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Catch the access() system call as some applications do this to test if they

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can open /dev/dsp.


git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@1016 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Pierre Ossman 2006-06-13 13:21:14 +00:00
parent b5a8815ec9
commit 0f13c43797
1 changed files with 28 additions and 0 deletions
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28
src/utils/padsp.c
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@ -101,6 +101,7 @@ static FILE* (*_fopen)(const char *path, const char *mode) = NULL;
static int (*_open64)(const char *, int, mode_t) = NULL;
static FILE* (*_fopen64)(const char *path, const char *mode) = NULL;
static int (*_fclose)(FILE *f) = NULL;
static int (*_access)(const char *, int) = NULL;
/* dlsym() violates ISO C, so confide the breakage into this function to
* avoid warnings. */
@ -141,6 +142,14 @@ do { \
pthread_mutex_unlock(&func_mutex); \
} while(0)
#define LOAD_ACCESS_FUNC() \
do { \
pthread_mutex_lock(&func_mutex); \
if (!_access) \
_access = (int (*)(const char*, int)) dlsym_fn(RTLD_NEXT, "access"); \
pthread_mutex_unlock(&func_mutex); \
} while(0)
#define LOAD_FOPEN_FUNC() \
do { \
pthread_mutex_lock(&func_mutex); \
@ -1725,6 +1734,25 @@ int close(int fd) {
return 0;
}
int access(const char *pathname, int mode) {
debug(__FILE__": access()\n");
if (strcmp(pathname, "/dev/dsp") != 0 &&
strcmp(pathname, "/dev/adsp") != 0 &&
strcmp(pathname, "/dev/sndstat") != 0 &&
strcmp(pathname, "/dev/mixer") != 0) {
LOAD_ACCESS_FUNC();
return _access(pathname, mode);
}
if (mode & (W_OK | X_OK)) {
errno = EACCES;
return -1;
}
return 0;
}
int open64(const char *filename, int flags, ...) {
va_list args;
mode_t mode = 0;