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#include "libbb.h"
36
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
43
44
45
46static const char bit_to_char[] ALIGN1 = "rhsvda67 ";
47
48static 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
56static unsigned decode_arg(const char *arg)
57{
58 unsigned fl = 0;
59 while (*++arg)
60 fl |= get_flag(*arg);
61 return fl;
62}
63
64int fatattr_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
65int 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