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| author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2021-03-23 22:38:54 +0000 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2021-03-23 22:40:10 +0000 |
| commit | c3b287be74e12bdb15ed36e98d24fd42f8ee9122 (patch) | |
| tree | 82a9f85685a35bf5b12e480ee6ed1abc24103dc8 /hurd/seteuids.c | |
| parent | a4ea18ec6cc3f1370efab09bc18c1badbf74aa13 (diff) | |
| download | glibc-c3b287be74e12bdb15ed36e98d24fd42f8ee9122.zip glibc-c3b287be74e12bdb15ed36e98d24fd42f8ee9122.tar.gz glibc-c3b287be74e12bdb15ed36e98d24fd42f8ee9122.tar.bz2 | |
hurd: handle EINTR during critical sections
During critical sections, signal handling is deferred and thus RPCs return
EINTR, even if SA_RESTART is set. We thus have to restart the whole critical
section in that case.
This also adds HURD_CRITICAL_UNLOCK in the cases where one wants to
break the section in the middle.
Diffstat (limited to 'hurd/seteuids.c')
| -rw-r--r-- | hurd/seteuids.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/hurd/seteuids.c b/hurd/seteuids.c index 19db47f..df0922f 100644 --- a/hurd/seteuids.c +++ b/hurd/seteuids.c @@ -31,6 +31,7 @@ seteuids (int n, const uid_t *uids) for (i = 0; i < n; ++i) new[i] = uids[i]; +retry: HURD_CRITICAL_BEGIN; __mutex_lock (&_hurd_id.lock); err = _hurd_check_ids (); @@ -47,6 +48,9 @@ seteuids (int n, const uid_t *uids) } __mutex_unlock (&_hurd_id.lock); HURD_CRITICAL_END; + if (err == EINTR) + /* Got a signal while inside an RPC of the critical section, retry again */ + goto retry; if (err) return __hurd_fail (err); |