Imported from ../bash-2.0.tar.gz.

builtins/evalfile.c

@@ -0,0 +1,211 @@
+/* Copyright (C) 1996 Free Software Foundation, Inc.
+
+   This file is part of GNU Bash, the Bourne Again SHell.
+
+   Bash 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 1, or (at your option) any later
+   version.
+
+   Bash 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 Bash; see the file COPYING.  If not, write to the Free Software
+   Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include <config.h>
+
+#if defined (HAVE_UNISTD_H)
+#  include <unistd.h>
+#endif
+
+#include <sys/types.h>
+#include "../posixstat.h"
+#include "../filecntl.h"
+
+#include <stdio.h>
+#include <signal.h>
+#include <errno.h>
+
+#include "../bashansi.h"
+
+#include "../shell.h"
+#include "../jobs.h"
+#include "../builtins.h"
+#include "../flags.h"
+#include "../input.h"
+#include "../execute_cmd.h"
+
+#if defined (HISTORY)
+#  include "../bashhist.h"
+#endif
+
+#include "common.h"
+
+#if !defined (errno)
+extern int errno;
+#endif
+
+/* Flags for _evalfile() */
+#define FEVAL_ENOENTOK		0x001
+#define FEVAL_BUILTIN		0x002
+#define FEVAL_UNWINDPROT	0x004
+#define FEVAL_NONINT		0x008
+#define FEVAL_LONGJMP		0x010
+
+extern int interactive, interactive_shell, posixly_correct;
+extern int indirection_level, startup_state, subshell_environment;
+extern int return_catch_flag, return_catch_value;
+extern int last_command_exit_value;
+
+/* How many `levels' of sourced files we have. */
+int sourcelevel = 0;
+
+static int
+_evalfile (filename, flags)
+     char *filename;
+     int flags;
+{
+  volatile int old_interactive;
+  procenv_t old_return_catch;
+  int return_val, fd, result;
+  char *string;
+  struct stat finfo;
+  VFunction *errfunc;
+
+  fd = open (filename, O_RDONLY);
+
+  if (fd < 0 || (fstat (fd, &finfo) == -1))
+    {
+file_error_and_exit:
+      if (((flags & FEVAL_ENOENTOK) == 0) || errno != ENOENT)
+	file_error (filename);
+
+      if (flags & FEVAL_LONGJMP)
+        {
+	  last_command_exit_value = 1;
+	  jump_to_top_level (EXITPROG);
+	}
+
+      return ((flags & FEVAL_BUILTIN) ? EXECUTION_FAILURE
+      				      : ((errno == ENOENT) ? 0 : -1));
+    }
+
+  errfunc = (VFunction *)((flags & FEVAL_BUILTIN) ? builtin_error : internal_error);
+
+  if (S_ISDIR (finfo.st_mode))
+    {
+      (*errfunc) ("%s: is a directory", filename);
+      return ((flags & FEVAL_BUILTIN) ? EXECUTION_FAILURE : -1);
+    }
+  else if (S_ISREG (finfo.st_mode) == 0)
+    {
+      (*errfunc) ("%s: not a regular file", filename);
+      return ((flags & FEVAL_BUILTIN) ? EXECUTION_FAILURE : -1);
+    }
+
+  string = xmalloc (1 + (int)finfo.st_size);
+  result = read (fd, string, finfo.st_size);
+  string[result] = '\0';
+
+  return_val = errno;
+  close (fd);
+  errno = return_val;
+
+  if (result != (int)finfo.st_size)
+    {
+      free (string);
+      goto file_error_and_exit;
+    }
+
+  if (check_binary_file ((unsigned char *)string, (result > 80) ? 80 : result))
+    {
+      free (string);
+      (*errfunc) ("%s: cannot execute binary file", filename);
+      return ((flags & FEVAL_BUILTIN) ? EX_BINARY_FILE : -1);
+    }
+
+  if (flags & FEVAL_UNWINDPROT)
+    {
+      begin_unwind_frame ("_evalfile");
+
+      unwind_protect_int (return_catch_flag);
+      unwind_protect_jmp_buf (return_catch);
+      if (flags & FEVAL_NONINT)
+	unwind_protect_int (interactive);
+      unwind_protect_int (sourcelevel);
+    }
+  else
+    {
+      COPY_PROCENV (return_catch, old_return_catch);
+      if (flags & FEVAL_NONINT)
+	old_interactive = interactive;
+    }
+
+  if (flags & FEVAL_NONINT)
+    interactive = 0;
+
+  return_catch_flag++;
+  sourcelevel++;
+
+  if (flags & FEVAL_BUILTIN)
+    result = EXECUTION_SUCCESS;
+
+  return_val = setjmp (return_catch);
+
+  /* If `return' was seen outside of a function, but in the script, then
+     force parse_and_execute () to clean up. */
+  if (return_val)
+    {
+      parse_and_execute_cleanup ();
+      result = return_catch_value;
+    }
+  else
+    result = parse_and_execute (string, filename, -1);
+
+  if (flags & FEVAL_UNWINDPROT)
+    run_unwind_frame ("_evalfile");
+  else
+    {
+      if (flags & FEVAL_NONINT)
+	interactive = old_interactive;
+      return_catch_flag--;
+      sourcelevel--;
+      COPY_PROCENV (old_return_catch, return_catch);
+    }
+
+  return ((flags & FEVAL_BUILTIN) ? result : 1);
+}
+
+int
+maybe_execute_file (fname, force_noninteractive)
+     char *fname;
+     int force_noninteractive;
+{
+  char *filename;
+  int result, flags;
+
+  filename = bash_tilde_expand (fname);
+  flags = FEVAL_ENOENTOK;
+  if (force_noninteractive)
+    flags |= FEVAL_NONINT;
+  result = _evalfile (filename, flags);
+  free (filename);
+  return result;
+}
+
+int
+source_file (filename)
+     char *filename;
+{
+  int flags;
+
+  flags = FEVAL_BUILTIN|FEVAL_UNWINDPROT|FEVAL_NONINT;
+  /* POSIX shells exit if non-interactive and file error. */
+  if (posixly_correct && !interactive_shell)
+    flags |= FEVAL_LONGJMP;
+  return (_evalfile (filename, flags));
+}