-/* $Id$ */
-
/***
This file is part of PulseAudio.
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
- published by the Free Software Foundation; either version 2 of the
+ published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
PulseAudio is distributed in the hope that it will be useful, but
#endif
#include <pulse/xmalloc.h>
-#include <pulse/util.h>
#include <pulsecore/core-error.h>
#include <pulsecore/core-util.h>
if (pa_atou(t, &pid) < 0) {
pa_log_warn("Failed to parse PID file '%s'", fn);
+ errno = EINVAL;
return (pid_t) -1;
}
}
static int open_pid_file(const char *fn, int mode) {
- int fd = -1;
+ int fd;
pa_assert(fn);
for (;;) {
struct stat st;
- if ((fd = open(fn, mode
-#ifdef O_NOCTTY
- |O_NOCTTY
-#endif
+ if ((fd = pa_open_cloexec(fn, mode
#ifdef O_NOFOLLOW
|O_NOFOLLOW
#endif
goto fail;
}
- /* Does the file still exist in the file system? When ye, w're done, otherwise restart */
+ /* Does the file still exist in the file system? When yes, we're done, otherwise restart */
if (st.st_nlink >= 1)
break;
fd = -1;
goto fail;
}
-
- fd = -1;
}
return fd;
fail:
if (fd >= 0) {
+ int saved_errno = errno;
pa_lock_fd(fd, 0);
pa_close(fd);
+ errno = saved_errno;
}
return -1;
}
+static int proc_name_ours(pid_t pid, const char *procname) {
+#ifdef __linux__
+ char bn[PATH_MAX];
+ FILE *f;
+
+ pa_snprintf(bn, sizeof(bn), "/proc/%lu/stat", (unsigned long) pid);
+
+ if (!(f = pa_fopen_cloexec(bn, "r"))) {
+ pa_log_info("Failed to open %s: %s", bn, pa_cstrerror(errno));
+ return -1;
+ } else {
+ char *expected;
+ pa_bool_t good;
+ char stored[64];
+
+ if (!(fgets(stored, sizeof(stored), f))) {
+ int saved_errno = feof(f) ? EINVAL : errno;
+ pa_log_info("Failed to read from %s: %s", bn, feof(f) ? "EOF" : pa_cstrerror(errno));
+ fclose(f);
+
+ errno = saved_errno;
+ return -1;
+ }
+
+ fclose(f);
+
+ expected = pa_sprintf_malloc("%lu (%s)", (unsigned long) pid, procname);
+ good = pa_startswith(stored, expected);
+ pa_xfree(expected);
+
+/*#if !defined(__OPTIMIZE__)*/
+ if (!good) {
+ /* libtool likes to rename our binary names ... */
+ expected = pa_sprintf_malloc("%lu (lt-%s)", (unsigned long) pid, procname);
+ good = pa_startswith(stored, expected);
+ pa_xfree(expected);
+ }
+/*#endif*/
+
+ return !!good;
+ }
+#else
+
+ return 1;
+#endif
+
+}
+
/* Create a new PID file for the current process. */
-int pa_pid_file_create(void) {
+int pa_pid_file_create(const char *procname) {
int fd = -1;
int ret = -1;
- char fn[PATH_MAX];
char t[20];
pid_t pid;
size_t l;
+ char *fn;
#ifdef OS_IS_WIN32
HANDLE process;
#endif
- pa_runtime_path("pid", fn, sizeof(fn));
+ if (!(fn = pa_runtime_path("pid")))
+ goto fail;
if ((fd = open_pid_file(fn, O_CREAT|O_RDWR)) < 0)
goto fail;
if ((pid = read_pid(fn, fd)) == (pid_t) -1)
pa_log_warn("Corrupt PID file, overwriting.");
else if (pid > 0) {
+ int ours = 1;
+
#ifdef OS_IS_WIN32
if ((process = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, pid)) != NULL) {
CloseHandle(process);
#else
if (kill(pid, 0) >= 0 || errno != ESRCH) {
#endif
- pa_log("Daemon already running.");
- goto fail;
+
+ if (procname)
+ if ((ours = proc_name_ours(pid, procname)) < 0) {
+ pa_log_warn("Could not check to see if pid %lu is a pulseaudio process. "
+ "Assuming it is and the daemon is already running.", (unsigned long) pid);
+ goto fail;
+ }
+
+ if (ours) {
+ pa_log("Daemon already running.");
+ ret = 1;
+ goto fail;
+ }
}
pa_log_warn("Stale PID file, overwriting.");
}
/* Overwrite the current PID file */
- if (lseek(fd, 0, SEEK_SET) == (off_t) -1 || ftruncate(fd, 0) < 0) {
+ if (lseek(fd, (off_t) 0, SEEK_SET) == (off_t) -1 || ftruncate(fd, (off_t) 0) < 0) {
pa_log("Failed to truncate PID file '%s': %s", fn, pa_cstrerror(errno));
goto fail;
}
}
}
+ pa_xfree(fn);
+
return ret;
}
/* Remove the PID file, if it is ours */
int pa_pid_file_remove(void) {
int fd = -1;
- char fn[PATH_MAX];
+ char *fn;
int ret = -1;
pid_t pid;
- pa_runtime_path("pid", fn, sizeof(fn));
+ if (!(fn = pa_runtime_path("pid")))
+ goto fail;
if ((fd = open_pid_file(fn, O_RDWR)) < 0) {
pa_log_warn("Failed to open PID file '%s': %s", fn, pa_cstrerror(errno));
goto fail;
}
- if (ftruncate(fd, 0) < 0) {
+ if (ftruncate(fd, (off_t) 0) < 0) {
pa_log_warn("Failed to truncate PID file '%s': %s", fn, pa_cstrerror(errno));
goto fail;
}
#ifdef OS_IS_WIN32
pa_lock_fd(fd, 0);
- close(fd);
+ pa_close(fd);
fd = -1;
#endif
}
}
+ pa_xfree(fn);
+
return ret;
}
* exists and the PID therein too. Returns 0 on succcess, -1
* otherwise. If pid is non-NULL and a running daemon was found,
* return its PID therein */
-int pa_pid_file_check_running(pid_t *pid, const char *binary_name) {
- return pa_pid_file_kill(0, pid, binary_name);
+int pa_pid_file_check_running(pid_t *pid, const char *procname) {
+ return pa_pid_file_kill(0, pid, procname);
}
#ifndef OS_IS_WIN32
/* Kill a current running daemon. Return non-zero on success, -1
* otherwise. If successful *pid contains the PID of the daemon
* process. */
-int pa_pid_file_kill(int sig, pid_t *pid, const char *binary_name) {
+int pa_pid_file_kill(int sig, pid_t *pid, const char *procname) {
int fd = -1;
- char fn[PATH_MAX];
+ char *fn;
int ret = -1;
pid_t _pid;
#ifdef __linux__
char *e = NULL;
#endif
+
if (!pid)
pid = &_pid;
- pa_runtime_path("pid", fn, sizeof(fn));
+ if (!(fn = pa_runtime_path("pid")))
+ goto fail;
+
+ if ((fd = open_pid_file(fn, O_RDONLY)) < 0) {
+
+ if (errno == ENOENT)
+ errno = ESRCH;
- if ((fd = open_pid_file(fn, O_RDONLY)) < 0)
goto fail;
+ }
if ((*pid = read_pid(fn, fd)) == (pid_t) -1)
goto fail;
-#ifdef __linux__
- if (binary_name) {
- pa_snprintf(fn, sizeof(fn), "/proc/%lu/exe", (unsigned long) pid);
-
- if ((e = pa_readlink(fn))) {
- char *f = pa_path_get_filename(e);
- if (strcmp(f, binary_name)
-#if defined(__OPTIMIZE__)
- /* libtool likes to rename our binary names ... */
- && !(pa_startswith(f, "lt-") && strcmp(f+3, binary_name) == 0)
-#endif
- )
- goto fail;
+ if (procname) {
+ int ours;
+
+ if ((ours = proc_name_ours(*pid, procname)) < 0)
+ goto fail;
+
+ if (!ours) {
+ errno = ESRCH;
+ goto fail;
}
}
-#endif
ret = kill(*pid, sig);
fail:
if (fd >= 0) {
+ int saved_errno = errno;
pa_lock_fd(fd, 0);
pa_close(fd);
+ errno = saved_errno;
}
#ifdef __linux__
pa_xfree(e);
#endif
+ pa_xfree(fn);
+
return ret;
}