bsd/kern/sysv_sem.c

686 	struct semid_kernel *semakptr;
708 	semakptr = &sema[semid];
709 	if ((semakptr->u.sem_perm.mode & SEM_ALLOC) == 0 ||
710 	    semakptr->u.sem_perm._seq != IPCID_TO_SEQ(uap->semid)) {
715 	eval = mac_sysvsem_check_semctl(cred, semakptr, cmd);
725 		if ((eval = ipcperm(cred, &semakptr->u.sem_perm, IPC_M)))
728 		semakptr->u.sem_perm.cuid = kauth_cred_getuid(cred);
729 		semakptr->u.sem_perm.uid = kauth_cred_getuid(cred);
730 		semtot -= semakptr->u.sem_nsems;
731 		for (i = semakptr->u.sem_base - sem_pool; i < semtot; i++)
732 			sem_pool[i] = sem_pool[i + semakptr->u.sem_nsems];
735 			    sema[i].u.sem_base > semakptr->u.sem_base)
736 				sema[i].u.sem_base -= semakptr->u.sem_nsems;
738 		semakptr->u.sem_perm.mode = 0;
740 		mac_sysvsem_label_recycle(semakptr);
743 		wakeup((caddr_t)semakptr);
747 		if ((eval = ipcperm(cred, &semakptr->u.sem_perm, IPC_M)))
764 		semakptr->u.sem_perm.uid = sbuf.sem_perm.uid;
765 		semakptr->u.sem_perm.gid = sbuf.sem_perm.gid;
766 		semakptr->u.sem_perm.mode = (semakptr->u.sem_perm.mode &
768 		semakptr->u.sem_ctime = sysv_semtime();
772 		if ((eval = ipcperm(cred, &semakptr->u.sem_perm, IPC_R)))
777 			semid_ds_kernelto64(&semakptr->u, &semid_ds64);
781 			semid_ds_kernelto32(&semakptr->u, &semid_ds32);
787 		if ((eval = ipcperm(cred, &semakptr->u.sem_perm, IPC_R)))
789 		if (semnum < 0 || semnum >= semakptr->u.sem_nsems) {
793 		rval = semakptr->u.sem_base[semnum].semncnt;
797 		if ((eval = ipcperm(cred, &semakptr->u.sem_perm, IPC_R)))
799 		if (semnum < 0 || semnum >= semakptr->u.sem_nsems) {
803 		rval = semakptr->u.sem_base[semnum].sempid;
807 		if ((eval = ipcperm(cred, &semakptr->u.sem_perm, IPC_R)))
809 		if (semnum < 0 || semnum >= semakptr->u.sem_nsems) {
813 		rval = semakptr->u.sem_base[semnum].semval;
817 		if ((eval = ipcperm(cred, &semakptr->u.sem_perm, IPC_R)))
820 		for (i = 0; i < semakptr->u.sem_nsems; i++) {
822 			eval = copyout((caddr_t)&semakptr->u.sem_base[i].semval,
831 		if ((eval = ipcperm(cred, &semakptr->u.sem_perm, IPC_R)))
833 		if (semnum < 0 || semnum >= semakptr->u.sem_nsems) {
837 		rval = semakptr->u.sem_base[semnum].semzcnt;
841 		if ((eval = ipcperm(cred, &semakptr->u.sem_perm, IPC_W)))
848 		if (semnum < 0 || semnum >= semakptr->u.sem_nsems)
861 		semakptr->u.sem_base[semnum].semval = CAST_DOWN_EXPLICIT(int,user_arg.buf);
862 		semakptr->u.sem_base[semnum].sempid = p->p_pid;
865 		wakeup((caddr_t)semakptr);
869 		if ((eval = ipcperm(cred, &semakptr->u.sem_perm, IPC_W)))
872 		for (i = 0; i < semakptr->u.sem_nsems; i++) {
875 			    (caddr_t)&semakptr->u.sem_base[i].semval,
879 			semakptr->u.sem_base[i].sempid = p->p_pid;
883 		wakeup((caddr_t)semakptr);
1048 	register struct semid_kernel *semakptr;
1070 	semakptr = &sema[semid];
1071 	if ((semakptr->u.sem_perm.mode & SEM_ALLOC) == 0) {
1075 	if (semakptr->u.sem_perm._seq != IPCID_TO_SEQ(uap->semid)) {
1080 	if ((eval = ipcperm(kauth_cred_get(), &semakptr->u.sem_perm, IPC_W))) {
1118 	eval = mac_sysvsem_check_semop(kauth_cred_get(), semakptr, j);
1140 			if (sopptr->sem_num >= semakptr->u.sem_nsems) {
1145 			semptr = &semakptr->u.sem_base[sopptr->sem_num];
1148 			printf("semop:  semakptr=%x, sem_base=%x, semptr=%x, sem[%d]=%d : op=%d, flag=%s\n",
1149 			    semakptr, semakptr->u.sem_base, semptr,
1197 			semakptr->u.sem_base[sops[j].sem_num].semval -=
1222 		eval = msleep((caddr_t)semakptr, &sysv_sem_subsys_mutex , (PZERO - 4) | PCATCH,
1247 	 	semakptr = &sema[semid];   /* sema may have been reallocated */
1248 		if ((semakptr->u.sem_perm.mode & SEM_ALLOC) == 0 ||
1249 		    semakptr->u.sem_perm._seq != IPCID_TO_SEQ(uap->semid) ||
1250 		    sopptr->sem_num >= semakptr->u.sem_nsems) {
1275 		semptr = &semakptr->u.sem_base[sopptr->sem_num];
1329 				semakptr->u.sem_base[sops[j].sem_num].semval -=
1342 		semptr = &semakptr->u.sem_base[sopptr->sem_num];
1345 	semakptr->u.sem_otime = sysv_semtime();
1351 		sem_wakeup((caddr_t)semakptr);
1353 		wakeup((caddr_t)semakptr);
1357 		wakeup((caddr_t)semakptr);
1424 			struct semid_kernel *semakptr;
1431 			semakptr = &sema[semid];
1432 			if ((semakptr->u.sem_perm.mode & SEM_ALLOC) == 0)
1434 			if (semnum >= semakptr->u.sem_nsems)
1443 			       semakptr->u.sem_base[semnum].semval);
1447 				if (semakptr->u.sem_base[semnum].semval < -adjval)
1448 					semakptr->u.sem_base[semnum].semval = 0;
1450 					semakptr->u.sem_base[semnum].semval +=
1453 				semakptr->u.sem_base[semnum].semval += adjval;
1455 		/* Maybe we should build a list of semakptr's to wake
1464 			sem_wakeup((caddr_t)semakptr);
1466 			wakeup((caddr_t)semakptr);