Retrieves info for all v4l2 devices on /dev

From: Mauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/utils/v4l2_sysfs_path.c b/utils/v4l2_sysfs_path.c
index 8763c34..2fe89b6 100644 (file)
--- a/utils/v4l2_sysfs_path.c
+++ b/utils/v4l2_sysfs_path.c
@@ -16,20 +16,19 @@
     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  */
 
-
-
 #include "../lib/v4l2_driver.h"
 #include <sysfs/libsysfs.h>
 #include <errno.h>
 #include <malloc.h>
 #include <stdio.h>
 #include <string.h>
+#include <dirent.h>
 
 #define USB_ID "usb-"
 #define PCI_ID "PCI:"
 #define PCIe_ID "PCIe:"
 
-char *obtain_bus_sysfs_path(const char *bus_info)
+char *obtain_bus_sysfs_path(char *bus_info)
 {
        struct sysfs_device *pcictl = NULL;
        struct sysfs_bus *bus = NULL;
@@ -136,24 +135,57 @@ err:
        return NULL;
 }
 
-int main(void)
+void get_sysfs(char *fname)
 {
        struct v4l2_driver drv;
        char *path;
-
-       if (v4l2_open("/dev/video0", 0, &drv) < 0) {
-               perror("open /dev/video0");
-               return -1;
+       if (v4l2_open(fname, 0, &drv) < 0) {
+               perror(fname);
+               return;
        }
 
-       printf("bus info = %s\n", drv.cap.bus_info);
+       printf("device     = %s\n", fname);
+       printf("bus info   = %s\n", drv.cap.bus_info);
        path = obtain_bus_sysfs_path((char *)drv.cap.bus_info);
        if (path) {
-               printf("sysfs path = %s\n", path);
+               printf("sysfs path = %s\n\n", path);
                free(path);
        }
 
        v4l2_close(&drv);
+}
 
+void read_dir(char *dirname)
+{
+       DIR             *dir;
+       struct dirent   *entry;
+       const char      *vid = "video";
+       const char      *rad = "radio";
+       char            *p, name[512];
+
+       dir = opendir(dirname);
+       if (!dir)
+               return;
+
+       strcpy(name, dirname);
+       strcat(name, "/");
+       p = name + strlen(name);
+
+       entry = readdir(dir);
+       while (entry) {
+               if (!strncmp(entry->d_name, vid, strlen(vid)) ||
+                   !strncmp(entry->d_name, rad, strlen(rad))) {
+                       strcpy(p, entry->d_name);
+
+                       get_sysfs(name);
+               }
+               entry = readdir(dir);
+       }
+       closedir(dir);
+}
+
+int main(void)
+{
+       read_dir("/dev");
        return 0;
 }