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/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include <getopt.h>
#include <string.h>
#include "cgpt.h"
#include "vboot_host.h"
extern const char* progname;
static void Usage(void)
{
printf("\nUsage: %s find [OPTIONS] [DRIVE]\n\n"
"Find a partition by its UUID or label. With no specified DRIVE\n"
"it scans all physical drives.\n\n"
"Options:\n"
" -D NUM Size (in bytes) of the disk where partitions reside;\n"
" default 0, meaning partitions and GPT structs are\n"
" both on DRIVE\n"
" -t GUID Search for Partition Type GUID\n"
" -u GUID Search for Partition Unique ID\n"
" -l LABEL Search for Label\n"
" -v Be verbose in displaying matches (repeatable)\n"
" -n Numeric output only\n"
" -1 Fail if more than one match is found\n"
" -M FILE"
" Matching partition data must also contain FILE content\n"
" -O NUM"
" Byte offset into partition to match content (default 0)\n"
"\n", progname);
PrintTypes();
}
// read a file into a buffer, return buffer and update size
static uint8_t *ReadFile(const char *filename, uint64_t *size) {
FILE *f;
uint8_t *buf;
long pos;
f = fopen(filename, "rb");
if (!f) {
return NULL;
}
fseek(f, 0, SEEK_END);
pos = ftell(f);
if (pos < 0) {
fclose(f);
return NULL;
}
*size = pos;
rewind(f);
buf = malloc(*size);
if (!buf) {
fclose(f);
return NULL;
}
if(1 != fread(buf, *size, 1, f)) {
fclose(f);
free(buf);
return NULL;
}
fclose(f);
return buf;
}
int cmd_find(int argc, char *argv[]) {
CgptFindParams params;
memset(¶ms, 0, sizeof(params));
int i;
int errorcnt = 0;
char *e = 0;
int c;
opterr = 0; // quiet, you
while ((c=getopt(argc, argv, ":hv1nt:u:l:M:O:D:")) != -1)
{
switch (c)
{
case 'D':
params.drive_size = strtoull(optarg, &e, 0);
errorcnt += check_int_parse(c, e);
break;
case 'v':
params.verbose++;
break;
case 'n':
params.numeric = 1;
break;
case '1':
params.oneonly = 1;
break;
case 'l':
params.set_label = 1;
params.label = optarg;
break;
case 't':
params.set_type = 1;
if (CGPT_OK != SupportedType(optarg, ¶ms.type_guid) &&
CGPT_OK != StrToGuid(optarg, ¶ms.type_guid)) {
Error("invalid argument to -%c: %s\n", c, optarg);
errorcnt++;
}
break;
case 'u':
params.set_unique = 1;
if (CGPT_OK != StrToGuid(optarg, ¶ms.unique_guid)) {
Error("invalid argument to -%c: %s\n", c, optarg);
errorcnt++;
}
break;
case 'M':
params.matchbuf = ReadFile(optarg, ¶ms.matchlen);
if (!params.matchbuf || !params.matchlen) {
Error("Unable to read from %s\n", optarg);
errorcnt++;
}
// Go ahead and allocate space for the comparison too
params.comparebuf = (uint8_t *)malloc(params.matchlen);
if (!params.comparebuf) {
Error("Unable to allocate %" PRIu64 "bytes for comparison buffer\n",
params.matchlen);
errorcnt++;
}
break;
case 'O':
params.matchoffset = strtoull(optarg, &e, 0);
errorcnt += check_int_parse(c, e);
break;
case 'h':
Usage();
return CGPT_OK;
case '?':
Error("unrecognized option: -%c\n", optopt);
errorcnt++;
break;
case ':':
Error("missing argument to -%c\n", optopt);
errorcnt++;
break;
default:
errorcnt++;
break;
}
}
if (!params.set_unique && !params.set_type && !params.set_label) {
Error("You must specify at least one of -t, -u, or -l\n");
errorcnt++;
}
if (errorcnt)
{
Usage();
return CGPT_FAILED;
}
if (optind < argc) {
for (i=optind; i<argc; i++) {
params.drive_name = argv[i];
CgptFind(¶ms);
}
} else {
CgptFind(¶ms);
}
if (params.oneonly && params.hits != 1) {
return CGPT_FAILED;
}
if (params.match_partnum) {
return CGPT_OK;
}
return CGPT_FAILED;
}
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