diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/semctl.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/semctl.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/semctl.c b/sysdeps/unix/sysv/linux/semctl.c index 77a8130c18..3458b018bc 100644 --- a/sysdeps/unix/sysv/linux/semctl.c +++ b/sysdeps/unix/sysv/linux/semctl.c @@ -140,6 +140,13 @@ __semctl64 (int semid, int semnum, int cmd, ...) union semun64 arg64 = { 0 }; va_list ap; + /* Some applications pass the __IPC_64 flag in cmd, to invoke + previously unsupported commands back when there was no EINVAL + error checking in glibc. Mask the flag for the switch statements + below. semctl_syscall adds back the __IPC_64 flag for the actual + system call. */ + cmd &= ~__IPC_64; + /* Get the argument only if required. */ switch (cmd) { |