- patch from Denis Vlasenko to add and use bb_xdaemon()

debianutils/start_stop_daemon.c

@@ -275,8 +275,7 @@ start_stop_daemon_main(int argc, char **argv)
 	}
 	*--argv = startas;
 	if (opt & SSD_OPT_BACKGROUND) {
-		if (daemon(0, 0) == -1)
-			bb_perror_msg_and_die ("unable to fork");
+		bb_xdaemon(0, 0);
 		setsid();
 	}
 	if (opt & SSD_OPT_MAKEPID) {

include/libbb.h

@@ -146,6 +146,7 @@ extern void  bb_fflush_stdout_and_exit(int retval) ATTRIBUTE_NORETURN;
 
 extern void xstat(const char *filename, struct stat *buf);
 extern int  bb_xsocket(int domain, int type, int protocol);
+extern void bb_xdaemon(int nochdir, int noclose);
 
 #define BB_GETOPT_ERROR 0x80000000UL
 extern const char *bb_opt_complementally;

libbb/Makefile.in

@@ -30,7 +30,7 @@ LIBBB-y:= \
 	trim.c u_signal_names.c vdprintf.c verror_msg.c \
 	vherror_msg.c vperror_msg.c wfopen.c xconnect.c xgetcwd.c xstat.c \
 	xgethostbyname.c xgethostbyname2.c xreadlink.c xregcomp.c xgetlarg.c \
-	bb_xsocket.c \
+	bb_xsocket.c bb_xdaemon.c \
 	get_terminal_width_height.c fclose_nonstdin.c fflush_stdout_and_exit.c \
 	getopt_ulflags.c default_error_retval.c wfopen_input.c speed_table.c \
 	perror_nomsg_and_die.c perror_nomsg.c skip_whitespace.c bb_askpass.c \

libbb/bb_xdaemon.c

@@ -0,0 +1,17 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * bb_xdaemon.c - a daemon() which dies on failure with error message
+ *
+ * Copyright (C) 2006 Denis Vlasenko
+ *
+ * Licensed under LGPL, see file docs/lesser.txt in this tarball for details.
+ */
+#include <unistd.h>
+#include "libbb.h"
+
+void bb_xdaemon(int nochdir, int noclose)
+{
+	if (daemon(nochdir, noclose))
+		bb_perror_msg_and_die("daemon");
+}
+

miscutils/crond.c

@@ -1,3 +1,4 @@
+/* vi: set sw=4 ts=4: */
 /*
  * crond -d[#] -c <crondir> -f -b
  *
@@ -213,9 +214,7 @@ int crond_main(int ac, char **av)
 		/* reexec for vfork() do continue parent */
 		vfork_daemon_rexec(1, 0, ac, av, "-f");
 #else							/* uClinux */
-		if (daemon(1, 0) < 0) {
-			bb_perror_msg_and_die("daemon");
-		}
+		bb_xdaemon(1, 0);
 #endif							/* uClinux */
 	}
 

miscutils/watchdog.c

@@ -40,8 +40,7 @@ int watchdog_main(int argc, char **argv)
 	if (optind < argc - 1 || argc == 1)
 		bb_show_usage();
 
-	if (daemon(0, 1) < 0)
-		bb_perror_msg_and_die("Failed forking watchdog daemon");
+	bb_xdaemon(0, 1);
 
 	signal(SIGHUP, watchdog_shutdown);
 	signal(SIGINT, watchdog_shutdown);

networking/dnsd.c

@@ -5,6 +5,7 @@
  * Copyright (C) 2005 Roberto A. Foglietta (me@roberto.foglietta.name)
  * Copyright (C) 2005 Odd Arild Olsen (oao at fibula dot no)
  * Copyright (C) 2003 Paul Sheer
+ *
  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
  *
  * Odd Arild Olsen started out with the sheerdns [1] of Paul Sheer and rewrote
@@ -408,9 +409,7 @@ int dnsd_main(int argc, char **argv)
 		/* reexec for vfork() do continue parent */
 		vfork_daemon_rexec(1, 0, argc, argv, "-d");
 #else							/* uClinux */
-		if (daemon(1, 0) < 0) {
-			bb_perror_msg_and_die("daemon");
-		}
+		bb_xdaemon(1, 0);
 #endif							/* uClinuvx */
 
 	dnsentryinit(is_verbose());

networking/httpd.c

@@ -1,3 +1,4 @@
+/* vi: set sw=4 ts=4: */
 /*
  * httpd implementation for busybox
  *
@@ -2114,8 +2115,7 @@ int httpd_main(int argc, char *argv[])
 
 #if !ENABLE_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
 # if !DEBUG
-  if (daemon(1, 0) < 0)     /* don`t change curent directory */
-	bb_perror_msg_and_die("daemon");
+  bb_xdaemon(1, 0);     /* don`t change curent directory */
 # endif
   return miniHttpd(server);
 #else

networking/inetd.c

@@ -1314,7 +1314,7 @@ inetd_main (int argc, char *argv[])
 	/* reexec for vfork() do continue parent */
 	vfork_daemon_rexec (0, 0, argc, argv, "-f");
 #else
-	daemon (0, 0);
+	daemon (0, 0); /* bb_xdaemon? */
 #endif /* uClinux */
   } else {
 	setsid ();
@@ -1802,3 +1802,4 @@ daytime_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED)
   (void) sendto (s, buffer, strlen (buffer), 0, &sa, sizeof (sa));
 }
 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME */
+/* vi: set sw=4 ts=4: */

networking/telnetd.c

@@ -1,4 +1,4 @@
-/* vi:set ts=4:*/
+/* vi: set sw=4 ts=4: */
 /*
  * Simple telnet server
  * Bjorn Wesen, Axis Communications AB (bjornw@axis.com)
@@ -469,9 +469,7 @@ telnetd_main(int argc, char **argv)
 		bb_perror_msg_and_die("listen");
 	}
 
-	if (daemon(0, 0) < 0)
-		bb_perror_msg_and_die("daemon");
-
+	bb_xdaemon(0, 0);
 
 	maxfd = master_fd;
 #endif /* CONFIG_FEATURE_TELNETD_INETD */

sysklogd/klogd.c

@@ -121,8 +121,7 @@ int klogd_main(int argc, char **argv)
 #if defined(__uClinux__)
 		vfork_daemon_rexec(0, 1, argc, argv, "-n");
 #else /* __uClinux__ */
-		if (daemon(0, 1) < 0)
-			bb_perror_msg_and_die("daemon");
+		bb_xdaemon(0, 1);
 #endif /* __uClinux__ */
 	}
 	doKlogd(console_log_level);

sysklogd/syslogd.c

@@ -673,8 +673,7 @@ int syslogd_main(int argc, char **argv)
 #if defined(__uClinux__)
 		vfork_daemon_rexec(0, 1, argc, argv, "-n");
 #else /* __uClinux__ */
-		if(daemon(0, 1) < 0)
-			bb_perror_msg_and_die("daemon");
+		bb_xdaemon(0, 1);
 #endif /* __uClinux__ */
 	}
 	doSyslogd();