projects / thirdparty / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 83d290c5 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 518e2e1a WD |
2 | /* |
| 3 | * mode_string implementation for busybox | |
| 4 | * | |
| 5 | * Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org> | |
| 518e2e1a WD |
6 | */ |
| 7 | ||
| 8 | /* Aug 13, 2003 | |
| 9 | * Fix a bug reported by junkio@cox.net involving the mode_chars index. | |
| 10 | */ | |
| 11 | ||
| 12 | ||
| 13 | #include <common.h> | |
| 518e2e1a WD |
14 | #include <linux/stat.h> |
| 15 | ||
| 16 | #if ( S_ISUID != 04000 ) || ( S_ISGID != 02000 ) || ( S_ISVTX != 01000 ) \ | |
| 17 | || ( S_IRUSR != 00400 ) || ( S_IWUSR != 00200 ) || ( S_IXUSR != 00100 ) \ | |
| 18 | || ( S_IRGRP != 00040 ) || ( S_IWGRP != 00020 ) || ( S_IXGRP != 00010 ) \ | |
| 19 | || ( S_IROTH != 00004 ) || ( S_IWOTH != 00002 ) || ( S_IXOTH != 00001 ) | |
| 20 | #error permission bitflag value assumption(s) violated! | |
| 21 | #endif | |
| 22 | ||
| 23 | #if ( S_IFSOCK!= 0140000 ) || ( S_IFLNK != 0120000 ) \ | |
| 24 | || ( S_IFREG != 0100000 ) || ( S_IFBLK != 0060000 ) \ | |
| 25 | || ( S_IFDIR != 0040000 ) || ( S_IFCHR != 0020000 ) \ | |
| 26 | || ( S_IFIFO != 0010000 ) | |
| 27 | #warning mode type bitflag value assumption(s) violated! falling back to larger version | |
| 28 | ||
| 29 | #if (S_IRWXU | S_IRWXG | S_IRWXO | S_ISUID | S_ISGID | S_ISVTX) == 07777 | |
| 30 | #undef mode_t | |
| 31 | #define mode_t unsigned short | |
| 32 | #endif | |
| 33 | ||
| 34 | static const mode_t mode_flags[] = { | |
| 35 | S_IRUSR, S_IWUSR, S_IXUSR, S_ISUID, | |
| 36 | S_IRGRP, S_IWGRP, S_IXGRP, S_ISGID, | |
| 37 | S_IROTH, S_IWOTH, S_IXOTH, S_ISVTX | |
| 38 | }; | |
| 39 | ||
| 40 | /* The static const char arrays below are duplicated for the two cases | |
| 41 | * because moving them ahead of the mode_flags declaration cause a text | |
| 42 | * size increase with the gcc version I'm using. */ | |
| 43 | ||
| 44 | /* The previous version used "0pcCd?bB-?l?s???". However, the '0', 'C', | |
| 45 | * and 'B' types don't appear to be available on linux. So I removed them. */ | |
| 46 | static const char type_chars[16] = "?pc?d?b?-?l?s???"; | |
| 47 | /* 0123456789abcdef */ | |
| 48 | static const char mode_chars[7] = "rwxSTst"; | |
| 49 | ||
| 50 | const char *bb_mode_string(int mode) | |
| 51 | { | |
| 52 | static char buf[12]; | |
| 53 | char *p = buf; | |
| 54 | ||
| 55 | int i, j, k; | |
| 56 | ||
| 57 | *p = type_chars[ (mode >> 12) & 0xf ]; | |
| 58 | i = 0; | |
| 59 | do { | |
| 60 | j = k = 0; | |
| 61 | do { | |
| 62 | *++p = '-'; | |
| 63 | if (mode & mode_flags[i+j]) { | |
| 64 | *p = mode_chars[j]; | |
| 65 | k = j; | |
| 66 | } | |
| 67 | } while (++j < 3); | |
| 68 | if (mode & mode_flags[i+j]) { | |
| 69 | *p = mode_chars[3 + (k & 2) + ((i&8) >> 3)]; | |
| 70 | } | |
| 71 | i += 4; | |
| 72 | } while (i < 12); | |
| 73 | ||
| 74 | /* Note: We don't bother with nul termination because bss initialization | |
| 75 | * should have taken care of that for us. If the user scribbled in buf | |
| 76 | * memory, they deserve whatever happens. But we'll at least assert. */ | |
| 77 | if (buf[10] != 0) return NULL; | |
| 78 | ||
| 79 | return buf; | |
| 80 | } | |
| 81 | ||
| 82 | #else | |
| 83 | ||
| 84 | /* The previous version used "0pcCd?bB-?l?s???". However, the '0', 'C', | |
| 85 | * and 'B' types don't appear to be available on linux. So I removed them. */ | |
| 518e2e1a WD |
86 | static const char type_chars[16] = "?pc?d?b?-?l?s???"; |
| 87 | /* 0123456789abcdef */ | |
| 88 | static const char mode_chars[7] = "rwxSTst"; | |
| 89 | ||
| 90 | const char *bb_mode_string(int mode) | |
| 91 | { | |
| 92 | static char buf[12]; | |
| 93 | char *p = buf; | |
| 94 | ||
| 95 | int i, j, k, m; | |
| 96 | ||
| 97 | *p = type_chars[ (mode >> 12) & 0xf ]; | |
| 98 | i = 0; | |
| 99 | m = 0400; | |
| 100 | do { | |
| 101 | j = k = 0; | |
| 102 | do { | |
| 103 | *++p = '-'; | |
| 104 | if (mode & m) { | |
| 105 | *p = mode_chars[j]; | |
| 106 | k = j; | |
| 107 | } | |
| 108 | m >>= 1; | |
| 109 | } while (++j < 3); | |
| 110 | ++i; | |
| 111 | if (mode & (010000 >> i)) { | |
| 112 | *p = mode_chars[3 + (k & 2) + (i == 3)]; | |
| 113 | } | |
| 114 | } while (i < 3); | |
| 115 | ||
| 116 | /* Note: We don't bother with nul termination because bss initialization | |
| 117 | * should have taken care of that for us. If the user scribbled in buf | |
| 118 | * memory, they deserve whatever happens. But we'll at least assert. */ | |
| 119 | if (buf[10] != 0) return NULL; | |
| 120 | ||
| 121 | return buf; | |
| 122 | } | |
| 123 | ||
| 124 | #endif |