minix/lib/libc/sys-minix/setitimer.c
David van Moolenbroek 24ec0d73b5 Clean up interface to PM and VFS
- introduce new call numbers, names, and field aliases;
- initialize request messages to zero for all ABI calls;
- format callnr.h in the same way as com.h;
- redo call tables in both servers;
- remove param.h namespace pollution in the servers;
- make brk(2) go to VM directly, rather than through PM;
- remove obsolete BRK, UTIME, and WAIT calls;
- clean up path copying routine in VFS;
- move remaining system calls from libminlib to libc;
- correct some errno-related mistakes in libc routines.

Change-Id: I2d8ec5d061cd7e0b30c51ffd77aa72ebf84e2565
2014-03-01 09:05:01 +01:00

35 lines
839 B
C

#include <sys/cdefs.h>
#include "namespace.h"
#include <lib.h>
#include <string.h>
#include <sys/time.h>
/*
* This is the implementation of the function to
* invoke the interval timer setting system call.
*/
int setitimer(int which, const struct itimerval *__restrict value,
struct itimerval *__restrict ovalue)
{
message m;
/* A null pointer for 'value' would make setitimer behave like getitimer,
* which is not according to the specification, so disallow null pointers.
*/
if (value == NULL) {
errno = EINVAL;
return -1;
}
memset(&m, 0, sizeof(m));
m.PM_ITIMER_WHICH = which;
m.PM_ITIMER_VALUE = (char *) __UNCONST(value);
m.PM_ITIMER_OVALUE = (char *) ovalue;
return _syscall(PM_PROC_NR, PM_ITIMER, &m);
}
#if defined(__minix) && defined(__weak_alias)
__weak_alias(setitimer, __setitimer50)
#endif