diff options
author | Lennart Poettering <lennart@poettering.net> | 2003-07-31 14:18:41 +0000 |
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committer | Lennart Poettering <lennart@poettering.net> | 2003-07-31 14:18:41 +0000 |
commit | e774e8ef3467e81ed502e19b1719b4ab384d0083 (patch) | |
tree | 8eb9ee6196c383347cb2be00ec389d5c177b5d17 /src/dpid.c |
Moved to trunk
git-svn-id: file:///home/lennart/svn/public/libdaemon/trunk@38 153bfa13-eec0-0310-be40-b0cb6a0e1b4b
Diffstat (limited to 'src/dpid.c')
-rw-r--r-- | src/dpid.c | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/src/dpid.c b/src/dpid.c new file mode 100644 index 0000000..6d91cae --- /dev/null +++ b/src/dpid.c @@ -0,0 +1,124 @@ +/* + * This file is part of libdaemon. + * + * libdaemon is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * libdaemon is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with libdaemon; if not, write to the Free Software Foundation, + * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. + */ + +#include <limits.h> +#include <stdio.h> +#include <stdlib.h> +#include <signal.h> +#include <string.h> +#include <unistd.h> +#include <errno.h> +#include <sys/types.h> +#include <sys/stat.h> + +#include "dpid.h" +#include "dlog.h" + +#define VARRUN "/var/run" + +const char *daemon_pid_file_ident = 0; +daemon_pid_file_proc_t daemon_pid_file_proc = daemon_pid_file_proc_default; + +const char *daemon_pid_file_proc_default(void) { + static char fn[PATH_MAX]; + snprintf(fn, sizeof(fn), "%s/%s.pid", VARRUN, daemon_pid_file_ident ? daemon_pid_file_ident : "unknown"); + return fn; +} + +pid_t daemon_pid_file_is_running(void) { + const char *fn; + static char txt[256]; + FILE *f; + pid_t pid; + + + if (!(fn = daemon_pid_file_proc())) + return (pid_t) -1; + + if (!(f = fopen(fn, "r"))) + return (pid_t) -1; + + if (!(fgets(txt, sizeof(txt), f))) { + daemon_log(LOG_WARNING, "PID file corrupt, removing. (%s)", fn); + unlink(fn); + fclose(f); + return (pid_t) -1; + } + + fclose(f); + + if ((pid = (pid_t) atoi(txt)) <= 0) { + daemon_log(LOG_WARNING, "PID file corrupt, removing. (%s)", fn); + unlink(fn); + return (pid_t) -1; + } + + if (kill(pid, 0) != 0 && errno != EPERM) { + daemon_log(LOG_WARNING, "Daemon %u killed: %s; removing PID file. (%s)", pid, strerror(errno), fn); + unlink(fn); + return (pid_t) -1; + } + + return pid; +} + +int daemon_pid_file_kill(int s) { + pid_t pid; + + if ((pid = daemon_pid_file_is_running()) < 0) + return -1; + + if (kill(pid, s) < 0) + return -1; + + return 0; +} + +int daemon_pid_file_create(void) { + const char *fn; + FILE *f; + mode_t save; + + if (!(fn = daemon_pid_file_proc())) + return -1; + + save = umask(022); + + if (!(f = fopen(fn, "w"))) + return -1; + + fprintf(f, "%u\n", getpid()); + fclose(f); + + umask(save); + + return 0; +} + +int daemon_pid_file_remove(void) { + const char *fn; + + if (!(fn = daemon_pid_file_proc())) + return -1; + + if (unlink(fn) < 0) + return -1; + + return 0; +} + |