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* sysv_shm.cc (shmget): Allow to retrieve shared memory segments

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by shmid when IPC_KEY_IS_SHMID is set.
This commit is contained in:
Corinna Vinschen 2004-03-30 15:21:18 +00:00
parent 5c7b73ed97
commit d2714c5eda
2 changed files with 11 additions and 0 deletions
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5
winsup/cygserver/ChangeLog
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@ -1,3 +1,8 @@
2004-03-30 Corinna Vinschen <corinna@vinschen.de>
* sysv_shm.cc (shmget): Allow to retrieve shared memory segments
by shmid when IPC_KEY_IS_SHMID is set.
2004-03-02 Corinna Vinschen <corinna@vinschen.de>
* sysv_sem.cc (semundo_adjust): Check for process id instead of

6
winsup/cygserver/sysv_shm.cc
View File

@ -808,6 +808,12 @@ shmget(struct thread *td, struct shmget_args *uap)
mode = uap->shmflg & ACCESSPERMS;
if (uap->key != IPC_PRIVATE) {
again:
#ifdef __CYGWIN__
if (uap->shmflg & IPC_KEY_IS_SHMID)
segnum = shm_find_segment_by_shmid ((int) uap->key) ?
IPCID_TO_IX((int) uap->key) : -1;
else
#endif
segnum = shm_find_segment_by_key(uap->key);
if (segnum >= 0) {
error = shmget_existing(td, uap, mode, segnum);