diff options
| -rw-r--r-- | sysdep/unix/main.c | 65 |
1 files changed, 63 insertions, 2 deletions
diff --git a/sysdep/unix/main.c b/sysdep/unix/main.c index bd80ba2c..c7db7c81 100644 --- a/sysdep/unix/main.c +++ b/sysdep/unix/main.c @@ -473,6 +473,58 @@ cli_init_unix(uid_t use_uid, gid_t use_gid) } /* + * PID file + */ + +static char *pid_file; +static int pid_fd; + +static inline void +open_pid_file(void) +{ + if (!pid_file) + return; + + pid_fd = open(pid_file, O_WRONLY|O_CREAT, 0664); + if (pid_fd < 0) + die("Cannot create PID file %s: %m", pid_file); +} + +static inline void +write_pid_file(void) +{ + int pl, rv; + char ps[24]; + + if (!pid_file) + return; + + /* We don't use PID file for uniqueness, so no need for locking */ + + pl = bsnprintf(ps, sizeof(ps), "%ld\n", (long) getpid()); + if (pl < 0) + bug("PID buffer too small"); + + rv = ftruncate(pid_fd, 0); + if (rv < 0) + die("fruncate: %m"); + + rv = write(pid_fd, ps, pl); + if(rv < 0) + die("write: %m"); + + close(pid_fd); +} + +static inline void +unlink_pid_file(void) +{ + if (pid_file) + unlink(pid_file); +} + + +/* * Shutdown */ @@ -496,6 +548,7 @@ async_shutdown(void) void sysdep_shutdown_done(void) { + unlink_pid_file(); unlink(path_control_socket); log_msg(L_FATAL "Shutdown completed"); exit(0); @@ -548,7 +601,7 @@ signal_init(void) * Parsing of command-line arguments */ -static char *opt_list = "c:dD:ps:u:g:"; +static char *opt_list = "c:dD:ps:P:u:g:"; static int parse_and_exit; char *bird_name; static char *use_user; @@ -557,7 +610,7 @@ static char *use_group; static void usage(void) { - fprintf(stderr, "Usage: %s [-c <config-file>] [-d] [-D <debug-file>] [-p] [-s <control-socket>] [-u <user>] [-g <group>]\n", bird_name); + fprintf(stderr, "Usage: %s [-c <config-file>] [-d] [-D <debug-file>] [-p] [-s <control-socket>] [-P <pid-file>] [-u <user>] [-g <group>]\n", bird_name); exit(1); } @@ -656,6 +709,9 @@ parse_args(int argc, char **argv) case 's': path_control_socket = optarg; break; + case 'P': + pid_file = optarg; + break; case 'u': use_user = optarg; break; @@ -709,6 +765,9 @@ main(int argc, char **argv) if (use_uid) drop_uid(use_uid); + if (!parse_and_exit) + open_pid_file(); + protos_build(); proto_build(&proto_unix_kernel); proto_build(&proto_unix_iface); @@ -733,6 +792,8 @@ main(int argc, char **argv) dup2(0, 2); } + write_pid_file(); + signal_init(); #ifdef LOCAL_DEBUG |