stdlib/tst-system.c

   1 /* Copyright (C) 2002-2021 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <stdlib.h>
  20 #include <unistd.h>
  21 #include <string.h>
  22 #include <signal.h>
  23 #include <paths.h>
  24
  25 #include <support/capture_subprocess.h>
  26 #include <support/check.h>
  27 #include <support/temp_file.h>
  28 #include <support/support.h>
  29 #include <support/xunistd.h>
  30
  31 static char *tmpdir;
  32 static long int namemax;
  33
  34 static void
  35 do_prepare (int argc, char *argv[])
  36 {
  37   tmpdir = support_create_temp_directory ("tst-system-");
  38   /* Include the last '/0'.  */
  39   namemax = pathconf (tmpdir, _PC_NAME_MAX) + 1;
  40   TEST_VERIFY_EXIT (namemax != -1);
  41 }
  42 #define PREPARE do_prepare
  43
  44 struct args
  45 {
  46   const char *command;
  47   int exit_status;
  48   int term_sig;
  49   const char *path;
  50 };
  51
  52 static void
  53 call_system (void *closure)
  54 {
  55   struct args *args = (struct args *) closure;
  56   int ret;
  57
  58   if (args->path != NULL)
  59     TEST_COMPARE (setenv ("PATH", args->path, 1), 0);
  60   ret = system (args->command);
  61   if (args->term_sig == 0)
  62     {
  63       /* Expect regular termination.  */
  64       TEST_VERIFY (WIFEXITED (ret) != 0);
  65       TEST_COMPARE (WEXITSTATUS (ret), args->exit_status);
  66     }
  67   else
  68     {
  69       /* status_or_signal < 0.  Expect termination by signal.  */
  70       TEST_VERIFY (WIFSIGNALED (ret) != 0);
  71       TEST_COMPARE (WTERMSIG (ret), args->term_sig);
  72     }
  73 }
  74
  75 static int
  76 do_test (void)
  77 {
  78   TEST_VERIFY (system (NULL) != 0);
  79
  80   {
  81     char cmd[namemax];
  82     memset (cmd, 'a', sizeof(cmd));
  83     cmd[sizeof(cmd) - 1] = '\0';
  84
  85     struct support_capture_subprocess result;
  86     result = support_capture_subprocess (call_system,
  87                                          &(struct args) {
  88                                            cmd, 127, 0, tmpdir
  89                                          });
  90     support_capture_subprocess_check (&result, "system", 0, sc_allow_stderr);
  91
  92     char *returnerr = xasprintf ("%s: execing %s failed: "
  93                                  "No such file or directory",
  94                                  basename(_PATH_BSHELL), cmd);
  95     TEST_COMPARE_STRING (result.err.buffer, returnerr);
  96     free (returnerr);
  97   }
  98
  99   {
 100     char cmd[namemax + 1];
 101     memset (cmd, 'a', sizeof(cmd));
 102     cmd[sizeof(cmd) - 1] = '\0';
 103
 104     struct support_capture_subprocess result;
 105     result = support_capture_subprocess (call_system,
 106                                          &(struct args) {
 107                                            cmd, 127, 0, tmpdir
 108                                          });
 109     support_capture_subprocess_check (&result, "system", 0, sc_allow_stderr);
 110
 111     char *returnerr = xasprintf ("%s: execing %s failed: "
 112                                  "File name too long",
 113                                  basename(_PATH_BSHELL), cmd);
 114     TEST_COMPARE_STRING (result.err.buffer, returnerr);
 115     free (returnerr);
 116   }
 117
 118   {
 119     struct support_capture_subprocess result;
 120     result = support_capture_subprocess (call_system,
 121                                          &(struct args) {
 122                                            "kill $$", 0, SIGTERM
 123                                          });
 124     support_capture_subprocess_check (&result, "system", 0, sc_allow_none);
 125   }
 126
 127   {
 128     struct support_capture_subprocess result;
 129     result = support_capture_subprocess (call_system,
 130                                          &(struct args) { "echo ...", 0 });
 131     support_capture_subprocess_check (&result, "system", 0, sc_allow_stdout);
 132     TEST_COMPARE_STRING (result.out.buffer, "...\n");
 133   }
 134
 135   {
 136     struct support_capture_subprocess result;
 137     result = support_capture_subprocess (call_system,
 138                                          &(struct args) { "exit 1", 1 });
 139     support_capture_subprocess_check (&result, "system", 0, sc_allow_none);
 140   }
 141
 142   {
 143     struct stat64 st;
 144     xstat (_PATH_BSHELL, &st);
 145     mode_t mode = st.st_mode;
 146     xchmod (_PATH_BSHELL, mode & ~(S_IXUSR | S_IXGRP | S_IXOTH));
 147
 148     struct support_capture_subprocess result;
 149     result = support_capture_subprocess (call_system,
 150                                          &(struct args) {
 151                                            "exit 1", 127, 0
 152                                          });
 153     support_capture_subprocess_check (&result, "system", 0, sc_allow_none);
 154
 155     xchmod (_PATH_BSHELL, st.st_mode);
 156   }
 157
 158   TEST_COMPARE (system (""), 0);
 159
 160   return 0;
 161 }
 162
 163 #include <support/test-driver.c>