summaryrefslogtreecommitdiff
path: root/sys/src/ape/lib/ap/plan9/getppid.c
blob: ad38e2c7bf4cc5d7e285a01464ea259de5a7eb97 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include "sys9.h"

pid_t
getppid(void)
{
	char b[20];
	int f;

	memset(b, 0, sizeof(b));
	f = _OPEN("/dev/ppid", OREAD);
	if(f >= 0) {
		_PREAD(f, b, sizeof(b), 0);
		_CLOSE(f);
	}
	return atol(b);
}