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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 | |
9 | * properties (partno, start and size). The defauls is only partition type | |
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; | |
60 | ||
61 | static const struct option longopts[] = { | |
62 | { "label", required_argument, NULL, 'x' }, | |
63 | { "device", required_argument, NULL, 'd' }, | |
64 | { "help", no_argument, NULL, 'h' }, | |
65 | { NULL, 0, NULL, 0 }, | |
66 | }; | |
67 | ||
68 | setlocale(LC_ALL, ""); /* just to have enable UTF8 chars */ | |
69 | ||
70 | fdisk_init_debug(0); | |
71 | ||
72 | while((c = getopt_long(argc, argv, "x:d:h", longopts, NULL)) != -1) { | |
73 | switch(c) { | |
74 | case 'x': | |
75 | label = optarg; | |
76 | break; | |
77 | case 'd': | |
78 | device = optarg; | |
79 | break; | |
80 | case 'h': | |
81 | printf("%s [options] <partno,start,size> ...", program_invocation_short_name); | |
82 | fputs(USAGE_SEPARATOR, stdout); | |
83 | puts("Make disklabel and partitions."); | |
84 | puts(" <partno> number from 1..n (4th is extended for MBR)"); | |
85 | puts(" <start> partition start offset in sectors"); | |
86 | puts(" <size> partition size in sectors"); | |
87 | fputs(USAGE_OPTIONS, stdout); | |
88 | puts(" -x, --label <dos,gpt,...> disk label type (default MBR)"); | |
89 | puts(" -d, --device <path> block device"); | |
90 | puts(" -h, --help this help"); | |
91 | fputs(USAGE_SEPARATOR, stdout); | |
92 | return EXIT_SUCCESS; | |
93 | } | |
94 | } | |
95 | ||
96 | if (!device) | |
97 | errx(EXIT_FAILURE, "no device specified"); | |
98 | if (!label) | |
99 | label = "dos"; | |
100 | ||
101 | cxt = fdisk_new_context(); | |
102 | if (!cxt) | |
103 | err_oom(); | |
104 | fdisk_set_ask(cxt, ask_callback, NULL); | |
105 | ||
106 | pa = fdisk_new_partition(); | |
107 | if (!pa) | |
108 | err_oom(); | |
109 | ||
110 | if (fdisk_assign_device(cxt, device, 0)) | |
111 | err(EXIT_FAILURE, "failed to assign device"); | |
f2b6a0c0 | 112 | if (fdisk_create_disklabel(cxt, label)) |
5fb427c8 KZ |
113 | err(EXIT_FAILURE, "failed to create disk label"); |
114 | ||
115 | while (optind < argc) { | |
116 | int rc; | |
117 | unsigned int partno = 0; | |
118 | uint64_t start = 0, size = 0; | |
119 | const char *str = argv[optind]; | |
120 | ||
121 | if (sscanf(str, "%u,%ju,%ju", &partno, &start, &size) != 3) | |
122 | errx(EXIT_FAILURE, "faild to parse %s", str); | |
123 | ||
124 | /* disable defaults */ | |
125 | fdisk_partition_partno_follow_default(pa, 0); | |
126 | fdisk_partition_end_follow_default(pa, 0); | |
127 | ||
128 | /* set all */ | |
129 | fdisk_partition_set_partno(pa, partno - 1); /* library uses 0..n */ | |
130 | fdisk_partition_set_start(pa, start); | |
131 | fdisk_partition_set_size(pa, size); | |
132 | ||
133 | fprintf(stderr, "Requested partition: <partno=%zu,start=%ju,size=%ju>\n", | |
134 | fdisk_partition_get_partno(pa), | |
135 | fdisk_partition_get_start(pa), | |
136 | fdisk_partition_get_size(pa)); | |
137 | ||
138 | if (fdisk_is_label(cxt, DOS)) { | |
139 | /* Make sure last primary partition is extended if user | |
140 | * wants more than 4 partitions. | |
141 | */ | |
142 | if (partno == 4 && optind + 1 < argc) { | |
143 | struct fdisk_parttype *type = | |
144 | fdisk_label_parse_parttype( | |
145 | fdisk_get_label(cxt, NULL), "05"); | |
146 | if (!type) | |
147 | err_oom(); | |
148 | fdisk_partition_set_type(pa, type); | |
149 | fdisk_unref_parttype(type); | |
150 | } | |
151 | } | |
152 | ||
153 | rc = fdisk_add_partition(cxt, pa, NULL); | |
154 | if (rc) { | |
155 | errno = -rc; | |
156 | err(EXIT_FAILURE, "failed to add #%d partition", partno); | |
157 | } | |
158 | ||
159 | fdisk_reset_partition(pa); | |
160 | optind++; | |
161 | } | |
162 | ||
163 | if (fdisk_write_disklabel(cxt)) | |
164 | err(EXIT_FAILURE, "failed to write disk label"); | |
165 | ||
166 | fdisk_deassign_device(cxt, 1); | |
167 | fdisk_unref_context(cxt); | |
168 | fdisk_unref_partition(pa); | |
169 | ||
170 | return EXIT_SUCCESS; | |
171 | } |