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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 /sysdeps/mach/hurd/getegid.c | |
| parent | a4ea18ec6cc3f1370efab09bc18c1badbf74aa13 (diff) | |
| download | glibc-c3b287be74e12bdb15ed36e98d24fd42f8ee9122.tar glibc-c3b287be74e12bdb15ed36e98d24fd42f8ee9122.tar.gz glibc-c3b287be74e12bdb15ed36e98d24fd42f8ee9122.tar.bz2 glibc-c3b287be74e12bdb15ed36e98d24fd42f8ee9122.zip | |
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 'sysdeps/mach/hurd/getegid.c')
| -rw-r--r-- | sysdeps/mach/hurd/getegid.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sysdeps/mach/hurd/getegid.c b/sysdeps/mach/hurd/getegid.c index 5a3db22746..1929d749a7 100644 --- a/sysdeps/mach/hurd/getegid.c +++ b/sysdeps/mach/hurd/getegid.c @@ -27,6 +27,7 @@ __getegid (void) error_t err; gid_t egid; +retry: HURD_CRITICAL_BEGIN; __mutex_lock (&_hurd_id.lock); @@ -49,6 +50,9 @@ __getegid (void) __mutex_unlock (&_hurd_id.lock); HURD_CRITICAL_END; + if (egid == -1 && errno == EINTR) + /* Got a signal while inside an RPC of the critical section, retry again */ + goto retry; return egid; } |