busybox

/* vi: set sw=4 ts=4: */

/*

 * mode_string implementation for busybox

 *

 * Copyright (C) 2003  Manuel Novoa III  <mjn3@codepoet.org>

 *

 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.

 */

​

/* Aug 13, 2003

 * Fix a bug reported by junkio@cox.net involving the mode_chars index.

 */

​

​

#include <assert.h>

#include <sys/stat.h>

​

#include "libbb.h"

​

#if ( S_ISUID != 04000 ) || ( S_ISGID != 02000 ) || ( S_ISVTX != 01000 ) \

 || ( S_IRUSR != 00400 ) || ( S_IWUSR != 00200 ) || ( S_IXUSR != 00100 ) \

 || ( S_IRGRP != 00040 ) || ( S_IWGRP != 00020 ) || ( S_IXGRP != 00010 ) \

 || ( S_IROTH != 00004 ) || ( S_IWOTH != 00002 ) || ( S_IXOTH != 00001 )

#error permission bitflag value assumption(s) violated!

#endif

​

#if ( S_IFSOCK!= 0140000 ) || ( S_IFLNK != 0120000 ) \

 || ( S_IFREG != 0100000 ) || ( S_IFBLK != 0060000 ) \

 || ( S_IFDIR != 0040000 ) || ( S_IFCHR != 0020000 ) \

 || ( S_IFIFO != 0010000 )

#warning mode type bitflag value assumption(s) violated! falling back to larger version

​

#if (S_IRWXU | S_IRWXG | S_IRWXO | S_ISUID | S_ISGID | S_ISVTX) == 07777

#undef mode_t

#define mode_t unsigned short

#endif

​

static const mode_t mode_flags[] = {

    S_IRUSR, S_IWUSR, S_IXUSR, S_ISUID,

    S_IRGRP, S_IWGRP, S_IXGRP, S_ISGID,

    S_IROTH, S_IWOTH, S_IXOTH, S_ISVTX

};

​

/* The static const char arrays below are duplicated for the two cases

 * because moving them ahead of the mode_flags declaration cause a text

 * size increase with the gcc version I'm using. */

​

/* The previous version used "0pcCd?bB-?l?s???".  However, the '0', 'C',

 * and 'B' types don't appear to be available on linux.  So I removed them. */

static const char type_chars[16] = "?pc?d?b?-?l?s???";

/*                                  0123456789abcdef */

static const char mode_chars[7] = "rwxSTst";

​

const char *bb_mode_string(int mode)

{

    static char buf[12];

    char *p = buf;

​

    int i, j, k;

​

    *p = type_chars[ (mode >> 12) & 0xf ];

    i = 0;

    do {