1 /* -*- c-file-style: "linux"; -*-
3 Copyright (C) 1998-2001 by Andrew Tridgell <tridge@samba.org>
4 Copyright (C) 2000-2001 by Martin Pool <mbp@samba.org>
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 Logging and utility functions.
25 Mapping to human-readable messages added by Martin Pool
26 <mbp@samba.org>, Oct 2000.
30 static char *logfname;
32 static int log_error_fd = -1;
39 } const rerr_names[] = {
40 { RERR_SYNTAX , "syntax or usage error" },
41 { RERR_PROTOCOL , "protocol incompatibility" },
42 { RERR_FILESELECT , "errors selecting input/output files, dirs" },
43 { RERR_UNSUPPORTED, "requested action not supported" },
44 { RERR_SOCKETIO , "error in socket IO" },
45 { RERR_FILEIO , "error in file IO" },
46 { RERR_STREAMIO , "error in rsync protocol data stream" },
47 { RERR_MESSAGEIO , "errors with program diagnostics" },
48 { RERR_IPC , "error in IPC code" },
49 { RERR_SIGNAL , "received SIGUSR1 or SIGINT" },
50 { RERR_WAITCHILD , "some error returned by waitpid()" },
51 { RERR_MALLOC , "error allocating core memory buffers" },
52 { RERR_PARTIAL , "partial transfer" },
53 { RERR_TIMEOUT , "timeout in data send/receive" },
54 { RERR_CMD_FAILED , "remote shell failed" },
55 { RERR_CMD_KILLED , "remote shell killed" },
56 { RERR_CMD_RUN, "remote command could not be run" },
57 { RERR_CMD_NOTFOUND, "remote command not found" },
64 * Map from rsync error code to name, or return NULL.
66 static char const *rerr_name(int code)
69 for (i = 0; rerr_names[i].name; i++) {
70 if (rerr_names[i].code == code)
71 return rerr_names[i].name;
77 struct err_list *next;
80 int written; /* how many bytes we have written so far */
83 static struct err_list *err_list_head;
84 static struct err_list *err_list_tail;
86 /* add an error message to the pending error list */
87 static void err_list_add(int code, char *buf, int len)
90 el = (struct err_list *)malloc(sizeof(*el));
91 if (!el) exit_cleanup(RERR_MALLOC);
93 el->buf = malloc(len+4);
94 if (!el->buf) exit_cleanup(RERR_MALLOC);
95 memcpy(el->buf+4, buf, len);
96 SIVAL(el->buf, 0, ((code+MPLEX_BASE)<<24) | len);
100 err_list_tail->next = el;
108 /* try to push errors off the error list onto the wire */
109 void err_list_push(void)
111 if (log_error_fd == -1) return;
113 while (err_list_head) {
114 struct err_list *el = err_list_head;
115 int n = write(log_error_fd, el->buf+el->written, el->len - el->written);
116 /* don't check for an error if the best way of handling the error is
122 if (el->written == el->len) {
124 err_list_head = el->next;
125 if (!err_list_head) err_list_tail = NULL;
132 static void logit(int priority, char *buf)
137 fprintf(logfile,"%s [%d] %s",
138 timestring(time(NULL)), (int)getpid(), buf);
141 syslog(priority, "%s", buf);
147 static int initialised;
148 int options = LOG_PID;
151 if (initialised) return;
154 /* this looks pointless, but it is needed in order for the
155 C library on some systems to fetch the timezone info
160 /* optionally use a log file instead of syslog */
161 logfname = lp_log_file();
171 options |= LOG_NDELAY;
175 openlog("rsyncd", options, lp_syslog_facility());
177 openlog("rsyncd", options);
181 logit(LOG_INFO,"rsyncd started\n");
187 if (logfname && !logfile) {
188 extern int orig_umask;
189 int old_umask = umask(022 | orig_umask);
190 logfile = fopen(logfname, "a");
203 /* setup the error file descriptor - used when we are a server
204 that is receiving files */
205 void set_error_fd(int fd)
208 set_nonblocking(log_error_fd);
211 /* this is the underlying (unformatted) rsync debugging function. Call
212 it with FINFO, FERROR or FLOG */
213 void rwrite(enum logcode code, char *buf, int len)
216 extern int am_daemon;
217 extern int am_server;
219 /* recursion can happen with certain fatal conditions */
221 if (quiet && code == FINFO) return;
223 if (len < 0) exit_cleanup(RERR_MESSAGEIO);
228 if (am_daemon) logit(LOG_INFO, buf);
232 /* first try to pass it off to our sibling */
233 if (am_server && log_error_fd != -1) {
234 err_list_add(code, buf, len);
239 /* if that fails, try to pass it to the other end */
240 if (am_server && io_multiplex_write(code, buf, len)) {
246 int priority = LOG_INFO;
247 if (code == FERROR) priority = LOG_WARNING;
254 logit(priority, buf);
260 if (code == FERROR) {
272 if (!f) exit_cleanup(RERR_MESSAGEIO);
274 if (fwrite(buf, len, 1, f) != 1) exit_cleanup(RERR_MESSAGEIO);
276 if (buf[len-1] == '\r' || buf[len-1] == '\n') fflush(f);
280 /* This is the rsync debugging function. Call it with FINFO, FERROR or
282 void rprintf(enum logcode code, const char *format, ...)
288 va_start(ap, format);
289 /* Note: might return -1 */
290 len = vsnprintf(buf, sizeof(buf), format, ap);
293 /* Deal with buffer overruns. Instead of panicking, just
294 * truncate the resulting string. Note that some vsnprintf()s
295 * return -1 on truncation, e.g., glibc 2.0.6 and earlier. */
296 if ((size_t) len > sizeof(buf)-1 || len < 0) {
297 const char ellipsis[] = "[...]";
299 /* Reset length, and zero-terminate the end of our buffer */
303 /* Copy the ellipsis to the end of the string, but give
304 * us one extra character:
306 * v--- null byte at buf[sizeof(buf)-1]
308 * -> abcd[...]00 <-- now two null bytes at end
310 * If the input format string has a trailing newline,
311 * we copy it into that extra null; if it doesn't, well,
312 * all we lose is one byte. */
313 strncpy(buf+len-sizeof(ellipsis), ellipsis, sizeof(ellipsis));
314 if (format[strlen(format)-1] == '\n') {
319 rwrite(code, buf, len);
323 /* This is like rprintf, but it also tries to print some
324 * representation of the error code. Normally errcode = errno.
326 * Unlike rprintf, this always adds a newline and there should not be
327 * one in the format string.
329 * Note that since strerror might involve dynamically loading a
330 * message catalog we need to call it once before chroot-ing. */
331 void rsyserr(enum logcode code, int errcode, const char *format, ...)
339 va_start(ap, format);
340 /* Note: might return <0 */
341 len = vsnprintf(buf, sizeof(buf), format, ap);
344 if ((size_t) len > sizeof(buf)-1)
345 exit_cleanup(RERR_MESSAGEIO);
347 sysmsg = strerror(errcode);
348 sys_len = strlen(sysmsg);
349 if ((size_t) len + 3 + sys_len > sizeof(buf) - 1)
350 exit_cleanup(RERR_MESSAGEIO);
352 strcpy(buf + len, ": ");
354 strcpy(buf + len, sysmsg);
356 strcpy(buf + len, "\n");
359 rwrite(code, buf, len);
364 void rflush(enum logcode code)
367 extern int am_daemon;
377 if (code == FERROR) {
382 extern int am_server;
389 if (!f) exit_cleanup(RERR_MESSAGEIO);
395 /* a generic logging routine for send/recv, with parameter
397 static void log_formatted(enum logcode code,
398 char *format, char *op, struct file_struct *file,
399 struct stats *initial_stats)
401 extern int module_id;
402 extern char *auth_user;
407 extern struct stats stats;
408 extern int am_sender;
409 extern int am_daemon;
412 strlcpy(buf, format, sizeof(buf));
415 s && (p=strchr(s,'%')); ) {
420 case 'h': if (am_daemon) n = client_name(0); break;
421 case 'a': if (am_daemon) n = client_addr(0); break;
423 snprintf(buf2,sizeof(buf2),"%.0f",
424 (double)file->length);
428 snprintf(buf2,sizeof(buf2),"%d",
432 case 'o': n = op; break;
434 snprintf(buf2, sizeof(buf2), "%s/%s",
435 file->basedir?file->basedir:"",
441 case 'm': n = lp_name(module_id); break;
442 case 't': n = timestring(time(NULL)); break;
443 case 'P': n = lp_path(module_id); break;
444 case 'u': n = auth_user; break;
447 b = stats.total_written -
448 initial_stats->total_written;
450 b = stats.total_read -
451 initial_stats->total_read;
453 snprintf(buf2,sizeof(buf2),"%.0f", (double)b);
458 b = stats.total_written -
459 initial_stats->total_written;
461 b = stats.total_read -
462 initial_stats->total_read;
464 snprintf(buf2,sizeof(buf2),"%.0f", (double)b);
473 if (l + ((int)(s - &buf[0])) >= sizeof(buf)) {
474 rprintf(FERROR,"buffer overflow expanding %%%c - exiting\n",
476 exit_cleanup(RERR_MESSAGEIO);
480 memmove(s+(l-1), s+1, strlen(s+1)+1);
487 rprintf(code,"%s\n", buf);
490 /* log the outgoing transfer of a file */
491 void log_send(struct file_struct *file, struct stats *initial_stats)
493 extern int module_id;
494 extern int am_server;
495 extern char *log_format;
497 if (lp_transfer_logging(module_id)) {
498 log_formatted(FLOG, lp_log_format(module_id), "send", file, initial_stats);
499 } else if (log_format && !am_server) {
500 log_formatted(FINFO, log_format, "send", file, initial_stats);
504 /* log the incoming transfer of a file */
505 void log_recv(struct file_struct *file, struct stats *initial_stats)
507 extern int module_id;
508 extern int am_server;
509 extern char *log_format;
511 if (lp_transfer_logging(module_id)) {
512 log_formatted(FLOG, lp_log_format(module_id), "recv", file, initial_stats);
513 } else if (log_format && !am_server) {
514 log_formatted(FINFO, log_format, "recv", file, initial_stats);
522 * Called when the transfer is interrupted for some reason.
524 * Code is one of the RERR_* codes from errcode.h, or terminating
527 void log_exit(int code, const char *file, int line)
530 extern struct stats stats;
531 rprintf(FLOG,"wrote %.0f bytes read %.0f bytes total size %.0f\n",
532 (double)stats.total_written,
533 (double)stats.total_read,
534 (double)stats.total_size);
538 name = rerr_name(code);
540 name = "unexplained error";
542 rprintf(FERROR,"rsync error: %s (code %d) at %s(%d)\n",
543 name, code, file, line);
550 /* log the incoming transfer of a file for interactive use, this
551 will be called at the end where the client was run
553 it i called when a file starts to be transferred
555 void log_transfer(struct file_struct *file, const char *fname)
559 if (!verbose) return;
561 rprintf(FINFO,"%s\n", fname);