#include <signal.h>
#include <unistd.h>
#include <fcntl.h>
+#include <errno.h>
#include <string.h>
#include <getopt.h>
#include <rpc/rpc.h>
#include <rpc/pmap_clnt.h>
#include <rpcmisc.h>
+#include <grp.h>
#include "statd.h"
#include "version.h"
fprintf(stderr," -N Run in notify only mode.\n");
}
+static const char *pidfile = "/var/run/rpc.statd.pid";
+
+int pidfd = -1;
+static void create_pidfile(void)
+{
+ FILE *fp;
+
+ unlink(pidfile);
+ fp = fopen(pidfile, "w");
+ if (!fp)
+ die("Opening %s failed: %s\n",
+ pidfile, strerror(errno));
+ fprintf(fp, "%d\n", getpid());
+ pidfd = dup(fileno(fp));
+ if (fclose(fp) < 0)
+ log(L_WARNING, "Flushing pid file failed.\n");
+}
+
+static void truncate_pidfile(void)
+{
+ if (pidfd >= 0)
+ ftruncate(pidfd, 0);
+}
+
+static void drop_privs(void)
+{
+ struct stat st;
+
+ if (stat(SM_DIR, &st) == -1 &&
+ stat(DIR_BASE, &st) == -1)
+ st.st_uid = 0;
+
+ if (st.st_uid == 0) {
+ log(L_WARNING, "statd running as root. chown %s to choose different user\n",
+ SM_DIR);
+ return;
+ }
+ /* better chown the pid file before dropping, as if it
+ * if over nfs we might loose access
+ */
+ if (pidfd >= 0)
+ fchown(pidfd, st.st_uid, st.st_gid);
+
+ setgroups(0, NULL);
+ if (setgid(st.st_gid) == -1
+ || setuid(st.st_uid) == -1) {
+ log(L_ERROR, "Fail to drop privileges");
+ exit(1);
+ }
+}
+
/*
* Entry routine/main loop.
*/
int arg;
int port = 0, out_port = 0;
+ int pipefds[2] = { -1, -1};
+ char status;
+
/* Default: daemon mode, no other options */
run_mode = 0;
daemon mode. */
}
- log_init (name_p,version_p);
-
- log_modes();
-
#ifdef SIMULATIONS
if (argc > 1)
/* LH - I _really_ need to update simulator... */
if (!(run_mode & MODE_NODAEMON)) {
int filedes, fdmax, tempfd;
+ if (pipe(pipefds)<0) {
+ perror("statd: unable to create pipe");
+ exit(1);
+ }
if ((pid = fork ()) < 0) {
- perror ("Could not fork");
+ perror ("statd: Could not fork");
exit (1);
} else if (pid != 0) {
- /* Parent. */
+ /* Parent.
+ * Wait for status from child.
+ */
+ close(pipefds[1]);
+ if (read(pipefds[0], &status, 1) != 1)
+ exit(1);
exit (0);
}
/* Child. */
+ close(pipefds[0]);
setsid ();
- chdir (DIR_BASE);
+ if (chdir (DIR_BASE) == -1) {
+ perror("statd: Could not chdir");
+ exit(1);
+ }
+ while (pipefds[1] <= 2) {
+ pipefds[1] = dup(pipefds[1]);
+ if (pipefds[1]<0) {
+ perror("statd: dup");
+ exit(1);
+ }
+ }
tempfd = open("/dev/null", O_RDWR);
close(0); dup2(tempfd, 0);
close(1); dup2(tempfd, 1);
close(2); dup2(tempfd, 2);
fdmax = sysconf (_SC_OPEN_MAX);
- for (filedes = 3; filedes < fdmax; filedes++) {
- close (filedes);
- }
+ for (filedes = 3; filedes < fdmax; filedes++)
+ if (filedes != pipefds[1])
+ close (filedes);
+
}
/* Child. */
+
+ log_init (name_p,version_p);
+
+ log_modes();
+
signal (SIGHUP, killer);
signal (SIGINT, killer);
signal (SIGTERM, killer);
/* initialize out_port */
statd_get_socket(out_port);
+ create_pidfile();
+ atexit(truncate_pidfile);
+ drop_privs();
+
for (;;) {
if (!(run_mode & MODE_NOTIFY_ONLY)) {
/* Do not do pmap_unset() when running in notify mode.
}
change_state ();
shuffle_dirs (); /* Move directory names around */
+
+ /* If we got this far, we have successfully started, so notify parent */
+ if (pipefds[1] > 0) {
+ status = 0;
+ write(pipefds[1], &status, 1);
+ close(pipefds[1]);
+ pipefds[1] = -1;
+ }
+
notify_hosts (); /* Send out notify requests */
++restart;