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1 /* Copyright (c) 2010 The Chromium OS Authors. All rights reserved. | |
2 * Use of this source code is governed by a BSD-style license that can be | |
3 * found in the LICENSE file. | |
4 * | |
5 * Update GPT attribute bits. | |
6 */ | |
7 #include <getopt.h> | |
8 #include <stdio.h> | |
9 #include <stdlib.h> | |
10 #include "cgpt.h" | |
11 #include "cgptlib_internal.h" | |
12 #include "cgpt_tofix.h" | |
13 #include "utility.h" | |
14 | |
15 static struct number_range range_1_0 = {1, 0}; | |
16 static struct number_range range_15_0 = {15, 0}; | |
17 static struct number_range range_16_1 = {16, 1}; | |
18 | |
19 /* Integers to store parsed argument. */ | |
20 static int help, partition, successful, tries, priority; | |
21 | |
22 /* The structure for getopt_long(). When you add/delete any line, please refine | |
23 * attribute_comments[] and third parameter of getopt_long() too. */ | |
24 static struct option attribute_options[] = { | |
25 {.name = "help", .has_arg = no_argument, .flag = 0, .val = 'h'}, | |
26 {.name = "partition", .has_arg = required_argument, .flag = 0, .val = 'i'}, | |
27 {.name = "successful", .has_arg = required_argument, .flag = 0, .val = 's'}, | |
28 {.name = "tries", .has_arg = required_argument, .flag = 0, .val = 't'}, | |
29 {.name = "priority", .has_arg = required_argument, .flag = 0, .val = 'p'}, | |
30 { /* last element, which should be zero. */ } | |
31 }; | |
32 | |
33 /* Extra information than struct option, please update this structure if you | |
34 * add/remove any line in attribute_options[]. */ | |
35 static struct option_details attribute_options_details[] = { | |
36 /* help */ | |
37 { .comment = "print this help", | |
38 .validator = AssignTrue, | |
39 .valid_range = 0, | |
40 .parsed = &help}, | |
41 /* partition */ | |
42 { .comment = "partition number " | |
43 "(default: first ChromeOS kernel)", | |
44 .validator = InNumberRange, | |
45 .valid_range = &range_16_1, | |
46 .parsed = &partition}, | |
47 /* successful */ | |
48 { .comment = "mark partition successful", | |
49 .validator = InNumberRange, | |
50 .valid_range = &range_1_0, | |
51 .parsed = &successful}, | |
52 /* tries */ | |
53 { .comment = "tries", | |
54 .validator = InNumberRange, | |
55 .valid_range = &range_15_0, | |
56 .parsed = &tries}, | |
57 /* priority */ | |
58 { .comment = "priority to boot", | |
59 .validator = InNumberRange, | |
60 .valid_range = &range_15_0, | |
61 .parsed = &priority}, | |
62 { /* last element, which should be zero. */ } | |
63 }; | |
64 | |
65 void AttributeHelp() { | |
66 printf("\nUsage: %s attribute [OPTIONS] device_name\n\n", progname); | |
67 ShowOptions(attribute_options, attribute_options_details, | |
68 ARRAY_COUNT(attribute_options)); | |
69 } | |
70 | |
71 /* Parses all options (and validates them), then opens the drive and sets | |
72 * corresponding bits in GPT entry. */ | |
73 int CgptAttribute(int argc, char *argv[]) { | |
74 struct drive drive; | |
75 GptEntry *entry; | |
76 | |
77 /* I know this is NOT the perfect place to put code to make options[] and | |
78 * details[] are synced. But this is the best place we have right now since C | |
79 * preprocessor doesn't know sizeof() for #if directive. */ | |
80 assert(ARRAY_COUNT(attribute_options) == | |
81 ARRAY_COUNT(attribute_options_details)); | |
82 | |
83 help = partition = successful = tries = priority = NOT_INITED; | |
84 | |
85 if (CGPT_OK != HandleOptions(argc, argv, | |
86 "hi:b:s:t:p:", | |
87 ARRAY_COUNT(attribute_options), | |
88 attribute_options, | |
89 attribute_options_details)) | |
90 return CGPT_FAILED; | |
91 if (help != NOT_INITED) { | |
92 AttributeHelp(); | |
93 return CGPT_FAILED; | |
94 } | |
95 | |
96 if (CGPT_OK != OpenDriveInLastArgument(argc, argv, &drive)) | |
97 return CGPT_FAILED; | |
98 | |
99 if (CheckValid(&drive) != CGPT_OK) return CGPT_FAILED; | |
100 | |
101 /* partition is not specified, search for the first Chromeos kernel. */ | |
102 if (partition == NOT_INITED) { | |
103 int i; | |
104 for (i = 0; i < GetNumberOfEntries(&drive.gpt); ++i) { | |
105 entry = GetEntry(&drive.gpt, PRIMARY, i); | |
106 if (!Memcmp(&guid_chromeos_kernel, &entry->type, sizeof(Guid))) { | |
107 partition = i+1; | |
108 break; | |
109 } | |
110 } | |
111 if (partition == NOT_INITED) { | |
112 printf("[ERROR] No ChromeOS kernel partition found. " | |
113 "Please use --partition to specify.\n"); | |
114 return CGPT_FAILED; | |
115 } else { | |
116 debug("No --partition is specified. " | |
117 "Found the first ChromeOS kernel in partition [%d].\n", | |
118 partition); | |
119 } | |
120 } | |
121 int index = partition - 1; | |
122 | |
123 if (successful != NOT_INITED) | |
124 SetSuccessful(&drive.gpt, PRIMARY, index, successful); | |
125 if (tries != NOT_INITED) | |
126 SetTries(&drive.gpt, PRIMARY, index, tries); | |
127 if (priority != NOT_INITED) | |
128 SetPriority(&drive.gpt, PRIMARY, index, priority); | |
129 | |
130 /* Display state */ | |
131 entry = GetEntry(&drive.gpt, PRIMARY, index); | |
132 EntryDetails(entry, index, NOT_INITED); | |
133 | |
134 /* Claims primary is good, then secondary will be overwritten. */ | |
135 /* TODO: rspangler broke this during cgptlib refactoring; need to | |
136 * update this to match new internal APIs. */ | |
137 RepairEntries(&drive.gpt, MASK_PRIMARY); | |
138 RepairHeader(&drive.gpt, MASK_PRIMARY); | |
139 | |
140 /* Forces headers and entries are modified so that CRC32 will be re-calculated | |
141 * and headers and entries will be updated to drive. */ | |
142 drive.gpt.modified |= (GPT_MODIFIED_HEADER1 | GPT_MODIFIED_ENTRIES1 | | |
143 GPT_MODIFIED_HEADER2 | GPT_MODIFIED_ENTRIES2); | |
144 UpdateCrc(&drive.gpt); | |
145 DriveClose(&drive); | |
146 | |
147 return CGPT_OK; | |
148 } | |
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