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authorEric Andersen <andersen@codepoet.org>2002-01-26 09:04:45 +0000
committerEric Andersen <andersen@codepoet.org>2002-01-26 09:04:45 +0000
commit53a2299230976b93d3bbe81ad92dad8c23d0b271 (patch)
tree9999687b999f7bc0647fae38ee0ca20c066d53de
parent467a18b1d94dbcdc9f750e52d09f6579037fbff5 (diff)
downloadbusybox-53a2299230976b93d3bbe81ad92dad8c23d0b271.tar.gz
Patch from Russ Dill <Russ.Dill@asu.edu>. From the
start-stop-daemon man page: -b|--background Typically used with programs that don't detach on their own. This option will force start-stop-daemon to fork before starting the process, and force it into the background. WARNING: start-stop-daemon cannot check the exit status if the process fails to execute for any reason. This is a last resort, and is only meant for programs that either make no sense forking on their own, or where it's not feasible to add the code for it to do this itself. This is usefull for applets like watchdog
-rw-r--r--debianutils/start_stop_daemon.c11
-rw-r--r--init/start_stop_daemon.c11
2 files changed, 20 insertions, 2 deletions
diff --git a/debianutils/start_stop_daemon.c b/debianutils/start_stop_daemon.c
index c6b704329..ed4503caf 100644
--- a/debianutils/start_stop_daemon.c
+++ b/debianutils/start_stop_daemon.c
@@ -22,6 +22,7 @@
static int start = 0;
static int stop = 0;
+static int fork_before_exec = 0;
static int signal_nr = 15;
static int user_id = -1;
static const char *userspec = NULL;
@@ -55,7 +56,7 @@ parse_options(int argc, char * const *argv)
int c;
for (;;) {
- c = getopt (argc, argv, "a:n:s:u:x:KS");
+ c = getopt (argc, argv, "a:n:s:u:x:KSb");
if (c == EOF)
break;
switch (c) {
@@ -81,6 +82,9 @@ parse_options(int argc, char * const *argv)
case 'x':
execname = optarg;
break;
+ case 'b':
+ fork_before_exec = 1;
+ break;
default:
show_usage();
}
@@ -255,6 +259,11 @@ start_stop_daemon_main(int argc, char **argv)
return EXIT_SUCCESS;
}
*--argv = startas;
+ if (fork_before_exec) {
+ if (daemon(0, 0) == -1)
+ perror_msg_and_die ("unable to fork");
+ }
+ setsid();
execv(startas, argv);
perror_msg_and_die ("unable to start %s", startas);
}
diff --git a/init/start_stop_daemon.c b/init/start_stop_daemon.c
index c6b704329..ed4503caf 100644
--- a/init/start_stop_daemon.c
+++ b/init/start_stop_daemon.c
@@ -22,6 +22,7 @@
static int start = 0;
static int stop = 0;
+static int fork_before_exec = 0;
static int signal_nr = 15;
static int user_id = -1;
static const char *userspec = NULL;
@@ -55,7 +56,7 @@ parse_options(int argc, char * const *argv)
int c;
for (;;) {
- c = getopt (argc, argv, "a:n:s:u:x:KS");
+ c = getopt (argc, argv, "a:n:s:u:x:KSb");
if (c == EOF)
break;
switch (c) {
@@ -81,6 +82,9 @@ parse_options(int argc, char * const *argv)
case 'x':
execname = optarg;
break;
+ case 'b':
+ fork_before_exec = 1;
+ break;
default:
show_usage();
}
@@ -255,6 +259,11 @@ start_stop_daemon_main(int argc, char **argv)
return EXIT_SUCCESS;
}
*--argv = startas;
+ if (fork_before_exec) {
+ if (daemon(0, 0) == -1)
+ perror_msg_and_die ("unable to fork");
+ }
+ setsid();
execv(startas, argv);
perror_msg_and_die ("unable to start %s", startas);
}