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udev: warn when name_to_handle_at is not implemented

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We have a bunch of reports from people who have a custom kernel and
are confused why udev is not running. Issue a warning on
error. Barring an error in the code, the only error that is possible
is ENOSYS.

https://bugzilla.redhat.com/show_bug.cgi?id=1072966
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2014-04-20 13:57:26 -04:00
parent bf50056632
commit e6c474723d
1 changed files with 4 additions and 1 deletions
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5
src/libudev/libudev-monitor.c
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@ -119,8 +119,11 @@ static bool udev_has_devtmpfs(struct udev *udev) {
int r;
r = name_to_handle_at(AT_FDCWD, "/dev", &h.handle, &mount_id, 0);
if (r < 0)
if (r < 0) {
if (errno != EOPNOTSUPP)
udev_err(udev, "name_to_handle_at on /dev: %m\n");
return false;
}
f = fopen("/proc/self/mountinfo", "re");
if (!f)