123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128 |
- /* 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] ALIGN1 = "?pc?d?b?-?l?s???";
- /***************************************** 0123456789abcdef */
- static const char mode_chars[7] ALIGN1 = "rwxSTst";
- const char* FAST_FUNC bb_mode_string(mode_t mode)
- {
- static char buf[12];
- char *p = buf;
- int i, j, k;
- *p = type_chars[ (mode >> 12) & 0xf ];
- i = 0;
- do {
- j = k = 0;
- do {
- *++p = '-';
- if (mode & mode_flags[i+j]) {
- *p = mode_chars[j];
- k = j;
- }
- } while (++j < 3);
- if (mode & mode_flags[i+j]) {
- *p = mode_chars[3 + (k & 2) + ((i&8) >> 3)];
- }
- i += 4;
- } while (i < 12);
- /* Note: We don't bother with nul termination because bss initialization
- * should have taken care of that for us. If the user scribbled in buf
- * memory, they deserve whatever happens. But we'll at least assert. */
- assert(buf[10] == 0);
- return buf;
- }
- #else
- /* 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* FAST_FUNC bb_mode_string(mode_t mode)
- {
- static char buf[12];
- char *p = buf;
- int i, j, k, m;
- *p = type_chars[ (mode >> 12) & 0xf ];
- i = 0;
- m = 0400;
- do {
- j = k = 0;
- do {
- *++p = '-';
- if (mode & m) {
- *p = mode_chars[j];
- k = j;
- }
- m >>= 1;
- } while (++j < 3);
- ++i;
- if (mode & (010000 >> i)) {
- *p = mode_chars[3 + (k & 2) + (i == 3)];
- }
- } while (i < 3);
- /* Note: We don't bother with nul termination because bss initialization
- * should have taken care of that for us. If the user scribbled in buf
- * memory, they deserve whatever happens. But we'll at least assert. */
- assert(buf[10] == 0);
- return buf;
- }
- #endif
|