mlock2.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#include <syscall.h>
 3#include <errno.h>
 4#include <stdio.h>
 5#include <stdlib.h>
 6
 7static int mlock2_(void *start, size_t len, int flags)
 8{
 9	int ret = syscall(__NR_mlock2, start, len, flags);
10
11	if (ret) {
12		errno = ret;
13		return -1;
14	}
15	return 0;
16}
17
18static FILE *seek_to_smaps_entry(unsigned long addr)
19{
20	FILE *file;
21	char *line = NULL;
22	size_t size = 0;
23	unsigned long start, end;
24	char perms[5];
25	unsigned long offset;
26	char dev[32];
27	unsigned long inode;
28	char path[BUFSIZ];
29
30	file = fopen("/proc/self/smaps", "r");
31	if (!file)
32		ksft_exit_fail_msg("fopen smaps: %s\n", strerror(errno));
33
34	while (getline(&line, &size, file) > 0) {
35		if (sscanf(line, "%lx-%lx %s %lx %s %lu %s\n",
36			   &start, &end, perms, &offset, dev, &inode, path) < 6)
37			goto next;
38
39		if (start <= addr && addr < end)
40			goto out;
41
42next:
43		free(line);
44		line = NULL;
45		size = 0;
46	}
47
48	fclose(file);
49	file = NULL;
50
51out:
52	free(line);
53	return file;
54}