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padsp: wrap __open_2 and __open64_2

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These functions are used in OSS programs where the "flags" parameter for
open() is not a build-time constant and the build has _FORTIFY_SOURCE
enabled.
This commit is contained in:
Michal Schmidt 2011-01-08 16:25:15 +01:00 • committed by Colin Guthrie
parent 6f870f501d
commit 7cb1401eae
1 changed files with 52 additions and 9 deletions
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61
src/utils/padsp.c
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@ -118,6 +118,7 @@ static PA_LLIST_HEAD(fd_info, fd_infos) = NULL;
static int (*_ioctl)(int, int, void*) = NULL;
static int (*_close)(int) = NULL;
static int (*_open)(const char *, int, mode_t) = NULL;
static int (*___open_2)(const char *, int) = NULL;
static FILE* (*_fopen)(const char *path, const char *mode) = NULL;
static int (*_stat)(const char *, struct stat *) = NULL;
#ifdef _STAT_VER
@ -125,6 +126,7 @@ static int (*___xstat)(int, const char *, struct stat *) = NULL;
#endif
#ifdef HAVE_OPEN64
static int (*_open64)(const char *, int, mode_t) = NULL;
static int (*___open64_2)(const char *, int) = NULL;
static FILE* (*_fopen64)(const char *path, const char *mode) = NULL;
static int (*_stat64)(const char *, struct stat64 *) = NULL;
#ifdef _STAT_VER
@ -157,6 +159,14 @@ do { \
pthread_mutex_unlock(&func_mutex); \
} while(0)
#define LOAD___OPEN_2_FUNC() \
do { \
pthread_mutex_lock(&func_mutex); \
if (!___open_2) \
___open_2 = (int (*)(const char *, int)) dlsym_fn(RTLD_NEXT, "__open_2"); \
pthread_mutex_unlock(&func_mutex); \
} while(0)
#define LOAD_OPEN64_FUNC() \
do { \
pthread_mutex_lock(&func_mutex); \
@ -165,6 +175,14 @@ do { \
pthread_mutex_unlock(&func_mutex); \
} while(0)
#define LOAD___OPEN64_2_FUNC() \
do { \
pthread_mutex_lock(&func_mutex); \
if (!___open64_2) \
___open64_2 = (int (*)(const char *, int)) dlsym_fn(RTLD_NEXT, "__open64_2"); \
pthread_mutex_unlock(&func_mutex); \
} while(0)
#define LOAD_CLOSE_FUNC() \
do { \
pthread_mutex_lock(&func_mutex); \
@ -1494,6 +1512,27 @@ int open(const char *filename, int flags, ...) {
return real_open(filename, flags, mode);
}
static pa_bool_t is_audio_device_node(const char *path) {
return
pa_streq(path, "/dev/dsp") ||
pa_streq(path, "/dev/adsp") ||
pa_streq(path, "/dev/audio") ||
pa_streq(path, "/dev/sndstat") ||
pa_streq(path, "/dev/mixer");
}
int __open_2(const char *filename, int flags) {
debug(DEBUG_LEVEL_VERBOSE, __FILE__": __open_2(%s)\n", filename?filename:"NULL");
if ((flags & O_CREAT) ||
!filename ||
!is_audio_device_node(filename)) {
LOAD___OPEN_2_FUNC();
return ___open_2(filename, flags);
}
return real_open(filename, flags, 0);
}
static int mixer_ioctl(fd_info *i, unsigned long request, void*argp, int *_errno) {
int ret = -1;
@ -2383,15 +2422,6 @@ int close(int fd) {
return 0;
}
static pa_bool_t is_audio_device_node(const char *path) {
return
pa_streq(path, "/dev/dsp") ||
pa_streq(path, "/dev/adsp") ||
pa_streq(path, "/dev/audio") ||
pa_streq(path, "/dev/sndstat") ||
pa_streq(path, "/dev/mixer");
}
int access(const char *pathname, int mode) {
debug(DEBUG_LEVEL_VERBOSE, __FILE__": access(%s)\n", pathname?pathname:"NULL");
@ -2527,6 +2557,19 @@ int open64(const char *filename, int flags, ...) {
return real_open(filename, flags, mode);
}
int __open64_2(const char *filename, int flags) {
debug(DEBUG_LEVEL_VERBOSE, __FILE__": __open64_2(%s)\n", filename?filename:"NULL");
if ((flags & O_CREAT) ||
!filename ||
!is_audio_device_node(filename)) {
LOAD___OPEN64_2_FUNC();
return ___open64_2(filename, flags);
}
return real_open(filename, flags, 0);
}
#endif
#ifdef _STAT_VER