| d9898ee8 |
1 | /* |
| 2 | ** Copyright 1998 - 2006 Double Precision, Inc. |
| 3 | ** See COPYING for distribution information. |
| 4 | */ |
| 5 | |
| 6 | #if HAVE_CONFIG_H |
| 7 | #include "config.h" |
| 8 | #endif |
| 9 | #include <string.h> |
| 10 | #include <stdio.h> |
| 11 | #include <stdlib.h> |
| 12 | #include <sys/types.h> |
| 13 | #include <sys/wait.h> |
| 14 | #include <signal.h> |
| 15 | #include <errno.h> |
| 16 | #include <fcntl.h> |
| 17 | #include <pwd.h> |
| 18 | #include <grp.h> |
| 19 | #if HAVE_UNISTD_H |
| 20 | #include <unistd.h> |
| 21 | #endif |
| 22 | #if HAVE_SYSLOG_H |
| 23 | #include <syslog.h> |
| 24 | #else |
| 25 | #undef TESTMODE |
| 26 | #define TESTMODE 1 |
| 27 | #endif |
| 28 | #include "../liblock/config.h" |
| 29 | #include "../liblock/liblock.h" |
| 30 | #include "../numlib/numlib.h" |
| 31 | |
| 32 | static const char rcsid[]="$Id: logger.c,v 1.11 2006/06/01 10:47:33 mrsam Exp $"; |
| 33 | |
| 34 | static int do_logger(const char *name, int facility, FILE *f) |
| 35 | { |
| 36 | char buf[512]; |
| 37 | char *p; |
| 38 | int c; |
| 39 | |
| 40 | #if TESTMODE |
| 41 | |
| 42 | #else |
| 43 | openlog(name, 0 |
| 44 | |
| 45 | #ifdef LOG_NDELAY |
| 46 | | LOG_NDELAY |
| 47 | #else |
| 48 | | LOG_NOWAIT |
| 49 | #endif |
| 50 | |
| 51 | , facility); |
| 52 | #endif |
| 53 | if (chdir("/") < 0) |
| 54 | { |
| 55 | perror("chdir(\"/\")"); |
| 56 | exit(1); |
| 57 | } |
| 58 | |
| 59 | while (fgets(buf, sizeof(buf), f)) |
| 60 | { |
| 61 | if ((p=strchr(buf, '\n')) != 0) *p=0; |
| 62 | else |
| 63 | while ((c=getchar()) != EOF && c != '\n') |
| 64 | ; |
| 65 | |
| 66 | #if TESTMODE |
| 67 | fprintf(stderr, "%s: %s\n", name, buf); |
| 68 | #else |
| 69 | c=LOG_INFO; |
| 70 | if (strncmp(buf, "ERR:", 4) == 0) |
| 71 | { |
| 72 | c=LOG_ERR; |
| 73 | p=buf+4; |
| 74 | } |
| 75 | else if (strncmp(buf, "WARN:", 5) == 0) |
| 76 | { |
| 77 | c=LOG_WARNING; |
| 78 | p=buf+5; |
| 79 | } |
| 80 | else if (strncmp(buf, "ALERT:", 6) == 0) |
| 81 | { |
| 82 | c=LOG_ALERT; |
| 83 | p=buf+6; |
| 84 | } |
| 85 | else if (strncmp(buf, "CRIT:", 5) == 0) |
| 86 | { |
| 87 | c=LOG_CRIT; |
| 88 | p=buf+5; |
| 89 | } |
| 90 | else if (strncmp(buf, "DEBUG:", 6) == 0) |
| 91 | { |
| 92 | c=LOG_DEBUG; |
| 93 | p=buf+6; |
| 94 | } |
| 95 | else if (strncmp(buf, "INFO:", 5) == 0) |
| 96 | p=buf+5; |
| 97 | else p=buf; |
| 98 | |
| 99 | while (*p == ' ') |
| 100 | ++p; |
| 101 | |
| 102 | syslog(c, "%s", p); |
| 103 | #endif |
| 104 | } |
| 105 | return (0); |
| 106 | } |
| 107 | |
| 108 | static const char *namearg=0; |
| 109 | static const char *pidarg=0; |
| 110 | static char *lockfilename=0; |
| 111 | |
| 112 | struct lognames |
| 113 | { |
| 114 | char *name; |
| 115 | int value; |
| 116 | }; |
| 117 | |
| 118 | static struct lognames facilitynames[] = |
| 119 | { |
| 120 | #ifdef LOG_AUTH |
| 121 | { "auth", LOG_AUTH }, |
| 122 | #endif |
| 123 | #ifdef LOG_AUTHPRIV |
| 124 | { "authpriv", LOG_AUTHPRIV }, |
| 125 | #endif |
| 126 | #ifdef LOG_CONSOLE |
| 127 | { "console", LOG_CONSOLE }, |
| 128 | #endif |
| 129 | #ifdef LOG_CRON |
| 130 | { "cron", LOG_CRON }, |
| 131 | #endif |
| 132 | #ifdef LOG_DAEMON |
| 133 | { "daemon", LOG_DAEMON }, |
| 134 | #endif |
| 135 | #ifdef LOG_FTP |
| 136 | { "ftp", LOG_FTP }, |
| 137 | #endif |
| 138 | #ifdef LOG_KERN |
| 139 | { "kern", LOG_KERN }, |
| 140 | #endif |
| 141 | #ifdef LOG_LPR |
| 142 | { "lpr", LOG_LPR }, |
| 143 | #endif |
| 144 | #ifdef LOG_MAIL |
| 145 | { "mail", LOG_MAIL }, |
| 146 | #endif |
| 147 | #ifdef LOG_AUTHPRIV |
| 148 | { "news", LOG_NEWS }, |
| 149 | #endif |
| 150 | #ifdef LOG_SECURITY |
| 151 | { "security", LOG_SECURITY }, |
| 152 | #endif |
| 153 | #ifdef LOG_USER |
| 154 | { "user", LOG_USER }, |
| 155 | #endif |
| 156 | #ifdef LOG_UUCP |
| 157 | { "uucp", LOG_UUCP }, |
| 158 | #endif |
| 159 | #ifdef LOG_LOCAL0 |
| 160 | { "local0", LOG_LOCAL0 }, |
| 161 | #endif |
| 162 | #ifdef LOG_LOCAL1 |
| 163 | { "local1", LOG_LOCAL1 }, |
| 164 | #endif |
| 165 | #ifdef LOG_LOCAL2 |
| 166 | { "local2", LOG_LOCAL2 }, |
| 167 | #endif |
| 168 | #ifdef LOG_LOCAL3 |
| 169 | { "local3", LOG_LOCAL3 }, |
| 170 | #endif |
| 171 | #ifdef LOG_LOCAL4 |
| 172 | { "local4", LOG_LOCAL4 }, |
| 173 | #endif |
| 174 | #ifdef LOG_LOCAL5 |
| 175 | { "local5", LOG_LOCAL5 }, |
| 176 | #endif |
| 177 | #ifdef LOG_LOCAL6 |
| 178 | { "local6", LOG_LOCAL6 }, |
| 179 | #endif |
| 180 | #ifdef LOG_LOCAL7 |
| 181 | { "local7", LOG_LOCAL7 }, |
| 182 | #endif |
| 183 | { 0, 0 } |
| 184 | }; |
| 185 | |
| 186 | static int hup_restart = 0; |
| 187 | static int respawn = 0; |
| 188 | static int child_pid = -1; |
| 189 | |
| 190 | static RETSIGTYPE sighup(int n) |
| 191 | { |
| 192 | if (child_pid > 0) |
| 193 | { |
| 194 | /* The child may respond to HUP by dying. If so it will |
| 195 | close its stderr and do_logger will terminate; at that |
| 196 | point we need to restart it */ |
| 197 | hup_restart = 1; |
| 198 | kill (child_pid, SIGHUP); |
| 199 | } |
| 200 | signal(SIGHUP, sighup); |
| 201 | #if RETSIGTYPE != void |
| 202 | return (1); |
| 203 | #endif |
| 204 | } |
| 205 | |
| 206 | static RETSIGTYPE sigalrm(int n) |
| 207 | { |
| 208 | if (child_pid > 0) kill(child_pid, SIGKILL); |
| 209 | #if RETSIGTYPE != void |
| 210 | return (1); |
| 211 | #endif |
| 212 | } |
| 213 | |
| 214 | static RETSIGTYPE sigterm(int n) |
| 215 | { |
| 216 | if (child_pid > 0) |
| 217 | { |
| 218 | hup_restart = 0; |
| 219 | respawn = 0; |
| 220 | kill(child_pid, SIGTERM); |
| 221 | signal(SIGALRM, sigalrm); /* kill after 8 secs */ |
| 222 | alarm(8); |
| 223 | } |
| 224 | else exit(0); |
| 225 | #if RETSIGTYPE != void |
| 226 | return (1); |
| 227 | #endif |
| 228 | } |
| 229 | |
| 230 | static void checkfd(int actual, int exp) |
| 231 | { |
| 232 | if (actual == exp) return; |
| 233 | fprintf(stderr, "Bad fd, got %d, expected %d\n", actual, exp); |
| 234 | if (actual < 0) perror("error"); |
| 235 | exit(1); |
| 236 | } |
| 237 | |
| 238 | static int isid(const char *p) |
| 239 | { |
| 240 | while (*p) |
| 241 | { |
| 242 | if (*p < '0' || *p > '9') return (0); |
| 243 | ++p; |
| 244 | } |
| 245 | return (1); |
| 246 | } |
| 247 | |
| 248 | static void setuidgid(const char *userarg, |
| 249 | const char *grouparg) |
| 250 | { |
| 251 | if (grouparg) |
| 252 | { |
| 253 | gid_t gid = 0; |
| 254 | struct group *gr; |
| 255 | |
| 256 | if (isid(grouparg)) |
| 257 | gid=atoi(grouparg); |
| 258 | else if ((gr=getgrnam(grouparg)) == 0) |
| 259 | { |
| 260 | fprintf(stderr, "Group not found: %s\n", grouparg); |
| 261 | exit(1); |
| 262 | } |
| 263 | else gid=gr->gr_gid; |
| 264 | |
| 265 | libmail_changegroup(gid); |
| 266 | } |
| 267 | |
| 268 | if (userarg) |
| 269 | { |
| 270 | uid_t uid; |
| 271 | |
| 272 | if (isid(userarg)) |
| 273 | { |
| 274 | uid=atoi(userarg); |
| 275 | libmail_changeuidgid(uid, getgid()); |
| 276 | } |
| 277 | else |
| 278 | { |
| 279 | gid_t g=getgid(), *gp=0; |
| 280 | |
| 281 | if (grouparg) gp= &g; |
| 282 | libmail_changeusername(userarg, gp); |
| 283 | } |
| 284 | } |
| 285 | } |
| 286 | |
| 287 | |
| 288 | static void startchild(char **argv, const char *userarg, const char *grouparg) |
| 289 | { |
| 290 | pid_t p; |
| 291 | int pipefd[2]; |
| 292 | int tmp; |
| 293 | |
| 294 | signal(SIGTERM, sigterm); |
| 295 | signal(SIGHUP, sighup); |
| 296 | |
| 297 | /* Make sure the pipefds are at least 3 and 4. If we have an open |
| 298 | stderr then keep it around for debugging purposes. */ |
| 299 | close(0); |
| 300 | checkfd(open("/dev/null", O_RDWR), 0); |
| 301 | close(1); |
| 302 | checkfd(dup(0), 1); |
| 303 | if ((tmp = dup(0)) > 2) close(tmp); |
| 304 | |
| 305 | if (pipe(pipefd) < 0) |
| 306 | { |
| 307 | perror("pipe"); |
| 308 | exit(1); |
| 309 | } |
| 310 | p = fork(); |
| 311 | if (p < 0) |
| 312 | { |
| 313 | perror("fork"); |
| 314 | exit(1); |
| 315 | } |
| 316 | if (p == 0) |
| 317 | { |
| 318 | |
| 319 | close(pipefd[0]); |
| 320 | close(2); |
| 321 | checkfd(dup(pipefd[1]), 2); |
| 322 | close(pipefd[1]); |
| 323 | setuidgid(userarg, grouparg); |
| 324 | execvp(argv[0], argv); |
| 325 | perror("exec"); |
| 326 | exit(1); |
| 327 | } |
| 328 | |
| 329 | // We can close stderr now |
| 330 | |
| 331 | close(2); |
| 332 | checkfd(dup(0), 2); |
| 333 | |
| 334 | |
| 335 | close(pipefd[1]); |
| 336 | close(0); |
| 337 | checkfd(dup(pipefd[0]), 0); |
| 338 | close(pipefd[0]); |
| 339 | child_pid = p; |
| 340 | } |
| 341 | /* |
| 342 | * Note that we now support several modes of operation: |
| 343 | * |
| 344 | * (1) standalone logger, just collect messages on stdin and feed to syslog |
| 345 | * courierlogger foo |
| 346 | * courierlogger -name=foo |
| 347 | * |
| 348 | * (2) run a child process, collect its stderr messages and feed to syslog |
| 349 | * courierlogger [-name=foo] foo arg1 arg2 |
| 350 | * |
| 351 | * (3) start a detached daemon with a child process |
| 352 | * courierlogger [-name=foo] -pid=/var/run/foo.pid -start foo arg1 arg2 |
| 353 | * |
| 354 | * (4) stop or restart a detached daemon |
| 355 | * courierlogger -pid=/var/run/foo.pid -stop (or receive a SIGTERM) |
| 356 | * courierlogger -pid=/var/run/foo.pid -restart (or receive a SIGHUP) |
| 357 | */ |
| 358 | |
| 359 | int main(int argc, char **argv) |
| 360 | { |
| 361 | int facility = LOG_DEST; |
| 362 | int daemon = 0; |
| 363 | int lockfd = -1; |
| 364 | const char *userarg = 0; |
| 365 | const char *grouparg = 0; |
| 366 | int droproot=0; |
| 367 | |
| 368 | if (argc == 2 && argv[1][0] != '-') |
| 369 | { |
| 370 | /* backwards-compatibility mode */ |
| 371 | close(1); |
| 372 | close(2); |
| 373 | checkfd(open("/dev/null", O_WRONLY), 1); |
| 374 | checkfd(open("/dev/null", O_WRONLY), 2); |
| 375 | do_logger(argv[1], facility, stdin); |
| 376 | exit(0); |
| 377 | } |
| 378 | |
| 379 | if (argc <= 1) |
| 380 | { |
| 381 | fprintf(stderr, |
| 382 | |
| 383 | "Usage: courierlogger [-name=name] [-pid=pidfile] [-facility=type]\n" |
| 384 | " [-start|-stop|-restart] [cmd [args...]]\n" |
| 385 | ); |
| 386 | exit(1); |
| 387 | } |
| 388 | |
| 389 | argv++, argc--; |
| 390 | while (argc > 0 && argv[0][0]=='-') |
| 391 | { |
| 392 | if (strncmp(argv[0],"-pid=",5) == 0 && argv[0][5]) |
| 393 | { |
| 394 | pidarg=&argv[0][5]; |
| 395 | lockfilename=malloc(strlen(pidarg)+sizeof(".lock")); |
| 396 | if (!lockfilename) |
| 397 | { |
| 398 | perror("malloc"); |
| 399 | exit(1); |
| 400 | } |
| 401 | strcat(strcpy(lockfilename, pidarg), ".lock"); |
| 402 | } |
| 403 | else |
| 404 | if (strncmp(argv[0],"-name=",6) == 0 && argv[0][6]) |
| 405 | namearg=&argv[0][6]; |
| 406 | else if (strncmp(argv[0],"-user=",6) == 0) |
| 407 | userarg=argv[0]+6; |
| 408 | else if (strncmp(argv[0],"-group=",7) == 0) |
| 409 | grouparg=argv[0]+7; |
| 410 | else if (strcmp(argv[0], "-droproot") == 0) |
| 411 | droproot=1; |
| 412 | else |
| 413 | if (strncmp(argv[0],"-facility=",10) == 0) |
| 414 | { |
| 415 | struct lognames *p = facilitynames; |
| 416 | |
| 417 | while (p->name && strcmp(p->name, &argv[0][10])) |
| 418 | p++; |
| 419 | if (p->name == 0) |
| 420 | { |
| 421 | fprintf(stderr, "Unknown facility name '%s'\n", |
| 422 | &argv[0][10]); |
| 423 | exit(1); |
| 424 | } |
| 425 | facility = p->value; |
| 426 | } |
| 427 | else |
| 428 | if (strcmp(argv[0],"-start") == 0) |
| 429 | daemon = 1; |
| 430 | else |
| 431 | if (strcmp(argv[0],"-stop") == 0) |
| 432 | daemon = 2; |
| 433 | else |
| 434 | if (strcmp(argv[0],"-restart") == 0) |
| 435 | daemon = 3; |
| 436 | else |
| 437 | if (strcmp(argv[0],"-respawn") == 0) |
| 438 | respawn = 1; |
| 439 | else |
| 440 | { |
| 441 | fprintf(stderr, "Unknown option '%s'\n", argv[0]); |
| 442 | exit(1); |
| 443 | } |
| 444 | argv++, argc--; |
| 445 | } |
| 446 | |
| 447 | if (daemon && !pidarg) |
| 448 | { |
| 449 | fprintf(stderr, "-pid argument required\n"); |
| 450 | exit(1); |
| 451 | } |
| 452 | |
| 453 | if (!daemon && pidarg) |
| 454 | daemon = 1; /* -start implied */ |
| 455 | |
| 456 | if (!namearg && daemon != 2 && daemon != 3) |
| 457 | { |
| 458 | /* choose a default name based on the program we're running */ |
| 459 | if (argc <= 0 || !argv[0] || !argv[0][0]) |
| 460 | { |
| 461 | fprintf(stderr, "-name option required for standalone logger\n"); |
| 462 | exit(1); |
| 463 | } |
| 464 | namearg = strrchr(argv[0],'/'); |
| 465 | namearg = namearg ? namearg+1 : argv[0]; |
| 466 | } |
| 467 | |
| 468 | switch (daemon) |
| 469 | { |
| 470 | case 1: /* start */ |
| 471 | if (argc <= 0 || !argv[0] || !argv[0][0]) |
| 472 | { |
| 473 | fprintf(stderr, "-start must be followed by a command to execute\n"); |
| 474 | exit(1); |
| 475 | } |
| 476 | lockfd=ll_daemon_start(lockfilename); |
| 477 | if (lockfd < 0) |
| 478 | { |
| 479 | perror("ll_daemon_start"); |
| 480 | exit(1); |
| 481 | } |
| 482 | startchild(argv, droproot ? userarg:NULL, |
| 483 | droproot ? grouparg:NULL); |
| 484 | ll_daemon_started(pidarg, lockfd); |
| 485 | break; |
| 486 | case 2: /* stop */ |
| 487 | exit(ll_daemon_stop(lockfilename, pidarg)); |
| 488 | case 3: /* restart */ |
| 489 | exit(ll_daemon_restart(lockfilename, pidarg)); |
| 490 | default: /* run in foreground, with or without a child process */ |
| 491 | |
| 492 | if (argc > 0) |
| 493 | startchild(argv, droproot ? userarg:NULL, |
| 494 | droproot ? grouparg:NULL); |
| 495 | } |
| 496 | |
| 497 | setuidgid(userarg, grouparg); |
| 498 | |
| 499 | while (1) |
| 500 | { |
| 501 | int waitstat; |
| 502 | pid_t p2; |
| 503 | FILE *f = fdopen(0, "r"); |
| 504 | |
| 505 | do_logger(namearg, facility, f); |
| 506 | fclose(f); |
| 507 | if (child_pid < 0) break; |
| 508 | while ((p2=wait(&waitstat)) != child_pid && |
| 509 | (p2 != -1 || errno != ECHILD)) |
| 510 | ; |
| 511 | if (hup_restart) |
| 512 | hup_restart = 0; |
| 513 | else if (respawn) |
| 514 | sleep (5); |
| 515 | else |
| 516 | break; |
| 517 | startchild(argv, NULL, NULL); |
| 518 | } |
| 519 | exit(0); |
| 520 | } |
HCoop / hcoop / debian / courier-authlib.git / blame