Adding upstream version 5.0.upstream/5.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 200 insertions, 0 deletions

diff --git a/builtins/source.def b/builtins/source.def
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--- /dev/null
+++ b/builtins/source.def
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+This file is source.def, from which is created source.c.
+It implements the builtins "." and  "source" in Bash.
+
+Copyright (C) 1987-2015 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 3 of the License, 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.  If not, see <http://www.gnu.org/licenses/>.
+
+$PRODUCES source.c
+
+$BUILTIN source
+$FUNCTION source_builtin
+$SHORT_DOC source filename [arguments]
+Execute commands from a file in the current shell.
+
+Read and execute commands from FILENAME in the current shell.  The
+entries in $PATH are used to find the directory containing FILENAME.
+If any ARGUMENTS are supplied, they become the positional parameters
+when FILENAME is executed.
+
+Exit Status:
+Returns the status of the last command executed in FILENAME; fails if
+FILENAME cannot be read.
+$END
+
+$BUILTIN .
+$DOCNAME dot
+$FUNCTION source_builtin
+$SHORT_DOC . filename [arguments]
+Execute commands from a file in the current shell.
+
+Read and execute commands from FILENAME in the current shell.  The
+entries in $PATH are used to find the directory containing FILENAME.
+If any ARGUMENTS are supplied, they become the positional parameters
+when FILENAME is executed.
+
+Exit Status:
+Returns the status of the last command executed in FILENAME; fails if
+FILENAME cannot be read.
+$END
+
+#include <config.h>
+
+#include "../bashtypes.h"
+#include "posixstat.h"
+#include "filecntl.h"
+#if ! defined(_MINIX) && defined (HAVE_SYS_FILE_H)
+#  include <sys/file.h>
+#endif
+#include <errno.h>
+
+#if defined (HAVE_UNISTD_H)
+#  include <unistd.h>
+#endif
+
+#include "../bashansi.h"
+#include "../bashintl.h"
+
+#include "../shell.h"
+#include "../execute_cmd.h"
+#include "../flags.h"
+#include "../findcmd.h"
+#include "common.h"
+#include "bashgetopt.h"
+#include "../trap.h"
+
+#if !defined (errno)
+extern int errno;
+#endif /* !errno */
+
+static void maybe_pop_dollar_vars __P((void));
+
+/* If non-zero, `.' uses $PATH to look up the script to be sourced. */
+int source_uses_path = 1;
+
+/* If non-zero, `.' looks in the current directory if the filename argument
+   is not found in the $PATH. */
+int source_searches_cwd = 1;
+
+/* If this . script is supplied arguments, we save the dollar vars and
+   replace them with the script arguments for the duration of the script's
+   execution.  If the script does not change the dollar vars, we restore
+   what we saved.  If the dollar vars are changed in the script, and we are
+   not executing a shell function, we leave the new values alone and free
+   the saved values. */
+static void
+maybe_pop_dollar_vars ()
+{
+  if (variable_context == 0 && (dollar_vars_changed () & ARGS_SETBLTIN))
+    dispose_saved_dollar_vars ();
+  else
+    pop_dollar_vars ();
+  if (debugging_mode)
+    pop_args ();	/* restore BASH_ARGC and BASH_ARGV */
+  set_dollar_vars_unchanged ();
+  invalidate_cached_quoted_dollar_at ();	/* just invalidate to be safe */
+}
+
+/* Read and execute commands from the file passed as argument.  Guess what.
+   This cannot be done in a subshell, since things like variable assignments
+   take place in there.  So, I open the file, place it into a large string,
+   close the file, and then execute the string. */
+int
+source_builtin (list)
+     WORD_LIST *list;
+{
+  int result;
+  char *filename, *debug_trap, *x;
+
+  if (no_options (list))
+    return (EX_USAGE);
+  list = loptend;
+
+  if (list == 0)
+    {
+      builtin_error (_("filename argument required"));
+      builtin_usage ();
+      return (EX_USAGE);
+    }
+
+#if defined (RESTRICTED_SHELL)
+  if (restricted && strchr (list->word->word, '/'))
+    {
+      sh_restricted (list->word->word);
+      return (EXECUTION_FAILURE);
+    }
+#endif
+
+  filename = (char *)NULL;
+  /* XXX -- should this be absolute_pathname? */
+  if (posixly_correct && strchr (list->word->word, '/'))
+    filename = savestring (list->word->word);
+  else if (absolute_pathname (list->word->word))
+    filename = savestring (list->word->word);
+  else if (source_uses_path)
+    filename = find_path_file (list->word->word);
+  if (filename == 0)
+    {
+      if (source_searches_cwd == 0)
+	{
+	  x = printable_filename (list->word->word, 0);
+	  builtin_error (_("%s: file not found"), x);
+	  if (x != list->word->word)
+	    free (x);
+	  if (posixly_correct && interactive_shell == 0 && executing_command_builtin == 0)
+	    {
+	      last_command_exit_value = 1;
+	      jump_to_top_level (EXITPROG);
+	    }
+	  return (EXECUTION_FAILURE);
+	}
+      else
+	filename = savestring (list->word->word);
+    }
+
+  begin_unwind_frame ("source");
+  add_unwind_protect (xfree, filename);
+
+  if (list->next)
+    {
+      push_dollar_vars ();
+      add_unwind_protect ((Function *)maybe_pop_dollar_vars, (char *)NULL);
+      if (debugging_mode || shell_compatibility_level <= 44)
+	init_bash_argv ();	/* Initialize BASH_ARGV and BASH_ARGC */
+      remember_args (list->next, 1);
+      if (debugging_mode)
+	push_args (list->next);	/* Update BASH_ARGV and BASH_ARGC */
+    }
+  set_dollar_vars_unchanged ();
+
+  /* Don't inherit the DEBUG trap unless function_trace_mode (overloaded)
+     is set.  XXX - should sourced files inherit the RETURN trap?  Functions
+     don't. */
+  debug_trap = TRAP_STRING (DEBUG_TRAP);
+  if (debug_trap && function_trace_mode == 0)
+    {
+      debug_trap = savestring (debug_trap);
+      add_unwind_protect (xfree, debug_trap);
+      add_unwind_protect (maybe_set_debug_trap, debug_trap);
+      restore_default_signal (DEBUG_TRAP);
+    }
+
+  result = source_file (filename, (list && list->next));
+
+  run_unwind_frame ("source");
+
+  return (result);
+}