/* 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 *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 *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