d3633b7e9
Pascal Bellard
2014-06-30
Subject
fatattr: new applet
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util-linux/fatattr.c+104 -0
| @@ -0,0 +1,104 @@ | |
| + | /* vi: set sw=4 ts=4: */ |
| + | /* |
| + | * Display or change file attributes on a fat file system |
| + | * |
| + | * Copyright 2005 H. Peter Anvin |
| + | * Busybox'ed (2014) by Pascal Bellard <[email protected]> |
| + | * |
| + | * This file can be redistributed under the terms of the GNU General |
| + | * Public License |
| + | */ |
| + | //config:config FATATTR |
| + | //config: bool "fatattr" |
| + | //config: default y |
| + | //config: select PLATFORM_LINUX |
| + | //config: help |
| + | //config: fatattr lists or changes the file attributes on a fat file system. |
| + | |
| + | //applet:IF_FATATTR(APPLET(fatattr, BB_DIR_BIN, BB_SUID_DROP)) |
| + | //kbuild:lib-$(CONFIG_FATATTR) += fatattr.o |
| + | |
| + | //usage:#define fatattr_trivial_usage |
| + | //usage: "[-+rhsvda] FILE..." |
| + | //usage:#define fatattr_full_usage "\n\n" |
| + | //usage: "Change file attributes on FAT filesystem\n" |
| + | //usage: "\n - Clear attributes" |
| + | //usage: "\n + Set attributes" |
| + | //usage: "\n r Read only" |
| + | //usage: "\n h Hidden" |
| + | //usage: "\n s System" |
| + | //usage: "\n v Volume label" |
| + | //usage: "\n d Directory" |
| + | //usage: "\n a Archive" |
| + | |
| + | #include "libbb.h" |
| + | /* linux/msdos_fs.h says: */ |
| + | #ifndef FAT_IOCTL_GET_ATTRIBUTES |
| + | # define FAT_IOCTL_GET_ATTRIBUTES _IOR('r', 0x10, __u32) |
| + | # define FAT_IOCTL_SET_ATTRIBUTES _IOW('r', 0x11, __u32) |
| + | #endif |
| + | |
| + | /* Currently supports only the FAT flags, not the NTFS ones. |
| + | * Extra space at the end is a hack to print space separator in file listing. |
| + | * Let's hope no one ever passes space as an option char :) |
| + | */ |
| + | static const char bit_to_char[] = "rhsvda67 "; |
| + | |
| + | static inline unsigned long get_flag(char c) |
| + | { |
| + | const char *fp = strchr(bit_to_char, c); |
| + | if (!fp) |
| + | bb_error_msg_and_die("invalid character '%c'", c); |
| + | return 1 << (fp - bit_to_char); |
| + | } |
| + | |
| + | static unsigned decode_arg(const char *arg) |
| + | { |
| + | unsigned fl = 0; |
| + | while (*++arg) |
| + | fl |= get_flag(*arg); |
| + | return fl; |
| + | } |
| + | |
| + | int fatattr_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| + | int fatattr_main(int argc UNUSED_PARAM, char **argv) |
| + | { |
| + | unsigned set_mask = 0; |
| + | unsigned clear_mask = 0; |
| + | |
| + | for (;;) { |
| + | unsigned fl; |
| + | char *arg = *++argv; |
| + | |
| + | if (!arg) |
| + | bb_show_usage(); |
| + | if (arg[0] != '-' && arg[0] != '+') |
| + | break; |
| + | fl = decode_arg(arg); |
| + | if (arg[0] == '+') |
| + | set_mask |= fl; |
| + | else |
| + | clear_mask |= fl; |
| + | } |
| + | |
| + | do { |
| + | int fd, i; |
| + | uint32_t attr; |
| + | |
| + | fd = xopen(*argv, O_RDONLY); |
| + | xioctl(fd, FAT_IOCTL_GET_ATTRIBUTES, &attr); |
| + | attr = (attr | set_mask) & ~clear_mask; |
| + | if (set_mask | clear_mask) |
| + | xioctl(fd, FAT_IOCTL_SET_ATTRIBUTES, &attr); |
| + | else { |
| + | for (i = 0; bit_to_char[i]; i++) { |
| + | bb_putchar((attr & 1) ? bit_to_char[i] : ' '); |
| + | attr >>= 1; |
| + | } |
| + | puts(*argv); |
| + | } |
| + | close(fd); |
| + | } while (*++argv); |
| + | |
| + | return EXIT_SUCCESS; |
| + | } |