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-rw-r--r--src/rc/rc-misc.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/src/rc/rc-misc.c b/src/rc/rc-misc.c
index 32fe50e3..afe7893c 100644
--- a/src/rc/rc-misc.c
+++ b/src/rc/rc-misc.c
@@ -43,6 +43,7 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <unistd.h>
#include "einfo.h"
#include "rc.h"
@@ -310,3 +311,65 @@ int signal_setup(int sig, void (*handler)(int))
sa.sa_handler = handler;
return sigaction(sig, &sa, NULL);
}
+
+pid_t exec_service(const char *service, const char *arg)
+{
+ char *file;
+ char fifo[PATH_MAX];
+ pid_t pid = -1;
+ sigset_t full;
+ sigset_t old;
+ struct sigaction sa;
+
+ file = rc_service_resolve(service);
+ if (! exists(file)) {
+ rc_service_mark(service, RC_SERVICE_STOPPED);
+ free(file);
+ return 0;
+ }
+
+ /* We create a fifo so that other services can wait until we complete */
+ snprintf(fifo, sizeof(fifo), RC_SVCDIR "/exclusive/%s",
+ basename_c(service));
+ if (mkfifo(fifo, 0600) != 0 && errno != EEXIST) {
+ free(file);
+ return -1;
+ }
+
+ /* We need to block signals until we have forked */
+ memset(&sa, 0, sizeof (sa));
+ sa.sa_handler = SIG_DFL;
+ sigemptyset(&sa.sa_mask);
+ sigfillset(&full);
+ sigprocmask(SIG_SETMASK, &full, &old);
+
+ if ((pid = fork()) == 0) {
+ /* Restore default handlers */
+ sigaction(SIGCHLD, &sa, NULL);
+ sigaction(SIGHUP, &sa, NULL);
+ sigaction(SIGINT, &sa, NULL);
+ sigaction(SIGQUIT, &sa, NULL);
+ sigaction(SIGTERM, &sa, NULL);
+ sigaction(SIGUSR1, &sa, NULL);
+ sigaction(SIGWINCH, &sa, NULL);
+
+ /* Unmask signals */
+ sigprocmask(SIG_SETMASK, &old, NULL);
+
+ /* Safe to run now */
+ execl(file, file, arg, (char *) NULL);
+ fprintf(stderr, "unable to exec `%s': %s\n",
+ file, strerror(errno));
+ unlink(fifo);
+ _exit(EXIT_FAILURE);
+ }
+
+ if (pid == -1)
+ fprintf(stderr, "fork: %s\n",strerror (errno));
+
+ sigprocmask(SIG_SETMASK, &old, NULL);
+
+ free(file);
+
+ return pid;
+}