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062f40ef3e
rejecting invalid values for n is fine even in the case where a new sem will not be created, since the kernel does its range checks on n even in this case as well. by default, the kernel will bound the limit well below USHRT_MAX anyway, but it's presumably possible that an administrator could override this limit and break things.
83 lines
1.4 KiB
C
83 lines
1.4 KiB
C
#ifndef _SYS_SEM_H
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#define _SYS_SEM_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <features.h>
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#define __NEED_size_t
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#define __NEED_pid_t
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#define __NEED_time_t
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#ifdef _GNU_SOURCE
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#define __NEED_struct_timespec
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#endif
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#include <bits/alltypes.h>
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#include <sys/ipc.h>
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#define SEM_UNDO 0x1000
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#define GETPID 11
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#define GETVAL 12
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#define GETALL 13
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#define GETNCNT 14
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#define GETZCNT 15
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#define SETVAL 16
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#define SETALL 17
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#include <endian.h>
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struct semid_ds {
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struct ipc_perm sem_perm;
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long sem_otime;
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unsigned long __unused1;
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long sem_ctime;
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unsigned long __unused2;
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#if __BYTE_ORDER == __LITTLE_ENDIAN
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unsigned short sem_nsems;
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char __sem_nsems_pad[sizeof(long)-sizeof(short)];
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#else
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char __sem_nsems_pad[sizeof(long)-sizeof(short)];
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unsigned short sem_nsems;
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#endif
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unsigned long __unused3;
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unsigned long __unused4;
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};
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#define _SEM_SEMUN_UNDEFINED 1
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#define SEM_STAT 18
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#define SEM_INFO 19
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struct seminfo {
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int semmap;
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int semmni;
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int semmns;
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int semmnu;
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int semmsl;
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int semopm;
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int semume;
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int semusz;
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int semvmx;
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int semaem;
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};
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struct sembuf {
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unsigned short sem_num;
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short sem_op;
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short sem_flg;
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};
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int semctl(int, int, int, ...);
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int semget(key_t, int, int);
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int semop(int, struct sembuf *, size_t);
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#ifdef _GNU_SOURCE
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int semtimedop(int, struct sembuf *, size_t, const struct timespec *);
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif
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