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authorBrad Conroy <bconroy@uis.edu>2013-10-07 14:12:35 -0500
committerBrad Conroy <bconroy@uis.edu>2013-10-07 14:12:35 -0500
commit730d5a851fd8d8d39497e1dbb334baa583816c61 (patch)
tree00ef16e65f1c50282e31cd928faff0a89aa8bb60 /toys
parent04051858fca12d1157155f0273e0f65458a51909 (diff)
downloadtoybox-730d5a851fd8d8d39497e1dbb334baa583816c61.tar.gz
Add blkid.c
I finally figured out the NTFS labels after reading a rant on how UTF-8 rocks and how MS switched to UTF16 or UCS1 or whatever. The reason I couldn't grep for the label (mine was "myntfs") was that it is stored as "m\0y\0n\0t\0f\0s\0\0" - found another good use for hexdump :) Notes: I only have x86 to test on, so there are a couple of places that may need bswap_{16,32} for endianness. I used a 65k buf instead of toybuf (4k) for simplicity, but tried to organize it for toybuf if wanted. I have info on more fs types, to patch with after review. blkid does output for all devices if 0 args -> read /proc/partitions?
Diffstat (limited to 'toys')
-rw-r--r--toys/pending/blkid.c240
1 files changed, 240 insertions, 0 deletions
diff --git a/toys/pending/blkid.c b/toys/pending/blkid.c
new file mode 100644
index 00000000..b413047b
--- /dev/null
+++ b/toys/pending/blkid.c
@@ -0,0 +1,240 @@
+/* blkid.c - Prints type, label and UUID of filesystem(s).
+ *
+ * Copyright 2013 Brad Conroy <bconroy@uis.edu>
+ *
+ * See ftp://ftp.kernel.org/pub/linux/utils/util-linux/v2.24/libblkid-docs/api-index-full.html
+
+USE_BLKID(NEWTOY(blkid, NULL, TOYFLAG_BIN))
+
+config BLKID
+ bool "blkid"
+ default n
+ help
+ usage: blkid [block device...]
+ Prints type, label and UUID of filesystem.
+
+*/
+#define FOR_blkid
+#include "toys.h"
+
+#define BIT(x) (1<<(x))
+#define _MATCH(buf,type,offset,match) (((unsigned type *)&buf[offset])[0]==(match))
+#define MATCH2(b,a) (_MATCH(b,a##_TYPE,a##_OFFSET,a##_MAGIC2)||MATCH(b,a))
+#define MATCH3(b,a) (_MATCH(b,a##_TYPE,a##_OFFSET,a##_MAGIC3)||MATCH2(b,a))
+#define MATCH(b,a) _MATCH(b,a##_TYPE,a##_OFFSET,a##_MAGIC)
+/* may need to check endianess for C2I */
+#define C2I(a,b,c,d) (a|(b<<8)|(c<<16)|(d<<24))
+
+typedef struct fs_info{
+ unsigned uuid_off;
+ unsigned lab_off;
+ short uuid_t;
+ short lab_len;
+}fs_info_t;
+
+//#define SET_FS(t) (fs_info_t){t##_UUID,t##_LABEL,t##_UUID_T,t##_LABEL_SZ}
+#define SET_FS(t) (fs_info_t)t##_INFO
+
+#define ADFS_MAGIC 0xadf5
+#define ADFS_TYPE short
+#define ADFS_OFFSET 0xc00
+#define ADFS_INFO {0,0,0,0} /*todo*/
+
+#define BFS_MAGIC 0x1badface
+#define BFS_TYPE long
+#define BFS_OFFSET 0
+#define BFS_INFO {0,0,0,0}
+
+/*won't fit in 1 toybuf*/
+#define BTRFS_MAGIC C2I('_','B','H','R') //'RHB_'
+//#define BTRFS_MAGIC2 'M_Sf' /*not currently used*/
+//#define BTRFS_OFFSET2 65604 /*not currently used*/
+#define BTRFS_TYPE long /*change to long long if full magic used?*/
+#define BTRFS_OFFSET 65600
+#define BTRFS_INFO {65803,65819,16,256}
+
+#define CRAMFS_MAGIC 0x28cd3d45
+#define CRAMFS_MAGIC2 0x453dcd28
+#define CRAMFS_TYPE long
+#define CRAMFS_OFFSET 0
+#define CRAMFS_INFO {0,48,0,16}
+
+#define EXT_MAGIC 0xEF53
+#define EXT_MAGIC2 0xEF51
+#define EXT_MAGIC3 0x53EF
+#define EXT_TYPE short
+#define EXT_OFFSET 1080
+#define EXT3_BYTE 1116
+#define EXT4_BYTE 1120
+#define EXT_INFO {1128,1144,16,16}
+
+#define F2FS_MAGIC 0xF2F52010
+#define F2FS_TYPE long
+#define F2FS_OFFSET 1024
+#define F2FS_INFO {1132,1110,16,16}
+
+/*won't fit in 1 toybuf*/
+#define JFS_MAGIC C2I('J','S','F','1') //'1SFJ'
+#define JFS_TYPE long
+#define JFS_OFFSET 32768
+#define JFS_INFO {32920,32904,16,16}
+
+#define NILFS_MAGIC 0x3434
+#define NILFS_TYPE short
+#define NILFS_OFFSET 1030
+#define NILFS_INFO {1176,1192,16,80}
+
+#define NTFS_MAGIC C2I('N','T','F','S') //'SFTN'
+#define NTFS_TYPE long
+#define NTFS_OFFSET 3
+#define NTFS_INFO {0x48,0X4D80,8,-8}
+
+/*won't fit in 1 toybuf*/
+#define REISER_MAGIC C2I('R','e','I','s') //'sIeR'
+#define REISER_TYPE long
+#define REISER_OFFSET 8244
+#define REISER_INFO {8276,8292,16,16}
+
+#define REISERB_MAGIC REISER_MAGIC //'sIeR'
+#define REISERB_TYPE REISER_TYPE
+#define REISERB_OFFSET 65588
+#define REISERB_INFO {65620,65636,16,16}
+
+#define ROMFS_MAGIC C2I('r','o','m','-') //'-mor'
+#define ROMFS_OFFSET 0
+#define ROMFS_TYPE long
+#define ROMFS_INFO {0,0,0,0}
+
+#define SQUASHFS_OFFSET 0
+#define SQUASHFS_TYPE long
+#define SQUASHFS_MAGIC 0x73717368
+#define SQUASHFS_INFO {0,0,0,0}
+
+#define XIAFS_OFFSET 572
+#define XIAFS_TYPE long
+#define XIAFS_MAGIC 0x012FD16D
+#define XIAFS_INFO {0,0,0,0}
+
+#define XFS_OFFSET 0
+#define XFS_TYPE long
+#define XFS_MAGIC C2I('X','F','S','B')
+#define XFS_INFO {32,108,16,12}
+
+#if (CFG_BLKID)
+char *toutf8(unsigned short * ws){ /* hack for NTFS utf16 */
+ static char buf[16];
+ int i=0;
+ while((buf[i++]=*ws++));
+ return buf;
+}
+#endif
+
+/* TODO if no args use proc/partitions */
+void do_blkid(int fd, char *name){
+ fs_info_t fs;
+ char *fstype;
+ unsigned char buf[66560]; /*toybuf is only 4096, could rework logic*/
+ int sb_read;
+
+ sb_read = read(fd, &buf, sizeof(buf));
+ if (sb_read < 1) return;
+
+ if MATCH(buf,ADFS){
+ fstype="adfs";
+ if (CFG_BLKID) fs=SET_FS(ADFS);
+ }else if MATCH(buf,BFS){
+ fstype="bfs";
+ if (CFG_BLKID) fs=SET_FS(BFS);
+ }else if MATCH(buf,CRAMFS){
+ fstype="cramfs";
+ if (CFG_BLKID) fs=SET_FS(CRAMFS);
+ }else if MATCH3(buf,EXT){
+ fstype=(buf[EXT3_BYTE]&BIT(2))?((buf[EXT4_BYTE]&BIT(6))?"ext4":"ext3"):"ext2";
+ if (CFG_BLKID) fs=SET_FS(EXT);
+ }else if MATCH(buf,F2FS){
+ fstype="f2fs";
+ if (CFG_BLKID) fs=SET_FS(F2FS);
+ }else if MATCH(buf,NILFS){
+ fstype="nilfs";
+ if (CFG_BLKID) fs=SET_FS(NILFS);
+ }else if MATCH(buf,NTFS){
+ fstype="ntfs";
+ if (CFG_BLKID) fs=SET_FS(NTFS);
+ }else if MATCH(buf,XIAFS){
+ fstype="xiafs";
+ if (CFG_BLKID) fs=SET_FS(XIAFS);
+/*below here would require more than 1 toybuf*/
+ }else if MATCH(buf,REISER){
+ fstype="reiserfs";
+ if (CFG_BLKID) fs=SET_FS(REISER);
+ }else if MATCH(buf,JFS){
+ fstype="jfs";
+ if (CFG_BLKID) fs=SET_FS(JFS);
+ }else if MATCH(buf,BTRFS){
+ fstype="btrfs";
+ if (CFG_BLKID) fs=SET_FS(BTRFS);
+ }else if MATCH(buf,REISERB){
+ fstype="reiserfs";
+ if (CFG_BLKID) fs=SET_FS(REISERB);
+ }else return;
+
+if (CFG_BLKID && !strncmp("blkid",toys.which->name,5) ){
+ printf("%s:",name);
+ if ( fs.lab_len > 0 )
+ printf(" LABEL=\"%.*s\"", fs.lab_len, (char *)&buf[fs.lab_off]);
+ else if ( fs.lab_len < 0 )
+ printf(" LABEL=\"%.*s\"", -fs.lab_len,
+ toutf8((unsigned short *)&buf[fs.lab_off]));
+ if ( fs.uuid_off > 0 ){
+ if ( fs.uuid_t == 16 )
+ printf(" UUID=\"%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-"
+ "%02x%02x%02x%02x%02x%02x\"",
+ buf[fs.uuid_off], buf[fs.uuid_off+1],
+ buf[fs.uuid_off+2], buf[fs.uuid_off+3],
+ buf[fs.uuid_off+4], buf[fs.uuid_off+5],
+ buf[fs.uuid_off+6], buf[fs.uuid_off+7],
+ buf[fs.uuid_off+8], buf[fs.uuid_off+9],
+ buf[fs.uuid_off+10], buf[fs.uuid_off+11],
+ buf[fs.uuid_off+12], buf[fs.uuid_off+13],
+ buf[fs.uuid_off+14], buf[fs.uuid_off+15]);
+ if ( fs.uuid_t == 8 )
+ printf(" UUID=\"%02X%02X%02X%02X%02X%02X%02X%02X\"",
+ buf[fs.uuid_off+7], buf[fs.uuid_off+6],
+ buf[fs.uuid_off+5], buf[fs.uuid_off+4],
+ buf[fs.uuid_off+3], buf[fs.uuid_off+2],
+ buf[fs.uuid_off+1], buf[fs.uuid_off]);
+ }
+ printf(" TYPE=\"%s\"",fstype);
+}else /* fstype */
+ write(1,fstype,strlen(fstype)); /* avoid printf overhead in fstype */
+ putchar('\n');
+}
+
+#if (CFG_BLKID)
+void blkid_main(void)
+{
+ loopfiles(toys.optargs, do_blkid);
+}
+#endif
+
+
+/* fstype.c - Prints type of filesystem(s).
+ *
+ * Copyright 2013 Brad Conroy <bconroy@uis.edu>
+
+USE_FSTYPE(NEWTOY(fstype, NULL, TOYFLAG_BIN))
+
+config FSTYPE
+ bool "fstype"
+ default n
+ help
+ usage: fstype [block device...]
+ Prints type of filesystem.
+*/
+#define FOR_fstype
+#include "toys.h"
+void do_blkid(int fd, char *name);
+void fstype_main(void)
+{
+ loopfiles(toys.optargs, do_blkid);
+}