execute: Add tests.

* tests/test-execute.sh: New file.
* tests/test-execute-main.c: New file.
* tests/test-execute-child.c: New file.
* modules/execute-tests: New file.

1 files changed, 176 insertions, 0 deletions

diff --git a/tests/test-execute-child.c b/tests/test-execute-child.c
new file mode 100644
index 0000000000..2994476bb7
--- /dev/null
+++ b/tests/test-execute-child.c
@@ -0,0 +1,176 @@
+/* Child program invoked by test-execute-main.
+   Copyright (C) 2009-2020 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <fcntl.h>
+#include <signal.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/stat.h>
+
+#if defined _WIN32 && ! defined __CYGWIN__
+/* Get declarations of the native Windows API functions.  */
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+/* Get _get_osfhandle.  */
+# include <io.h>
+#endif
+
+/* In this file, we use only system functions, no overrides from gnulib.  */
+#undef atoi
+#undef fcntl
+#undef fflush
+#undef fgetc
+#undef fprintf
+#undef fputs
+#undef fstat
+#undef raise
+#undef sprintf
+#undef stat
+#undef strcmp
+#undef strlen
+
+#if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+static void __cdecl
+gl_msvc_invalid_parameter_handler (const wchar_t *expression,
+                                   const wchar_t *function,
+                                   const wchar_t *file,
+                                   unsigned int line,
+                                   uintptr_t dummy)
+{
+}
+#endif
+
+/* Return non-zero if FD is open.  */
+static int
+is_open (int fd)
+{
+#if defined _WIN32 && ! defined __CYGWIN__
+  /* On native Windows, the initial state of unassigned standard file
+     descriptors is that they are open but point to an
+     INVALID_HANDLE_VALUE, and there is no fcntl.  */
+  return (HANDLE) _get_osfhandle (fd) != INVALID_HANDLE_VALUE;
+#else
+# ifndef F_GETFL
+#  error Please port fcntl to your platform
+# endif
+  return 0 <= fcntl (fd, F_GETFL);
+#endif
+}
+
+int
+main (int argc, char *argv[])
+{
+  if (argc == 1)
+    /* Check an invocation without arguments.  Check the exit code.  */
+    return 40;
+
+  int test = atoi (argv[1]);
+  switch (test)
+    {
+    case 2:
+      /* Check argument passing.  */
+      return !(argc == 12
+               && strcmp (argv[2], "abc def") == 0
+               && strcmp (argv[3], "abc\"def\"ghi") == 0
+               && strcmp (argv[4], "xyz\"") == 0
+               && strcmp (argv[5], "abc\\def\\ghi") == 0
+               && strcmp (argv[6], "xyz\\") == 0
+               && strcmp (argv[7], "???") == 0
+               && strcmp (argv[8], "***") == 0
+               && strcmp (argv[9], "") == 0
+               && strcmp (argv[10], "foo") == 0
+               && strcmp (argv[11], "") == 0);
+    #if !(defined _WIN32 && !defined __CYGWIN__)
+    case 3:
+      /* Check SIGPIPE handling with ignore_sigpipe = false.  */
+    case 4:
+      /* Check SIGPIPE handling with ignore_sigpipe = true.  */
+      raise (SIGPIPE);
+      return 71;
+    #endif
+    case 5:
+      /* Check other signal.  */
+      raise (SIGINT);
+      return 71;
+    case 6:
+      /* Check stdin is inherited.  */
+      return !(fgetc (stdin) == 'F' && fgetc (stdin) == 'o');
+    case 7:
+      /* Check null_stdin = true.  */
+      return !(fgetc (stdin) == EOF);
+    case 8:
+      /* Check stdout is inherited, part 1 (regular file).  */
+      return !(fputs ("bar", stdout) != EOF && fflush (stdout) == 0);
+    case 9:
+      /* Check stdout is inherited, part 2 (device).  */
+    case 10:
+      /* Check null_stdout = true.  */
+      {
+        struct stat st;
+        return !(fstat (STDOUT_FILENO, &st) >= 0 && !S_ISREG (st.st_mode));
+      }
+    case 11:
+      /* Check stderr is inherited, part 1 (regular file).  */
+      return !(fputs ("bar", stderr) != EOF && fflush (stderr) == 0);
+    case 12:
+      /* Check stderr is inherited, part 2 (device).  */
+    case 13:
+      /* Check null_stderr = true.  */
+      {
+        struct stat st;
+        return !(fstat (STDERR_FILENO, &st) >= 0 && !S_ISREG (st.st_mode));
+      }
+    case 14:
+    case 15:
+      /* Check file descriptors >= 3 can be inherited.  */
+    case 16:
+      /* Check file descriptors >= 3 with O_CLOEXEC bit are not inherited.  */
+      #if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+      /* Avoid exceptions from within _get_osfhandle.  */
+      _set_invalid_parameter_handler (gl_msvc_invalid_parameter_handler);
+      #endif
+      {
+        char buf[300];
+        buf[0] = '\0';
+        char *p = buf;
+        int fd;
+        for (fd = 0; fd < 20; fd++)
+          #ifdef __NetBSD__
+          if (fd != 3)
+          #endif
+            if (is_open (fd))
+              {
+                sprintf (p, "%d ", fd);
+                p += strlen (p);
+              }
+        const char *expected = (test < 16 ? "0 1 2 10 " : "0 1 2 ");
+        if (strcmp (buf, expected) == 0)
+          return 0;
+        else
+          {
+            fprintf (stderr, "Test case %d: %s\n", test, buf); fflush (stderr);
+            return 1;
+          }
+      }
+    default:
+      abort ();
+    }
+}