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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 | // SPDX-License-Identifier: GPL-2.0+ /* * mode_string implementation for busybox * * Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org> */ /* Aug 13, 2003 * Fix a bug reported by junkio@cox.net involving the mode_chars index. */ #include <common.h> #include <linux/stat.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 { 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. */ if (buf[10] != 0) return NULL; 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(int 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. */ if (buf[10] != 0) return NULL; return buf; } #endif |