Contents of /tags/mkinitrd-6_3_1/busybox/miscutils/makedevs.c
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Thu Aug 19 12:44:27 2010 UTC (14 years, 1 month ago) by niro
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Thu Aug 19 12:44:27 2010 UTC (14 years, 1 month ago) by niro
File MIME type: text/plain
File size: 5188 byte(s)
tagged 'mkinitrd-6_3_1'
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 "libbb.h" |
11 | |
12 | #if ENABLE_FEATURE_MAKEDEVS_LEAF |
13 | /* |
14 | makedevs NAME TYPE MAJOR MINOR FIRST LAST [s] |
15 | TYPEs: |
16 | b Block device |
17 | c Character device |
18 | f FIFO |
19 | |
20 | FIRST..LAST specify numbers appended to NAME. |
21 | If 's' is the last argument, the base device is created as well. |
22 | Examples: |
23 | makedevs /dev/ttyS c 4 66 2 63 -> ttyS2-ttyS63 |
24 | makedevs /dev/hda b 3 0 0 8 s -> hda,hda1-hda8 |
25 | */ |
26 | int makedevs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
27 | int makedevs_main(int argc, char **argv) |
28 | { |
29 | mode_t mode; |
30 | char *basedev, *type, *nodname, *buf; |
31 | int Smajor, Sminor, S, E; |
32 | |
33 | if (argc < 7 || argv[1][0] == '-') |
34 | bb_show_usage(); |
35 | |
36 | basedev = argv[1]; |
37 | buf = xasprintf("%s%u", argv[1], (unsigned)-1); |
38 | type = argv[2]; |
39 | Smajor = xatoi_u(argv[3]); |
40 | Sminor = xatoi_u(argv[4]); |
41 | S = xatoi_u(argv[5]); |
42 | E = xatoi_u(argv[6]); |
43 | nodname = argv[7] ? basedev : buf; |
44 | |
45 | mode = 0660; |
46 | switch (type[0]) { |
47 | case 'c': |
48 | mode |= S_IFCHR; |
49 | break; |
50 | case 'b': |
51 | mode |= S_IFBLK; |
52 | break; |
53 | case 'f': |
54 | mode |= S_IFIFO; |
55 | break; |
56 | default: |
57 | bb_show_usage(); |
58 | } |
59 | |
60 | while (S <= E) { |
61 | sprintf(buf, "%s%u", basedev, S); |
62 | |
63 | /* if mode != S_IFCHR and != S_IFBLK, |
64 | * third param in mknod() ignored */ |
65 | if (mknod(nodname, mode, makedev(Smajor, Sminor))) |
66 | bb_perror_msg("can't create '%s'", nodname); |
67 | |
68 | /*if (nodname == basedev)*/ /* ex. /dev/hda - to /dev/hda1 ... */ |
69 | nodname = buf; |
70 | S++; |
71 | Sminor++; |
72 | } |
73 | |
74 | return 0; |
75 | } |
76 | |
77 | #elif ENABLE_FEATURE_MAKEDEVS_TABLE |
78 | |
79 | /* Licensed under the GPL v2 or later, see the file LICENSE in this tarball. */ |
80 | |
81 | int makedevs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
82 | int makedevs_main(int argc UNUSED_PARAM, char **argv) |
83 | { |
84 | parser_t *parser; |
85 | char *line = (char *)"-"; |
86 | int ret = EXIT_SUCCESS; |
87 | |
88 | opt_complementary = "=1"; /* exactly one param */ |
89 | getopt32(argv, "d:", &line); |
90 | argv += optind; |
91 | |
92 | xchdir(*argv); /* ensure root dir exists */ |
93 | |
94 | umask(0); |
95 | |
96 | printf("rootdir=%s\ntable=", *argv); |
97 | if (NOT_LONE_DASH(line)) { |
98 | printf("'%s'\n", line); |
99 | } else { |
100 | puts("<stdin>"); |
101 | } |
102 | |
103 | parser = config_open(line); |
104 | while (config_read(parser, &line, 1, 1, "# \t", PARSE_NORMAL)) { |
105 | int linenum; |
106 | char type; |
107 | unsigned mode = 0755; |
108 | unsigned major = 0; |
109 | unsigned minor = 0; |
110 | unsigned count = 0; |
111 | unsigned increment = 0; |
112 | unsigned start = 0; |
113 | char name[41]; |
114 | char user[41]; |
115 | char group[41]; |
116 | char *full_name = name; |
117 | uid_t uid; |
118 | gid_t gid; |
119 | |
120 | linenum = parser->lineno; |
121 | |
122 | if ((2 > sscanf(line, "%40s %c %o %40s %40s %u %u %u %u %u", |
123 | name, &type, &mode, user, group, |
124 | &major, &minor, &start, &increment, &count)) |
125 | || ((unsigned)(major | minor | start | count | increment) > 255) |
126 | ) { |
127 | bb_error_msg("invalid line %d: '%s'", linenum, line); |
128 | ret = EXIT_FAILURE; |
129 | continue; |
130 | } |
131 | |
132 | gid = (*group) ? get_ug_id(group, xgroup2gid) : getgid(); |
133 | uid = (*user) ? get_ug_id(user, xuname2uid) : getuid(); |
134 | /* We are already in the right root dir, |
135 | * so make absolute paths relative */ |
136 | if ('/' == *full_name) |
137 | full_name++; |
138 | |
139 | if (type == 'd') { |
140 | bb_make_directory(full_name, mode | S_IFDIR, FILEUTILS_RECUR); |
141 | if (chown(full_name, uid, gid) == -1) { |
142 | chown_fail: |
143 | bb_perror_msg("line %d: can't chown %s", linenum, full_name); |
144 | ret = EXIT_FAILURE; |
145 | continue; |
146 | } |
147 | if (chmod(full_name, mode) < 0) { |
148 | chmod_fail: |
149 | bb_perror_msg("line %d: can't chmod %s", linenum, full_name); |
150 | ret = EXIT_FAILURE; |
151 | continue; |
152 | } |
153 | } else if (type == 'f') { |
154 | struct stat st; |
155 | if ((stat(full_name, &st) < 0 || !S_ISREG(st.st_mode))) { |
156 | bb_perror_msg("line %d: regular file '%s' does not exist", linenum, full_name); |
157 | ret = EXIT_FAILURE; |
158 | continue; |
159 | } |
160 | if (chown(full_name, uid, gid) < 0) |
161 | goto chown_fail; |
162 | if (chmod(full_name, mode) < 0) |
163 | goto chmod_fail; |
164 | } else { |
165 | dev_t rdev; |
166 | unsigned i; |
167 | char *full_name_inc; |
168 | |
169 | if (type == 'p') { |
170 | mode |= S_IFIFO; |
171 | } else if (type == 'c') { |
172 | mode |= S_IFCHR; |
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 | continue; |
179 | } |
180 | |
181 | full_name_inc = xmalloc(strlen(full_name) + sizeof(int)*3 + 2); |
182 | if (count) |
183 | count--; |
184 | for (i = start; i <= start + count; i++) { |
185 | sprintf(full_name_inc, count ? "%s%u" : "%s", full_name, i); |
186 | rdev = makedev(major, minor + (i - start) * increment); |
187 | if (mknod(full_name_inc, mode, rdev) < 0) { |
188 | bb_perror_msg("line %d: can't create node %s", linenum, full_name_inc); |
189 | ret = EXIT_FAILURE; |
190 | } else if (chown(full_name_inc, uid, gid) < 0) { |
191 | bb_perror_msg("line %d: can't chown %s", linenum, full_name_inc); |
192 | ret = EXIT_FAILURE; |
193 | } else if (chmod(full_name_inc, mode) < 0) { |
194 | bb_perror_msg("line %d: can't chmod %s", linenum, full_name_inc); |
195 | ret = EXIT_FAILURE; |
196 | } |
197 | } |
198 | free(full_name_inc); |
199 | } |
200 | } |
201 | if (ENABLE_FEATURE_CLEAN_UP) |
202 | config_close(parser); |
203 | |
204 | return ret; |
205 | } |
206 | |
207 | #else |
208 | # error makedevs configuration error, either leaf or table must be selected |
209 | #endif |