1 /*
2 * Check decoding of getrlimit/ugetrlimit syscall.
3 *
4 * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #include <errno.h>
31 #include <stdint.h>
32 #include <stdio.h>
33 #include <sys/resource.h>
34 #include <unistd.h>
35
36 #include "xlat.h"
37 #include "xlat/resources.h"
38
39 const char *
sprint_rlim(kernel_ulong_t lim)40 sprint_rlim(kernel_ulong_t lim)
41 {
42 if (sizeof(lim) == sizeof(uint64_t)) {
43 if (lim == (kernel_ulong_t) -1ULL)
44 return "RLIM64_INFINITY";
45 } else {
46 if (lim == (kernel_ulong_t) -1U)
47 return "RLIM_INFINITY";
48 }
49
50 static char buf[2][sizeof(lim)*3 + sizeof("*1024")];
51 static int i;
52 i &= 1;
53 if (lim > 1024 && lim % 1024 == 0)
54 sprintf(buf[i], "%llu*1024", (unsigned long long) lim / 1024);
55 else
56 sprintf(buf[i], "%llu", (unsigned long long) lim);
57
58 return buf[i++];
59 }
60
61 #ifdef NR_GETRLIMIT
62
63 int
main(void)64 main(void)
65 {
66 kernel_ulong_t *const rlimit = tail_alloc(sizeof(*rlimit) * 2);
67 const struct xlat *xlat;
68
69 for (xlat = resources; xlat->str; ++xlat) {
70 unsigned long res = 0xfacefeed00000000ULL | xlat->val;
71 long rc = syscall(NR_GETRLIMIT, res, 0);
72 if (rc && ENOSYS == errno)
73 perror_msg_and_skip(STR_GETRLIMIT);
74 printf("%s(%s, NULL) = %ld %s (%m)\n",
75 STR_GETRLIMIT, xlat->str, rc, errno2name());
76
77 rc = syscall(NR_GETRLIMIT, res, rlimit);
78 if (rc)
79 printf("%s(%s, NULL) = %ld %s (%m)\n",
80 STR_GETRLIMIT, xlat->str, rc, errno2name());
81 else
82 printf("%s(%s, {rlim_cur=%s, rlim_max=%s})"
83 " = 0\n", STR_GETRLIMIT, xlat->str,
84 sprint_rlim(rlimit[0]), sprint_rlim(rlimit[1]));
85 }
86
87 puts("+++ exited with 0 +++");
88 return 0;
89 }
90
91 #endif /* NR_GETRLIMIT */
92