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authorkay.sievers@vrfy.org <kay.sievers@vrfy.org>2003-11-18 00:59:27 -0800
committerGreg KH <gregkh@suse.de>2005-04-26 21:06:24 -0700
commit98b88dbf704a1376ee4c79051086089adde5d626 (patch)
tree7ff012ae5707e101b7f640fdaca850636fe30a21 /namedev.c
parent30defadd3fbef99628a16dcd7c4a2964982deac2 (diff)
[PATCH] implement printf-like placeholder support for NAME
> Problem is, if you use the LABEL rule to match a device, like a SCSI > vendor, then all of the partitions, as well as the main block device, > will end up with the same name. That's why I added the "add the number" > hack to the LABEL rule. > > So yes, your patch is correct in that we shouldn't always be adding the > number to any match for LABEL (like for char devices), but if we do > that, then we break partitions. Your '%' patch fixes this, but I'd just > like to extend it a bit. Let me see what I can come up with... Oh, I see. Do you mean something like this: LABEL, BUS="usb", model="Creative Labs WebCam 3", NAME="webcam%n-%M:%m-test" results in: "webcam0-81:0-test" Nov 15 16:51:53 pim udev[16193]: get_class_dev: looking at /sys/class/video4linux/video0 Nov 15 16:51:53 pim udev[16193]: get_class_dev: class_dev->name = video0 Nov 15 16:51:53 pim udev[16193]: get_major_minor: dev = 81:0 Nov 15 16:51:53 pim udev[16193]: get_major_minor: found major = 81, minor = 0 Nov 15 16:51:53 pim udev[16193]: udev_add_device: name = webcam0-81:0-test Nov 15 16:51:53 pim udev[16193]: create_node: mknod(/udev/webcam0-81:0-test, 020666, 81, 0) implement printf-like placeholder support for NAME %n-kernel number, %M-major number, %m-minor number
Diffstat (limited to 'namedev.c')
-rw-r--r--namedev.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/namedev.c b/namedev.c
index d76d03b490..f6be43ef51 100644
--- a/namedev.c
+++ b/namedev.c
@@ -817,6 +817,37 @@ static int get_attr(struct sysfs_class_device *class_dev, struct udevice *udev)
strcpy(udev->name, class_dev->name);
done:
+ /* substitute placeholder in NAME */
+ while (1) {
+ pos = strchr(udev->name, '%');
+ if (pos) {
+ strcpy(name, pos+2);
+ *pos = 0x00;
+ switch (pos[1]) {
+ case 'n':
+ dig = class_dev->name + strlen(class_dev->name);
+ while (isdigit(*(dig-1)))
+ dig--;
+ strcat(udev->name, dig);
+ dbg_parse("kernel number appended: %s", dig);
+ break;
+ case 'm':
+ sprintf(pos, "%u", udev->minor);
+ dbg_parse("minor number appended: %u", udev->minor);
+ break;
+ case 'M':
+ sprintf(pos, "%u", udev->major);
+ dbg_parse("major number appended: %u", udev->major);
+ break;
+ default:
+ dbg_parse("unknown substitution type: %%%c", pos[1]);
+ break;
+ }
+ strcat(udev->name, name);
+ } else
+ break;
+ }
+
/* mode was never set above */
if (!udev->mode) {
udev->mode = get_default_mode(class_dev);