granicus.if.org Git - strace/blob - tests/prlimit64.c

   1 /*
   2  * Check decoding of prlimit64 syscall.
   3  *
   4  * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
   5  * All rights reserved.
   6  *
   7  * SPDX-License-Identifier: GPL-2.0-or-later
   8  */
   9
  10 #include "tests.h"
  11 #include <asm/unistd.h>
  12
  13 #ifdef __NR_prlimit64
  14
  15 # include <inttypes.h>
  16 # include <stdio.h>
  17 # include <stdint.h>
  18 # include <sys/resource.h>
  19 # include <unistd.h>
  20
  21 # include "xlat.h"
  22 # include "xlat/resources.h"
  23
  24 const char *
  25 sprint_rlim(uint64_t lim)
  26 {
  27         if (lim == -1ULL)
  28                 return "RLIM64_INFINITY";
  29
  30         static char buf[2][sizeof(lim)*3 + sizeof("*1024")];
  31         static int i;
  32         i &= 1;
  33         if (lim > 1024 && lim % 1024 == 0)
  34                 sprintf(buf[i], "%" PRIu64 "*1024", lim / 1024);
  35         else
  36                 sprintf(buf[i], "%" PRIu64, lim);
  37
  38         return buf[i++];
  39 }
  40
  41 int
  42 main(void)
  43 {
  44         unsigned long pid =
  45                 (unsigned long) 0xdefaced00000000ULL | (unsigned) getpid();
  46         uint64_t *const rlimit = tail_alloc(sizeof(*rlimit) * 2);
  47         const struct xlat *xlat;
  48
  49         for (xlat = resources; xlat->str; ++xlat) {
  50                 unsigned long res = 0xfacefeed00000000ULL | xlat->val;
  51                 long rc = syscall(__NR_prlimit64, pid, res, 0, rlimit);
  52                 if (rc)
  53                         printf("prlimit64(%d, %s, NULL, %p) = %ld %s (%m)\n",
  54                                (unsigned) pid, xlat->str, rlimit,
  55                                rc, errno2name());
  56                 else
  57                         printf("prlimit64(%d, %s, NULL"
  58                                ", {rlim_cur=%s, rlim_max=%s}) = 0\n",
  59                                (unsigned) pid, xlat->str,
  60                                sprint_rlim(rlimit[0]),
  61                                sprint_rlim(rlimit[1]));
  62         }
  63
  64         puts("+++ exited with 0 +++");
  65         return 0;
  66 }
  67
  68 #else
  69
  70 SKIP_MAIN_UNDEFINED("__NR_prlimit64")
  71
  72 #endif