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' },
76 extern void sm_prog_1 (struct svc_req *, register SVCXPRT *);
77 extern int statd_get_socket(void);
80 extern void simulator (int, char **);
84 #ifdef HAVE_TCP_WRAPPER
85 #include "tcpwrapper.h"
88 sm_prog_1_wrapper (struct svc_req *rqstp, register SVCXPRT *transp)
90 /* remote host authorization check */
91 if (!check_default("statd", svc_getcaller(transp),
92 rqstp->rq_proc, SM_PROG)) {
93 svcerr_auth (transp, AUTH_FAILED);
97 sm_prog_1 (rqstp, transp);
100 #define sm_prog_1 sm_prog_1_wrapper
109 note (N_FATAL, "Caught signal %d, un-registering and exiting.", sig);
110 pmap_unset (SM_PROG, SM_VERS);
118 extern void my_svc_exit (void);
119 dprintf (N_DEBUG, "Caught signal %d, re-notifying (state %d).", sig,
125 * Startup information.
127 static void log_modes(void)
129 char buf[128]; /* watch stack size... */
131 /* No flags = no message */
132 if (!run_mode) return;
135 sprintf(buf,"Flags: ");
136 if (run_mode & MODE_NODAEMON)
137 strcat(buf,"No-Daemon ");
138 if (run_mode & MODE_LOG_STDERR)
139 strcat(buf,"Log-STDERR ");
145 * Since we do more than standard statd stuff, we might need to
146 * help the occasional admin.
151 fprintf(stderr,"usage: %s [options]\n", name_p);
152 fprintf(stderr," -h, -?, --help Print this help screen.\n");
153 fprintf(stderr," -F, --foreground Foreground (no-daemon mode)\n");
154 fprintf(stderr," -d, --no-syslog Verbose logging to stderr. Foreground mode only.\n");
155 fprintf(stderr," -p, --port Port to listen on\n");
156 fprintf(stderr," -o, --outgoing-port Port for outgoing connections\n");
157 fprintf(stderr," -V, -v, --version Display version information and exit.\n");
158 fprintf(stderr," -n, --name Specify a local hostname.\n");
159 fprintf(stderr," -P State directory path.\n");
160 fprintf(stderr," -N Run in notify only mode.\n");
161 fprintf(stderr," -H Specify a high-availability callout program.\n");
164 static const char *pidfile = "/var/run/rpc.statd.pid";
167 static void create_pidfile(void)
172 fp = fopen(pidfile, "w");
174 die("Opening %s failed: %s\n",
175 pidfile, strerror(errno));
176 fprintf(fp, "%d\n", getpid());
177 pidfd = dup(fileno(fp));
179 note(N_WARNING, "Flushing pid file failed.\n");
182 static void truncate_pidfile(void)
188 static void drop_privs(void)
192 if (stat(SM_DIR, &st) == -1 &&
193 stat(DIR_BASE, &st) == -1) {
198 if (st.st_uid == 0) {
199 note(N_WARNING, "statd running as root. chown %s to choose different user\n",
203 /* better chown the pid file before dropping, as if it
204 * if over nfs we might loose access
207 fchown(pidfd, st.st_uid, st.st_gid);
210 if (setgid(st.st_gid) == -1
211 || setuid(st.st_uid) == -1) {
212 note(N_ERROR, "Fail to drop privileges");
217 static void run_sm_notify(int outport)
223 av[ac++] = "/usr/sbin/sm-notify";
224 if (run_mode & MODE_NODAEMON)
227 sprintf(op, "-p%d", outport);
230 if (run_mode & STATIC_HOSTNAME) {
235 fprintf(stderr, "%s: -N deprecated, consider using /usr/sbin/sm-notify directly\n",
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:", 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 'd': /* No daemon only - log to stderr */
290 run_mode |= MODE_LOG_STDERR;
293 out_port = atoi(optarg);
294 if (out_port < 1 || out_port > 65535) {
295 fprintf(stderr, "%s: bad port number: %s\n",
303 if (port < 1 || port > 65535) {
304 fprintf(stderr, "%s: bad port number: %s\n",
310 case 'n': /* Specify local hostname */
311 run_mode |= STATIC_HOSTNAME;
312 MY_NAME = xstrdup(optarg);
316 if ((DIR_BASE = xstrdup(optarg)) == NULL) {
317 fprintf(stderr, "%s: xstrdup(%s) failed!\n",
322 SM_DIR = xmalloc(strlen(DIR_BASE) + 1 + sizeof("sm"));
323 SM_BAK_DIR = xmalloc(strlen(DIR_BASE) + 1 + sizeof("sm.bak"));
324 SM_STAT_PATH = xmalloc(strlen(DIR_BASE) + 1 + sizeof("state"));
327 || (SM_BAK_DIR == NULL)
328 || (SM_STAT_PATH == NULL)) {
330 fprintf(stderr, "%s: xmalloc() failed!\n",
334 if (DIR_BASE[strlen(DIR_BASE)-1] == '/') {
335 sprintf(SM_DIR, "%ssm", DIR_BASE );
336 sprintf(SM_BAK_DIR, "%ssm.bak", DIR_BASE );
337 sprintf(SM_STAT_PATH, "%sstate", DIR_BASE );
339 sprintf(SM_DIR, "%s/sm", DIR_BASE );
340 sprintf(SM_BAK_DIR, "%s/sm.bak", DIR_BASE );
341 sprintf(SM_STAT_PATH, "%s/state", DIR_BASE );
344 case 'H': /* PRC: specify the ha-callout program */
345 if ((ha_callout_prog = xstrdup(optarg)) == NULL) {
346 fprintf(stderr, "%s: xstrdup(%s) failed!\n",
351 case '?': /* heeeeeelllllllpppp? heh */
355 default: /* oh dear ... heh */
361 if (port == out_port && port != 0) {
362 fprintf(stderr, "Listening and outgoing ports cannot be the same!\n");
366 if (run_mode & MODE_NOTIFY_ONLY)
367 run_sm_notify(out_port);
370 if (!(run_mode & MODE_NODAEMON)) {
371 run_mode &= ~MODE_LOG_STDERR; /* Never log to console in
375 if (getrlimit (RLIMIT_NOFILE, &rlim) != 0)
376 fprintf(stderr, "%s: getrlimit (RLIMIT_NOFILE) failed: %s\n",
377 argv [0], strerror(errno));
379 /* glibc sunrpc code dies if getdtablesize > FD_SETSIZE */
380 if (rlim.rlim_cur > FD_SETSIZE) {
381 rlim.rlim_cur = FD_SETSIZE;
383 if (setrlimit (RLIMIT_NOFILE, &rlim) != 0) {
384 fprintf(stderr, "%s: setrlimit (RLIMIT_NOFILE) failed: %s\n",
385 argv [0], strerror(errno));
392 /* LH - I _really_ need to update simulator... */
393 simulator (--argc, ++argv); /* simulator() does exit() */
396 if (!(run_mode & MODE_NODAEMON)) {
399 if (pipe(pipefds)<0) {
400 perror("statd: unable to create pipe");
403 if ((pid = fork ()) < 0) {
404 perror ("statd: Could not fork");
406 } else if (pid != 0) {
408 * Wait for status from child.
411 if (read(pipefds[0], &status, 1) != 1)
418 if (chdir (DIR_BASE) == -1) {
419 perror("statd: Could not chdir");
423 while (pipefds[1] <= 2) {
424 pipefds[1] = dup(pipefds[1]);
426 perror("statd: dup");
430 tempfd = open("/dev/null", O_RDWR);
441 log_init (name_p,version_p);
445 signal (SIGHUP, killer);
446 signal (SIGINT, killer);
447 signal (SIGTERM, killer);
448 /* PRC: trap SIGUSR1 to re-read notify list from disk */
449 signal(SIGUSR1, sigusr);
450 /* WARNING: the following works on Linux and SysV, but not BSD! */
451 signal(SIGCHLD, SIG_IGN);
453 * Ignore SIGPIPE to avoid statd dying when peers close their
454 * TCP connection while we're trying to reply to them.
456 signal(SIGPIPE, SIG_IGN);
459 atexit(truncate_pidfile);
461 switch (pid = fork()) {
463 run_sm_notify(out_port);
468 waitpid(pid, NULL, 0);
474 pmap_unset (SM_PROG, SM_VERS);
476 /* If we got this far, we have successfully started, so notify parent */
477 if (pipefds[1] > 0) {
479 write(pipefds[1], &status, 1);
484 /* this registers both UDP and TCP services */
485 rpc_init("statd", SM_PROG, SM_VERS, sm_prog_1, port);
488 * Handle incoming requests: SM_NOTIFY socket requests, as
489 * well as callbacks from lockd.
491 my_svc_run(); /* I rolled my own, Olaf made it better... */
493 /* Only get here when simulating a crash so we should probably
494 * start sm-notify running again. As we have already dropped
495 * privileges, this might not work, but I don't think
496 * responding to SM_SIMU_CRASH is an important use cases to
499 switch (pid = fork()) {
501 run_sm_notify(out_port);
506 waitpid(pid, NULL, 0);