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

   1 /*
   2  * Check decoding of setfsuid/setfsgid/setfsuid32/setfsgid32 syscalls.
   3  *
   4  * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
   5  * Copyright (c) 2016-2018 The strace developers.
   6  * All rights reserved.
   7  *
   8  * SPDX-License-Identifier: GPL-2.0-or-later
   9  */
  10
  11 #include <stdio.h>
  12 #include <unistd.h>
  13
  14 void
  15 printuid(unsigned UGID_TYPE id)
  16 {
  17         if (id == (unsigned UGID_TYPE) -1U)
  18                 printf("-1");
  19         else
  20                 printf("%u", id);
  21 }
  22
  23 int
  24 main(void)
  25 {
  26         unsigned int ugid = GETUGID;
  27
  28         const kernel_ulong_t tests[] = {
  29                 ugid,
  30                 0xffff0000U | ugid,
  31                 F8ILL_KULONG_MASK | ugid,
  32                 0xffffU,
  33                 -1U,
  34                 -1L,
  35                 0xc0deffffU,
  36                 0xfacefeedU,
  37                 (long) 0xfacefeeddeadbeefULL
  38         };
  39
  40         unsigned int i;
  41
  42         for (i = 0; i < ARRAY_SIZE(tests); ++i) {
  43                 const unsigned int num = (unsigned UGID_TYPE) tests[i];
  44                 unsigned int rc;
  45
  46                 rc = syscall(SYSCALL_NR, tests[i]);
  47                 printf("%s(", SYSCALL_NAME);
  48                 printuid(num);
  49                 printf(") = %u\n", rc);
  50
  51                 rc = syscall(SYSCALL_NR, ugid);
  52                 printf("%s(%u) = %u\n", SYSCALL_NAME, ugid, rc);
  53         }
  54
  55         puts("+++ exited with 0 +++");
  56         return 0;
  57 }