Annotation of embedaddon/rsync/cleanup.c, revision 1.1.1.2
1.1 misho 1: /*
2: * End-of-run cleanup routines.
3: *
4: * Copyright (C) 1996-2000 Andrew Tridgell
5: * Copyright (C) 1996 Paul Mackerras
6: * Copyright (C) 2002 Martin Pool
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: #include "rsync.h"
24:
25: extern int am_server;
26: extern int am_daemon;
27: extern int am_receiver;
28: extern int io_error;
29: extern int keep_partial;
30: extern int got_xfer_error;
1.1.1.2 ! misho 31: extern int protocol_version;
! 32: extern int output_needs_newline;
1.1 misho 33: extern char *partial_dir;
34: extern char *logfile_name;
35:
1.1.1.2 ! misho 36: BOOL shutting_down = False;
! 37: BOOL flush_ok_after_signal = False;
! 38:
1.1 misho 39: #ifdef HAVE_SIGACTION
40: static struct sigaction sigact;
41: #endif
42:
43: /**
44: * Close all open sockets and files, allowing a (somewhat) graceful
45: * shutdown() of socket connections. This eliminates the abortive
46: * TCP RST sent by a Winsock-based system when the close() occurs.
47: **/
48: void close_all(void)
49: {
50: #ifdef SHUTDOWN_ALL_SOCKETS
51: int max_fd;
52: int fd;
53: int ret;
54: STRUCT_STAT st;
55:
56: max_fd = sysconf(_SC_OPEN_MAX) - 1;
57: for (fd = max_fd; fd >= 0; fd--) {
58: if ((ret = do_fstat(fd, &st)) == 0) {
59: if (is_a_socket(fd))
60: ret = shutdown(fd, 2);
61: ret = close(fd);
62: }
63: }
64: #endif
65: }
66:
67: /**
68: * @file cleanup.c
69: *
70: * Code for handling interrupted transfers. Depending on the @c
71: * --partial option, we may either delete the temporary file, or go
72: * ahead and overwrite the destination. This second behaviour only
73: * occurs if we've sent literal data and therefore hopefully made
74: * progress on the transfer.
75: **/
76:
77: /**
78: * Set to True once literal data has been sent across the link for the
79: * current file. (????)
80: *
81: * Handling the cleanup when a transfer is interrupted is tricky when
82: * --partial is selected. We need to ensure that the partial file is
83: * kept if any real data has been transferred.
84: **/
85: int cleanup_got_literal = 0;
86:
87: static const char *cleanup_fname;
88: static const char *cleanup_new_fname;
89: static struct file_struct *cleanup_file;
1.1.1.2 ! misho 90: static int cleanup_fd_r = -1, cleanup_fd_w = -1;
1.1 misho 91: static pid_t cleanup_pid = 0;
92:
93: pid_t cleanup_child_pid = -1;
94:
95: /**
96: * Eventually calls exit(), passing @p code, therefore does not return.
97: *
98: * @param code one of the RERR_* codes from errcode.h.
99: **/
100: NORETURN void _exit_cleanup(int code, const char *file, int line)
101: {
102: static int switch_step = 0;
103: static int exit_code = 0, exit_line = 0;
104: static const char *exit_file = NULL;
1.1.1.2 ! misho 105: static int first_code = 0;
1.1 misho 106:
107: SIGACTION(SIGUSR1, SIG_IGN);
108: SIGACTION(SIGUSR2, SIG_IGN);
109:
1.1.1.2 ! misho 110: if (!exit_code) { /* Preserve first error exit info when recursing. */
! 111: exit_code = code;
! 112: exit_file = file;
! 113: exit_line = line < 0 ? -line : line;
1.1 misho 114: }
115:
116: /* If this is the exit at the end of the run, the server side
117: * should not attempt to output a message (see log_exit()). */
118: if (am_server && code == 0)
119: am_server = 2;
120:
121: /* Some of our actions might cause a recursive call back here, so we
122: * keep track of where we are in the cleanup and never repeat a step. */
123: switch (switch_step) {
124: #include "case_N.h" /* case 0: */
125: switch_step++;
126:
1.1.1.2 ! misho 127: first_code = code;
! 128:
! 129: if (output_needs_newline) {
! 130: fputc('\n', stdout);
! 131: output_needs_newline = 0;
! 132: }
1.1 misho 133:
1.1.1.2 ! misho 134: if (DEBUG_GTE(EXIT, 2)) {
1.1 misho 135: rprintf(FINFO,
136: "[%s] _exit_cleanup(code=%d, file=%s, line=%d): entered\n",
137: who_am_i(), code, file, line);
138: }
139:
140: /* FALLTHROUGH */
141: #include "case_N.h"
142: switch_step++;
143:
144: if (cleanup_child_pid != -1) {
145: int status;
146: int pid = wait_process(cleanup_child_pid, &status, WNOHANG);
147: if (pid == cleanup_child_pid) {
148: status = WEXITSTATUS(status);
1.1.1.2 ! misho 149: if (status > exit_code)
! 150: exit_code = status;
1.1 misho 151: }
152: }
153:
154: /* FALLTHROUGH */
155: #include "case_N.h"
156: switch_step++;
157:
1.1.1.2 ! misho 158: if (cleanup_got_literal && (cleanup_fname || cleanup_fd_w != -1)) {
1.1 misho 159: const char *fname = cleanup_fname;
160: cleanup_fname = NULL;
1.1.1.2 ! misho 161: if (cleanup_fd_r != -1) {
1.1 misho 162: close(cleanup_fd_r);
1.1.1.2 ! misho 163: cleanup_fd_r = -1;
! 164: }
1.1 misho 165: if (cleanup_fd_w != -1) {
166: flush_write_file(cleanup_fd_w);
167: close(cleanup_fd_w);
1.1.1.2 ! misho 168: cleanup_fd_w = -1;
! 169: }
! 170: if (fname && cleanup_new_fname && keep_partial
! 171: && handle_partial_dir(cleanup_new_fname, PDIR_CREATE)) {
! 172: int tweak_modtime = 0;
! 173: if (!partial_dir) {
! 174: /* We don't want to leave a partial file with a modern time or it
! 175: * could be skipped via --update. Setting the time to something
! 176: * really old also helps it to stand out as unfinished in an ls. */
! 177: tweak_modtime = 1;
! 178: cleanup_file->modtime = 0;
! 179: }
! 180: finish_transfer(cleanup_new_fname, fname, NULL, NULL,
! 181: cleanup_file, tweak_modtime, !partial_dir);
1.1 misho 182: }
183: }
184:
185: /* FALLTHROUGH */
186: #include "case_N.h"
187: switch_step++;
188:
1.1.1.2 ! misho 189: if (flush_ok_after_signal) {
! 190: flush_ok_after_signal = False;
! 191: if (code == RERR_SIGNAL)
! 192: io_flush(FULL_FLUSH);
! 193: }
! 194: if (!exit_code && !code)
1.1 misho 195: io_flush(FULL_FLUSH);
196:
197: /* FALLTHROUGH */
198: #include "case_N.h"
199: switch_step++;
200:
201: if (cleanup_fname)
202: do_unlink(cleanup_fname);
1.1.1.2 ! misho 203: if (exit_code)
1.1 misho 204: kill_all(SIGUSR1);
205: if (cleanup_pid && cleanup_pid == getpid()) {
206: char *pidf = lp_pid_file();
207: if (pidf && *pidf)
208: unlink(lp_pid_file());
209: }
210:
1.1.1.2 ! misho 211: if (exit_code == 0) {
! 212: if (code)
! 213: exit_code = code;
1.1 misho 214: if (io_error & IOERR_DEL_LIMIT)
1.1.1.2 ! misho 215: exit_code = RERR_DEL_LIMIT;
1.1 misho 216: if (io_error & IOERR_VANISHED)
1.1.1.2 ! misho 217: exit_code = RERR_VANISHED;
1.1 misho 218: if (io_error & IOERR_GENERAL || got_xfer_error)
1.1.1.2 ! misho 219: exit_code = RERR_PARTIAL;
1.1 misho 220: }
221:
1.1.1.2 ! misho 222: /* If line < 0, this exit is after a MSG_ERROR_EXIT event, so
! 223: * we don't want to output a duplicate error. */
! 224: if ((exit_code && line > 0)
! 225: || am_daemon || (logfile_name && (am_server || !INFO_GTE(STATS, 1))))
! 226: log_exit(exit_code, exit_file, exit_line);
1.1 misho 227:
228: /* FALLTHROUGH */
229: #include "case_N.h"
230: switch_step++;
231:
1.1.1.2 ! misho 232: if (DEBUG_GTE(EXIT, 1)) {
1.1 misho 233: rprintf(FINFO,
234: "[%s] _exit_cleanup(code=%d, file=%s, line=%d): "
235: "about to call exit(%d)\n",
1.1.1.2 ! misho 236: who_am_i(), first_code, exit_file, exit_line, exit_code);
! 237: }
! 238:
! 239: /* FALLTHROUGH */
! 240: #include "case_N.h"
! 241: switch_step++;
! 242:
! 243: if (exit_code && exit_code != RERR_SOCKETIO && exit_code != RERR_STREAMIO && exit_code != RERR_SIGNAL1
! 244: && exit_code != RERR_TIMEOUT && !shutting_down && (protocol_version >= 31 || am_receiver)) {
! 245: if (line > 0) {
! 246: if (DEBUG_GTE(EXIT, 3)) {
! 247: rprintf(FINFO, "[%s] sending MSG_ERROR_EXIT with exit_code %d\n",
! 248: who_am_i(), exit_code);
! 249: }
! 250: send_msg_int(MSG_ERROR_EXIT, exit_code);
! 251: }
! 252: noop_io_until_death();
1.1 misho 253: }
254:
255: /* FALLTHROUGH */
256: #include "case_N.h"
257: switch_step++;
258:
1.1.1.2 ! misho 259: if (am_server && exit_code)
1.1 misho 260: msleep(100);
261: close_all();
262:
263: /* FALLTHROUGH */
264: default:
265: break;
266: }
267:
1.1.1.2 ! misho 268: exit(exit_code);
1.1 misho 269: }
270:
271: void cleanup_disable(void)
272: {
273: cleanup_fname = cleanup_new_fname = NULL;
1.1.1.2 ! misho 274: cleanup_fd_r = cleanup_fd_w = -1;
1.1 misho 275: cleanup_got_literal = 0;
276: }
277:
278:
279: void cleanup_set(const char *fnametmp, const char *fname, struct file_struct *file,
280: int fd_r, int fd_w)
281: {
282: cleanup_fname = fnametmp;
283: cleanup_new_fname = fname; /* can be NULL on a partial-dir failure */
284: cleanup_file = file;
285: cleanup_fd_r = fd_r;
286: cleanup_fd_w = fd_w;
287: }
288:
289: void cleanup_set_pid(pid_t pid)
290: {
291: cleanup_pid = pid;
292: }
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