log.c

   1 /*
   2    Copyright (C) Andrew Tridgell 1998
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software
  16    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17 */
  18
  19 /*
  20   logging and utility functions
  21
  22   tridge, May 1998
  23   */
  24 #include "rsync.h"
  25
  26 static FILE *logfile;
  27
  28
  29 static void logit(int priority, char *buf)
  30 {
  31         if (logfile) {
  32                 fprintf(logfile,"%s [%d] %s",
  33                         timestring(time(NULL)), (int)getpid(), buf);
  34                 fflush(logfile);
  35         } else {
  36                 syslog(priority, "%s", buf);
  37         }
  38 }
  39
  40 void log_open(void)
  41 {
  42         static int initialised;
  43         int options = LOG_PID;
  44         time_t t;
  45         char *logf;
  46
  47         if (initialised) return;
  48         initialised = 1;
  49
  50         /* this looks pointless, but it is needed in order for the
  51            C library on some systems to fetch the timezone info
  52            before the chroot */
  53         t = time(NULL);
  54         localtime(&t);
  55
  56         /* optionally use a log file instead of syslog */
  57         logf = lp_log_file();
  58         if (logf && *logf) {
  59                 extern int orig_umask;
  60                 int old_umask = umask(022 | orig_umask);
  61                 logfile = fopen(logf, "a");
  62                 umask(old_umask);
  63                 return;
  64         }
  65
  66 #ifdef LOG_NDELAY
  67         options |= LOG_NDELAY;
  68 #endif
  69
  70 #ifdef LOG_DAEMON
  71         openlog("rsyncd", options, lp_syslog_facility());
  72 #else
  73         openlog("rsyncd", options);
  74 #endif
  75
  76 #ifndef LOG_NDELAY
  77         logit(LOG_INFO,"rsyncd started\n");
  78 #endif
  79 }
  80
  81
  82 /* this is the rsync debugging function. Call it with FINFO, FERROR or FLOG */
  83  void rprintf(int fd, const char *format, ...)
  84 {
  85         va_list ap;
  86         char buf[1024];
  87         int len;
  88         FILE *f=NULL;
  89         extern int am_daemon;
  90         extern int quiet;
  91         /* recursion can happen with certain fatal conditions */
  92
  93         if (quiet != 0 && fd == FINFO) return;
  94
  95         va_start(ap, format);
  96         len = vslprintf(buf, sizeof(buf), format, ap);
  97         va_end(ap);
  98
  99         if (len < 0) exit_cleanup(RERR_MESSAGEIO);
 100
 101         if (len > sizeof(buf)-1) exit_cleanup(RERR_MESSAGEIO);
 102
 103         buf[len] = 0;
 104
 105         if (fd == FLOG) {
 106                 if (am_daemon) logit(LOG_INFO, buf);
 107                 return;
 108         }
 109
 110         if (am_daemon) {
 111                 static int depth;
 112                 int priority = LOG_INFO;
 113                 if (fd == FERROR) priority = LOG_WARNING;
 114
 115                 if (depth) return;
 116
 117                 depth++;
 118
 119                 log_open();
 120                 if (!io_multiplex_write(fd, buf, strlen(buf))) {
 121                         logit(priority, buf);
 122                 }
 123
 124                 depth--;
 125                 return;
 126         }
 127
 128         if (fd == FERROR) {
 129                 f = stderr;
 130         }
 131
 132         if (fd == FINFO) {
 133                 extern int am_server;
 134                 if (am_server)
 135                         f = stderr;
 136                 else
 137                         f = stdout;
 138         }
 139
 140         if (!f) exit_cleanup(RERR_MESSAGEIO);
 141
 142         if (fwrite(buf, len, 1, f) != 1) exit_cleanup(RERR_MESSAGEIO);
 143
 144         if (buf[len-1] == '\r' || buf[len-1] == '\n') fflush(f);
 145 }
 146
 147 void rflush(int fd)
 148 {
 149         FILE *f = NULL;
 150         extern int am_daemon;
 151
 152         if (am_daemon) {
 153                 return;
 154         }
 155
 156         if (fd == FLOG) {
 157                 return;
 158         }
 159
 160         if (fd == FERROR) {
 161                 f = stderr;
 162         }
 163
 164         if (fd == FINFO) {
 165                 extern int am_server;
 166                 if (am_server)
 167                         f = stderr;
 168                 else
 169                         f = stdout;
 170         }
 171
 172         if (!f) exit_cleanup(RERR_MESSAGEIO);
 173         fflush(f);
 174 }
 175
 176
 177
 178 /* a generic logging routine for send/recv, with parameter
 179    substitiution */
 180 static void log_formatted(int fd,
 181                           char *format, char *op, struct file_struct *file,
 182                           struct stats *initial_stats)
 183 {
 184         extern int module_id;
 185         extern char *auth_user;
 186         char buf[1024];
 187         char buf2[1024];
 188         char *p, *s, *n;
 189         int l;
 190         extern struct stats stats;
 191         extern int am_sender;
 192         extern int am_daemon;
 193         int64 b;
 194
 195         strlcpy(buf, format, sizeof(buf));
 196
 197         for (s=&buf[0];
 198              s && (p=strchr(s,'%')); ) {
 199                 n = NULL;
 200                 s = p + 1;
 201
 202                 switch (p[1]) {
 203                 case 'h': if (am_daemon) n = client_name(0); break;
 204                 case 'a': if (am_daemon) n = client_addr(0); break;
 205                 case 'l':
 206                         slprintf(buf2,sizeof(buf2),"%.0f",
 207                                  (double)file->length);
 208                         n = buf2;
 209                         break;
 210                 case 'p':
 211                         slprintf(buf2,sizeof(buf2),"%d",
 212                                  (int)getpid());
 213                         n = buf2;
 214                         break;
 215                 case 'o': n = op; break;
 216                 case 'f':
 217                         slprintf(buf2, sizeof(buf2), "%s/%s",
 218                                  file->basedir?file->basedir:"",
 219                                  f_name(file));
 220                         clean_fname(buf2);
 221                         n = buf2;
 222                         if (*n == '/') n++;
 223                         break;
 224                 case 'm': n = lp_name(module_id); break;
 225                 case 't': n = timestring(time(NULL)); break;
 226                 case 'P': n = lp_path(module_id); break;
 227                 case 'u': n = auth_user; break;
 228                 case 'b':
 229                         if (am_sender) {
 230                                 b = stats.total_written -
 231                                         initial_stats->total_written;
 232                         } else {
 233                                 b = stats.total_read -
 234                                         initial_stats->total_read;
 235                         }
 236                         slprintf(buf2,sizeof(buf2),"%.0f", (double)b);
 237                         n = buf2;
 238                         break;
 239                 case 'c':
 240                         if (!am_sender) {
 241                                 b = stats.total_written -
 242                                         initial_stats->total_written;
 243                         } else {
 244                                 b = stats.total_read -
 245                                         initial_stats->total_read;
 246                         }
 247                         slprintf(buf2,sizeof(buf2),"%.0f", (double)b);
 248                         n = buf2;
 249                         break;
 250                 }
 251
 252                 if (!n) continue;
 253
 254                 l = strlen(n);
 255
 256                 if ((l-1) + ((int)(s - &buf[0])) > sizeof(buf)) {
 257                         rprintf(FERROR,"buffer overflow expanding %%%c - exiting\n",
 258                                 p[0]);
 259                         exit_cleanup(RERR_MESSAGEIO);
 260                 }
 261
 262                 if (l != 2) {
 263                         memmove(s+(l-1), s+1, strlen(s+1)+1);
 264                 }
 265                 memcpy(p, n, l);
 266
 267                 s = p+l;
 268         }
 269
 270         rprintf(fd,"%s\n", buf);
 271 }
 272
 273 /* log the outgoing transfer of a file */
 274 void log_send(struct file_struct *file, struct stats *initial_stats)
 275 {
 276         extern int module_id;
 277         extern int am_server;
 278         extern char *log_format;
 279
 280         if (lp_transfer_logging(module_id)) {
 281                 log_formatted(FLOG, lp_log_format(module_id), "send", file, initial_stats);
 282         } else if (log_format && !am_server) {
 283                 log_formatted(FINFO, log_format, "send", file, initial_stats);
 284         }
 285 }
 286
 287 /* log the incoming transfer of a file */
 288 void log_recv(struct file_struct *file, struct stats *initial_stats)
 289 {
 290         extern int module_id;
 291         extern int am_server;
 292         extern char *log_format;
 293
 294         if (lp_transfer_logging(module_id)) {
 295                 log_formatted(FLOG, lp_log_format(module_id), "recv", file, initial_stats);
 296         } else if (log_format && !am_server) {
 297                 log_formatted(FINFO, log_format, "recv", file, initial_stats);
 298         }
 299 }
 300
 301 /* called when the transfer is interrupted for some reason */
 302 void log_exit(int code, const char *file, int line)
 303 {
 304         if (code == 0) {
 305                 extern struct stats stats;
 306                 rprintf(FLOG,"wrote %.0f bytes  read %.0f bytes  total size %.0f\n",
 307                         (double)stats.total_written,
 308                         (double)stats.total_read,
 309                         (double)stats.total_size);
 310         } else {
 311                 rprintf(FLOG,"transfer interrupted (code %d) at %s(%d)\n",
 312                         code, file, line);
 313         }
 314 }
 315
 316 /* log the incoming transfer of a file for interactive use, this
 317    will be called at the end where the client was run
 318
 319    it i called when a file starts to be transferred
 320 */
 321 void log_transfer(struct file_struct *file, const char *fname)
 322 {
 323         extern int verbose;
 324
 325         if (!verbose) return;
 326
 327         rprintf(FINFO,"%s\n", fname);
 328 }
 329