1/*- 2 * Copyright (c) 1999 Berkeley Software Design, Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. --- 15 unchanged lines hidden (view full) --- 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * From BSDI: daemon.c,v 1.2 1996/08/15 01:11:09 jch Exp 29 */ 30 31#include <sys/cdefs.h> |
32__FBSDID("$FreeBSD: head/usr.sbin/daemon/daemon.c 255521 2013-09-13 16:57:28Z jmg $"); |
33 34#include <sys/param.h> 35#include <sys/mman.h> 36#include <sys/wait.h> 37 38#include <err.h> 39#include <errno.h> 40#include <libutil.h> --- 7 unchanged lines hidden (view full) --- 48static void dummy_sighandler(int); 49static void restrict_process(const char *); 50static int wait_child(pid_t pid, sigset_t *mask); 51static void usage(void); 52 53int 54main(int argc, char *argv[]) 55{ |
56 struct pidfh *ppfh, *pfh; |
57 sigset_t mask, oldmask; 58 int ch, nochdir, noclose, restart; |
59 const char *pidfile, *ppidfile, *user; |
60 pid_t otherpid, pid; 61 62 nochdir = noclose = 1; 63 restart = 0; |
64 ppfh = pfh = NULL; 65 ppidfile = pidfile = user = NULL; 66 while ((ch = getopt(argc, argv, "cfp:P:ru:")) != -1) { |
67 switch (ch) { 68 case 'c': 69 nochdir = 0; 70 break; 71 case 'f': 72 noclose = 0; 73 break; 74 case 'p': 75 pidfile = optarg; 76 break; |
77 case 'P': 78 ppidfile = optarg; 79 break; |
80 case 'r': 81 restart = 1; 82 break; 83 case 'u': 84 user = optarg; 85 break; 86 default: 87 usage(); 88 } 89 } 90 argc -= optind; 91 argv += optind; 92 93 if (argc == 0) 94 usage(); 95 |
96 ppfh = pfh = NULL; |
97 /* 98 * Try to open the pidfile before calling daemon(3), 99 * to be able to report the error intelligently 100 */ 101 if (pidfile != NULL) { 102 pfh = pidfile_open(pidfile, 0600, &otherpid); 103 if (pfh == NULL) { 104 if (errno == EEXIST) { 105 errx(3, "process already running, pid: %d", 106 otherpid); 107 } 108 err(2, "pidfile ``%s''", pidfile); 109 } 110 } |
111 112 /* do same for actual daemon process */ 113 if (ppidfile != NULL) { 114 ppfh = pidfile_open(ppidfile, 0600, &otherpid); 115 if (ppfh == NULL) { 116 if (errno == EEXIST) { 117 errx(3, "process already running, pid: %d", 118 otherpid); 119 } 120 err(2, "ppidfile ``%s''", ppidfile); 121 } 122 } |
123 124 if (daemon(nochdir, noclose) == -1) 125 err(1, NULL); 126 127 /* 128 * If the pidfile or restart option is specified the daemon 129 * executes the command in a forked process and wait on child 130 * exit to remove the pidfile or restart the command. Normally --- 56 unchanged lines hidden (view full) --- 187 execvp(argv[0], argv); 188 189 /* 190 * execvp() failed -- report the error. The child is 191 * now running, so the exit status doesn't matter. 192 */ 193 err(1, "%s", argv[0]); 194 } |
195 /* write out parent pidfile if needed */ 196 if (ppidfile != NULL) 197 pidfile_write(ppfh); 198 |
199 setproctitle("%s[%d]", argv[0], pid); 200 if (wait_child(pid, &mask) == 0 && restart) { 201 sleep(1); 202 goto restart; 203 } 204 pidfile_remove(pfh); |
205 pidfile_remove(ppfh); |
206 exit(0); /* Exit status does not matter. */ 207} 208 209static void 210dummy_sighandler(int sig __unused) 211{ 212 /* Nothing to do. */ 213} --- 42 unchanged lines hidden (view full) --- 256 } 257 } 258} 259 260static void 261usage(void) 262{ 263 (void)fprintf(stderr, |
264 "usage: daemon [-cfr] [-p child_pidfile] [-P supervisor_pidfile] " 265 "[-u user]\n command arguments ...\n"); |
266 exit(1); 267} |