Mercurial > hg > toybox
annotate toys/pending/blkid.c @ 1084:4f30bf230196 draft
Cleanup blkid
| author | Rob Landley <rob@landley.net> |
|---|---|
| date | Tue, 08 Oct 2013 12:25:02 -0500 |
| parents | 8f0a577dcdd3 |
| children |
| rev | line source |
|---|---|
| 1081 | 1 /* blkid.c - Prints type, label and UUID of filesystem(s). |
| 2 * | |
| 3 * Copyright 2013 Brad Conroy <bconroy@uis.edu> | |
| 4 * | |
| 5 * See ftp://ftp.kernel.org/pub/linux/utils/util-linux/v2.24/libblkid-docs/api-index-full.html | |
| 6 | |
|
1083
8f0a577dcdd3
blkid cleanup: more whitespace (including fixing a strange unindented if block), convert strange fstype inclusion to OLDTOY(), use "<1" arg so calling with no arguments doesn't hang, convert typedef to normal struct.
Rob Landley <rob@landley.net>
parents:
1082
diff
changeset
|
7 USE_BLKID(NEWTOY(blkid, "<1", TOYFLAG_BIN)) |
|
8f0a577dcdd3
blkid cleanup: more whitespace (including fixing a strange unindented if block), convert strange fstype inclusion to OLDTOY(), use "<1" arg so calling with no arguments doesn't hang, convert typedef to normal struct.
Rob Landley <rob@landley.net>
parents:
1082
diff
changeset
|
8 USE_BLKID(OLDTOY(fstype, blkid, "<1", TOYFLAG_BIN)) |
| 1081 | 9 |
| 10 config BLKID | |
| 11 bool "blkid" | |
| 12 default n | |
| 13 help | |
| 14 usage: blkid [block device...] | |
| 15 Prints type, label and UUID of filesystem. | |
|
1083
8f0a577dcdd3
blkid cleanup: more whitespace (including fixing a strange unindented if block), convert strange fstype inclusion to OLDTOY(), use "<1" arg so calling with no arguments doesn't hang, convert typedef to normal struct.
Rob Landley <rob@landley.net>
parents:
1082
diff
changeset
|
16 */ |
| 1081 | 17 |
| 18 #define FOR_blkid | |
| 19 #include "toys.h" | |
| 20 | |
| 1084 | 21 struct fstype { |
| 22 char *name; | |
| 23 uint64_t magic; | |
| 24 int magic_len, magic_offset, uuid_off, label_len, label_off; | |
|
1083
8f0a577dcdd3
blkid cleanup: more whitespace (including fixing a strange unindented if block), convert strange fstype inclusion to OLDTOY(), use "<1" arg so calling with no arguments doesn't hang, convert typedef to normal struct.
Rob Landley <rob@landley.net>
parents:
1082
diff
changeset
|
25 }; |
| 1081 | 26 |
| 1084 | 27 static const struct fstype fstypes[] = { |
| 28 // ext3 = buf[1116]&4 ext4 = buf[1120]&64 | |
| 29 {"ext2", 0xEF53, 2, 1080, 1128, 16, 1144}, | |
| 30 // label actually 8/16 0x4d80 but horrible: 16 bit wide characters via | |
| 31 // codepage, something called a uuid that's only 8 bytes long... | |
| 32 {"ntfs", 0x5346544e, 4, 3, 0x48+(8<<24), 0, 0}, | |
| 1081 | 33 |
| 1084 | 34 {"adfs", 0xadf5, 2, 0xc00, 0,0,0}, |
| 35 {"bfs", 0x1badface, 4, 0, 0,0,0}, | |
| 36 {"btrfs", 0x4D5F53665248425FULL, 8, 65600, 65803, 256, 65819}, | |
| 37 {"cramfs", 0x28cd3d45, 4, 0, 0, 16, 48}, | |
| 38 {"f2fs", 0xF2F52010, 4, 1024, 1132, 16, 1110}, | |
| 39 {"jfs", 0x3153464a, 4, 32768, 32920, 16, 32904}, | |
| 40 {"nilfs", 0x3434, 2, 1030, 1176, 80, 1192}, | |
| 41 {"murderfs", 0x724573496552, 6, 8244, 8276, 16, 8292}, | |
| 42 {"murderfs", 0x724573496552, 6, 65588, 65620, 16, 65536}, | |
| 43 {"romfs", 0x2d6d6f72, 4, 0, 0,0,0}, | |
| 44 {"squashfs", 0x73717368, 4, 0, 0,0,0}, | |
| 45 {"xiafs", 0x012fd16d, 4, 572, 0,0,0}, | |
| 46 {"xfs", 0x42534658, 4, 0, 32, 12, 108}, | |
| 47 {"vfat", 0x3233544146, 5, 82, 67+(4<<24), 11, 71}, // fat32 | |
| 48 {"vfat", 0x31544146, 4, 54, 39+(4<<24), 11, 43} // fat1 | |
| 49 }; | |
| 1081 | 50 |
| 51 /* TODO if no args use proc/partitions */ | |
|
1083
8f0a577dcdd3
blkid cleanup: more whitespace (including fixing a strange unindented if block), convert strange fstype inclusion to OLDTOY(), use "<1" arg so calling with no arguments doesn't hang, convert typedef to normal struct.
Rob Landley <rob@landley.net>
parents:
1082
diff
changeset
|
52 void do_blkid(int fd, char *name) |
|
8f0a577dcdd3
blkid cleanup: more whitespace (including fixing a strange unindented if block), convert strange fstype inclusion to OLDTOY(), use "<1" arg so calling with no arguments doesn't hang, convert typedef to normal struct.
Rob Landley <rob@landley.net>
parents:
1082
diff
changeset
|
53 { |
| 1084 | 54 int off, i, j; |
| 55 char *type; | |
| 56 | |
| 57 off = i = 0; | |
| 58 | |
| 59 for (;;) { | |
| 60 int pass = 0, len; | |
| 61 | |
| 62 // Read next block of data | |
| 63 len = readall(fd, toybuf, sizeof(toybuf)); | |
| 64 if (len != sizeof(toybuf)) return; | |
| 1081 | 65 |
| 1084 | 66 // Iterate through types in range |
| 67 for (i=0; i < sizeof(fstypes)/sizeof(struct fstype); i++) { | |
| 68 uint64_t test; | |
| 69 | |
| 70 // Skip tests not in this 4k block | |
| 71 if (fstypes[i].magic_offset > off+sizeof(toybuf)) { | |
| 72 pass++; | |
| 73 continue; | |
| 74 } | |
| 75 if (fstypes[i].magic_offset < off) continue; | |
| 76 | |
| 77 // Populate 64 bit little endian magic value | |
| 78 test = 0; | |
| 79 for (j = 0; j < fstypes[i].magic_len; j++) | |
| 80 test += ((uint64_t)toybuf[j+fstypes[i].magic_offset-off])<<(8*j); | |
| 81 if (test == fstypes[i].magic) break; | |
| 82 } | |
| 1081 | 83 |
| 1084 | 84 if (i == sizeof(fstypes)/sizeof(struct fstype)) { |
| 85 off += len; | |
| 86 if (pass) continue; | |
| 87 return; | |
| 88 } | |
| 89 break; | |
| 90 } | |
| 91 | |
| 92 // distinguish ext2/3/4 | |
| 93 type = fstypes[i].name; | |
| 94 if (!i) { | |
| 95 if (toybuf[1116]&4) type = "ext3"; | |
| 96 if (toybuf[1120]&64) type = "ext4"; | |
| 97 } | |
| 98 | |
| 99 // Could special case NTFS here... | |
| 1081 | 100 |
| 1084 | 101 // Output for fstype |
| 102 if (*toys.which->name == 'f') { | |
| 103 puts(type); | |
| 104 return; | |
| 105 } | |
| 106 | |
| 107 // output for blkid | |
| 108 printf("%s:",name); | |
| 109 | |
| 110 if (fstypes[i].label_len) | |
| 111 printf(" LABEL=\"%.*s\"", fstypes[i].label_len, | |
| 112 toybuf+fstypes[i].label_off-off); | |
|
1083
8f0a577dcdd3
blkid cleanup: more whitespace (including fixing a strange unindented if block), convert strange fstype inclusion to OLDTOY(), use "<1" arg so calling with no arguments doesn't hang, convert typedef to normal struct.
Rob Landley <rob@landley.net>
parents:
1082
diff
changeset
|
113 |
| 1084 | 114 if (fstypes[i].uuid_off) { |
| 115 int bits = 0x550, size = fstypes[i].uuid_off >> 24, | |
| 116 uoff = (fstypes[i].uuid_off & ((1<<24)-1))-off; | |
| 117 | |
| 118 if (size) bits = 4*(size == 4); | |
| 119 else size = 16; | |
| 120 | |
| 121 printf(" UUID=\""); | |
| 122 for (j = 0; j < size; j++) printf("-%02x"+!(bits & (1<<j)), toybuf[uoff+j]); | |
| 123 printf("\""); | |
| 124 } | |
| 125 | |
| 126 printf(" TYPE=\"%s\"\n", fstypes[i].name); | |
| 1081 | 127 } |
| 128 | |
| 129 void blkid_main(void) | |
| 130 { | |
| 131 loopfiles(toys.optargs, do_blkid); | |
| 132 } |