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v4l2: follow symlinks

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Dmitry Sharshakov 2023-01-03 09:32:38 +03:00 • committed by Wim Taymans
parent f62c40c205
commit 5c96928d12
1 changed files with 13 additions and 1 deletions
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14
pipewire-v4l2/src/pipewire-v4l2.c
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@ -28,6 +28,7 @@
#include <fcntl.h> #include <fcntl.h>
#include <dlfcn.h> #include <dlfcn.h>
#include <stdarg.h> #include <stdarg.h>
#include <stdlib.h>
#include <sys/mman.h> #include <sys/mman.h>
#include <sys/stat.h> #include <sys/stat.h>
#include <sys/types.h> #include <sys/types.h>
@ -786,13 +787,17 @@ static int v4l2_dup(int oldfd)
return do_dup(oldfd, FD_MAP_DUP); return do_dup(oldfd, FD_MAP_DUP);
} }
static int v4l2_openat(int dirfd, const char *path, int oflag, mode_t mode) static int v4l2_openat(int dirfd, const char *requested_path, int oflag, mode_t mode)
{ {
int res, flags; int res, flags;
struct file *file; struct file *file;
bool passthrough = true; bool passthrough = true;
uint32_t dev_id = SPA_ID_INVALID; uint32_t dev_id = SPA_ID_INVALID;
char *path = realpath(requested_path, NULL);
if (path <= 0)
path = (char *)requested_path;
if (spa_strstartswith(path, "/dev/video")) { if (spa_strstartswith(path, "/dev/video")) {
if (spa_atou32(path+10, &dev_id, 10) && dev_id < MAX_DEV) if (spa_atou32(path+10, &dev_id, 10) && dev_id < MAX_DEV)
passthrough = false; passthrough = false;
@ -876,6 +881,9 @@ static int v4l2_openat(int dirfd, const char *path, int oflag, mode_t mode)
add_dev_for_serial(file->dev_id, file->serial); add_dev_for_serial(file->dev_id, file->serial);
unref_file(file); unref_file(file);
if (path > 0 && path != requested_path)
free(path);
return res; return res;
error_unlock: error_unlock:
@ -888,6 +896,10 @@ error:
pw_log_info("path:%s oflag:%d mode:%d -> %d (%s)", path, oflag, mode, pw_log_info("path:%s oflag:%d mode:%d -> %d (%s)", path, oflag, mode,
-1, spa_strerror(res)); -1, spa_strerror(res));
errno = -res; errno = -res;
if (path > 0 && path != requested_path)
free(path);
return -1; return -1;
} }