hush/include/busybox.h
Rob Landley 193c8c7383 #ifdef reduction infrastructure, based on an argument between Shaun Jackman,
Rob Landley, and others.

Currently CONFIG options are defined or undefined, so we chop out code with
#ifdefs, ala:
#ifdef CONFIG_THING
  stuff();
#endif

This creates a new header file, bb_config.h, which sets the CONFIG entry to 1
or 0, and lets us do:

  if(CONFIG_THING) stuff();

And let the compiler do dead code elimination to get rid of it.  (Note: #ifdef
will still work because for the 1 case it's a static const int, not a #define.)
2005-07-27 06:55:36 +00:00

122 lines
3.3 KiB
C

/* vi: set sw=4 ts=4: */
/*
* Busybox main internal header file
*
*
* 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 2 of the License, 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Based in part on code from sash, Copyright (c) 1999 by David I. Bell
* Permission has been granted to redistribute this code under the GPL.
*
*/
#ifndef _BB_INTERNAL_H_
#define _BB_INTERNAL_H_ 1
#include "bb_config.h"
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <sys/stat.h>
#include <sys/types.h>
#if __GNU_LIBRARY__ < 5 && \
!defined(__dietlibc__) && \
!defined(_NEWLIB_VERSION)
#error "Sorry, this libc version is not supported :("
#endif
#ifndef BB_EXTRA_VERSION
#define BB_BANNER "BusyBox v" BB_VER " (" BB_BT ")"
#else
#define BB_BANNER "BusyBox v" BB_VER " (" BB_EXTRA_VERSION ")"
#endif
#ifdef DMALLOC
#include <dmalloc.h>
#endif
#include <features.h>
/* Pull in the utility routines from libbb */
#include "libbb.h"
enum Location {
_BB_DIR_ROOT = 0,
_BB_DIR_BIN,
_BB_DIR_SBIN,
_BB_DIR_USR_BIN,
_BB_DIR_USR_SBIN
};
enum SUIDRoot {
_BB_SUID_NEVER = 0,
_BB_SUID_MAYBE,
_BB_SUID_ALWAYS
};
struct BB_applet {
const char *name;
int (*main) (int argc, char **argv);
enum Location location:4;
enum SUIDRoot need_suid:4;
};
/* From busybox.c */
extern const struct BB_applet applets[];
/* Automagically pull in all the applet function prototypes and
* applet usage strings. These are all of the form:
* extern int foo_main(int argc, char **argv);
* extern const char foo_usage[];
* These are all autogenerated from the set of currently defined applets.
*/
#define PROTOTYPES
#include "applets.h"
#undef PROTOTYPES
#ifdef CONFIG_FEATURE_BUFFERS_GO_ON_STACK
#define RESERVE_CONFIG_BUFFER(buffer,len) char buffer[len]
#define RESERVE_CONFIG_UBUFFER(buffer,len) unsigned char buffer[len]
#define RELEASE_CONFIG_BUFFER(buffer) ((void)0)
#else
#ifdef CONFIG_FEATURE_BUFFERS_GO_IN_BSS
#define RESERVE_CONFIG_BUFFER(buffer,len) static char buffer[len]
#define RESERVE_CONFIG_UBUFFER(buffer,len) static unsigned char buffer[len]
#define RELEASE_CONFIG_BUFFER(buffer) ((void)0)
#else
#define RESERVE_CONFIG_BUFFER(buffer,len) char *buffer=xmalloc(len)
#define RESERVE_CONFIG_UBUFFER(buffer,len) unsigned char *buffer=xmalloc(len)
#define RELEASE_CONFIG_BUFFER(buffer) free (buffer)
#endif
#endif
#ifndef RB_POWER_OFF
/* Stop system and switch power off if possible. */
#define RB_POWER_OFF 0x4321fedc
#endif
/* Try to pull in PATH_MAX */
#include <limits.h>
/* for PATH_MAX on systems that don't have it in limits.h */
#include <sys/param.h>
#ifndef PATH_MAX
#define PATH_MAX 256
#endif
#endif /* _BB_INTERNAL_H_ */