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5fb427c8 KZ |
1 | /* |
2 | * Copyright (C) 2017 Karel Zak <kzak@redhat.com> | |
3 | * | |
4 | * This file may be redistributed under the terms of the | |
5 | * GNU Lesser General Public License. | |
6 | * | |
7 | * | |
8 | * Libfdisk sample to create partitions by specify all required partition | |
11026083 | 9 | * properties (partno, start and size). The default is only partition type |
5fb427c8 KZ |
10 | * (except MBR where 4th partition is extended). |
11 | */ | |
12 | #include <stdlib.h> | |
13 | #include <unistd.h> | |
14 | #include <string.h> | |
15 | #include <errno.h> | |
16 | #include <sys/types.h> | |
17 | #include <sys/stat.h> | |
18 | #include <dirent.h> | |
19 | #include <getopt.h> | |
20 | ||
21 | #include "c.h" | |
22 | #include "nls.h" | |
23 | #include "strutils.h" | |
24 | #include "xalloc.h" | |
25 | ||
26 | #include "libfdisk.h" | |
27 | ||
28 | static int ask_callback(struct fdisk_context *cxt __attribute__((__unused__)), | |
29 | struct fdisk_ask *ask, | |
30 | void *data) | |
31 | { | |
32 | switch(fdisk_ask_get_type(ask)) { | |
33 | case FDISK_ASKTYPE_INFO: | |
34 | fputs(fdisk_ask_print_get_mesg(ask), stdout); | |
35 | fputc('\n', stdout); | |
36 | break; | |
37 | case FDISK_ASKTYPE_WARNX: | |
38 | fflush(stdout); | |
39 | fputs(fdisk_ask_print_get_mesg(ask), stderr); | |
40 | fputc('\n', stderr); | |
41 | break; | |
42 | case FDISK_ASKTYPE_WARN: | |
43 | fflush(stdout); | |
44 | fputs(fdisk_ask_print_get_mesg(ask), stderr); | |
45 | errno = fdisk_ask_print_get_errno(ask); | |
46 | fprintf(stderr, ": %m\n"); | |
47 | break; | |
48 | default: | |
49 | break; | |
50 | } | |
51 | return 0; | |
52 | } | |
53 | ||
54 | int main(int argc, char *argv[]) | |
55 | { | |
56 | struct fdisk_context *cxt; | |
57 | struct fdisk_partition *pa; | |
58 | const char *label = NULL, *device = NULL; | |
59 | int c; | |
ea369079 | 60 | size_t n = 1; |
5fb427c8 KZ |
61 | |
62 | static const struct option longopts[] = { | |
63 | { "label", required_argument, NULL, 'x' }, | |
64 | { "device", required_argument, NULL, 'd' }, | |
65 | { "help", no_argument, NULL, 'h' }, | |
66 | { NULL, 0, NULL, 0 }, | |
67 | }; | |
68 | ||
69 | setlocale(LC_ALL, ""); /* just to have enable UTF8 chars */ | |
70 | ||
71 | fdisk_init_debug(0); | |
72 | ||
73 | while((c = getopt_long(argc, argv, "x:d:h", longopts, NULL)) != -1) { | |
74 | switch(c) { | |
75 | case 'x': | |
76 | label = optarg; | |
77 | break; | |
78 | case 'd': | |
79 | device = optarg; | |
80 | break; | |
81 | case 'h': | |
ea369079 | 82 | printf("%s [options] -- <partno,start,size> ...", program_invocation_short_name); |
5fb427c8 KZ |
83 | fputs(USAGE_SEPARATOR, stdout); |
84 | puts("Make disklabel and partitions."); | |
ea369079 | 85 | puts(" <partno> 1..n (4th is extended for MBR), or '-' for default"); |
5fb427c8 KZ |
86 | puts(" <start> partition start offset in sectors"); |
87 | puts(" <size> partition size in sectors"); | |
88 | fputs(USAGE_OPTIONS, stdout); | |
89 | puts(" -x, --label <dos,gpt,...> disk label type (default MBR)"); | |
90 | puts(" -d, --device <path> block device"); | |
91 | puts(" -h, --help this help"); | |
92 | fputs(USAGE_SEPARATOR, stdout); | |
93 | return EXIT_SUCCESS; | |
94 | } | |
95 | } | |
96 | ||
97 | if (!device) | |
98 | errx(EXIT_FAILURE, "no device specified"); | |
99 | if (!label) | |
100 | label = "dos"; | |
101 | ||
102 | cxt = fdisk_new_context(); | |
103 | if (!cxt) | |
104 | err_oom(); | |
105 | fdisk_set_ask(cxt, ask_callback, NULL); | |
106 | ||
107 | pa = fdisk_new_partition(); | |
108 | if (!pa) | |
109 | err_oom(); | |
110 | ||
111 | if (fdisk_assign_device(cxt, device, 0)) | |
112 | err(EXIT_FAILURE, "failed to assign device"); | |
f2b6a0c0 | 113 | if (fdisk_create_disklabel(cxt, label)) |
5fb427c8 KZ |
114 | err(EXIT_FAILURE, "failed to create disk label"); |
115 | ||
ea369079 KZ |
116 | fdisk_disable_dialogs(cxt, 1); |
117 | ||
5fb427c8 KZ |
118 | while (optind < argc) { |
119 | int rc; | |
120 | unsigned int partno = 0; | |
121 | uint64_t start = 0, size = 0; | |
122 | const char *str = argv[optind]; | |
123 | ||
ea369079 | 124 | fdisk_reset_partition(pa); |
5fb427c8 KZ |
125 | fdisk_partition_end_follow_default(pa, 0); |
126 | ||
ea369079 KZ |
127 | if (*str == '-') { |
128 | /* partno unspecified */ | |
129 | if (sscanf(str, "-,%"SCNu64",%"SCNu64"", &start, &size) != 2) | |
73afd3f8 | 130 | errx(EXIT_FAILURE, "failed to parse %s", str); |
ea369079 KZ |
131 | fdisk_partition_partno_follow_default(pa, 1); |
132 | fdisk_partition_unset_partno(pa); | |
133 | } else { | |
134 | /* partno specified */ | |
135 | if (sscanf(str, "%u,%"SCNu64",%"SCNu64"", &partno, &start, &size) != 3) | |
73afd3f8 | 136 | errx(EXIT_FAILURE, "failed to parse %s", str); |
ea369079 KZ |
137 | |
138 | fdisk_partition_partno_follow_default(pa, 0); | |
139 | fdisk_partition_set_partno(pa, partno - 1); /* library uses 0..n */ | |
140 | } | |
141 | ||
5fb427c8 KZ |
142 | fdisk_partition_set_start(pa, start); |
143 | fdisk_partition_set_size(pa, size); | |
144 | ||
ea369079 | 145 | if (fdisk_partition_has_partno(pa)) |
b161f810 | 146 | fprintf(stdout, "Requested partition: <partno=%zu,start=%ju,size=%ju>\n", |
ea369079 KZ |
147 | fdisk_partition_get_partno(pa), |
148 | (uintmax_t) fdisk_partition_get_start(pa), | |
149 | (uintmax_t) fdisk_partition_get_size(pa)); | |
150 | else | |
b161f810 | 151 | fprintf(stdout, "Requested partition: <partno=<default>,start=%ju,size=%ju>\n", |
ea369079 KZ |
152 | (uintmax_t) fdisk_partition_get_start(pa), |
153 | (uintmax_t) fdisk_partition_get_size(pa)); | |
5fb427c8 KZ |
154 | |
155 | if (fdisk_is_label(cxt, DOS)) { | |
156 | /* Make sure last primary partition is extended if user | |
157 | * wants more than 4 partitions. | |
158 | */ | |
ea369079 KZ |
159 | if ((partno == 4 || (n == 4 && !fdisk_partition_has_partno(pa))) |
160 | && optind + 1 < argc) { | |
5fb427c8 KZ |
161 | struct fdisk_parttype *type = |
162 | fdisk_label_parse_parttype( | |
163 | fdisk_get_label(cxt, NULL), "05"); | |
164 | if (!type) | |
165 | err_oom(); | |
166 | fdisk_partition_set_type(pa, type); | |
167 | fdisk_unref_parttype(type); | |
168 | } | |
169 | } | |
170 | ||
171 | rc = fdisk_add_partition(cxt, pa, NULL); | |
172 | if (rc) { | |
173 | errno = -rc; | |
ea369079 KZ |
174 | errx(EXIT_FAILURE, "failed to add #%zu partition", |
175 | fdisk_partition_has_partno(pa) ? | |
176 | fdisk_partition_get_partno(pa) + 1: n); | |
5fb427c8 KZ |
177 | } |
178 | ||
179 | fdisk_reset_partition(pa); | |
180 | optind++; | |
ea369079 | 181 | n++; |
5fb427c8 KZ |
182 | } |
183 | ||
184 | if (fdisk_write_disklabel(cxt)) | |
185 | err(EXIT_FAILURE, "failed to write disk label"); | |
186 | ||
187 | fdisk_deassign_device(cxt, 1); | |
188 | fdisk_unref_context(cxt); | |
189 | fdisk_unref_partition(pa); | |
190 | ||
191 | return EXIT_SUCCESS; | |
192 | } |