }
1354:
1.1.1.2 ! misho 1355: void io_end_buffering_out(BOOL free_buffers)
1.1 misho 1356: {
1.1.1.2 ! misho 1357: if (msgs2stderr && DEBUG_GTE(IO, 2)) {
! 1358: rprintf(FINFO, "[%s] io_end_buffering_out(IOBUF_%s_BUFS)\n",
! 1359: who_am_i(), free_buffers ? "FREE" : "KEEP");
! 1360: }
! 1361:
1.1 misho 1362: io_flush(FULL_FLUSH);
1.1.1.2 ! misho 1363:
! 1364: if (free_buffers) {
! 1365: free_xbuf(&iobuf.out);
! 1366: free_xbuf(&iobuf.msg);
! 1367: }
! 1368:
! 1369: iobuf.out_fd = -1;
1.1 misho 1370: }
1371:
1372: void maybe_flush_socket(int important)
1373: {
1.1.1.2 ! misho 1374: if (flist_eof && iobuf.out.buf && iobuf.out.len > iobuf.out_empty_len
1.1 misho 1375: && (important || time(NULL) - last_io_out >= 5))
1376: io_flush(NORMAL_FLUSH);
1377: }
1378:
1.1.1.2 ! misho 1379: /* Older rsync versions used to send either a MSG_NOOP (protocol 30) or a
! 1380: * raw-data-based keep-alive (protocol 29), both of which implied forwarding of
! 1381: * the message through the sender. Since the new timeout method does not need
! 1382: * any forwarding, we just send an empty MSG_DATA message, which works with all
! 1383: * rsync versions. This avoids any message forwarding, and leaves the raw-data
! 1384: * stream alone (since we can never be quite sure if that stream is in the
! 1385: * right state for a keep-alive message). */
! 1386: void maybe_send_keepalive(time_t now, int flags)
! 1387: {
! 1388: if (flags & MSK_ACTIVE_RECEIVER)
! 1389: last_io_in = now; /* Fudge things when we're working hard on the files. */
! 1390:
! 1391: if (now - last_io_out >= allowed_lull) {
! 1392: /* The receiver is special: it only sends keep-alive messages if it is
! 1393: * actively receiving data. Otherwise, it lets the generator timeout. */
! 1394: if (am_receiver && now - last_io_in >= io_timeout)
! 1395: return;
! 1396:
! 1397: if (!iobuf.msg.len && iobuf.out.len == iobuf.out_empty_len)
! 1398: send_msg(MSG_DATA, "", 0, 0);
! 1399: if (!(flags & MSK_ALLOW_FLUSH)) {
! 1400: /* Let the caller worry about writing out the data. */
! 1401: } else if (iobuf.msg.len)
! 1402: perform_io(iobuf.msg.size - iobuf.msg.len + 1, PIO_NEED_MSGROOM);
! 1403: else if (iobuf.out.len > iobuf.out_empty_len)
1.1 misho 1404: io_flush(NORMAL_FLUSH);
1405: }
1406: }
1407:
1.1.1.2 ! misho 1408: void start_flist_forward(int ndx)
1.1 misho 1409: {
1.1.1.2 ! misho 1410: write_int(iobuf.out_fd, ndx);
! 1411: forward_flist_data = 1;
1.1 misho 1412: }
1413:
1414: void stop_flist_forward(void)
1415: {
1.1.1.2 ! misho 1416: forward_flist_data = 0;
1.1 misho 1417: }
1418:
1.1.1.2 ! misho 1419: /* Read a message from a multiplexed source. */
! 1420: static void read_a_msg(void)
1.1 misho 1421: {
1.1.1.2 ! misho 1422: char data[BIGPATHBUFLEN];
! 1423: int tag, val;
1.1 misho 1424: size_t msg_bytes;
1425:
1.1.1.2 ! misho 1426: /* This ensures that perform_io() does not try to do any message reading
! 1427: * until we've read all of the data for this message. We should also
! 1428: * try to avoid calling things that will cause data to be written via
! 1429: * perform_io() prior to this being reset to 1. */
! 1430: iobuf.in_multiplexed = -1;
1.1 misho 1431:
1.1.1.2 ! misho 1432: tag = raw_read_int();
1.1 misho 1433:
1.1.1.2 ! misho 1434: msg_bytes = tag & 0xFFFFFF;
! 1435: tag = (tag >> 24) - MPLEX_BASE;
1.1 misho 1436:
1.1.1.2 ! misho 1437: if (DEBUG_GTE(IO, 1) && msgs2stderr)
! 1438: rprintf(FINFO, "[%s] got msg=%d, len=%ld\n", who_am_i(), (int)tag, (long)msg_bytes);
1.1 misho 1439:
1.1.1.2 ! misho 1440: switch (tag) {
! 1441: case MSG_DATA:
! 1442: assert(iobuf.raw_input_ends_before == 0);
! 1443: /* Though this does not yet read the data, we do mark where in
! 1444: * the buffer the msg data will end once it is read. It is
! 1445: * possible that this points off the end of the buffer, in
! 1446: * which case the gradual reading of the input stream will
! 1447: * cause this value to wrap around and eventually become real. */
! 1448: if (msg_bytes)
! 1449: iobuf.raw_input_ends_before = iobuf.in.pos + msg_bytes;
! 1450: iobuf.in_multiplexed = 1;
! 1451: break;
! 1452: case MSG_STATS:
! 1453: if (msg_bytes != sizeof stats.total_read || !am_generator)
! 1454: goto invalid_msg;
! 1455: raw_read_buf((char*)&stats.total_read, sizeof stats.total_read);
! 1456: iobuf.in_multiplexed = 1;
! 1457: break;
! 1458: case MSG_REDO:
! 1459: if (msg_bytes != 4 || !am_generator)
! 1460: goto invalid_msg;
! 1461: val = raw_read_int();
! 1462: iobuf.in_multiplexed = 1;
! 1463: got_flist_entry_status(FES_REDO, val);
! 1464: break;
! 1465: case MSG_IO_ERROR:
! 1466: if (msg_bytes != 4)
! 1467: goto invalid_msg;
! 1468: val = raw_read_int();
! 1469: iobuf.in_multiplexed = 1;
! 1470: io_error |= val;
! 1471: if (am_receiver)
! 1472: send_msg_int(MSG_IO_ERROR, val);
! 1473: break;
! 1474: case MSG_IO_TIMEOUT:
! 1475: if (msg_bytes != 4 || am_server || am_generator)
! 1476: goto invalid_msg;
! 1477: val = raw_read_int();
! 1478: iobuf.in_multiplexed = 1;
! 1479: if (!io_timeout || io_timeout > val) {
! 1480: if (INFO_GTE(MISC, 2))
! 1481: rprintf(FINFO, "Setting --timeout=%d to match server\n", val);
! 1482: set_io_timeout(val);
! 1483: }
! 1484: break;
! 1485: case MSG_NOOP:
! 1486: /* Support protocol-30 keep-alive method. */
! 1487: if (msg_bytes != 0)
! 1488: goto invalid_msg;
! 1489: iobuf.in_multiplexed = 1;
! 1490: if (am_sender)
! 1491: maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
! 1492: break;
! 1493: case MSG_DELETED:
! 1494: if (msg_bytes >= sizeof data)
! 1495: goto overflow;
! 1496: if (am_generator) {
! 1497: raw_read_buf(data, msg_bytes);
! 1498: iobuf.in_multiplexed = 1;
! 1499: send_msg(MSG_DELETED, data, msg_bytes, 1);
1.1 misho 1500: break;
1.1.1.2 ! misho 1501: }
1.1 misho 1502: #ifdef ICONV_OPTION
1.1.1.2 ! misho 1503: if (ic_recv != (iconv_t)-1) {
! 1504: xbuf outbuf, inbuf;
! 1505: char ibuf[512];
! 1506: int add_null = 0;
! 1507: int flags = ICB_INCLUDE_BAD | ICB_INIT;
! 1508:
! 1509: INIT_CONST_XBUF(outbuf, data);
! 1510: INIT_XBUF(inbuf, ibuf, 0, (size_t)-1);
! 1511:
! 1512: while (msg_bytes) {
! 1513: size_t len = msg_bytes > sizeof ibuf - inbuf.len ? sizeof ibuf - inbuf.len : msg_bytes;
! 1514: raw_read_buf(ibuf + inbuf.len, len);
! 1515: inbuf.pos = 0;
! 1516: inbuf.len += len;
! 1517: if (!(msg_bytes -= len) && !ibuf[inbuf.len-1])
! 1518: inbuf.len--, add_null = 1;
! 1519: if (iconvbufs(ic_send, &inbuf, &outbuf, flags) < 0) {
! 1520: if (errno == E2BIG)
1.1 misho 1521: goto overflow;
1.1.1.2 ! misho 1522: /* Buffer ended with an incomplete char, so move the
! 1523: * bytes to the start of the buffer and continue. */
! 1524: memmove(ibuf, ibuf + inbuf.pos, inbuf.len);
1.1 misho 1525: }
1.1.1.2 ! misho 1526: flags &= ~ICB_INIT;
1.1 misho 1527: }
1.1.1.2 ! misho 1528: if (add_null) {
! 1529: if (outbuf.len == outbuf.size)
! 1530: goto overflow;
! 1531: outbuf.buf[outbuf.len++] = '\0';
1.1 misho 1532: }
1.1.1.2 ! misho 1533: msg_bytes = outbuf.len;
! 1534: } else
! 1535: #endif
! 1536: raw_read_buf(data, msg_bytes);
! 1537: iobuf.in_multiplexed = 1;
! 1538: /* A directory name was sent with the trailing null */
! 1539: if (msg_bytes > 0 && !data[msg_bytes-1])
! 1540: log_delete(data, S_IFDIR);
! 1541: else {
! 1542: data[msg_bytes] = '\0';
! 1543: log_delete(data, S_IFREG);
! 1544: }
! 1545: break;
! 1546: case MSG_SUCCESS:
! 1547: if (msg_bytes != 4) {
! 1548: invalid_msg:
! 1549: rprintf(FERROR, "invalid multi-message %d:%lu [%s%s]\n",
! 1550: tag, (unsigned long)msg_bytes, who_am_i(),
! 1551: inc_recurse ? "/inc" : "");
! 1552: exit_cleanup(RERR_STREAMIO);
! 1553: }
! 1554: val = raw_read_int();
! 1555: iobuf.in_multiplexed = 1;
! 1556: if (am_generator)
! 1557: got_flist_entry_status(FES_SUCCESS, val);
! 1558: else
! 1559: successful_send(val);
! 1560: break;
! 1561: case MSG_NO_SEND:
! 1562: if (msg_bytes != 4)
! 1563: goto invalid_msg;
! 1564: val = raw_read_int();
! 1565: iobuf.in_multiplexed = 1;
! 1566: if (am_generator)
! 1567: got_flist_entry_status(FES_NO_SEND, val);
! 1568: else
! 1569: send_msg_int(MSG_NO_SEND, val);
! 1570: break;
! 1571: case MSG_ERROR_SOCKET:
! 1572: case MSG_ERROR_UTF8:
! 1573: case MSG_CLIENT:
! 1574: case MSG_LOG:
! 1575: if (!am_generator)
! 1576: goto invalid_msg;
! 1577: if (tag == MSG_ERROR_SOCKET)
! 1578: msgs2stderr = 1;
! 1579: /* FALL THROUGH */
! 1580: case MSG_INFO:
! 1581: case MSG_ERROR:
! 1582: case MSG_ERROR_XFER:
! 1583: case MSG_WARNING:
! 1584: if (msg_bytes >= sizeof data) {
! 1585: overflow:
! 1586: rprintf(FERROR,
! 1587: "multiplexing overflow %d:%lu [%s%s]\n",
! 1588: tag, (unsigned long)msg_bytes, who_am_i(),
! 1589: inc_recurse ? "/inc" : "");
! 1590: exit_cleanup(RERR_STREAMIO);
! 1591: }
! 1592: raw_read_buf(data, msg_bytes);
! 1593: /* We don't set in_multiplexed value back to 1 before writing this message
! 1594: * because the write might loop back and read yet another message, over and
! 1595: * over again, while waiting for room to put the message in the msg buffer. */
! 1596: rwrite((enum logcode)tag, data, msg_bytes, !am_generator);
! 1597: iobuf.in_multiplexed = 1;
! 1598: if (first_message) {
! 1599: if (list_only && !am_sender && tag == 1 && msg_bytes < sizeof data) {
! 1600: data[msg_bytes] = '\0';
! 1601: check_for_d_option_error(data);
! 1602: }
! 1603: first_message = 0;
! 1604: }
! 1605: break;
! 1606: case MSG_ERROR_EXIT:
! 1607: if (msg_bytes == 4)
! 1608: val = raw_read_int();
! 1609: else if (msg_bytes == 0)
! 1610: val = 0;
! 1611: else
! 1612: goto invalid_msg;
! 1613: iobuf.in_multiplexed = 1;
! 1614: if (DEBUG_GTE(EXIT, 3))
! 1615: rprintf(FINFO, "[%s] got MSG_ERROR_EXIT with %ld bytes\n", who_am_i(), (long)msg_bytes);
! 1616: if (msg_bytes == 0) {
! 1617: if (!am_sender && !am_generator) {
! 1618: if (DEBUG_GTE(EXIT, 3)) {
! 1619: rprintf(FINFO, "[%s] sending MSG_ERROR_EXIT (len 0)\n",
! 1620: who_am_i());
! 1621: }
! 1622: send_msg(MSG_ERROR_EXIT, "", 0, 0);
! 1623: io_flush(FULL_FLUSH);
1.1 misho 1624: }
1.1.1.2 ! misho 1625: } else if (protocol_version >= 31) {
! 1626: if (am_generator || am_receiver) {
! 1627: if (DEBUG_GTE(EXIT, 3)) {
! 1628: rprintf(FINFO, "[%s] sending MSG_ERROR_EXIT with exit_code %d\n",
! 1629: who_am_i(), val);
1.1 misho 1630: }
1.1.1.2 ! misho 1631: send_msg_int(MSG_ERROR_EXIT, val);
! 1632: } else {
! 1633: if (DEBUG_GTE(EXIT, 3)) {
! 1634: rprintf(FINFO, "[%s] sending MSG_ERROR_EXIT (len 0)\n",
! 1635: who_am_i());
! 1636: }
! 1637: send_msg(MSG_ERROR_EXIT, "", 0, 0);
1.1 misho 1638: }
1639: }
1.1.1.2 ! misho 1640: /* Send a negative linenum so that we don't end up
! 1641: * with a duplicate exit message. */
! 1642: _exit_cleanup(val, __FILE__, 0 - __LINE__);
! 1643: default:
! 1644: rprintf(FERROR, "unexpected tag %d [%s%s]\n",
! 1645: tag, who_am_i(), inc_recurse ? "/inc" : "");
! 1646: exit_cleanup(RERR_STREAMIO);
1.1 misho 1647: }
1648:
1.1.1.2 ! misho 1649: assert(iobuf.in_multiplexed > 0);
1.1 misho 1650: }
1651:
1.1.1.2 ! misho 1652: static void drain_multiplex_messages(void)
1.1 misho 1653: {
1.1.1.2 ! misho 1654: while (IN_MULTIPLEXED_AND_READY && iobuf.in.len) {
! 1655: if (iobuf.raw_input_ends_before) {
! 1656: size_t raw_len = iobuf.raw_input_ends_before - iobuf.in.pos;
! 1657: iobuf.raw_input_ends_before = 0;
! 1658: if (raw_len >= iobuf.in.len) {
! 1659: iobuf.in.len = 0;
! 1660: break;
! 1661: }
! 1662: iobuf.in.len -= raw_len;
! 1663: if ((iobuf.in.pos += raw_len) >= iobuf.in.size)
! 1664: iobuf.in.pos -= iobuf.in.size;
! 1665: }
! 1666: read_a_msg();
1.1 misho 1667: }
1.1.1.2 ! misho 1668: }
1.1 misho 1669:
1.1.1.2 ! misho 1670: void wait_for_receiver(void)
! 1671: {
! 1672: if (!iobuf.raw_input_ends_before)
! 1673: read_a_msg();
1.1 misho 1674:
1.1.1.2 ! misho 1675: if (iobuf.raw_input_ends_before) {
! 1676: int ndx = read_int(iobuf.in_fd);
! 1677: if (ndx < 0) {
! 1678: switch (ndx) {
! 1679: case NDX_FLIST_EOF:
! 1680: flist_eof = 1;
! 1681: if (DEBUG_GTE(FLIST, 3))
! 1682: rprintf(FINFO, "[%s] flist_eof=1\n", who_am_i());
! 1683: break;
! 1684: case NDX_DONE:
! 1685: msgdone_cnt++;
! 1686: break;
! 1687: default:
! 1688: exit_cleanup(RERR_STREAMIO);
! 1689: }
! 1690: } else {
! 1691: struct file_list *flist;
! 1692: flist_receiving_enabled = False;
! 1693: if (DEBUG_GTE(FLIST, 2)) {
! 1694: rprintf(FINFO, "[%s] receiving flist for dir %d\n",
! 1695: who_am_i(), ndx);
! 1696: }
! 1697: flist = recv_file_list(iobuf.in_fd);
! 1698: flist->parent_ndx = ndx;
! 1699: #ifdef SUPPORT_HARD_LINKS
! 1700: if (preserve_hard_links)
! 1701: match_hard_links(flist);
! 1702: #endif
! 1703: flist_receiving_enabled = True;
! 1704: }
! 1705: }
1.1 misho 1706: }
1707:
1708: unsigned short read_shortint(int f)
1709: {
1710: char b[2];
1.1.1.2 ! misho 1711: read_buf(f, b, 2);
1.1 misho 1712: return (UVAL(b, 1) << 8) + UVAL(b, 0);
1713: }
1714:
1715: int32 read_int(int f)
1716: {
1717: char b[4];
1718: int32 num;
1719:
1.1.1.2 ! misho 1720: read_buf(f, b, 4);
1.1 misho 1721: num = IVAL(b, 0);
1722: #if SIZEOF_INT32 > 4
1723: if (num & (int32)0x80000000)
1724: num |= ~(int32)0xffffffff;
1725: #endif
1726: return num;
1727: }
1728:
1729: int32 read_varint(int f)
1730: {
1731: union {
1.1.1.2 ! misho 1732: char b[5];
! 1733: int32 x;
1.1 misho 1734: } u;
1735: uchar ch;
1736: int extra;
1737:
1738: u.x = 0;
1.1.1.2 ! misho 1739: ch = read_byte(f);
1.1 misho 1740: extra = int_byte_extra[ch / 4];
1741: if (extra) {
1742: uchar bit = ((uchar)1<<(8-extra));
1743: if (extra >= (int)sizeof u.b) {
1744: rprintf(FERROR, "Overflow in read_varint()\n");
1745: exit_cleanup(RERR_STREAMIO);
1746: }
1.1.1.2 ! misho 1747: read_buf(f, u.b, extra);
1.1 misho 1748: u.b[extra] = ch & (bit-1);
1749: } else
1750: u.b[0] = ch;
1751: #if CAREFUL_ALIGNMENT
1752: u.x = IVAL(u.b,0);
1753: #endif
1754: #if SIZEOF_INT32 > 4
1755: if (u.x & (int32)0x80000000)
1756: u.x |= ~(int32)0xffffffff;
1757: #endif
1758: return u.x;
1759: }
1760:
1761: int64 read_varlong(int f, uchar min_bytes)
1762: {
1763: union {
1.1.1.2 ! misho 1764: char b[9];
! 1765: int64 x;
1.1 misho 1766: } u;
1767: char b2[8];
1768: int extra;
1769:
1770: #if SIZEOF_INT64 < 8
1771: memset(u.b, 0, 8);
1772: #else
1773: u.x = 0;
1774: #endif
1.1.1.2 ! misho 1775: read_buf(f, b2, min_bytes);
1.1 misho 1776: memcpy(u.b, b2+1, min_bytes-1);
1777: extra = int_byte_extra[CVAL(b2, 0) / 4];
1778: if (extra) {
1779: uchar bit = ((uchar)1<<(8-extra));
1780: if (min_bytes + extra > (int)sizeof u.b) {
1781: rprintf(FERROR, "Overflow in read_varlong()\n");
1782: exit_cleanup(RERR_STREAMIO);
1783: }
1.1.1.2 ! misho 1784: read_buf(f, u.b + min_bytes - 1, extra);
1.1 misho 1785: u.b[min_bytes + extra - 1] = CVAL(b2, 0) & (bit-1);
1786: #if SIZEOF_INT64 < 8
1787: if (min_bytes + extra > 5 || u.b[4] || CVAL(u.b,3) & 0x80) {
1788: rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n");
1789: exit_cleanup(RERR_UNSUPPORTED);
1790: }
1791: #endif
1792: } else
1793: u.b[min_bytes + extra - 1] = CVAL(b2, 0);
1794: #if SIZEOF_INT64 < 8
1795: u.x = IVAL(u.b,0);
1796: #elif CAREFUL_ALIGNMENT
1797: u.x = IVAL(u.b,0) | (((int64)IVAL(u.b,4))<<32);
1798: #endif
1799: return u.x;
1800: }
1801:
1802: int64 read_longint(int f)
1803: {
1804: #if SIZEOF_INT64 >= 8
1805: char b[9];
1806: #endif
1807: int32 num = read_int(f);
1808:
1809: if (num != (int32)0xffffffff)
1810: return num;
1811:
1812: #if SIZEOF_INT64 < 8
1813: rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n");
1814: exit_cleanup(RERR_UNSUPPORTED);
1815: #else
1.1.1.2 ! misho 1816: read_buf(f, b, 8);
1.1 misho 1817: return IVAL(b,0) | (((int64)IVAL(b,4))<<32);
1818: #endif
1819: }
1820:
1821: void read_buf(int f, char *buf, size_t len)
1822: {
1.1.1.2 ! misho 1823: if (f != iobuf.in_fd) {
! 1824: if (safe_read(f, buf, len) != len)
! 1825: whine_about_eof(False); /* Doesn't return. */
! 1826: goto batch_copy;
! 1827: }
! 1828:
! 1829: if (!IN_MULTIPLEXED) {
! 1830: raw_read_buf(buf, len);
! 1831: total_data_read += len;
! 1832: if (forward_flist_data)
! 1833: write_buf(iobuf.out_fd, buf, len);
! 1834: batch_copy:
! 1835: if (f == write_batch_monitor_in)
! 1836: safe_write(batch_fd, buf, len);
! 1837: return;
! 1838: }
! 1839:
! 1840: while (1) {
! 1841: size_t siz;
! 1842:
! 1843: while (!iobuf.raw_input_ends_before)
! 1844: read_a_msg();
! 1845:
! 1846: siz = MIN(len, iobuf.raw_input_ends_before - iobuf.in.pos);
! 1847: if (siz >= iobuf.in.size)
! 1848: siz = iobuf.in.size;
! 1849: raw_read_buf(buf, siz);
! 1850: total_data_read += siz;
! 1851:
! 1852: if (forward_flist_data)
! 1853: write_buf(iobuf.out_fd, buf, siz);
! 1854:
! 1855: if (f == write_batch_monitor_in)
! 1856: safe_write(batch_fd, buf, siz);
! 1857:
! 1858: if ((len -= siz) == 0)
! 1859: break;
! 1860: buf += siz;
! 1861: }
1.1 misho 1862: }
1863:
1864: void read_sbuf(int f, char *buf, size_t len)
1865: {
1.1.1.2 ! misho 1866: read_buf(f, buf, len);
1.1 misho 1867: buf[len] = '\0';
1868: }
1869:
1870: uchar read_byte(int f)
1871: {
1872: uchar c;
1.1.1.2 ! misho 1873: read_buf(f, (char*)&c, 1);
1.1 misho 1874: return c;
1875: }
1876:
1877: int read_vstring(int f, char *buf, int bufsize)
1878: {
1879: int len = read_byte(f);
1880:
1881: if (len & 0x80)
1882: len = (len & ~0x80) * 0x100 + read_byte(f);
1883:
1884: if (len >= bufsize) {
1885: rprintf(FERROR, "over-long vstring received (%d > %d)\n",
1886: len, bufsize - 1);
1887: return -1;
1888: }
1889:
1890: if (len)
1.1.1.2 ! misho 1891: read_buf(f, buf, len);
1.1 misho 1892: buf[len] = '\0';
1893: return len;
1894: }
1895:
1896: /* Populate a sum_struct with values from the socket. This is
1897: * called by both the sender and the receiver. */
1898: void read_sum_head(int f, struct sum_struct *sum)
1899: {
1900: int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
1901: sum->count = read_int(f);
1902: if (sum->count < 0) {
1903: rprintf(FERROR, "Invalid checksum count %ld [%s]\n",
1904: (long)sum->count, who_am_i());
1905: exit_cleanup(RERR_PROTOCOL);
1906: }
1907: sum->blength = read_int(f);
1908: if (sum->blength < 0 || sum->blength > max_blength) {
1909: rprintf(FERROR, "Invalid block length %ld [%s]\n",
1910: (long)sum->blength, who_am_i());
1911: exit_cleanup(RERR_PROTOCOL);
1912: }
1913: sum->s2length = protocol_version < 27 ? csum_length : (int)read_int(f);
1914: if (sum->s2length < 0 || sum->s2length > MAX_DIGEST_LEN) {
1915: rprintf(FERROR, "Invalid checksum length %d [%s]\n",
1916: sum->s2length, who_am_i());
1917: exit_cleanup(RERR_PROTOCOL);
1918: }
1919: sum->remainder = read_int(f);
1920: if (sum->remainder < 0 || sum->remainder > sum->blength) {
1921: rprintf(FERROR, "Invalid remainder length %ld [%s]\n",
1922: (long)sum->remainder, who_am_i());
1923: exit_cleanup(RERR_PROTOCOL);
1924: }
1925: }
1926:
1927: /* Send the values from a sum_struct over the socket. Set sum to
1928: * NULL if there are no checksums to send. This is called by both
1929: * the generator and the sender. */
1930: void write_sum_head(int f, struct sum_struct *sum)
1931: {
1932: static struct sum_struct null_sum;
1933:
1934: if (sum == NULL)
1935: sum = &null_sum;
1936:
1937: write_int(f, sum->count);
1938: write_int(f, sum->blength);
1939: if (protocol_version >= 27)
1940: write_int(f, sum->s2length);
1941: write_int(f, sum->remainder);
1942: }
1943:
1.1.1.2 ! misho 1944: /* Sleep after writing to limit I/O bandwidth usage.
1.1 misho 1945: *
1946: * @todo Rather than sleeping after each write, it might be better to
1947: * use some kind of averaging. The current algorithm seems to always
1948: * use a bit less bandwidth than specified, because it doesn't make up
1949: * for slow periods. But arguably this is a feature. In addition, we
1950: * ought to take the time used to write the data into account.
1951: *
1952: * During some phases of big transfers (file FOO is uptodate) this is
1953: * called with a small bytes_written every time. As the kernel has to
1954: * round small waits up to guarantee that we actually wait at least the
1955: * requested number of microseconds, this can become grossly inaccurate.
1956: * We therefore keep track of the bytes we've written over time and only
1.1.1.2 ! misho 1957: * sleep when the accumulated delay is at least 1 tenth of a second. */
1.1 misho 1958: static void sleep_for_bwlimit(int bytes_written)
1959: {
1960: static struct timeval prior_tv;
1961: static long total_written = 0;
1962: struct timeval tv, start_tv;
1963: long elapsed_usec, sleep_usec;
1964:
1965: #define ONE_SEC 1000000L /* # of microseconds in a second */
1966:
1967: total_written += bytes_written;
1968:
1969: gettimeofday(&start_tv, NULL);
1970: if (prior_tv.tv_sec) {
1971: elapsed_usec = (start_tv.tv_sec - prior_tv.tv_sec) * ONE_SEC
1972: + (start_tv.tv_usec - prior_tv.tv_usec);
1973: total_written -= (int64)elapsed_usec * bwlimit / (ONE_SEC/1024);
1974: if (total_written < 0)
1975: total_written = 0;
1976: }
1977:
1978: sleep_usec = total_written * (ONE_SEC/1024) / bwlimit;
1979: if (sleep_usec < ONE_SEC / 10) {
1980: prior_tv = start_tv;
1981: return;
1982: }
1983:
1984: tv.tv_sec = sleep_usec / ONE_SEC;
1985: tv.tv_usec = sleep_usec % ONE_SEC;
1986: select(0, NULL, NULL, NULL, &tv);
1987:
1988: gettimeofday(&prior_tv, NULL);
1989: elapsed_usec = (prior_tv.tv_sec - start_tv.tv_sec) * ONE_SEC
1990: + (prior_tv.tv_usec - start_tv.tv_usec);
1991: total_written = (sleep_usec - elapsed_usec) * bwlimit / (ONE_SEC/1024);
1992: }
1993:
1.1.1.2 ! misho 1994: void io_flush(int flush_it_all)
1.1 misho 1995: {
1.1.1.2 ! misho 1996: if (iobuf.out.len > iobuf.out_empty_len) {
! 1997: if (flush_it_all) /* FULL_FLUSH: flush everything in the output buffers */
! 1998: perform_io(iobuf.out.size - iobuf.out_empty_len, PIO_NEED_OUTROOM);
! 1999: else /* NORMAL_FLUSH: flush at least 1 byte */
! 2000: perform_io(iobuf.out.size - iobuf.out.len + 1, PIO_NEED_OUTROOM);
1.1 misho 2001: }
1.1.1.2 ! misho 2002: if (iobuf.msg.len)
! 2003: perform_io(iobuf.msg.size, PIO_NEED_MSGROOM);
1.1 misho 2004: }
2005:
2006: void write_shortint(int f, unsigned short x)
2007: {
2008: char b[2];
2009: b[0] = (char)x;
2010: b[1] = (char)(x >> 8);
1.1.1.2 ! misho 2011: write_buf(f, b, 2);
1.1 misho 2012: }
2013:
2014: void write_int(int f, int32 x)
2015: {
2016: char b[4];
2017: SIVAL(b, 0, x);
1.1.1.2 ! misho 2018: write_buf(f, b, 4);
1.1 misho 2019: }
2020:
2021: void write_varint(int f, int32 x)
2022: {
2023: char b[5];
2024: uchar bit;
2025: int cnt = 4;
2026:
2027: SIVAL(b, 1, x);
2028:
2029: while (cnt > 1 && b[cnt] == 0)
2030: cnt--;
2031: bit = ((uchar)1<<(7-cnt+1));
2032: if (CVAL(b, cnt) >= bit) {
2033: cnt++;
2034: *b = ~(bit-1);
2035: } else if (cnt > 1)
2036: *b = b[cnt] | ~(bit*2-1);
2037: else
2038: *b = b[cnt];
2039:
1.1.1.2 ! misho 2040: write_buf(f, b, cnt);
1.1 misho 2041: }
2042:
2043: void write_varlong(int f, int64 x, uchar min_bytes)
2044: {
2045: char b[9];
2046: uchar bit;
2047: int cnt = 8;
2048:
2049: SIVAL(b, 1, x);
2050: #if SIZEOF_INT64 >= 8
2051: SIVAL(b, 5, x >> 32);
2052: #else
2053: if (x <= 0x7FFFFFFF && x >= 0)
2054: memset(b + 5, 0, 4);
2055: else {
2056: rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n");
2057: exit_cleanup(RERR_UNSUPPORTED);
2058: }
2059: #endif
2060:
2061: while (cnt > min_bytes && b[cnt] == 0)
2062: cnt--;
2063: bit = ((uchar)1<<(7-cnt+min_bytes));
2064: if (CVAL(b, cnt) >= bit) {
2065: cnt++;
2066: *b = ~(bit-1);
2067: } else if (cnt > min_bytes)
2068: *b = b[cnt] | ~(bit*2-1);
2069: else
2070: *b = b[cnt];
2071:
1.1.1.2 ! misho 2072: write_buf(f, b, cnt);
1.1 misho 2073: }
2074:
2075: /*
2076: * Note: int64 may actually be a 32-bit type if ./configure couldn't find any
2077: * 64-bit types on this platform.
2078: */
2079: void write_longint(int f, int64 x)
2080: {
2081: char b[12], * const s = b+4;
2082:
2083: SIVAL(s, 0, x);
2084: if (x <= 0x7FFFFFFF && x >= 0) {
1.1.1.2 ! misho 2085: write_buf(f, s, 4);
1.1 misho 2086: return;
2087: }
2088:
2089: #if SIZEOF_INT64 < 8
2090: rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n");
2091: exit_cleanup(RERR_UNSUPPORTED);
2092: #else
2093: memset(b, 0xFF, 4);
2094: SIVAL(s, 4, x >> 32);
1.1.1.2 ! misho 2095: write_buf(f, b, 12);
1.1 misho 2096: #endif
2097: }
2098:
2099: void write_buf(int f, const char *buf, size_t len)
2100: {
1.1.1.2 ! misho 2101: size_t pos, siz;
! 2102:
! 2103: if (f != iobuf.out_fd) {
! 2104: safe_write(f, buf, len);
! 2105: goto batch_copy;
! 2106: }
! 2107:
! 2108: if (iobuf.out.len + len > iobuf.out.size)
! 2109: perform_io(len, PIO_NEED_OUTROOM);
! 2110:
! 2111: pos = iobuf.out.pos + iobuf.out.len; /* Must be set after any flushing. */
! 2112: if (pos >= iobuf.out.size)
! 2113: pos -= iobuf.out.size;
! 2114:
! 2115: /* Handle a split copy if we wrap around the end of the circular buffer. */
! 2116: if (pos >= iobuf.out.pos && (siz = iobuf.out.size - pos) < len) {
! 2117: memcpy(iobuf.out.buf + pos, buf, siz);
! 2118: memcpy(iobuf.out.buf, buf + siz, len - siz);
! 2119: } else
! 2120: memcpy(iobuf.out.buf + pos, buf, len);
! 2121:
! 2122: iobuf.out.len += len;
! 2123: total_data_written += len;
! 2124:
! 2125: batch_copy:
! 2126: if (f == write_batch_monitor_out)
! 2127: safe_write(batch_fd, buf, len);
1.1 misho 2128: }
2129:
1.1.1.2 ! misho 2130: /* Write a string to the connection */
1.1 misho 2131: void write_sbuf(int f, const char *buf)
2132: {
1.1.1.2 ! misho 2133: write_buf(f, buf, strlen(buf));
1.1 misho 2134: }
2135:
2136: void write_byte(int f, uchar c)
2137: {
1.1.1.2 ! misho 2138: write_buf(f, (char *)&c, 1);
1.1 misho 2139: }
2140:
2141: void write_vstring(int f, const char *str, int len)
2142: {
2143: uchar lenbuf[3], *lb = lenbuf;
2144:
2145: if (len > 0x7F) {
2146: if (len > 0x7FFF) {
2147: rprintf(FERROR,
2148: "attempting to send over-long vstring (%d > %d)\n",
2149: len, 0x7FFF);
2150: exit_cleanup(RERR_PROTOCOL);
2151: }
2152: *lb++ = len / 0x100 + 0x80;
2153: }
2154: *lb = len;
2155:
1.1.1.2 ! misho 2156: write_buf(f, (char*)lenbuf, lb - lenbuf + 1);
1.1 misho 2157: if (len)
1.1.1.2 ! misho 2158: write_buf(f, str, len);
1.1 misho 2159: }
2160:
2161: /* Send a file-list index using a byte-reduction method. */
2162: void write_ndx(int f, int32 ndx)
2163: {
2164: static int32 prev_positive = -1, prev_negative = 1;
2165: int32 diff, cnt = 0;
2166: char b[6];
2167:
2168: if (protocol_version < 30 || read_batch) {
2169: write_int(f, ndx);
2170: return;
2171: }
2172:
2173: /* Send NDX_DONE as a single-byte 0 with no side effects. Send
2174: * negative nums as a positive after sending a leading 0xFF. */
2175: if (ndx >= 0) {
2176: diff = ndx - prev_positive;
2177: prev_positive = ndx;
2178: } else if (ndx == NDX_DONE) {
2179: *b = 0;
1.1.1.2 ! misho 2180: write_buf(f, b, 1);
1.1 misho 2181: return;
2182: } else {
2183: b[cnt++] = (char)0xFF;
2184: ndx = -ndx;
2185: diff = ndx - prev_negative;
2186: prev_negative = ndx;
2187: }
2188:
2189: /* A diff of 1 - 253 is sent as a one-byte diff; a diff of 254 - 32767
2190: * or 0 is sent as a 0xFE + a two-byte diff; otherwise we send 0xFE
2191: * & all 4 bytes of the (non-negative) num with the high-bit set. */
2192: if (diff < 0xFE && diff > 0)
2193: b[cnt++] = (char)diff;
2194: else if (diff < 0 || diff > 0x7FFF) {
2195: b[cnt++] = (char)0xFE;
2196: b[cnt++] = (char)((ndx >> 24) | 0x80);
2197: b[cnt++] = (char)ndx;
2198: b[cnt++] = (char)(ndx >> 8);
2199: b[cnt++] = (char)(ndx >> 16);
2200: } else {
2201: b[cnt++] = (char)0xFE;
2202: b[cnt++] = (char)(diff >> 8);
2203: b[cnt++] = (char)diff;
2204: }
1.1.1.2 ! misho 2205: write_buf(f, b, cnt);
1.1 misho 2206: }
2207:
2208: /* Receive a file-list index using a byte-reduction method. */
2209: int32 read_ndx(int f)
2210: {
2211: static int32 prev_positive = -1, prev_negative = 1;
2212: int32 *prev_ptr, num;
2213: char b[4];
2214:
2215: if (protocol_version < 30)
2216: return read_int(f);
2217:
1.1.1.2 ! misho 2218: read_buf(f, b, 1);
1.1 misho 2219: if (CVAL(b, 0) == 0xFF) {
1.1.1.2 ! misho 2220: read_buf(f, b, 1);
1.1 misho 2221: prev_ptr = &prev_negative;
2222: } else if (CVAL(b, 0) == 0)
2223: return NDX_DONE;
2224: else
2225: prev_ptr = &prev_positive;
2226: if (CVAL(b, 0) == 0xFE) {
1.1.1.2 ! misho 2227: read_buf(f, b, 2);
1.1 misho 2228: if (CVAL(b, 0) & 0x80) {
2229: b[3] = CVAL(b, 0) & ~0x80;
2230: b[0] = b[1];
1.1.1.2 ! misho 2231: read_buf(f, b+1, 2);
1.1 misho 2232: num = IVAL(b, 0);
2233: } else
2234: num = (UVAL(b,0)<<8) + UVAL(b,1) + *prev_ptr;
2235: } else
2236: num = UVAL(b, 0) + *prev_ptr;
2237: *prev_ptr = num;
2238: if (prev_ptr == &prev_negative)
2239: num = -num;
2240: return num;
2241: }
2242:
2243: /* Read a line of up to bufsiz-1 characters into buf. Strips
2244: * the (required) trailing newline and all carriage returns.
2245: * Returns 1 for success; 0 for I/O error or truncation. */
1.1.1.2 ! misho 2246: int read_line_old(int fd, char *buf, size_t bufsiz, int eof_ok)
1.1 misho 2247: {
1.1.1.2 ! misho 2248: assert(fd != iobuf.in_fd);
1.1 misho 2249: bufsiz--; /* leave room for the null */
2250: while (bufsiz > 0) {
1.1.1.2 ! misho 2251: if (safe_read(fd, buf, 1) == 0) {
! 2252: if (eof_ok)
! 2253: break;
1.1 misho 2254: return 0;
1.1.1.2 ! misho 2255: }
! 2256: if (*buf == '\0')
! 2257: return 0;
! 2258: if (*buf == '\n')
1.1 misho 2259: break;
1.1.1.2 ! misho 2260: if (*buf != '\r') {
1.1 misho 2261: buf++;
2262: bufsiz--;
2263: }
2264: }
2265: *buf = '\0';
2266: return bufsiz > 0;
2267: }
2268:
2269: void io_printf(int fd, const char *format, ...)
2270: {
2271: va_list ap;
2272: char buf[BIGPATHBUFLEN];
2273: int len;
2274:
2275: va_start(ap, format);
2276: len = vsnprintf(buf, sizeof buf, format, ap);
2277: va_end(ap);
2278:
2279: if (len < 0)
1.1.1.2 ! misho 2280: exit_cleanup(RERR_PROTOCOL);
1.1 misho 2281:
2282: if (len > (int)sizeof buf) {
2283: rprintf(FERROR, "io_printf() was too long for the buffer.\n");
1.1.1.2 ! misho 2284: exit_cleanup(RERR_PROTOCOL);
1.1 misho 2285: }
2286:
2287: write_sbuf(fd, buf);
2288: }
2289:
1.1.1.2 ! misho 2290: /* Setup for multiplexing a MSG_* stream with the data stream. */
! 2291: void io_start_multiplex_out(int fd)
1.1 misho 2292: {
1.1.1.2 ! misho 2293: io_flush(FULL_FLUSH);
1.1 misho 2294:
1.1.1.2 ! misho 2295: if (msgs2stderr && DEBUG_GTE(IO, 2))
! 2296: rprintf(FINFO, "[%s] io_start_multiplex_out(%d)\n", who_am_i(), fd);
! 2297:
! 2298: if (!iobuf.msg.buf)
! 2299: alloc_xbuf(&iobuf.msg, ROUND_UP_1024(IO_BUFFER_SIZE));
! 2300:
! 2301: iobuf.out_empty_len = 4; /* See also OUT_MULTIPLEXED */
! 2302: io_start_buffering_out(fd);
! 2303: got_kill_signal = 0;
! 2304:
! 2305: iobuf.raw_data_header_pos = iobuf.out.pos + iobuf.out.len;
! 2306: iobuf.out.len += 4;
1.1 misho 2307: }
2308:
1.1.1.2 ! misho 2309: /* Setup for multiplexing a MSG_* stream with the data stream. */
! 2310: void io_start_multiplex_in(int fd)
1.1 misho 2311: {
1.1.1.2 ! misho 2312: if (msgs2stderr && DEBUG_GTE(IO, 2))
! 2313: rprintf(FINFO, "[%s] io_start_multiplex_in(%d)\n", who_am_i(), fd);
! 2314:
! 2315: iobuf.in_multiplexed = 1; /* See also IN_MULTIPLEXED */
! 2316: io_start_buffering_in(fd);
1.1 misho 2317: }
2318:
1.1.1.2 ! misho 2319: int io_end_multiplex_in(int mode)
1.1 misho 2320: {
1.1.1.2 ! misho 2321: int ret = iobuf.in_multiplexed ? iobuf.in_fd : -1;
! 2322:
! 2323: if (msgs2stderr && DEBUG_GTE(IO, 2))
! 2324: rprintf(FINFO, "[%s] io_end_multiplex_in(mode=%d)\n", who_am_i(), mode);
! 2325:
! 2326: iobuf.in_multiplexed = 0;
! 2327: if (mode == MPLX_SWITCHING)
! 2328: iobuf.raw_input_ends_before = 0;
! 2329: else
! 2330: assert(iobuf.raw_input_ends_before == 0);
! 2331: if (mode != MPLX_TO_BUFFERED)
! 2332: io_end_buffering_in(mode);
! 2333:
! 2334: return ret;
1.1 misho 2335: }
2336:
1.1.1.2 ! misho 2337: int io_end_multiplex_out(int mode)
1.1 misho 2338: {
1.1.1.2 ! misho 2339: int ret = iobuf.out_empty_len ? iobuf.out_fd : -1;
! 2340:
! 2341: if (msgs2stderr && DEBUG_GTE(IO, 2))
! 2342: rprintf(FINFO, "[%s] io_end_multiplex_out(mode=%d)\n", who_am_i(), mode);
! 2343:
! 2344: if (mode != MPLX_TO_BUFFERED)
! 2345: io_end_buffering_out(mode);
! 2346: else
! 2347: io_flush(FULL_FLUSH);
! 2348:
! 2349: iobuf.out.len = 0;
! 2350: iobuf.out_empty_len = 0;
! 2351: if (got_kill_signal > 0) /* Just in case... */
! 2352: handle_kill_signal(False);
! 2353: got_kill_signal = -1;
! 2354:
! 2355: return ret;
1.1 misho 2356: }
2357:
2358: void start_write_batch(int fd)
2359: {
2360: /* Some communication has already taken place, but we don't
2361: * enable batch writing until here so that we can write a
2362: * canonical record of the communication even though the
2363: * actual communication so far depends on whether a daemon
2364: * is involved. */
2365: write_int(batch_fd, protocol_version);
2366: if (protocol_version >= 30)
2367: write_byte(batch_fd, compat_flags);
2368: write_int(batch_fd, checksum_seed);
2369:
2370: if (am_sender)
2371: write_batch_monitor_out = fd;
2372: else
2373: write_batch_monitor_in = fd;
2374: }
2375:
2376: void stop_write_batch(void)
2377: {
2378: write_batch_monitor_out = -1;
2379: write_batch_monitor_in = -1;
2380: }
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