blob: 030978f64b236789438d09531800e00a5bf6f49c
| 1 | /* vi: set sw=4 ts=4: */ |
| 2 | /* |
| 3 | * Display or change file attributes on a fat file system |
| 4 | * |
| 5 | * Copyright 2005 H. Peter Anvin |
| 6 | * Busybox'ed (2014) by Pascal Bellard <pascal.bellard@ads-lu.com> |
| 7 | * |
| 8 | * This file can be redistributed under the terms of the GNU General |
| 9 | * Public License |
| 10 | */ |
| 11 | //config:config FATATTR |
| 12 | //config: bool "fatattr" |
| 13 | //config: default y |
| 14 | //config: select PLATFORM_LINUX |
| 15 | //config: help |
| 16 | //config: fatattr lists or changes the file attributes on a fat file system. |
| 17 | |
| 18 | //applet:IF_FATATTR(APPLET(fatattr, BB_DIR_BIN, BB_SUID_DROP)) |
| 19 | |
| 20 | //kbuild:lib-$(CONFIG_FATATTR) += fatattr.o |
| 21 | |
| 22 | //usage:#define fatattr_trivial_usage |
| 23 | //usage: "[-+rhsvda] FILE..." |
| 24 | //usage:#define fatattr_full_usage "\n\n" |
| 25 | //usage: "Change file attributes on FAT filesystem\n" |
| 26 | //usage: "\n - Clear attributes" |
| 27 | //usage: "\n + Set attributes" |
| 28 | //usage: "\n r Read only" |
| 29 | //usage: "\n h Hidden" |
| 30 | //usage: "\n s System" |
| 31 | //usage: "\n v Volume label" |
| 32 | //usage: "\n d Directory" |
| 33 | //usage: "\n a Archive" |
| 34 | |
| 35 | #include "libbb.h" |
| 36 | /* linux/msdos_fs.h says: */ |
| 37 | #ifndef FAT_IOCTL_GET_ATTRIBUTES |
| 38 | # define FAT_IOCTL_GET_ATTRIBUTES _IOR('r', 0x10, uint32_t) |
| 39 | # define FAT_IOCTL_SET_ATTRIBUTES _IOW('r', 0x11, uint32_t) |
| 40 | #endif |
| 41 | |
| 42 | /* Currently supports only the FAT flags, not the NTFS ones. |
| 43 | * Extra space at the end is a hack to print space separator in file listing. |
| 44 | * Let's hope no one ever passes space as an option char :) |
| 45 | */ |
| 46 | static const char bit_to_char[] ALIGN1 = "rhsvda67 "; |
| 47 | |
| 48 | static inline unsigned long get_flag(char c) |
| 49 | { |
| 50 | const char *fp = strchr(bit_to_char, c); |
| 51 | if (!fp) |
| 52 | bb_error_msg_and_die("invalid character '%c'", c); |
| 53 | return 1 << (fp - bit_to_char); |
| 54 | } |
| 55 | |
| 56 | static unsigned decode_arg(const char *arg) |
| 57 | { |
| 58 | unsigned fl = 0; |
| 59 | while (*++arg) |
| 60 | fl |= get_flag(*arg); |
| 61 | return fl; |
| 62 | } |
| 63 | |
| 64 | int fatattr_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| 65 | int fatattr_main(int argc UNUSED_PARAM, char **argv) |
| 66 | { |
| 67 | unsigned set_mask = 0; |
| 68 | unsigned clear_mask = 0; |
| 69 | |
| 70 | for (;;) { |
| 71 | unsigned fl; |
| 72 | char *arg = *++argv; |
| 73 | |
| 74 | if (!arg) |
| 75 | bb_show_usage(); |
| 76 | if (arg[0] != '-' && arg[0] != '+') |
| 77 | break; |
| 78 | fl = decode_arg(arg); |
| 79 | if (arg[0] == '+') |
| 80 | set_mask |= fl; |
| 81 | else |
| 82 | clear_mask |= fl; |
| 83 | } |
| 84 | |
| 85 | do { |
| 86 | int fd, i; |
| 87 | uint32_t attr; |
| 88 | |
| 89 | fd = xopen(*argv, O_RDONLY); |
| 90 | xioctl(fd, FAT_IOCTL_GET_ATTRIBUTES, &attr); |
| 91 | attr = (attr | set_mask) & ~clear_mask; |
| 92 | if (set_mask | clear_mask) |
| 93 | xioctl(fd, FAT_IOCTL_SET_ATTRIBUTES, &attr); |
| 94 | else { |
| 95 | for (i = 0; bit_to_char[i]; i++) { |
| 96 | bb_putchar((attr & 1) ? bit_to_char[i] : ' '); |
| 97 | attr >>= 1; |
| 98 | } |
| 99 | puts(*argv); |
| 100 | } |
| 101 | close(fd); |
| 102 | } while (*++argv); |
| 103 | |
| 104 | return EXIT_SUCCESS; |
| 105 | } |
| 106 |