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-rw-r--r--sys/kern/sysv_sem.c19
-rw-r--r--sys/sys/sem.h2
2 files changed, 21 insertions, 0 deletions
diff --git a/sys/kern/sysv_sem.c b/sys/kern/sysv_sem.c
index a1deec7..81e00b8 100644
--- a/sys/kern/sysv_sem.c
+++ b/sys/kern/sysv_sem.c
@@ -499,6 +499,25 @@ __semctl(td, uap)
goto done2;
}
+ switch(cmd) {
+ case SEM_STAT:
+ if (semid < 0 || semid >= seminfo.semmsl)
+ return(EINVAL);
+ semaptr = &sema[semid];
+ if ((semaptr->sem_perm.mode & SEM_ALLOC) == 0 )
+ return(EINVAL);
+ if ((error = ipcperm(td, &semaptr->sem_perm, IPC_R)))
+ return(error);
+ if ((error = copyin(arg, &real_arg, sizeof(real_arg))) != 0)
+ return(error);
+ error = copyout((caddr_t)semaptr, real_arg.buf,
+ sizeof(struct semid_ds));
+ rval = IXSEQ_TO_IPCID(semid,semaptr->sem_perm);
+ if (error == 0)
+ td->td_retval[0] = rval;
+ goto done2;
+ }
+
semid = IPCID_TO_IX(semid);
if (semid < 0 || semid >= seminfo.semmsl) {
error = EINVAL;
diff --git a/sys/sys/sem.h b/sys/sys/sem.h
index 736a805e4..1bed0c3 100644
--- a/sys/sys/sem.h
+++ b/sys/sys/sem.h
@@ -58,6 +58,8 @@ union semun {
#define GETZCNT 7 /* Return the value of semzcnt {READ} */
#define SETVAL 8 /* Set the value of semval to arg.val {ALTER} */
#define SETALL 9 /* Set semvals from arg.array {ALTER} */
+#define SEM_STAT 10 /* Like IPC_STAT but treats semid as sema-index */
+#define SEM_INFO 11 /* Like IPC_INFO but treats semid as sema-index */
/*
* Permissions
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