* Enterprises, see ``http://www.vix.com''.
*/
+static char objcopyright[] =
+"$Id: dhcpd.c,v 1.26 1996/08/27 09:44:54 mellon Exp $ Copyright 1995, 1996 The Internet Software Consortium.";
static char copyright[] =
"Copyright 1995, 1996 The Internet Software Consortium.";
static char arr [] = "All rights reserved.";
static void usage PROTO ((void));
TIME cur_time;
-TIME default_lease_time = 43200; /* 12 hours... */
-TIME max_lease_time = 86400; /* 24 hours... */
-struct tree_cache *global_options [256];
+struct group root_group;
struct iaddr server_identifier;
int server_identifier_matched;
int argc;
char **argv, **envp;
{
- int i;
+ int i, status;
struct sockaddr_in name;
struct servent *ent;
+ int pidfilewritten = 0;
#ifndef DEBUG
int pid;
+ char pbuf [20];
+ int daemon = 1;
+ int log_perror = 0;
#endif
+ /* Initially, log errors to stderr as well as to syslogd. */
#ifdef SYSLOG_4_2
- openlog ("dhcpd", LOG_NDELAY);
- log_priority = LOG_DAEMON;
+ openlog ("dhcpd", LOG_NDELAY | LOG_PERROR);
+ log_priority = DHCPD_LOG_FACILITY;
#else
- openlog ("dhcpd", LOG_NDELAY, LOG_DAEMON);
+ openlog ("dhcpd", LOG_NDELAY | LOG_PERROR, DHCPD_LOG_FACILITY);
#endif
-#ifndef NO_PUTENV
- /* ensure mktime() calls are processed in UTC */
- putenv("TZ=GMT0");
-#endif /* !NO_PUTENV */
-
#ifndef DEBUG
#ifndef SYSLOG_4_2
setlogmask (LOG_UPTO (LOG_INFO));
#endif
-
- /* Become a daemon... */
- if ((pid = fork ()) < 0)
- error ("Can't fork daemon: %m");
- else if (pid)
- exit (0);
- /* Become session leader and get pid... */
- pid = setsid ();
#endif
note (message);
note (copyright);
server_port = htons (atoi (argv [i]));
debug ("binding to user-specified port %d",
ntohs (server_port));
+ } else if (!strcmp (argv [i], "-f")) {
+#ifndef DEBUG
+ daemon = 0;
+#endif
+ } else if (!strcmp (argv [i], "-d")) {
+#ifndef DEBUG
+ daemon = 0;
+ log_perror = 1;
+#endif
} else if (argv [i][0] == '-') {
usage ();
} else {
}
}
+ /* If the user didn't ask for debug mode, close the log and
+ reopen it without the LOG_STDERR flag. */
+#ifndef DEBUG
+ if (!log_perror) {
+ closelog ();
+
+#ifdef SYSLOG_4_2
+ openlog ("dhcpd", LOG_NDELAY);
+ log_priority = DHCPD_LOG_FACILITY;
+#else
+ openlog ("dhcpd", LOG_NDELAY, DHCPD_LOG_FACILITY);
+#endif
+
+#ifndef SYSLOG_4_2
+ setlogmask (LOG_UPTO (LOG_INFO));
+#endif
+ }
+
+ if (daemon) {
+ /* Become a daemon... */
+ if ((pid = fork ()) < 0)
+ error ("Can't fork daemon: %m");
+ else if (pid)
+ exit (0);
+ /* Become session leader and get pid... */
+ pid = setsid ();
+ }
+
+ /* Read previous pid file. */
+ if ((i = open (_PATH_DHCPD_PID, O_RDONLY)) >= 0) {
+ status = read (i, pbuf, (sizeof pbuf) - 1);
+ close (i);
+ pbuf [status] = 0;
+ pid = atoi (pbuf);
+
+ /* If the previous server process is not still running,
+ write a new pid file immediately. */
+ if (pid && kill (pid, 0) < 0) {
+ unlink (_PATH_DHCPD_PID);
+ if ((i = open (_PATH_DHCPD_PID,
+ O_WRONLY | O_CREAT, 0640)) >= 0) {
+ sprintf (pbuf, "%d\n", (int)getpid ());
+ write (i, pbuf, strlen (pbuf));
+ close (i);
+ pidfilewritten = 1;
+ }
+ }
+ }
+#endif /* !DEBUG */
+
/* Default to the DHCP/BOOTP port. */
if (!server_port)
{
/* Discover all the network interfaces and initialize them. */
discover_interfaces ();
- /* Write a pid file. */
- unlink (_PATH_DHCPD_PID);
- if ((i = open (_PATH_DHCPD_PID, O_WRONLY | O_CREAT, 0640)) >= 0) {
- char obuf [20];
- sprintf (obuf, "%d\n", (int)getpid ());
- write (i, obuf, strlen (obuf));
- close (i);
+#ifndef DEBUG
+ /* If we didn't write the pid file earlier because we found a
+ process running the logged pid, but we made it to here,
+ meaning nothing is listening on the bootp port, then write
+ the pid file out - what's in it now is bogus anyway. */
+ if (!pidfilewritten) {
+ unlink (_PATH_DHCPD_PID);
+ if ((i = open (_PATH_DHCPD_PID,
+ O_WRONLY | O_CREAT, 0640)) >= 0) {
+ sprintf (pbuf, "%d\n", (int)getpid ());
+ write (i, pbuf, strlen (pbuf));
+ close (i);
+ pidfilewritten = 1;
+ }
}
+#endif /* !DEBUG */
/* Receive packets and dispatch them... */
dispatch ();
static void usage ()
{
- error ("Usage: dhcpd [-p <port>] [-a <ip-addr>]");
+ error ("Usage: dhcpd [-p <port>] [-f] [if0 [...ifN]]");
}
void cleanup ()
* Enterprises, see ``http://www.vix.com''.
*/
+static char objcopyright[] =
+"$Id: dhcpd.c,v 1.26 1996/08/27 09:44:54 mellon Exp $ Copyright 1995, 1996 The Internet Software Consortium.";
static char copyright[] =
"Copyright 1995, 1996 The Internet Software Consortium.";
static char arr [] = "All rights reserved.";
static void usage PROTO ((void));
TIME cur_time;
-TIME default_lease_time = 43200; /* 12 hours... */
-TIME max_lease_time = 86400; /* 24 hours... */
-struct tree_cache *global_options [256];
+struct group root_group;
struct iaddr server_identifier;
int server_identifier_matched;
int argc;
char **argv, **envp;
{
- int i;
+ int i, status;
struct sockaddr_in name;
struct servent *ent;
+ int pidfilewritten = 0;
#ifndef DEBUG
int pid;
+ char pbuf [20];
+ int daemon = 1;
+ int log_perror = 0;
#endif
+ /* Initially, log errors to stderr as well as to syslogd. */
#ifdef SYSLOG_4_2
- openlog ("dhcpd", LOG_NDELAY);
- log_priority = LOG_DAEMON;
+ openlog ("dhcpd", LOG_NDELAY | LOG_PERROR);
+ log_priority = DHCPD_LOG_FACILITY;
#else
- openlog ("dhcpd", LOG_NDELAY, LOG_DAEMON);
+ openlog ("dhcpd", LOG_NDELAY | LOG_PERROR, DHCPD_LOG_FACILITY);
#endif
-#ifndef NO_PUTENV
- /* ensure mktime() calls are processed in UTC */
- putenv("TZ=GMT0");
-#endif /* !NO_PUTENV */
-
#ifndef DEBUG
#ifndef SYSLOG_4_2
setlogmask (LOG_UPTO (LOG_INFO));
#endif
-
- /* Become a daemon... */
- if ((pid = fork ()) < 0)
- error ("Can't fork daemon: %m");
- else if (pid)
- exit (0);
- /* Become session leader and get pid... */
- pid = setsid ();
#endif
note (message);
note (copyright);
server_port = htons (atoi (argv [i]));
debug ("binding to user-specified port %d",
ntohs (server_port));
+ } else if (!strcmp (argv [i], "-f")) {
+#ifndef DEBUG
+ daemon = 0;
+#endif
+ } else if (!strcmp (argv [i], "-d")) {
+#ifndef DEBUG
+ daemon = 0;
+ log_perror = 1;
+#endif
} else if (argv [i][0] == '-') {
usage ();
} else {
}
}
+ /* If the user didn't ask for debug mode, close the log and
+ reopen it without the LOG_STDERR flag. */
+#ifndef DEBUG
+ if (!log_perror) {
+ closelog ();
+
+#ifdef SYSLOG_4_2
+ openlog ("dhcpd", LOG_NDELAY);
+ log_priority = DHCPD_LOG_FACILITY;
+#else
+ openlog ("dhcpd", LOG_NDELAY, DHCPD_LOG_FACILITY);
+#endif
+
+#ifndef SYSLOG_4_2
+ setlogmask (LOG_UPTO (LOG_INFO));
+#endif
+ }
+
+ if (daemon) {
+ /* Become a daemon... */
+ if ((pid = fork ()) < 0)
+ error ("Can't fork daemon: %m");
+ else if (pid)
+ exit (0);
+ /* Become session leader and get pid... */
+ pid = setsid ();
+ }
+
+ /* Read previous pid file. */
+ if ((i = open (_PATH_DHCPD_PID, O_RDONLY)) >= 0) {
+ status = read (i, pbuf, (sizeof pbuf) - 1);
+ close (i);
+ pbuf [status] = 0;
+ pid = atoi (pbuf);
+
+ /* If the previous server process is not still running,
+ write a new pid file immediately. */
+ if (pid && kill (pid, 0) < 0) {
+ unlink (_PATH_DHCPD_PID);
+ if ((i = open (_PATH_DHCPD_PID,
+ O_WRONLY | O_CREAT, 0640)) >= 0) {
+ sprintf (pbuf, "%d\n", (int)getpid ());
+ write (i, pbuf, strlen (pbuf));
+ close (i);
+ pidfilewritten = 1;
+ }
+ }
+ }
+#endif /* !DEBUG */
+
/* Default to the DHCP/BOOTP port. */
if (!server_port)
{
/* Discover all the network interfaces and initialize them. */
discover_interfaces ();
- /* Write a pid file. */
- unlink (_PATH_DHCPD_PID);
- if ((i = open (_PATH_DHCPD_PID, O_WRONLY | O_CREAT, 0640)) >= 0) {
- char obuf [20];
- sprintf (obuf, "%d\n", (int)getpid ());
- write (i, obuf, strlen (obuf));
- close (i);
+#ifndef DEBUG
+ /* If we didn't write the pid file earlier because we found a
+ process running the logged pid, but we made it to here,
+ meaning nothing is listening on the bootp port, then write
+ the pid file out - what's in it now is bogus anyway. */
+ if (!pidfilewritten) {
+ unlink (_PATH_DHCPD_PID);
+ if ((i = open (_PATH_DHCPD_PID,
+ O_WRONLY | O_CREAT, 0640)) >= 0) {
+ sprintf (pbuf, "%d\n", (int)getpid ());
+ write (i, pbuf, strlen (pbuf));
+ close (i);
+ pidfilewritten = 1;
+ }
}
+#endif /* !DEBUG */
/* Receive packets and dispatch them... */
dispatch ();
static void usage ()
{
- error ("Usage: dhcpd [-p <port>] [-a <ip-addr>]");
+ error ("Usage: dhcpd [-p <port>] [-f] [if0 [...ifN]]");
}
void cleanup ()
projects / thirdparty / dhcp.git / commitdiff
