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exit WAIT_FOR_SYSFS if the whole device goes away

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Signed-off-by: Kay Sievers <kay.sievers@suse.de>
This commit is contained in:
Kay Sievers 2006-02-15 20:43:28 +01:00
parent 42878445d7
commit 656ba91ee1
1 changed files with 18 additions and 8 deletions
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26
udev_rules.c
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@ -342,23 +342,33 @@ out:
#define WAIT_LOOP_PER_SECOND 50
static int wait_for_sysfs(struct udevice *udev, const char *file, int timeout)
{
char filename[PATH_SIZE];
char devicepath[PATH_SIZE];
char filepath[PATH_SIZE];
struct stat stats;
int loop = timeout * WAIT_LOOP_PER_SECOND;
snprintf(filename, sizeof(filename), "%s%s/%s", sysfs_path, udev->dev->devpath, file);
filename[sizeof(filename)-1] = '\0';
dbg("will wait %i sec for '%s'", timeout, filename);
strlcpy(devicepath, sysfs_path, sizeof(devicepath));
strlcat(devicepath, udev->dev->devpath, sizeof(devicepath));
strlcpy(filepath, devicepath, sizeof(filepath));
strlcat(filepath, "/", sizeof(filepath));
strlcat(filepath, file, sizeof(filepath));
dbg("will wait %i sec for '%s'", timeout, filepath);
while (--loop) {
if (stat(filename, &stats) == 0) {
info("file '%s' appeared after %i loops", filename, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
/* lookup file */
if (stat(filepath, &stats) == 0) {
info("file '%s' appeared after %i loops", filepath, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
return 0;
}
info("wait for '%s' for %i mseconds", filename, 1000 / WAIT_LOOP_PER_SECOND);
/* make sure the device does not have disappeared in the meantime */
if (stat(devicepath, &stats) != 0) {
info("device disappeared while waiting for '%s'", filepath);
return -2;
}
info("wait for '%s' for %i mseconds", filepath, 1000 / WAIT_LOOP_PER_SECOND);
usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
}
err("waiting for '%s' failed", filename);
err("waiting for '%s' failed", filepath);
return -1;
}