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1 /*
2  * Check decoding of prlimit64 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 "tests.h"
31 #include <asm/unistd.h>
32 
33 #ifdef __NR_prlimit64
34 
35 # include <inttypes.h>
36 # include <stdio.h>
37 # include <stdint.h>
38 # include <sys/resource.h>
39 # include <unistd.h>
40 
41 # include "xlat.h"
42 # include "xlat/resources.h"
43 
44 const char *
sprint_rlim(uint64_t lim)45 sprint_rlim(uint64_t lim)
46 {
47 	if (lim == -1ULL)
48 		return "RLIM64_INFINITY";
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], "%" PRIu64 "*1024", lim / 1024);
55 	else
56 		sprintf(buf[i], "%" PRIu64, lim);
57 
58 	return buf[i++];
59 }
60 
61 int
main(void)62 main(void)
63 {
64 	unsigned long pid =
65 		(unsigned long) 0xdefaced00000000ULL | (unsigned) getpid();
66 	uint64_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_prlimit64, pid, res, 0, rlimit);
72 		if (rc)
73 			printf("prlimit64(%d, %s, NULL, %p) = %ld %s (%m)\n",
74 			       (unsigned) pid, xlat->str, rlimit,
75 			       rc, errno2name());
76 		else
77 			printf("prlimit64(%d, %s, NULL"
78 			       ", {rlim_cur=%s, rlim_max=%s}) = 0\n",
79 			       (unsigned) pid, xlat->str,
80 			       sprint_rlim(rlimit[0]),
81 			       sprint_rlim(rlimit[1]));
82 	}
83 
84 	puts("+++ exited with 0 +++");
85 	return 0;
86 }
87 
88 #else
89 
90 SKIP_MAIN_UNDEFINED("__NR_prlimit64")
91 
92 #endif
93