tests/test-execute-script.c

   1 /* Test of execute.
   2    Copyright (C) 2020-2024 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation, either version 3, or (at your option)
   7    any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, see <https://www.gnu.org/licenses/>.  */
  16
  17 #include <config.h>
  18
  19 #include "execute.h"
  20
  21 #include <stdio.h>
  22 #include <string.h>
  23 #include <unistd.h>
  24
  25 #include "read-file.h"
  26 #include "macros.h"
  27
  28 #define DATA_FILENAME "test-execute-script.tmp"
  29
  30 int
  31 main ()
  32 {
  33   unlink (DATA_FILENAME);
  34
  35   /* Check an invocation of an executable script.
  36      This should only be supported if the script has a '#!' marker; otherwise
  37      it is unsecure: <https://sourceware.org/bugzilla/show_bug.cgi?id=13134>.
  38      POSIX says that the execlp() and execvp() functions support executing
  39      shell scripts
  40      <https://pubs.opengroup.org/onlinepubs/9699919799/functions/exec.html>,
  41      but this is considered an antiquated feature.  */
  42
  43   /* This test is an extension of
  44      "Check stdout is inherited, part 1 (regular file)"
  45      in test-execute-main.c.  */
  46   FILE *fp = freopen (DATA_FILENAME, "w", stdout);
  47   ASSERT (fp != NULL);
  48
  49   {
  50     size_t i;
  51
  52     for (i = 0; i < 2; i++)
  53       {
  54         const char *progname =
  55           (i == 0 ? "executable-script" : "executable-script.sh");
  56         const char *prog_path =
  57           (i == 0 ? SRCDIR "executable-script" : SRCDIR "executable-script.sh");
  58         const char *prog_argv[2] = { prog_path, NULL };
  59
  60         int ret = execute (progname, prog_argv[0], prog_argv, NULL,
  61                            false, false, false, false, true, false, NULL);
  62         ASSERT (ret == 127);
  63       }
  64   }
  65
  66 #if defined _WIN32 && !defined __CYGWIN__
  67   /* On native Windows, scripts - even with '#!' marker - are not executable.
  68      Only .bat and .cmd files are.  */
  69   ASSERT (fclose (fp) == 0);
  70   ASSERT (unlink (DATA_FILENAME) == 0);
  71   if (test_exit_status)
  72     return test_exit_status;
  73   fprintf (stderr, "Skipping test: scripts are not executable on this platform.\n");
  74   return 77;
  75 #else
  76   {
  77     const char *progname = "executable-shell-script";
  78     const char *prog_path = SRCDIR "executable-shell-script";
  79     const char *prog_argv[2] = { prog_path, NULL };
  80
  81     int ret = execute (progname, prog_argv[0], prog_argv, NULL,
  82                        false, false, false, false, true, false, NULL);
  83     ASSERT (ret == 0);
  84
  85     ASSERT (fclose (fp) == 0);
  86
  87     size_t length;
  88     char *contents = read_file (DATA_FILENAME, 0, &length);
  89     ASSERT (length == 11 && memcmp (contents, "Halle Potta", 11) == 0);
  90   }
  91
  92   ASSERT (unlink (DATA_FILENAME) == 0);
  93
  94   return test_exit_status;
  95 #endif
  96 }