fix: noconfirm auto-selects first AUR match

local/recipes/dev/m4/source/tests/test-posix_spawn-script.c

@@ -0,0 +1,154 @@
+/* Test of posix_spawn() function.
+   Copyright (C) 2020-2026 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 <spawn.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
+#include "macros.h"
+
+#define DATA_FILENAME "test-posix_spawn-script.tmp"
+
+int
+main ()
+{
+  unlink (DATA_FILENAME);
+
+  /* Check an invocation of an executable script.
+     This should only be supported if the script has a '#!' marker; otherwise
+     it is unsecure: <https://sourceware.org/PR13134>.
+     POSIX says that the execlp() and execvp() functions support executing
+     shell scripts
+     <https://pubs.opengroup.org/onlinepubs/9699919799/functions/exec.html>,
+     but this is considered an antiquated feature.  */
+  pid_t child;
+
+  posix_spawn_file_actions_t actions;
+  ASSERT (posix_spawn_file_actions_init (&actions) == 0);
+  ASSERT (posix_spawn_file_actions_addopen (&actions, STDOUT_FILENO,
+                                            DATA_FILENAME,
+                                            O_RDWR | O_CREAT | O_TRUNC, 0600)
+          == 0);
+
+  for (size_t i = 0; i < 2; i++)
+    {
+      const char *prog_path =
+        (i == 0 ? SRCDIR "executable-script" : SRCDIR "executable-script.sh");
+      const char *prog_argv[2] = { prog_path, NULL };
+
+      int err = posix_spawn (&child, prog_path, &actions, NULL,
+                             (char **) prog_argv, environ);
+      if (err != ENOEXEC)
+        {
+          if (err != 0)
+            {
+              errno = err;
+              perror ("posix_spawn");
+              return 1;
+            }
+
+          /* Wait for child.  */
+          int status = 0;
+          while (waitpid (child, &status, 0) != child)
+            ;
+          if (!WIFEXITED (status))
+            {
+              fprintf (stderr, "subprocess terminated with unexpected wait status %d\n", status);
+              return 1;
+            }
+          int exitstatus = WEXITSTATUS (status);
+          if (exitstatus != 127)
+            {
+              fprintf (stderr, "subprocess terminated with unexpected exit status %d\n", exitstatus);
+              return 1;
+            }
+        }
+    }
+
+#if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, scripts - even with '#!' marker - are not executable.
+     Only .bat and .cmd files are.  */
+  if (test_exit_status != EXIT_SUCCESS)
+    return test_exit_status;
+  fprintf (stderr, "Skipping test: scripts are not executable on this platform.\n");
+  return 77;
+#else
+  {
+    const char *prog_path = SRCDIR "executable-shell-script";
+    const char *prog_argv[2] = { prog_path, NULL };
+
+    int err = posix_spawn (&child, prog_path, &actions, NULL,
+                           (char **) prog_argv, environ);
+    if (err != 0)
+      {
+        errno = err;
+        perror ("posix_spawn");
+        return 1;
+      }
+
+    posix_spawn_file_actions_destroy (&actions);
+
+    /* Wait for child.  */
+    int status = 0;
+    while (waitpid (child, &status, 0) != child)
+      ;
+    if (!WIFEXITED (status))
+      {
+        fprintf (stderr, "subprocess terminated with unexpected wait status %d\n", status);
+        return 1;
+      }
+    int exitstatus = WEXITSTATUS (status);
+    if (exitstatus != 0)
+      {
+        fprintf (stderr, "subprocess terminated with unexpected exit status %d\n", exitstatus);
+        return 1;
+      }
+
+    /* Check the contents of the data file.  */
+    FILE *fp = fopen (DATA_FILENAME, "rb");
+    if (fp == NULL)
+      {
+        perror ("cannot open data file");
+        return 1;
+      }
+    char buf[1024];
+    int nread = fread (buf, 1, sizeof (buf), fp);
+    if (!(nread == 11 && memcmp (buf, "Halle Potta", 11) == 0))
+      {
+        fprintf (stderr, "data file wrong: has %d bytes, expected %d bytes\n", nread, 11);
+        return 1;
+      }
+    if (fclose (fp))
+      {
+        perror ("cannot close data file");
+        return 1;
+      }
+  }
+#endif
+
+  /* Clean up data file.  */
+  unlink (DATA_FILENAME);
+
+  return test_exit_status;
+}