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 static void load_state_number(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 struct sockaddr_in *sin = nfs_getrpccaller_in(transp);
93 /* remote host authorization check */
94 if (sin->sin_family == AF_INET &&
95 !check_default("statd", sin, rqstp->rq_proc, SM_PROG)) {
96 svcerr_auth (transp, AUTH_FAILED);
100 sm_prog_1 (rqstp, transp);
103 #define sm_prog_1 sm_prog_1_wrapper
112 note (N_FATAL, "Caught signal %d, un-registering and exiting.", sig);
113 pmap_unset (SM_PROG, SM_VERS);
121 extern void my_svc_exit (void);
122 dprintf (N_DEBUG, "Caught signal %d, re-notifying (state %d).", sig,
128 * Startup information.
130 static void log_modes(void)
132 char buf[128]; /* watch stack size... */
134 /* No flags = no message */
135 if (!run_mode) return;
138 sprintf(buf,"Flags: ");
139 if (run_mode & MODE_NODAEMON)
140 strcat(buf,"No-Daemon ");
141 if (run_mode & MODE_LOG_STDERR)
142 strcat(buf,"Log-STDERR ");
148 * Since we do more than standard statd stuff, we might need to
149 * help the occasional admin.
154 fprintf(stderr,"usage: %s [options]\n", name_p);
155 fprintf(stderr," -h, -?, --help Print this help screen.\n");
156 fprintf(stderr," -F, --foreground Foreground (no-daemon mode)\n");
157 fprintf(stderr," -d, --no-syslog Verbose logging to stderr. Foreground mode only.\n");
158 fprintf(stderr," -p, --port Port to listen on\n");
159 fprintf(stderr," -o, --outgoing-port Port for outgoing connections\n");
160 fprintf(stderr," -V, -v, --version Display version information and exit.\n");
161 fprintf(stderr," -n, --name Specify a local hostname.\n");
162 fprintf(stderr," -P State directory path.\n");
163 fprintf(stderr," -N Run in notify only mode.\n");
164 fprintf(stderr," -L, --no-notify Do not perform any notification.\n");
165 fprintf(stderr," -H Specify a high-availability callout program.\n");
168 static const char *pidfile = "/var/run/rpc.statd.pid";
171 static void create_pidfile(void)
176 fp = fopen(pidfile, "w");
178 die("Opening %s failed: %s\n",
179 pidfile, strerror(errno));
180 fprintf(fp, "%d\n", getpid());
181 pidfd = dup(fileno(fp));
183 note(N_WARNING, "Flushing pid file failed.\n");
186 static void truncate_pidfile(void)
192 static void drop_privs(void)
196 if (stat(SM_DIR, &st) == -1 &&
197 stat(DIR_BASE, &st) == -1) {
202 if (st.st_uid == 0) {
203 note(N_WARNING, "statd running as root. chown %s to choose different user\n",
207 /* better chown the pid file before dropping, as if it
208 * if over nfs we might loose access
211 fchown(pidfd, st.st_uid, st.st_gid);
214 if (setgid(st.st_gid) == -1
215 || setuid(st.st_uid) == -1) {
216 note(N_ERROR, "Fail to drop privileges");
221 static void run_sm_notify(int outport)
227 av[ac++] = "/usr/sbin/sm-notify";
228 if (run_mode & MODE_NODAEMON)
231 sprintf(op, "-p%d", outport);
234 if (run_mode & STATIC_HOSTNAME) {
240 fprintf(stderr, "%s: failed to run %s\n", name_p, av[0]);
245 * Entry routine/main loop.
247 int main (int argc, char **argv)
252 int port = 0, out_port = 0;
255 int pipefds[2] = { -1, -1};
258 /* Default: daemon mode, no other options */
261 /* Set the basename */
262 if ((name_p = strrchr(argv[0],'/')) != NULL) {
268 /* Get the version */
269 if ((version_p = strrchr(VERSION,' ')) != NULL) {
278 /* Process command line switches */
279 while ((arg = getopt_long(argc, argv, "h?vVFNH:dn:p:o:P:L", longopts, NULL)) != EOF) {
281 case 'V': /* Version */
283 printf("%s version %s\n",name_p,version_p);
285 case 'F': /* Foreground/nodaemon mode */
286 run_mode |= MODE_NODAEMON;
289 run_mode |= MODE_NOTIFY_ONLY;
291 case 'L': /* Listen only */
292 run_mode |= MODE_NO_NOTIFY;
294 case 'd': /* No daemon only - log to stderr */
295 run_mode |= MODE_LOG_STDERR;
298 out_port = atoi(optarg);
299 if (out_port < 1 || out_port > 65535) {
300 fprintf(stderr, "%s: bad port number: %s\n",
308 if (port < 1 || port > 65535) {
309 fprintf(stderr, "%s: bad port number: %s\n",
315 case 'n': /* Specify local hostname */
316 run_mode |= STATIC_HOSTNAME;
317 MY_NAME = xstrdup(optarg);
321 if ((DIR_BASE = xstrdup(optarg)) == NULL) {
322 fprintf(stderr, "%s: xstrdup(%s) failed!\n",
327 SM_DIR = xmalloc(strlen(DIR_BASE) + 1 + sizeof("sm"));
328 SM_BAK_DIR = xmalloc(strlen(DIR_BASE) + 1 + sizeof("sm.bak"));
329 SM_STAT_PATH = xmalloc(strlen(DIR_BASE) + 1 + sizeof("state"));
332 || (SM_BAK_DIR == NULL)
333 || (SM_STAT_PATH == NULL)) {
335 fprintf(stderr, "%s: xmalloc() failed!\n",
339 if (DIR_BASE[strlen(DIR_BASE)-1] == '/') {
340 sprintf(SM_DIR, "%ssm", DIR_BASE );
341 sprintf(SM_BAK_DIR, "%ssm.bak", DIR_BASE );
342 sprintf(SM_STAT_PATH, "%sstate", DIR_BASE );
344 sprintf(SM_DIR, "%s/sm", DIR_BASE );
345 sprintf(SM_BAK_DIR, "%s/sm.bak", DIR_BASE );
346 sprintf(SM_STAT_PATH, "%s/state", DIR_BASE );
349 case 'H': /* PRC: specify the ha-callout program */
350 if ((ha_callout_prog = xstrdup(optarg)) == NULL) {
351 fprintf(stderr, "%s: xstrdup(%s) failed!\n",
356 case '?': /* heeeeeelllllllpppp? heh */
360 default: /* oh dear ... heh */
366 if (port == out_port && port != 0) {
367 fprintf(stderr, "Listening and outgoing ports cannot be the same!\n");
371 if (run_mode & MODE_NOTIFY_ONLY) {
372 fprintf(stderr, "%s: -N deprecated, consider using /usr/sbin/sm-notify directly\n",
374 run_sm_notify(out_port);
378 if (!(run_mode & MODE_NODAEMON)) {
379 run_mode &= ~MODE_LOG_STDERR; /* Never log to console in
383 if (getrlimit (RLIMIT_NOFILE, &rlim) != 0)
384 fprintf(stderr, "%s: getrlimit (RLIMIT_NOFILE) failed: %s\n",
385 argv [0], strerror(errno));
387 /* glibc sunrpc code dies if getdtablesize > FD_SETSIZE */
388 if (rlim.rlim_cur > FD_SETSIZE) {
389 rlim.rlim_cur = FD_SETSIZE;
391 if (setrlimit (RLIMIT_NOFILE, &rlim) != 0) {
392 fprintf(stderr, "%s: setrlimit (RLIMIT_NOFILE) failed: %s\n",
393 argv [0], strerror(errno));
400 /* LH - I _really_ need to update simulator... */
401 simulator (--argc, ++argv); /* simulator() does exit() */
404 if (!(run_mode & MODE_NODAEMON)) {
407 if (pipe(pipefds)<0) {
408 perror("statd: unable to create pipe");
411 if ((pid = fork ()) < 0) {
412 perror ("statd: Could not fork");
414 } else if (pid != 0) {
416 * Wait for status from child.
419 if (read(pipefds[0], &status, 1) != 1)
426 if (chdir (DIR_BASE) == -1) {
427 perror("statd: Could not chdir");
431 while (pipefds[1] <= 2) {
432 pipefds[1] = dup(pipefds[1]);
434 perror("statd: dup");
438 tempfd = open("/dev/null", O_RDWR);
449 log_init (/*name_p,version_p*/);
453 signal (SIGHUP, killer);
454 signal (SIGINT, killer);
455 signal (SIGTERM, killer);
456 /* PRC: trap SIGUSR1 to re-read notify list from disk */
457 signal(SIGUSR1, sigusr);
458 /* WARNING: the following works on Linux and SysV, but not BSD! */
459 signal(SIGCHLD, SIG_IGN);
461 * Ignore SIGPIPE to avoid statd dying when peers close their
462 * TCP connection while we're trying to reply to them.
464 signal(SIGPIPE, SIG_IGN);
467 atexit(truncate_pidfile);
469 if (! (run_mode & MODE_NO_NOTIFY))
470 switch (pid = fork()) {
472 run_sm_notify(out_port);
477 waitpid(pid, NULL, 0);
480 /* Make sure we have a privilege port for calling into the kernel */
481 if (statd_get_socket() < 0)
484 /* If sm-notify didn't take all the state files, load
485 * state information into our notify-list so we can
486 * pass on any SM_NOTIFY that arrives
490 pmap_unset (SM_PROG, SM_VERS);
492 /* this registers both UDP and TCP services */
493 rpc_init("statd", SM_PROG, SM_VERS, sm_prog_1, port);
495 /* If we got this far, we have successfully started, so notify parent */
496 if (pipefds[1] > 0) {
498 write(pipefds[1], &status, 1);
507 * Handle incoming requests: SM_NOTIFY socket requests, as
508 * well as callbacks from lockd.
510 my_svc_run(); /* I rolled my own, Olaf made it better... */
512 /* Only get here when simulating a crash so we should probably
513 * start sm-notify running again. As we have already dropped
514 * privileges, this might not work, but I don't think
515 * responding to SM_SIMU_CRASH is an important use cases to
518 if (! (run_mode & MODE_NO_NOTIFY))
519 switch (pid = fork()) {
521 run_sm_notify(out_port);
526 waitpid(pid, NULL, 0);
534 load_state_number(void)
538 if ((fd = open(SM_STAT_PATH, O_RDONLY)) == -1)
541 read(fd, &MY_STATE, sizeof(MY_STATE));
543 fd = open("/proc/sys/fs/nfs/nsm_local_state",O_WRONLY);
546 snprintf(buf, sizeof(buf), "%d", MY_STATE);
547 write(fd, buf, strlen(buf));