Bash-5.3-alpha release

builtins/exec.def

@@ -1,7 +1,7 @@
 This file is exec.def, from which is created exec.c.
 It implements the builtin "exec" in Bash.
 
-Copyright (C) 1987-2021 Free Software Foundation, Inc.
+Copyright (C) 1987-2021,2022 Free Software Foundation, Inc.
 
 This file is part of GNU Bash, the Bourne Again SHell.
 
@@ -85,8 +85,7 @@ int no_exit_on_failed_exec;
 /* If the user wants this to look like a login shell, then
    prepend a `-' onto NAME and return the new name. */
 static char *
-mkdashname (name)
-     char *name;
+mkdashname (char *name)
 {
   char *ret;
 
@@ -97,15 +96,15 @@ mkdashname (name)
 }
 
 int
-exec_builtin (list)
-     WORD_LIST *list;
+exec_builtin (WORD_LIST *list)
 {
-  int exit_value = EXECUTION_FAILURE;
+  int exit_value;
   int cleanenv, login, opt, orig_job_control;
   char *argv0, *command, **args, **env, *newname, *com2;
 
   cleanenv = login = orig_job_control = 0;
   exec_argv0 = argv0 = (char *)NULL;
+  exit_value = EXECUTION_FAILURE;
 
   reset_internal_getopt ();
   while ((opt = internal_getopt (list, "cla:")) != -1)
@@ -225,12 +224,11 @@ exec_builtin (list)
     default_tty_job_signals ();		/* undo initialize_job_signals */
 #endif /* JOB_CONTROL */
 
-#if defined (BUFFERED_INPUT)
   if (default_buffered_input >= 0)
     sync_buffered_stream (default_buffered_input);
-#endif
 
   exit_value = shell_execve (command, args, env);
+  opt = errno;
 
   /* We have to set this to NULL because shell_execve has called realloc()
      to stuff more items at the front of the array, which may have caused
@@ -243,6 +241,7 @@ exec_builtin (list)
     goto failed_exec;
   else if (executable_file (command) == 0)
     {
+      errno = opt;
       builtin_error (_("%s: cannot execute: %s"), command, strerror (errno));
       exit_value = EX_NOEXEC;	/* As per Posix.2, 3.14.6 */
     }