1/*
2 * Copyright (c) 2014, The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *  * Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 *  * Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in
12 *    the documentation and/or other materials provided with the
13 *    distribution.
14 *  * Neither the name of Google, Inc. nor the names of its contributors
15 *    may be used to endorse or promote products derived from this
16 *    software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
21 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
22 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
24 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
25 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
26 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
28 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <stdio.h>
33#include <unistd.h>
34#include <stdlib.h>
35#include <sys/time.h>
36#include <sys/resource.h>
37
38static void
39usage(const char *s)
40{
41    fprintf(stderr, "usage: %s pid resource cur max\n", s);
42    exit(EXIT_FAILURE);
43}
44
45int prlimit_main(int argc, char *argv[])
46{
47    pid_t pid;
48    struct rlimit64 rl;
49    int resource;
50    int rc;
51
52    if (argc != 5)
53        usage(*argv);
54
55    if (sscanf(argv[1], "%d", &pid) != 1)
56        usage(*argv);
57
58    if (sscanf(argv[2], "%d", &resource) != 1)
59        usage(*argv);
60
61    if (sscanf(argv[3], "%llu", &rl.rlim_cur) != 1)
62        usage(*argv);
63
64    if (sscanf(argv[4], "%llu", &rl.rlim_max) != 1)
65        usage(*argv);
66
67    printf("setting resource %d of pid %d to [%llu,%llu]\n", resource, pid,
68            rl.rlim_cur, rl.rlim_max);
69    rc = prlimit64(pid, resource, &rl, NULL);
70    if (rc < 0) {
71        perror("prlimit");
72        exit(EXIT_FAILURE);
73    }
74
75    return 0;
76}
77