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usr.sbin/daemon/daemon.c

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* From BSDI: daemon.c,v 1.2 1996/08/15 01:11:09 jch Exp * From BSDI: daemon.c,v 1.2 1996/08/15 01:11:09 jch Exp
*/ */
#include <sys/cdefs.h> #include <sys/cdefs.h>
__FBSDID("$FreeBSD$"); __FBSDID("$FreeBSD$");
#include <sys/param.h> #include <sys/param.h>
#include <sys/mman.h> #include <sys/mman.h>
#include <sys/stat.h>
#include <sys/wait.h> #include <sys/wait.h>
#include <fcntl.h> #include <fcntl.h>
#include <err.h> #include <err.h>
#include <errno.h> #include <errno.h>
#include <libutil.h> #include <libutil.h>
#include <login_cap.h> #include <login_cap.h>
#include <pwd.h> #include <pwd.h>
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int int
main(int argc, char *argv[]) main(int argc, char *argv[])
{ {
const char *pidfile, *ppidfile, *title, *user, *outfn, *logtag; const char *pidfile, *ppidfile, *title, *user, *outfn, *logtag;
int ch, nochdir, noclose, restart, dosyslog, child_eof; int ch, nochdir, noclose, restart, dosyslog, child_eof;
sigset_t mask_susp, mask_orig, mask_read, mask_term; sigset_t mask_susp, mask_orig, mask_read, mask_term;
struct log_params logpar; struct log_params logpar;
int pfd[2] = { -1, -1 }, outfd = -1; int pfd[2] = { -1, -1 }, outfd = -1;
int stdmask, logpri, logfac, mask; int stdmask, logpri, logfac;
struct pidfh *ppfh, *pfh; struct pidfh *ppfh, *pfh;
char *p; char *p;
memset(&logpar, 0, sizeof(logpar)); memset(&logpar, 0, sizeof(logpar));
stdmask = STDOUT_FILENO | STDERR_FILENO; stdmask = STDOUT_FILENO | STDERR_FILENO;
ppidfile = pidfile = user = NULL; ppidfile = pidfile = user = NULL;
nochdir = noclose = 1; nochdir = noclose = 1;
logpri = LOG_NOTICE; logpri = LOG_NOTICE;
logfac = LOG_DAEMON; logfac = LOG_DAEMON;
logtag = "daemon"; logtag = "daemon";
restart = 0; restart = 0;
dosyslog = 0; dosyslog = 0;
outfn = NULL; outfn = NULL;
title = NULL; title = NULL;
mask = -1; while ((ch = getopt(argc, argv, "cfSp:P:ru:o:s:l:t:l:m:R:T:")) != -1) {
while ((ch = getopt(argc, argv, "cfSp:P:ru:o:s:l:t:l:m:M:R:T:")) != -1) {
switch (ch) { switch (ch) {
case 'c': case 'c':
nochdir = 0; nochdir = 0;
break; break;
case 'f': case 'f':
noclose = 0; noclose = 0;
break; break;
case 'l': case 'l':
Show All 19 Lines while ((ch = getopt(argc, argv, "cfSp:P:ru:o:s:l:t:l:m:R:T:")) != -1) {
case 'r': case 'r':
restart = 1; restart = 1;
break; break;
case 'R': case 'R':
restart = strtol(optarg, &p, 0); restart = strtol(optarg, &p, 0);
if (p == optarg || restart < 1) if (p == optarg || restart < 1)
errx(6, "invalid restart delay"); errx(6, "invalid restart delay");
break; break;
case 'M':
mask = strtol(optarg, &p, 8);
if (p == optarg || mask < 0 || mask > 0777)
errx(6, "unrecognized umask");
break;
case 's': case 's':
logpri = get_log_mapping(optarg, prioritynames); logpri = get_log_mapping(optarg, prioritynames);
if (logpri == -1) if (logpri == -1)
errx(4, "unrecognized syslog priority"); errx(4, "unrecognized syslog priority");
dosyslog = 1; dosyslog = 1;
break; break;
case 'S': case 'S':
dosyslog = 1; dosyslog = 1;
▲ Show 20 Lines • Show All 150 Lines • ▼ Show 20 Lines if (pid == 0) {
if (stdmask & STDOUT_FILENO) { if (stdmask & STDOUT_FILENO) {
if (dup2(pfd[1], STDOUT_FILENO) == -1) if (dup2(pfd[1], STDOUT_FILENO) == -1)
err(1, "dup2"); err(1, "dup2");
} }
if (pfd[1] != STDERR_FILENO && if (pfd[1] != STDERR_FILENO &&
pfd[1] != STDOUT_FILENO) pfd[1] != STDOUT_FILENO)
close(pfd[1]); close(pfd[1]);
} }
/* Set umask if requested */
if (mask > 0)
umask(mask);
execvp(argv[0], argv); execvp(argv[0], argv);
/* /*
* execvp() failed -- report the error. The child is * execvp() failed -- report the error. The child is
* now running, so the exit status doesn't matter. * now running, so the exit status doesn't matter.
*/ */
err(1, "%s", argv[0]); err(1, "%s", argv[0]);
} }
setproctitle("%s[%d]", title, (int)pid); setproctitle("%s[%d]", title, (int)pid);
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static void static void
usage(void) usage(void)
{ {
(void)fprintf(stderr, (void)fprintf(stderr,
"usage: daemon [-cfrS] [-p child_pidfile] [-P supervisor_pidfile]\n" "usage: daemon [-cfrS] [-p child_pidfile] [-P supervisor_pidfile]\n"
" [-u user] [-o output_file] [-t title]\n" " [-u user] [-o output_file] [-t title]\n"
" [-l syslog_facility] [-s syslog_priority]\n" " [-l syslog_facility] [-s syslog_priority]\n"
" [-T syslog_tag] [-m output_mask] [-R restart_delay_secs]\n" " [-T syslog_tag] [-m output_mask] [-R restart_delay_secs]\n"
" [-M umask]\n"
"command arguments ...\n"); "command arguments ...\n");
exit(1); exit(1);
} }