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rules: v4l - add by-id/ links for USB devices

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/dev/v4l
|-- by-id
|   |-- usb-046d_09a4_C4B15020-video-index0 -> ../../video0
|   `-- usb-05a9_a511-video-index0 -> ../../video1
`-- by-path
    |-- pci-0000:00:1d.0-usb-0:1:1.0-video-index0 -> ../../video1
    `-- pci-0000:00:1d.7-usb-0:2:1.0-video-index0 -> ../../video0
This commit is contained in:
Kay Sievers 2008-11-20 02:26:13 +01:00
parent 874c43e42a
commit 24239ded2d
2 changed files with 6 additions and 1 deletions
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4
extras/usb_id/usb_id.c
View file

@ -70,7 +70,9 @@ static void set_usb_iftype(char *to, int if_class_num, size_t len)
case 0x0a: /* CDC-Data */
case 0x0b: /* Chip/Smart Card */
case 0x0d: /* Content Security */
case 0x0e: /* Video */
case 0x0e:
type = "video";
break;
case 0xdc: /* Diagnostic Device */
case 0xe0: /* Wireless Controller */
case 0xf2: /* Application-specific */

3
rules/rules.d/60-persistent-v4l.rules
View file

@ -3,6 +3,9 @@
ACTION!="add|change", GOTO="persistent_v4l_end"
SUBSYSTEM!="video4linux", GOTO="persistent_v4l_end"
SUBSYSTEMS=="usb", IMPORT{program}="usb_id --export"
KERNEL=="video*", ENV{ID_SERIAL}=="?*", SYMLINK+="v4l/by-id/$env{ID_BUS}-$env{ID_SERIAL}-video-index$attr{index}"
# check for valid "index" number
TEST!="index", GOTO="persistent_v4l_end"
ATTR{index}!="?*", GOTO="persistent_v4l_end"