/* blkid.c - Prints type, label and UUID of filesystem(s). * * Copyright 2013 Brad Conroy * * See ftp://ftp.kernel.org/pub/linux/utils/util-linux/v2.24/libblkid-docs/api-index-full.html USE_BLKID(NEWTOY(blkid, "<1", TOYFLAG_BIN)) USE_BLKID(OLDTOY(fstype, blkid, "<1", 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)) struct fs_info { unsigned uuid_off; unsigned lab_off; short uuid_t; short lab_len; }; #define SET_FS(t) (struct fs_info)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} /* hack for NTFS utf16 */ char *toutf8(unsigned short *ws) { static char buf[16]; int i=0; while((buf[i++]=*ws++)); return buf; } /* TODO if no args use proc/partitions */ void do_blkid(int fd, char *name) { struct fs_info 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); /* avoid printf overhead in fstype */ } else write(1,fstype,strlen(fstype)); putchar('\n'); } void blkid_main(void) { loopfiles(toys.optargs, do_blkid); }