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/* 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 "../bashtypes.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
#define FEVAL_HISTORY 0x020
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, pflags;
char *string;
struct stat finfo;
size_t file_size;
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);
}
file_size = (size_t)finfo.st_size;
/* Check for overflow with large files. */
if (file_size != finfo.st_size || file_size + 1 < file_size)
{
(*errfunc) ("%s: file is too large", filename);
return ((flags & FEVAL_BUILTIN) ? EXECUTION_FAILURE : -1);
}
string = xmalloc (1 + file_size);
result = read (fd, string, file_size);
string[result] = '\0';
return_val = errno;
close (fd);
errno = return_val;
if (result < 0) /* XXX was != file_size, not < 0 */
{
free (string);
goto file_error_and_exit;
}
if (result == 0)
{
free (string);
return ((flags & FEVAL_BUILTIN) ? EXECUTION_SUCCESS : 1);
}
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++;
/* set the flags to be passed to parse_and_execute */
pflags = (flags & FEVAL_HISTORY) ? 0 : SEVAL_NOHIST;
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, pflags);
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;
}
#if defined (HISTORY)
int
fc_execute_file (filename)
char *filename;
{
int flags;
/* We want these commands to show up in the history list if
remember_on_history is set. */
flags = FEVAL_ENOENTOK|FEVAL_HISTORY;
return (_evalfile (filename, flags));
}
#endif /* HISTORY */
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));
}
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