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authorMax Kellermann <max@duempel.org>2009-11-07 18:55:16 +0100
committerMax Kellermann <max@duempel.org>2009-11-07 18:55:16 +0100
commite3af0032b236dc52d4a74c4d740e57a1f6d520aa (patch)
tree3984233a9b639e71ad80b4f6598539de3a27a008 /src/output
parent9b21152600071ec46c021c8ba3b2ef69c90f039f (diff)
downloadmpd-e3af0032b236dc52d4a74c4d740e57a1f6d520aa.tar.gz
mpd-e3af0032b236dc52d4a74c4d740e57a1f6d520aa.tar.xz
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set the close-on-exec flag on all file descriptors
Added the "fd_util" library, which attempts to use the new thread-safe Linux system calls pipe2(), accept4() and the options O_CLOEXEC, SOCK_CLOEXEC. Without these, it falls back to FD_CLOEXEC, which is not thread safe. This is particularly important for the "pipe" output plugin (and others, such as JACK/PulseAudio), because we were heavily leaking file descriptors to child processes.
Diffstat (limited to 'src/output')
-rw-r--r--src/output/fifo_output_plugin.c5
-rw-r--r--src/output/httpd_output_plugin.c5
-rw-r--r--src/output/mvp_plugin.c8
-rw-r--r--src/output/oss_plugin.c10
-rw-r--r--src/output/recorder_output_plugin.c3
-rw-r--r--src/output/solaris_output_plugin.c3
6 files changed, 22 insertions, 12 deletions
diff --git a/src/output/fifo_output_plugin.c b/src/output/fifo_output_plugin.c
index d3145748f..0217c2675 100644
--- a/src/output/fifo_output_plugin.c
+++ b/src/output/fifo_output_plugin.c
@@ -20,6 +20,7 @@
#include "output_api.h"
#include "utils.h"
#include "timer.h"
+#include "fd_util.h"
#include <glib.h>
@@ -152,7 +153,7 @@ fifo_open(struct fifo_data *fd, GError **error)
if (!fifo_check(fd, error))
return false;
- fd->input = open(fd->path, O_RDONLY|O_NONBLOCK);
+ fd->input = open_cloexec(fd->path, O_RDONLY|O_NONBLOCK);
if (fd->input < 0) {
g_set_error(error, fifo_output_quark(), errno,
"Could not open FIFO \"%s\" for reading: %s",
@@ -161,7 +162,7 @@ fifo_open(struct fifo_data *fd, GError **error)
return false;
}
- fd->output = open(fd->path, O_WRONLY|O_NONBLOCK);
+ fd->output = open_cloexec(fd->path, O_WRONLY|O_NONBLOCK);
if (fd->output < 0) {
g_set_error(error, fifo_output_quark(), errno,
"Could not open FIFO \"%s\" for writing: %s",
diff --git a/src/output/httpd_output_plugin.c b/src/output/httpd_output_plugin.c
index 5b0331257..6d5e99c57 100644
--- a/src/output/httpd_output_plugin.c
+++ b/src/output/httpd_output_plugin.c
@@ -25,6 +25,7 @@
#include "socket_util.h"
#include "page.h"
#include "icy_server.h"
+#include "fd_util.h"
#include <assert.h>
@@ -187,14 +188,14 @@ httpd_listen_in_event(G_GNUC_UNUSED GIOChannel *source,
struct httpd_output *httpd = data;
int fd;
struct sockaddr_storage sa;
- socklen_t sa_length = sizeof(sa);
+ size_t sa_length = sizeof(sa);
g_mutex_lock(httpd->mutex);
/* the listener socket has become readable - a client has
connected */
- fd = accept(httpd->fd, (struct sockaddr*)&sa, &sa_length);
+ fd = accept_cloexec(httpd->fd, (struct sockaddr*)&sa, &sa_length);
if (fd >= 0) {
/* can we allow additional client */
if (httpd->open &&
diff --git a/src/output/mvp_plugin.c b/src/output/mvp_plugin.c
index 96f9435a8..f5fbadbee 100644
--- a/src/output/mvp_plugin.c
+++ b/src/output/mvp_plugin.c
@@ -22,7 +22,8 @@
* http://mvpmc.sourceforge.net/
*/
-#include "../output_api.h"
+#include "output_api.h"
+#include "fd_util.h"
#include <glib.h>
@@ -115,7 +116,7 @@ mvp_output_test_default_device(void)
{
int fd;
- fd = open("/dev/adec_pcm", O_WRONLY);
+ fd = open_cloexec("/dev/adec_pcm", O_WRONLY);
if (fd >= 0) {
close(fd);
@@ -230,7 +231,8 @@ mvp_output_open(void *data, struct audio_format *audio_format, GError **error)
int mix[5] = { 0, 2, 7, 1, 0 };
bool success;
- if ((md->fd = open("/dev/adec_pcm", O_RDWR | O_NONBLOCK)) < 0) {
+ md->fd = open_cloexec("/dev/adec_pcm", O_RDWR | O_NONBLOCK);
+ if (md->fd < 0) {
g_set_error(error, mvp_output_quark(), errno,
"Error opening /dev/adec_pcm: %s",
strerror(errno));
diff --git a/src/output/oss_plugin.c b/src/output/oss_plugin.c
index 258fbfa9d..f308c293e 100644
--- a/src/output/oss_plugin.c
+++ b/src/output/oss_plugin.c
@@ -17,8 +17,9 @@
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
-#include "../output_api.h"
+#include "output_api.h"
#include "mixer_list.h"
+#include "fd_util.h"
#include <glib.h>
@@ -343,7 +344,9 @@ oss_output_test_default_device(void)
int fd, i;
for (i = G_N_ELEMENTS(default_devices); --i >= 0; ) {
- if ((fd = open(default_devices[i], O_WRONLY)) >= 0) {
+ fd = open_cloexec(default_devices[i], O_WRONLY);
+
+ if (fd >= 0) {
close(fd);
return true;
}
@@ -516,7 +519,8 @@ oss_open(struct oss_data *od, GError **error)
{
bool success;
- if ((od->fd = open(od->device, O_WRONLY)) < 0) {
+ od->fd = open_cloexec(od->device, O_WRONLY);
+ if (od->fd < 0) {
g_set_error(error, oss_output_quark(), errno,
"Error opening OSS device \"%s\": %s",
od->device, strerror(errno));
diff --git a/src/output/recorder_output_plugin.c b/src/output/recorder_output_plugin.c
index 413e5d0d1..202b56073 100644
--- a/src/output/recorder_output_plugin.c
+++ b/src/output/recorder_output_plugin.c
@@ -20,6 +20,7 @@
#include "output_api.h"
#include "encoder_plugin.h"
#include "encoder_list.h"
+#include "fd_util.h"
#include <assert.h>
#include <sys/types.h>
@@ -156,7 +157,7 @@ recorder_output_open(void *data, struct audio_format *audio_format,
/* create the output file */
- recorder->fd = creat(recorder->path, 0666);
+ recorder->fd = creat_cloexec(recorder->path, 0666);
if (recorder->fd < 0) {
g_set_error(error_r, recorder_output_quark(), 0,
"Failed to create '%s': %s",
diff --git a/src/output/solaris_output_plugin.c b/src/output/solaris_output_plugin.c
index 5febf0afc..4f3d86835 100644
--- a/src/output/solaris_output_plugin.c
+++ b/src/output/solaris_output_plugin.c
@@ -18,6 +18,7 @@
*/
#include "output_api.h"
+#include "fd_util.h"
#include <glib.h>
@@ -91,7 +92,7 @@ solaris_output_open(void *data, struct audio_format *audio_format,
/* open the device in non-blocking mode */
- so->fd = open(so->device, O_WRONLY|O_NONBLOCK);
+ so->fd = open_cloexec(so->device, O_WRONLY|O_NONBLOCK);
if (so->fd < 0) {
g_set_error(error, solaris_output_quark(), errno,
"Failed to open %s: %s",