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
7: * Copyright (C) 2003-2009 Wayne Davison
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;
31: extern char *partial_dir;
32: extern char *logfile_name;
33:
34: #ifdef HAVE_SIGACTION
35: static struct sigaction sigact;
36: #endif
37:
38: /**
39: * Close all open sockets and files, allowing a (somewhat) graceful
40: * shutdown() of socket connections. This eliminates the abortive
41: * TCP RST sent by a Winsock-based system when the close() occurs.
42: **/
43: void close_all(void)
44: {
45: #ifdef SHUTDOWN_ALL_SOCKETS
46: int max_fd;
47: int fd;
48: int ret;
49: STRUCT_STAT st;
50:
51: max_fd = sysconf(_SC_OPEN_MAX) - 1;
52: for (fd = max_fd; fd >= 0; fd--) {
53: if ((ret = do_fstat(fd, &st)) == 0) {
54: if (is_a_socket(fd))
55: ret = shutdown(fd, 2);
56: ret = close(fd);
57: }
58: }
59: #endif
60: }
61:
62: /**
63: * @file cleanup.c
64: *
65: * Code for handling interrupted transfers. Depending on the @c
66: * --partial option, we may either delete the temporary file, or go
67: * ahead and overwrite the destination. This second behaviour only
68: * occurs if we've sent literal data and therefore hopefully made
69: * progress on the transfer.
70: **/
71:
72: /**
73: * Set to True once literal data has been sent across the link for the
74: * current file. (????)
75: *
76: * Handling the cleanup when a transfer is interrupted is tricky when
77: * --partial is selected. We need to ensure that the partial file is
78: * kept if any real data has been transferred.
79: **/
80: int cleanup_got_literal = 0;
81:
82: static const char *cleanup_fname;
83: static const char *cleanup_new_fname;
84: static struct file_struct *cleanup_file;
85: static int cleanup_fd_r, cleanup_fd_w;
86: static pid_t cleanup_pid = 0;
87:
88: pid_t cleanup_child_pid = -1;
89:
90: /**
91: * Eventually calls exit(), passing @p code, therefore does not return.
92: *
93: * @param code one of the RERR_* codes from errcode.h.
94: **/
95: NORETURN void _exit_cleanup(int code, const char *file, int line)
96: {
97: static int switch_step = 0;
98: static int exit_code = 0, exit_line = 0;
99: static const char *exit_file = NULL;
100: static int unmodified_code = 0;
101:
102: SIGACTION(SIGUSR1, SIG_IGN);
103: SIGACTION(SIGUSR2, SIG_IGN);
104:
105: if (exit_code) { /* Preserve first exit info when recursing. */
106: code = exit_code;
107: file = exit_file;
108: line = exit_line;
109: }
110:
111: /* If this is the exit at the end of the run, the server side
112: * should not attempt to output a message (see log_exit()). */
113: if (am_server && code == 0)
114: am_server = 2;
115:
116: /* Some of our actions might cause a recursive call back here, so we
117: * keep track of where we are in the cleanup and never repeat a step. */
118: switch (switch_step) {
119: #include "case_N.h" /* case 0: */
120: switch_step++;
121:
122: exit_code = unmodified_code = code;
123: exit_file = file;
124: exit_line = line;
125:
126: if (verbose > 3) {
127: rprintf(FINFO,
128: "[%s] _exit_cleanup(code=%d, file=%s, line=%d): entered\n",
129: who_am_i(), code, file, line);
130: }
131:
132: /* FALLTHROUGH */
133: #include "case_N.h"
134: switch_step++;
135:
136: if (cleanup_child_pid != -1) {
137: int status;
138: int pid = wait_process(cleanup_child_pid, &status, WNOHANG);
139: if (pid == cleanup_child_pid) {
140: status = WEXITSTATUS(status);
141: if (status > code)
142: code = exit_code = status;
143: }
144: }
145:
146: /* FALLTHROUGH */
147: #include "case_N.h"
148: switch_step++;
149:
150: if (cleanup_got_literal && cleanup_fname && cleanup_new_fname
151: && keep_partial && handle_partial_dir(cleanup_new_fname, PDIR_CREATE)) {
152: const char *fname = cleanup_fname;
153: cleanup_fname = NULL;
154: if (cleanup_fd_r != -1)
155: close(cleanup_fd_r);
156: if (cleanup_fd_w != -1) {
157: flush_write_file(cleanup_fd_w);
158: close(cleanup_fd_w);
159: }
160: finish_transfer(cleanup_new_fname, fname, NULL, NULL,
161: cleanup_file, 0, !partial_dir);
162: }
163:
164: /* FALLTHROUGH */
165: #include "case_N.h"
166: switch_step++;
167:
168: if (!code || am_server || am_receiver)
169: io_flush(FULL_FLUSH);
170:
171: /* FALLTHROUGH */
172: #include "case_N.h"
173: switch_step++;
174:
175: if (cleanup_fname)
176: do_unlink(cleanup_fname);
177: if (code)
178: kill_all(SIGUSR1);
179: if (cleanup_pid && cleanup_pid == getpid()) {
180: char *pidf = lp_pid_file();
181: if (pidf && *pidf)
182: unlink(lp_pid_file());
183: }
184:
185: if (code == 0) {
186: if (io_error & IOERR_DEL_LIMIT)
187: code = exit_code = RERR_DEL_LIMIT;
188: if (io_error & IOERR_VANISHED)
189: code = exit_code = RERR_VANISHED;
190: if (io_error & IOERR_GENERAL || got_xfer_error)
191: code = exit_code = RERR_PARTIAL;
192: }
193:
194: if (code || am_daemon || (logfile_name && (am_server || !verbose)))
195: log_exit(code, file, line);
196:
197: /* FALLTHROUGH */
198: #include "case_N.h"
199: switch_step++;
200:
201: if (verbose > 2) {
202: rprintf(FINFO,
203: "[%s] _exit_cleanup(code=%d, file=%s, line=%d): "
204: "about to call exit(%d)\n",
205: who_am_i(), unmodified_code, file, line, code);
206: }
207:
208: /* FALLTHROUGH */
209: #include "case_N.h"
210: switch_step++;
211:
212: if (am_server && code)
213: msleep(100);
214: close_all();
215:
216: /* FALLTHROUGH */
217: default:
218: break;
219: }
220:
221: exit(code);
222: }
223:
224: void cleanup_disable(void)
225: {
226: cleanup_fname = cleanup_new_fname = NULL;
227: cleanup_got_literal = 0;
228: }
229:
230:
231: void cleanup_set(const char *fnametmp, const char *fname, struct file_struct *file,
232: int fd_r, int fd_w)
233: {
234: cleanup_fname = fnametmp;
235: cleanup_new_fname = fname; /* can be NULL on a partial-dir failure */
236: cleanup_file = file;
237: cleanup_fd_r = fd_r;
238: cleanup_fd_w = fd_w;
239: }
240:
241: void cleanup_set_pid(pid_t pid)
242: {
243: cleanup_pid = pid;
244: }
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