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3f58cad638
parameter is optional except where:
cmd == {IPC_SET || IPC_STAT || GETALL || SETVAL || SETALL}
PR: 2448
Reviewed by: bde
Submitted by: Tim Singletary <tsingle@sunland.gsfc.nasa.gov>
Minor tweaks by: steve
38 lines
728 B
C
38 lines
728 B
C
#include <sys/types.h>
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#include <sys/ipc.h>
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#include <sys/sem.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#if __STDC__
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int semctl(int semid, int semnum, int cmd, ...)
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#else
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int semctl(semid, semnum, cmd, va_alist)
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int semid, semnum;
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int cmd;
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va_dcl
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#endif
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{
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va_list ap;
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union semun semun;
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union semun *semun_ptr;
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#ifdef __STDC__
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va_start(ap, cmd);
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#else
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va_start(ap);
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#endif
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if (cmd == IPC_SET || cmd == IPC_STAT || cmd == GETALL
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|| cmd == SETVAL || cmd == SETALL) {
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semun = va_arg(ap, union semun);
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semun_ptr = &semun;
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} else {
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semun_ptr = NULL;
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}
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va_end(ap);
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#ifdef __NETBSD_SYSCALLS
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return (__semctl(semid, semnum, cmd, semun_ptr));
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#else
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return (semsys(0, semid, semnum, cmd, semun_ptr));
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#endif
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}
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