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-rw-r--r--miscutils/makedevs.c230
1 files changed, 230 insertions, 0 deletions
diff --git a/miscutils/makedevs.c b/miscutils/makedevs.c
new file mode 100644
index 000000000..3bc1559c7
--- /dev/null
+++ b/miscutils/makedevs.c
@@ -0,0 +1,230 @@
1/* vi: set sw=4 ts=4: */
2/*
3 * public domain -- Dave 'Kill a Cop' Cinege <dcinege@psychosis.com>
4 *
5 * makedevs
6 * Make ranges of device files quickly.
7 * known bugs: can't deal with alpha ranges
8 */
9
10#include "busybox.h"
11
12#ifdef CONFIG_FEATURE_MAKEDEVS_LEAF
13int makedevs_main(int argc, char **argv)
14{
15 mode_t mode;
16 char *basedev, *type, *nodname, buf[255];
17 int Smajor, Sminor, S, E;
18
19 if (argc < 7 || *argv[1]=='-')
20 bb_show_usage();
21
22 basedev = argv[1];
23 type = argv[2];
24 Smajor = xatoi_u(argv[3]);
25 Sminor = xatoi_u(argv[4]);
26 S = xatoi_u(argv[5]);
27 E = xatoi_u(argv[6]);
28 nodname = argc == 8 ? basedev : buf;
29
30 mode = 0660;
31
32 switch (type[0]) {
33 case 'c':
34 mode |= S_IFCHR;
35 break;
36 case 'b':
37 mode |= S_IFBLK;
38 break;
39 case 'f':
40 mode |= S_IFIFO;
41 break;
42 default:
43 bb_show_usage();
44 }
45
46 while (S <= E) {
47 int sz;
48
49 sz = snprintf(buf, sizeof(buf), "%s%d", basedev, S);
50 if(sz<0 || sz>=sizeof(buf)) /* libc different */
51 bb_error_msg_and_die("%s too large", basedev);
52
53 /* if mode != S_IFCHR and != S_IFBLK third param in mknod() ignored */
54
55 if (mknod(nodname, mode, makedev(Smajor, Sminor)))
56 bb_error_msg("failed to create: %s", nodname);
57
58 if (nodname == basedev) /* ex. /dev/hda - to /dev/hda1 ... */
59 nodname = buf;
60 S++;
61 Sminor++;
62 }
63
64 return 0;
65}
66
67#elif defined CONFIG_FEATURE_MAKEDEVS_TABLE
68
69/* Licensed under the GPL v2 or later, see the file LICENSE in this tarball. */
70
71int makedevs_main(int argc, char **argv)
72{
73 FILE *table = stdin;
74 char *rootdir = NULL;
75 char *line = NULL;
76 int linenum = 0;
77 int ret = EXIT_SUCCESS;
78
79 getopt32(argc, argv, "d:", &line);
80 if (line)
81 table = xfopen(line, "r");
82
83 if (optind >= argc || (rootdir=argv[optind])==NULL) {
84 bb_error_msg_and_die("root directory not specified");
85 }
86
87 xchdir(rootdir);
88
89 umask(0);
90
91 printf("rootdir=%s\n", rootdir);
92 if (line) {
93 printf("table='%s'\n", line);
94 } else {
95 printf("table=<stdin>\n");
96 }
97
98 while ((line = xmalloc_getline(table))) {
99 char type;
100 unsigned int mode = 0755;
101 unsigned int major = 0;
102 unsigned int minor = 0;
103 unsigned int count = 0;
104 unsigned int increment = 0;
105 unsigned int start = 0;
106 char name[41];
107 char user[41];
108 char group[41];
109 char *full_name;
110 uid_t uid;
111 gid_t gid;
112
113 linenum++;
114
115 if ((2 > sscanf(line, "%40s %c %o %40s %40s %u %u %u %u %u", name,
116 &type, &mode, user, group, &major,
117 &minor, &start, &increment, &count)) ||
118 ((major | minor | start | count | increment) > 255))
119 {
120 if (*line=='\0' || *line=='#' || isspace(*line))
121 continue;
122 bb_error_msg("line %d invalid: '%s'", linenum, line);
123 ret = EXIT_FAILURE;
124 continue;
125 }
126 if (name[0] == '#') {
127 continue;
128 }
129
130 gid = (*group) ? get_ug_id(group, bb_xgetgrnam) : getgid();
131 uid = (*user) ? get_ug_id(user, bb_xgetpwnam) : getuid();
132 full_name = concat_path_file(rootdir, name);
133
134 if (type == 'd') {
135 bb_make_directory(full_name, mode | S_IFDIR, FILEUTILS_RECUR);
136 if (chown(full_name, uid, gid) == -1) {
137 bb_perror_msg("line %d: chown failed for %s", linenum, full_name);
138 ret = EXIT_FAILURE;
139 goto loop;
140 }
141 if ((mode != -1) && (chmod(full_name, mode) < 0)){
142 bb_perror_msg("line %d: chmod failed for %s", linenum, full_name);
143 ret = EXIT_FAILURE;
144 goto loop;
145 }
146 } else if (type == 'f') {
147 struct stat st;
148 if ((stat(full_name, &st) < 0 || !S_ISREG(st.st_mode))) {
149 bb_perror_msg("line %d: regular file '%s' does not exist", linenum, full_name);
150 ret = EXIT_FAILURE;
151 goto loop;
152 }
153 if (chown(full_name, uid, gid) == -1) {
154 bb_perror_msg("line %d: chown failed for %s", linenum, full_name);
155 ret = EXIT_FAILURE;
156 goto loop;
157 }
158 if ((mode != -1) && (chmod(full_name, mode) < 0)){
159 bb_perror_msg("line %d: chmod failed for %s", linenum, full_name);
160 ret = EXIT_FAILURE;
161 goto loop;
162 }
163 } else
164 {
165 dev_t rdev;
166
167 if (type == 'p') {
168 mode |= S_IFIFO;
169 }
170 else if (type == 'c') {
171 mode |= S_IFCHR;
172 }
173 else if (type == 'b') {
174 mode |= S_IFBLK;
175 } else {
176 bb_error_msg("line %d: unsupported file type %c", linenum, type);
177 ret = EXIT_FAILURE;
178 goto loop;
179 }
180
181 if (count > 0) {
182 int i;
183 char *full_name_inc;
184
185 full_name_inc = xmalloc(strlen(full_name) + 4);
186 for (i = start; i < count; i++) {
187 sprintf(full_name_inc, "%s%d", full_name, i);
188 rdev = (major << 8) + minor + (i * increment - start);
189 if (mknod(full_name_inc, mode, rdev) == -1) {
190 bb_perror_msg("line %d: cannot create node %s", linenum, full_name_inc);
191 ret = EXIT_FAILURE;
192 }
193 else if (chown(full_name_inc, uid, gid) == -1) {
194 bb_perror_msg("line %d: chown failed for %s", linenum, full_name_inc);
195 ret = EXIT_FAILURE;
196 }
197 if ((mode != -1) && (chmod(full_name_inc, mode) < 0)){
198 bb_perror_msg("line %d: chmod failed for %s", linenum, full_name_inc);
199 ret = EXIT_FAILURE;
200 }
201 }
202 free(full_name_inc);
203 } else {
204 rdev = (major << 8) + minor;
205 if (mknod(full_name, mode, rdev) == -1) {
206 bb_perror_msg("line %d: cannot create node %s", linenum, full_name);
207 ret = EXIT_FAILURE;
208 }
209 else if (chown(full_name, uid, gid) == -1) {
210 bb_perror_msg("line %d: chown failed for %s", linenum, full_name);
211 ret = EXIT_FAILURE;
212 }
213 if ((mode != -1) && (chmod(full_name, mode) < 0)){
214 bb_perror_msg("line %d: chmod failed for %s", linenum, full_name);
215 ret = EXIT_FAILURE;
216 }
217 }
218 }
219loop:
220 free(line);
221 free(full_name);
222 }
223 fclose(table);
224
225 return ret;
226}
227
228#else
229# error makedevs configuration error, either leaf or table must be selected
230#endif
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-08-14 15:57:25 +0000