2 * Copyright (C) 1995, 1997-1999 Jeffrey A. Uphoff
3 * Modified by Olaf Kirch, Oct. 1996.
4 * Modified by H.J. Lu, 1998.
5 * Modified by L. Hohberger of Mission Critical Linux, 2000.
23 #include <rpc/pmap_clnt.h>
25 #include <sys/resource.h>
32 /* Socket operations */
33 #include <sys/types.h>
34 #include <sys/socket.h>
36 /* Added to enable specification of state directory path at run-time
37 * j_carlos_gomez@yahoo.com
40 char * DIR_BASE = DEFAULT_DIR_BASE;
42 char * SM_DIR = DEFAULT_SM_DIR;
43 char * SM_BAK_DIR = DEFAULT_SM_BAK_DIR;
44 char * SM_STAT_PATH = DEFAULT_SM_STAT_PATH;
46 /* ----- end of state directory path stuff ------- */
48 int run_mode = 0; /* foreground logging mode */
50 /* LH - I had these local to main, but it seemed silly to have
51 * two copies of each - one in main(), one static in log.c...
52 * It also eliminates the 256-char static in log.c */
54 const char *version_p = NULL;
56 /* PRC: a high-availability callout program can be specified with -H
57 * When this is done, the program will receive callouts whenever clients
58 * are added or deleted to the notify list */
59 char *ha_callout_prog = NULL;
61 static struct option longopts[] =
63 { "foreground", 0, 0, 'F' },
64 { "no-syslog", 0, 0, 'd' },
65 { "help", 0, 0, 'h' },
66 { "version", 0, 0, 'v' },
67 { "outgoing-port", 1, 0, 'o' },
68 { "port", 1, 0, 'p' },
69 { "name", 1, 0, 'n' },
70 { "state-directory-path", 1, 0, 'P' },
71 { "notify-mode", 0, 0, 'N' },
72 { "ha-callout", 1, 0, 'H' },
73 { "no-notify", 0, 0, 'L' },
77 extern void sm_prog_1 (struct svc_req *, register SVCXPRT *);
78 extern int statd_get_socket(void);
81 extern void simulator (int, char **);
85 #ifdef HAVE_TCP_WRAPPER
86 #include "tcpwrapper.h"
89 sm_prog_1_wrapper (struct svc_req *rqstp, register SVCXPRT *transp)
91 /* remote host authorization check */
92 if (!check_default("statd", svc_getcaller(transp),
93 rqstp->rq_proc, SM_PROG)) {
94 svcerr_auth (transp, AUTH_FAILED);
98 sm_prog_1 (rqstp, transp);
101 #define sm_prog_1 sm_prog_1_wrapper
110 note (N_FATAL, "Caught signal %d, un-registering and exiting.", sig);
111 pmap_unset (SM_PROG, SM_VERS);
119 extern void my_svc_exit (void);
120 dprintf (N_DEBUG, "Caught signal %d, re-notifying (state %d).", sig,
126 * Startup information.
128 static void log_modes(void)
130 char buf[128]; /* watch stack size... */
132 /* No flags = no message */
133 if (!run_mode) return;
136 sprintf(buf,"Flags: ");
137 if (run_mode & MODE_NODAEMON)
138 strcat(buf,"No-Daemon ");
139 if (run_mode & MODE_LOG_STDERR)
140 strcat(buf,"Log-STDERR ");
146 * Since we do more than standard statd stuff, we might need to
147 * help the occasional admin.
152 fprintf(stderr,"usage: %s [options]\n", name_p);
153 fprintf(stderr," -h, -?, --help Print this help screen.\n");
154 fprintf(stderr," -F, --foreground Foreground (no-daemon mode)\n");
155 fprintf(stderr," -d, --no-syslog Verbose logging to stderr. Foreground mode only.\n");
156 fprintf(stderr," -p, --port Port to listen on\n");
157 fprintf(stderr," -o, --outgoing-port Port for outgoing connections\n");
158 fprintf(stderr," -V, -v, --version Display version information and exit.\n");
159 fprintf(stderr," -n, --name Specify a local hostname.\n");
160 fprintf(stderr," -P State directory path.\n");
161 fprintf(stderr," -N Run in notify only mode.\n");
162 fprintf(stderr," -L, --no-notify Do not perform any notification.\n");
163 fprintf(stderr," -H Specify a high-availability callout program.\n");
166 static const char *pidfile = "/var/run/rpc.statd.pid";
169 static void create_pidfile(void)
174 fp = fopen(pidfile, "w");
176 die("Opening %s failed: %s\n",
177 pidfile, strerror(errno));
178 fprintf(fp, "%d\n", getpid());
179 pidfd = dup(fileno(fp));
181 note(N_WARNING, "Flushing pid file failed.\n");
184 static void truncate_pidfile(void)
190 static void drop_privs(void)
194 if (stat(SM_DIR, &st) == -1 &&
195 stat(DIR_BASE, &st) == -1) {
200 if (st.st_uid == 0) {
201 note(N_WARNING, "statd running as root. chown %s to choose different user\n",
205 /* better chown the pid file before dropping, as if it
206 * if over nfs we might loose access
209 fchown(pidfd, st.st_uid, st.st_gid);
212 if (setgid(st.st_gid) == -1
213 || setuid(st.st_uid) == -1) {
214 note(N_ERROR, "Fail to drop privileges");
219 static void run_sm_notify(int outport)
225 av[ac++] = "/usr/sbin/sm-notify";
226 if (run_mode & MODE_NODAEMON)
229 sprintf(op, "-p%d", outport);
232 if (run_mode & STATIC_HOSTNAME) {
238 fprintf(stderr, "%s: failed to run %s\n", name_p, av[0]);
243 * Entry routine/main loop.
245 int main (int argc, char **argv)
250 int port = 0, out_port = 0;
253 int pipefds[2] = { -1, -1};
256 /* Default: daemon mode, no other options */
259 /* Set the basename */
260 if ((name_p = strrchr(argv[0],'/')) != NULL) {
266 /* Get the version */
267 if ((version_p = strrchr(VERSION,' ')) != NULL) {
276 /* Process command line switches */
277 while ((arg = getopt_long(argc, argv, "h?vVFNH:dn:p:o:P:L", longopts, NULL)) != EOF) {
279 case 'V': /* Version */
281 printf("%s version %s\n",name_p,version_p);
283 case 'F': /* Foreground/nodaemon mode */
284 run_mode |= MODE_NODAEMON;
287 run_mode |= MODE_NOTIFY_ONLY;
289 case 'L': /* Listen only */
290 run_mode |= MODE_NO_NOTIFY;
292 case 'd': /* No daemon only - log to stderr */
293 run_mode |= MODE_LOG_STDERR;
296 out_port = atoi(optarg);
297 if (out_port < 1 || out_port > 65535) {
298 fprintf(stderr, "%s: bad port number: %s\n",
306 if (port < 1 || port > 65535) {
307 fprintf(stderr, "%s: bad port number: %s\n",
313 case 'n': /* Specify local hostname */
314 run_mode |= STATIC_HOSTNAME;
315 MY_NAME = xstrdup(optarg);
319 if ((DIR_BASE = xstrdup(optarg)) == NULL) {
320 fprintf(stderr, "%s: xstrdup(%s) failed!\n",
325 SM_DIR = xmalloc(strlen(DIR_BASE) + 1 + sizeof("sm"));
326 SM_BAK_DIR = xmalloc(strlen(DIR_BASE) + 1 + sizeof("sm.bak"));
327 SM_STAT_PATH = xmalloc(strlen(DIR_BASE) + 1 + sizeof("state"));
330 || (SM_BAK_DIR == NULL)
331 || (SM_STAT_PATH == NULL)) {
333 fprintf(stderr, "%s: xmalloc() failed!\n",
337 if (DIR_BASE[strlen(DIR_BASE)-1] == '/') {
338 sprintf(SM_DIR, "%ssm", DIR_BASE );
339 sprintf(SM_BAK_DIR, "%ssm.bak", DIR_BASE );
340 sprintf(SM_STAT_PATH, "%sstate", DIR_BASE );
342 sprintf(SM_DIR, "%s/sm", DIR_BASE );
343 sprintf(SM_BAK_DIR, "%s/sm.bak", DIR_BASE );
344 sprintf(SM_STAT_PATH, "%s/state", DIR_BASE );
347 case 'H': /* PRC: specify the ha-callout program */
348 if ((ha_callout_prog = xstrdup(optarg)) == NULL) {
349 fprintf(stderr, "%s: xstrdup(%s) failed!\n",
354 case '?': /* heeeeeelllllllpppp? heh */
358 default: /* oh dear ... heh */
364 if (port == out_port && port != 0) {
365 fprintf(stderr, "Listening and outgoing ports cannot be the same!\n");
369 if (run_mode & MODE_NOTIFY_ONLY) {
370 fprintf(stderr, "%s: -N deprecated, consider using /usr/sbin/sm-notify directly\n",
372 run_sm_notify(out_port);
376 if (!(run_mode & MODE_NODAEMON)) {
377 run_mode &= ~MODE_LOG_STDERR; /* Never log to console in
381 if (getrlimit (RLIMIT_NOFILE, &rlim) != 0)
382 fprintf(stderr, "%s: getrlimit (RLIMIT_NOFILE) failed: %s\n",
383 argv [0], strerror(errno));
385 /* glibc sunrpc code dies if getdtablesize > FD_SETSIZE */
386 if (rlim.rlim_cur > FD_SETSIZE) {
387 rlim.rlim_cur = FD_SETSIZE;
389 if (setrlimit (RLIMIT_NOFILE, &rlim) != 0) {
390 fprintf(stderr, "%s: setrlimit (RLIMIT_NOFILE) failed: %s\n",
391 argv [0], strerror(errno));
398 /* LH - I _really_ need to update simulator... */
399 simulator (--argc, ++argv); /* simulator() does exit() */
402 if (!(run_mode & MODE_NODAEMON)) {
405 if (pipe(pipefds)<0) {
406 perror("statd: unable to create pipe");
409 if ((pid = fork ()) < 0) {
410 perror ("statd: Could not fork");
412 } else if (pid != 0) {
414 * Wait for status from child.
417 if (read(pipefds[0], &status, 1) != 1)
424 if (chdir (DIR_BASE) == -1) {
425 perror("statd: Could not chdir");
429 while (pipefds[1] <= 2) {
430 pipefds[1] = dup(pipefds[1]);
432 perror("statd: dup");
436 tempfd = open("/dev/null", O_RDWR);
447 log_init (name_p,version_p);
451 signal (SIGHUP, killer);
452 signal (SIGINT, killer);
453 signal (SIGTERM, killer);
454 /* PRC: trap SIGUSR1 to re-read notify list from disk */
455 signal(SIGUSR1, sigusr);
456 /* WARNING: the following works on Linux and SysV, but not BSD! */
457 signal(SIGCHLD, SIG_IGN);
459 * Ignore SIGPIPE to avoid statd dying when peers close their
460 * TCP connection while we're trying to reply to them.
462 signal(SIGPIPE, SIG_IGN);
465 atexit(truncate_pidfile);
467 if (! (run_mode & MODE_NO_NOTIFY))
468 switch (pid = fork()) {
470 run_sm_notify(out_port);
475 waitpid(pid, NULL, 0);
478 /* Make sure we have a privilege port for calling into the kernel */
481 /* If sm-notify didn't take all the state files, load
482 * state information into our notify-list so we can
483 * pass on any SM_NOTIFY that arrives
487 pmap_unset (SM_PROG, SM_VERS);
489 /* this registers both UDP and TCP services */
490 rpc_init("statd", SM_PROG, SM_VERS, sm_prog_1, port);
492 /* If we got this far, we have successfully started, so notify parent */
493 if (pipefds[1] > 0) {
495 write(pipefds[1], &status, 1);
504 * Handle incoming requests: SM_NOTIFY socket requests, as
505 * well as callbacks from lockd.
507 my_svc_run(); /* I rolled my own, Olaf made it better... */
509 /* Only get here when simulating a crash so we should probably
510 * start sm-notify running again. As we have already dropped
511 * privileges, this might not work, but I don't think
512 * responding to SM_SIMU_CRASH is an important use cases to
515 if (! (run_mode & MODE_NO_NOTIFY))
516 switch (pid = fork()) {
518 run_sm_notify(out_port);
523 waitpid(pid, NULL, 0);