Annotation of embedaddon/rsync/cleanup.c, revision 1.1.1.3
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
1.1.1.3 ! misho 7: * Copyright (C) 2003-2015 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:
1.1.1.3 ! misho 25: extern int dry_run;
1.1 misho 26: extern int am_server;
27: extern int am_daemon;
28: extern int am_receiver;
29: extern int io_error;
30: extern int keep_partial;
31: extern int got_xfer_error;
1.1.1.2 misho 32: extern int protocol_version;
33: extern int output_needs_newline;
1.1 misho 34: extern char *partial_dir;
35: extern char *logfile_name;
36:
1.1.1.2 misho 37: BOOL shutting_down = False;
38: BOOL flush_ok_after_signal = False;
39:
1.1 misho 40: #ifdef HAVE_SIGACTION
41: static struct sigaction sigact;
42: #endif
43:
44: /**
45: * Close all open sockets and files, allowing a (somewhat) graceful
46: * shutdown() of socket connections. This eliminates the abortive
47: * TCP RST sent by a Winsock-based system when the close() occurs.
48: **/
49: void close_all(void)
50: {
51: #ifdef SHUTDOWN_ALL_SOCKETS
52: int max_fd;
53: int fd;
54: int ret;
55: STRUCT_STAT st;
56:
57: max_fd = sysconf(_SC_OPEN_MAX) - 1;
58: for (fd = max_fd; fd >= 0; fd--) {
59: if ((ret = do_fstat(fd, &st)) == 0) {
60: if (is_a_socket(fd))
61: ret = shutdown(fd, 2);
62: ret = close(fd);
63: }
64: }
65: #endif
66: }
67:
68: /**
69: * @file cleanup.c
70: *
71: * Code for handling interrupted transfers. Depending on the @c
72: * --partial option, we may either delete the temporary file, or go
73: * ahead and overwrite the destination. This second behaviour only
74: * occurs if we've sent literal data and therefore hopefully made
75: * progress on the transfer.
76: **/
77:
78: /**
79: * Set to True once literal data has been sent across the link for the
80: * current file. (????)
81: *
82: * Handling the cleanup when a transfer is interrupted is tricky when
83: * --partial is selected. We need to ensure that the partial file is
84: * kept if any real data has been transferred.
85: **/
86: int cleanup_got_literal = 0;
87:
88: static const char *cleanup_fname;
89: static const char *cleanup_new_fname;
90: static struct file_struct *cleanup_file;
1.1.1.2 misho 91: static int cleanup_fd_r = -1, cleanup_fd_w = -1;
1.1 misho 92: static pid_t cleanup_pid = 0;
93:
94: pid_t cleanup_child_pid = -1;
95:
96: /**
97: * Eventually calls exit(), passing @p code, therefore does not return.
98: *
99: * @param code one of the RERR_* codes from errcode.h.
100: **/
101: NORETURN void _exit_cleanup(int code, const char *file, int line)
102: {
103: static int switch_step = 0;
104: static int exit_code = 0, exit_line = 0;
105: static const char *exit_file = NULL;
1.1.1.2 misho 106: static int first_code = 0;
1.1 misho 107:
108: SIGACTION(SIGUSR1, SIG_IGN);
109: SIGACTION(SIGUSR2, SIG_IGN);
110:
1.1.1.2 misho 111: if (!exit_code) { /* Preserve first error exit info when recursing. */
112: exit_code = code;
113: exit_file = file;
114: exit_line = line < 0 ? -line : line;
1.1 misho 115: }
116:
117: /* If this is the exit at the end of the run, the server side
118: * should not attempt to output a message (see log_exit()). */
119: if (am_server && code == 0)
120: am_server = 2;
121:
122: /* Some of our actions might cause a recursive call back here, so we
123: * keep track of where we are in the cleanup and never repeat a step. */
124: switch (switch_step) {
125: #include "case_N.h" /* case 0: */
126: switch_step++;
127:
1.1.1.2 misho 128: first_code = code;
129:
130: if (output_needs_newline) {
131: fputc('\n', stdout);
132: output_needs_newline = 0;
133: }
1.1 misho 134:
1.1.1.2 misho 135: if (DEBUG_GTE(EXIT, 2)) {
1.1 misho 136: rprintf(FINFO,
137: "[%s] _exit_cleanup(code=%d, file=%s, line=%d): entered\n",
138: who_am_i(), code, file, line);
139: }
140:
141: /* FALLTHROUGH */
142: #include "case_N.h"
143: switch_step++;
144:
145: if (cleanup_child_pid != -1) {
146: int status;
147: int pid = wait_process(cleanup_child_pid, &status, WNOHANG);
148: if (pid == cleanup_child_pid) {
149: status = WEXITSTATUS(status);
1.1.1.2 misho 150: if (status > exit_code)
151: exit_code = status;
1.1 misho 152: }
153: }
154:
155: /* FALLTHROUGH */
156: #include "case_N.h"
157: switch_step++;
158:
1.1.1.2 misho 159: if (cleanup_got_literal && (cleanup_fname || cleanup_fd_w != -1)) {
160: if (cleanup_fd_r != -1) {
1.1 misho 161: close(cleanup_fd_r);
1.1.1.2 misho 162: cleanup_fd_r = -1;
163: }
1.1 misho 164: if (cleanup_fd_w != -1) {
165: flush_write_file(cleanup_fd_w);
166: close(cleanup_fd_w);
1.1.1.2 misho 167: cleanup_fd_w = -1;
168: }
1.1.1.3 ! misho 169: if (cleanup_fname && cleanup_new_fname && keep_partial
1.1.1.2 misho 170: && handle_partial_dir(cleanup_new_fname, PDIR_CREATE)) {
171: int tweak_modtime = 0;
1.1.1.3 ! misho 172: const char *fname = cleanup_fname;
! 173: cleanup_fname = NULL;
1.1.1.2 misho 174: if (!partial_dir) {
175: /* We don't want to leave a partial file with a modern time or it
176: * could be skipped via --update. Setting the time to something
177: * really old also helps it to stand out as unfinished in an ls. */
178: tweak_modtime = 1;
179: cleanup_file->modtime = 0;
180: }
181: finish_transfer(cleanup_new_fname, fname, NULL, NULL,
182: cleanup_file, tweak_modtime, !partial_dir);
1.1 misho 183: }
184: }
185:
186: /* FALLTHROUGH */
187: #include "case_N.h"
188: switch_step++;
189:
1.1.1.2 misho 190: if (flush_ok_after_signal) {
191: flush_ok_after_signal = False;
192: if (code == RERR_SIGNAL)
193: io_flush(FULL_FLUSH);
194: }
195: if (!exit_code && !code)
1.1 misho 196: io_flush(FULL_FLUSH);
197:
198: /* FALLTHROUGH */
199: #include "case_N.h"
200: switch_step++;
201:
202: if (cleanup_fname)
203: do_unlink(cleanup_fname);
1.1.1.2 misho 204: if (exit_code)
1.1 misho 205: kill_all(SIGUSR1);
206: if (cleanup_pid && cleanup_pid == getpid()) {
207: char *pidf = lp_pid_file();
208: if (pidf && *pidf)
209: unlink(lp_pid_file());
210: }
211:
1.1.1.2 misho 212: if (exit_code == 0) {
213: if (code)
214: exit_code = code;
1.1 misho 215: if (io_error & IOERR_DEL_LIMIT)
1.1.1.2 misho 216: exit_code = RERR_DEL_LIMIT;
1.1 misho 217: if (io_error & IOERR_VANISHED)
1.1.1.2 misho 218: exit_code = RERR_VANISHED;
1.1 misho 219: if (io_error & IOERR_GENERAL || got_xfer_error)
1.1.1.2 misho 220: exit_code = RERR_PARTIAL;
1.1 misho 221: }
222:
1.1.1.2 misho 223: /* If line < 0, this exit is after a MSG_ERROR_EXIT event, so
224: * we don't want to output a duplicate error. */
225: if ((exit_code && line > 0)
226: || am_daemon || (logfile_name && (am_server || !INFO_GTE(STATS, 1))))
227: log_exit(exit_code, exit_file, exit_line);
1.1 misho 228:
229: /* FALLTHROUGH */
230: #include "case_N.h"
231: switch_step++;
232:
1.1.1.2 misho 233: if (DEBUG_GTE(EXIT, 1)) {
1.1 misho 234: rprintf(FINFO,
235: "[%s] _exit_cleanup(code=%d, file=%s, line=%d): "
1.1.1.3 ! misho 236: "about to call exit(%d)%s\n",
! 237: who_am_i(), first_code, exit_file, exit_line, exit_code,
! 238: dry_run ? " (DRY RUN)" : "");
1.1.1.2 misho 239: }
240:
241: /* FALLTHROUGH */
242: #include "case_N.h"
243: switch_step++;
244:
245: if (exit_code && exit_code != RERR_SOCKETIO && exit_code != RERR_STREAMIO && exit_code != RERR_SIGNAL1
246: && exit_code != RERR_TIMEOUT && !shutting_down && (protocol_version >= 31 || am_receiver)) {
247: if (line > 0) {
248: if (DEBUG_GTE(EXIT, 3)) {
249: rprintf(FINFO, "[%s] sending MSG_ERROR_EXIT with exit_code %d\n",
250: who_am_i(), exit_code);
251: }
252: send_msg_int(MSG_ERROR_EXIT, exit_code);
253: }
254: noop_io_until_death();
1.1 misho 255: }
256:
257: /* FALLTHROUGH */
258: #include "case_N.h"
259: switch_step++;
260:
1.1.1.2 misho 261: if (am_server && exit_code)
1.1 misho 262: msleep(100);
263: close_all();
264:
265: /* FALLTHROUGH */
266: default:
267: break;
268: }
269:
1.1.1.2 misho 270: exit(exit_code);
1.1 misho 271: }
272:
273: void cleanup_disable(void)
274: {
275: cleanup_fname = cleanup_new_fname = NULL;
1.1.1.2 misho 276: cleanup_fd_r = cleanup_fd_w = -1;
1.1 misho 277: cleanup_got_literal = 0;
278: }
279:
280:
281: void cleanup_set(const char *fnametmp, const char *fname, struct file_struct *file,
282: int fd_r, int fd_w)
283: {
284: cleanup_fname = fnametmp;
285: cleanup_new_fname = fname; /* can be NULL on a partial-dir failure */
286: cleanup_file = file;
287: cleanup_fd_r = fd_r;
288: cleanup_fd_w = fd_w;
289: }
290:
291: void cleanup_set_pid(pid_t pid)
292: {
293: cleanup_pid = pid;
294: }
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