From b013532b3061cc661ee9d0b141efbc86cda5c320 Mon Sep 17 00:00:00 2001 From: root Date: Sat, 8 Sep 2007 18:21:23 +0000 Subject: *** empty log message *** --- src/Makefile.am | 7 +++- src/crc.c | 77 +++++++++++++++++++++++++++++++++++ src/gpt.c | 34 +++++++++++++++- src/gpt.h | 33 +++++++-------- src/guid.c | 122 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ src/guid.h | 40 ++++++++++++++++++ src/header.c | 36 ++++++++++++++++ src/project.h | 13 +++++- src/prototypes.h | 14 +++++++ src/util.c | 55 +++++++++++++++++++++++++ 10 files changed, 409 insertions(+), 22 deletions(-) create mode 100644 src/crc.c create mode 100644 src/guid.c create mode 100644 src/guid.h create mode 100644 src/header.c create mode 100644 src/util.c diff --git a/src/Makefile.am b/src/Makefile.am index 6b4b5e4..79e36c2 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -5,9 +5,12 @@ # Copyright (c) 2007 James McKenzie , # All rights reserved. # -# $Id: Makefile.am,v 1.1 2007/09/08 16:49:37 root Exp $ +# $Id: Makefile.am,v 1.2 2007/09/08 18:21:23 root Exp $ # # $Log: Makefile.am,v $ +# Revision 1.2 2007/09/08 18:21:23 root +# *** empty log message *** +# # Revision 1.1 2007/09/08 16:49:37 root # *** empty log message *** # @@ -22,7 +25,7 @@ noinst_HEADERS=project.h prototypes.h bin_PROGRAMS = gpt -SRCS=gpt.c version.c +SRCS=gpt.c version.c util.c guid.c crc.c header.c gpt_SOURCES = ${SRCS} gpt_LDADD = diff --git a/src/crc.c b/src/crc.c new file mode 100644 index 0000000..de1a085 --- /dev/null +++ b/src/crc.c @@ -0,0 +1,77 @@ +#include "project.h" + +static const uint32_t crc_table[256] = { + 0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L, + 0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L, + 0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L, + 0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL, + 0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L, + 0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L, + 0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L, + 0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL, + 0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L, + 0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL, + 0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L, + 0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L, + 0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L, + 0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL, + 0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL, + 0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L, + 0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL, + 0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L, + 0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L, + 0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L, + 0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL, + 0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L, + 0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L, + 0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL, + 0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L, + 0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L, + 0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L, + 0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L, + 0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L, + 0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL, + 0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL, + 0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L, + 0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L, + 0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL, + 0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL, + 0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L, + 0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL, + 0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L, + 0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL, + 0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L, + 0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL, + 0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L, + 0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L, + 0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL, + 0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L, + 0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L, + 0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L, + 0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L, + 0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L, + 0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L, + 0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL, + 0x2d02ef8dL +}; + +#define DO1(buf) crc = crc_table[((int)crc ^ (*buf++)) & 0xff] ^ (crc >> 8); +#define DO2(buf) DO1(buf); DO1(buf); +#define DO4(buf) DO2(buf); DO2(buf); +#define DO8(buf) DO4(buf); DO4(buf); + +uint32_t crc32(uint32_t crc, const uint8_t *buf, int len) +{ + if (!buf) return 0; + + crc = crc ^ 0xffffffffL; + while (len >= 8) + { + DO8(buf); + len -= 8; + } + if (len) do { + DO1(buf); + } while (--len); + return crc ^ 0xffffffffL; +} diff --git a/src/gpt.c b/src/gpt.c index f392710..c0f4bf5 100644 --- a/src/gpt.c +++ b/src/gpt.c @@ -6,10 +6,13 @@ * */ -static char rcsid[] = "$Id: gpt.c,v 1.1 2007/09/08 16:49:37 root Exp $"; +static char rcsid[] = "$Id: gpt.c,v 1.2 2007/09/08 18:21:23 root Exp $"; /* * $Log: gpt.c,v $ + * Revision 1.2 2007/09/08 18:21:23 root + * *** empty log message *** + * * Revision 1.1 2007/09/08 16:49:37 root * *** empty log message *** * @@ -23,5 +26,34 @@ static char rcsid[] = "$Id: gpt.c,v 1.1 2007/09/08 16:49:37 root Exp $"; int main (int argc, char *argv[]) { +int fd; +char buf[512]; +GPT_entry *e; +GPT_header *h; +int i,j; + +fd=open("/dev/sda",O_RDONLY); + + +read(fd,buf,512); +read(fd,buf,512); + +h=(GPT_header *) buf; + +header_print(h); + + + +for (i=0;i<2;++i) { +read(fd,buf,512); +//hexdump(stderr,buf,0,512); +for (j=0;j<4;++j) { +e=(GPT_entry *) buf; +e+=j; +printf("%d,%d: %s\n",i,j,guid_to_a(e->type)); +} +} + + return 0; } diff --git a/src/gpt.h b/src/gpt.h index 80742ea..5f1857c 100644 --- a/src/gpt.h +++ b/src/gpt.h @@ -1,15 +1,12 @@ -#define PACKED __attribute__((packed)) -#define TYPE_EMPTY "00000000-0000-0000-0000-000000000000" -#define TYPE_SYSTEM "C12A7328-F81F-11D2-BA4B-00A0C93EC93B" - -typedef PACKED struct -{ - uint8_t d[16]; -} GUID; +#define GUID_TYPE_EMPTY MAKE_GUID(0,0,0,0,0) +#define GUID_TYPE_SYSTEM MAKE_GUID(C12A7328,F81F,11D2,BA4B,00A0C93EC93B) +#define GUID_TYPE_LINUX_EXT3 MAKE_GUID(EBD0A0A2,B9E5,4433,87C0,68B6B72699C7) +#define GUID_TYPE_LINUX_SWAP MAKE_GUID(0657FD6D,A4AB,43C4,84E5,0933C84B4F4F) +#define GUID_TYPE_APPLE_HFS MAKE_GUID(48465300,0000,11AA,AA11,00306543ECAC) #define GPT_ENTRY_FLAG_SYSTEM 1 -typedef PACKED struct +typedef struct { GUID type; GUID label; @@ -17,12 +14,12 @@ typedef PACKED struct uint64_t end; uint64_t flags; uint8_t name[72]; -} GPT_entry; +} PACKED GPT_entry; #define GPT_HEADER_SIGNATURE "EFI PART" #define GPT_HEADER_REVISION_EFI10 0x00010000 -typedef PACKED struct +typedef struct { uint8_t signature[8]; uint32_t revision; @@ -38,7 +35,7 @@ typedef PACKED struct uint32_t n_partition_entries; uint32_t partition_entry_size; uint32_t partition_entry_crc; -} GPT_header; +} PACKED GPT_header; @@ -46,14 +43,14 @@ typedef PACKED struct #define MBR_PARTITION_TYPE_EFI 0xee #define MBR_PARTITION_BOOTABLE 0x80 -typedef PACKED struct +typedef struct { uint8_t head; uint8_t sector; uint8_t track; -} CHS; +} PACKED CHS; -typedef PACKED struct +typedef struct { uint8_t bootable; CHS chs_start; @@ -61,13 +58,13 @@ typedef PACKED struct CHS chs_end; uint32_t start; uint32_t size; -} MBR_entry; +} PACKED MBR_entry; -typedef PACKED struct +typedef struct { uint8_t boot_code[440]; uint8_t uid[4]; uint8_t reserved[2]; MBR_entry entry[4]; uint8_t signature[2]; -} MBR; +} PACKED MBR; diff --git a/src/guid.c b/src/guid.c new file mode 100644 index 0000000..d9d5dcb --- /dev/null +++ b/src/guid.c @@ -0,0 +1,122 @@ +#include "project.h" + + +static struct known_struct +{ + GUID g; + char *name; +} known_guids[] = +{ + { GUID_TYPE_EMPTY, "empty"}, + { GUID_TYPE_SYSTEM, "EFI SYSTEM"}, +{GUID_TYPE_LINUX_EXT3,"linux-ext3"}, +{GUID_TYPE_LINUX_SWAP,"linux-swap"}, +{GUID_TYPE_APPLE_HFS,"apple-hfs"}, + { {0}, NULL} +}; + + +int guid_cmp(GUID *a,GUID *b) +{ +return memcmp(a,b,sizeof(GUID)); +} + +#define GUIDTOARETSIZE 80 +char * +guid_to_a (GUID g) +{ + char *ret = malloc (GUIDTOARETSIZE); + struct known_struct *ptr = known_guids; + + snprintf (ret, GUIDTOARETSIZE, + "%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X", + g.d[3], g.d[2], g.d[1], g.d[0], g.d[5], g.d[4], g.d[7], g.d[6], + g.d[8], g.d[9], g.d[10], g.d[11], g.d[12], g.d[13], g.d[14], + g.d[15]); + + while (ptr->name) + { + if (!guid_cmp (&g, &ptr->g)) + { + strcat (ret, " ("); + strcat (ret, ptr->name); + strcat (ret, ")"); + } + ptr++; + } + + return ret; +} + +int +a_to_guid (char *a,GUID *g) +{ + struct known_struct *ptr = known_guids; + int digit[32],ndigits=0,i; + + while (ptr->name) + { + if (!strcmp (a, ptr->name)) + memcpy(g,&ptr->g,sizeof(GUID)); + return 0; + } + + while ((*a) && (ndigits!=32)) { + switch (*a) { + case ' ': + case '\t': + case '\n': + case '\r': + case '-': + break; + case '0': + case '1': + case '2': + case '3': + case '4': + case '5': + case '6': + case '7': + case '8': + case '9': + digit[ndigits++]=(*a)-'0'; + break; + case 'A': + case 'B': + case 'C': + case 'D': + case 'E': + case 'F': + digit[ndigits++]=((*a)-'A')+0xA; + break; + + case 'a': + case 'b': + case 'c': + case 'd': + case 'e': + case 'f': + digit[ndigits++]=((*a)-'a')+0xa; + break; + defalt: + return -1; + } + } + +for (i=0;i<16;++i) { + g->d[i]=(digit[(i<<1)] << 4) | digit[(i<<1)+1]; +} + + return 0; +} + + +GUID random_guid(void) +{ +GUID ret; + +int fd=open("/dev/random",O_RDONLY); +read(fd,&ret,sizeof(ret)); +close(fd); +return ret; +} diff --git a/src/guid.h b/src/guid.h new file mode 100644 index 0000000..f92607d --- /dev/null +++ b/src/guid.h @@ -0,0 +1,40 @@ + +#define GUID_16(a) \ + (((a) >> 8) & 0xff), \ + (((a)) & 0xff), + +#define GUID_48(a) \ + (((a) >> 40) & 0xff), \ + (((a) >> 32) & 0xff), \ + (((a) >> 24) & 0xff), \ + (((a) >> 16) & 0xff), \ + (((a) >> 8) & 0xff), \ + (((a)) & 0xff), + +#define GUID_FLIP_32(a) \ + (((a)) & 0xff), \ + (((a) >> 8) & 0xff), \ + (((a) >> 16) & 0xff), \ + (((a) >> 24) & 0xff), + +#define GUID_FLIP_16(a) \ + (((a)) & 0xff), \ + (((a) >> 8) & 0xff), + +#define MAKE_GUID(a,b,c,d,e) \ + {{ \ + GUID_FLIP_32(0x ## a) \ + GUID_FLIP_16(0x ## b) \ + GUID_FLIP_16(0x ## c) \ + GUID_16(0x ## d) \ + GUID_48(0x ## e ## ULL) \ + }} + +typedef struct +{ + uint8_t d[16]; +} PACKED GUID; + + + + diff --git a/src/header.c b/src/header.c new file mode 100644 index 0000000..d577837 --- /dev/null +++ b/src/header.c @@ -0,0 +1,36 @@ +#include "project.h" + +void header_print(uint8_t *buf) +{ +GPT_header *h=(GPT_header *) buf; + + +printf ("Signature %c%c%c%c%c%c%c%c\n", + h->signature[0], + h->signature[1], + h->signature[2], + h->signature[3], + h->signature[4], + h->signature[5], + h->signature[6], + h->signature[7]); + +printf("rev=0x%08x header_size=%d header_crc=0x%08x\n", + h->revision,h->header_size,h->header_crc); +printf("my_lba=%lld alternate_lba=%lld first_lba=%lld last_lba=%lld\n", + (long long) h->my_lba, (long long) h->alternate_lba, + (long long) h->first_usable_lba,(long long) h->last_usable_lba); + +printf("guid=%s\n",guid_to_a(h->disk_guid)); +printf("partition_entry_lba=%lld n_entries=%d ent_size=%d ents_crc=%08x\n", + (long long) h->partition_entry_lba, h->n_partition_entries, + h->partition_entry_size,h->partition_entry_crc); + +printf("%x\n",crc32(0,buf,92)); +h->header_crc=0; +printf("%x\n",crc32(0,buf,92)); +h->partition_entry_crc=0; +printf("%x\n",crc32(0,buf,92)); + +} + diff --git a/src/project.h b/src/project.h index 4a1063e..d3e7562 100644 --- a/src/project.h +++ b/src/project.h @@ -7,11 +7,14 @@ */ /* - * $Id: project.h,v 1.1 2007/09/08 16:49:37 root Exp $ + * $Id: project.h,v 1.2 2007/09/08 18:21:24 root Exp $ */ /* * $Log: project.h,v $ + * Revision 1.2 2007/09/08 18:21:24 root + * *** empty log message *** + * * Revision 1.1 2007/09/08 16:49:37 root * *** empty log message *** * @@ -60,6 +63,14 @@ #include #endif +#include +#include + +#define PACKED __attribute__((packed)) + +#include "guid.h" +#include "gpt.h" + #include "prototypes.h" #endif /* __PROJECT_H__ */ diff --git a/src/prototypes.h b/src/prototypes.h index e69de29..a3f15d4 100644 --- a/src/prototypes.h +++ b/src/prototypes.h @@ -0,0 +1,14 @@ +/* gpt.c */ +int main(int argc, char *argv[]); +/* version.c */ +/* util.c */ +void hexdump(FILE *f, uint8_t *data, int s, int l); +/* guid.c */ +int guid_cmp(GUID *a, GUID *b); +char *guid_to_a(GUID g); +int a_to_guid(char *a, GUID *g); +GUID random_guid(void); +/* crc.c */ +uint32_t crc32(uint32_t crc, const uint8_t *buf, int len); +/* header.c */ +void header_print(uint8_t *buf); diff --git a/src/util.c b/src/util.c new file mode 100644 index 0000000..32071fd --- /dev/null +++ b/src/util.c @@ -0,0 +1,55 @@ +#include "project.h" + +void +hexdump (FILE * f, uint8_t * data, int s, int l) +{ + int e = s + l - 1; + int b = s & ~15; + int a = (e | 15) + 1; + int i, j; + + for (i = b; i < a; i += 16) + { + fprintf (f, " %04x: ", i); + for (j = i; j < (i + 16); ++j) + { + if (j == (i + 8)) + fprintf (f, " "); + + if ((j >= s) && (j <= e)) + { + fprintf (f, "%02x ", data[j]); + } + else + { + fprintf (f, " "); + } + } + + for (j = i; j < (i + 16); ++j) + { + + if (j == (i + 8)) + fprintf (f, " "); + + + if ((j >= s) && (j <= e)) + { + uint8_t c = data[j]; + if ((c < ' ') || (c > 126)) + c = '.'; + fprintf (f, "%c", c); + } + else + { + fprintf (f, " "); + } + } + + + fprintf (f, "\n"); + } + +} + + -- cgit v1.2.3