Annotation of /tags/mkinitrd-6_3_1/busybox/miscutils/makedevs.c
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Wed Aug 18 21:56:57 2010 UTC (13 years, 10 months ago) by niro
Original Path: trunk/mkinitrd-magellan/busybox/miscutils/makedevs.c
File MIME type: text/plain
File size: 5188 byte(s)
Wed Aug 18 21:56:57 2010 UTC (13 years, 10 months ago) by niro
Original Path: trunk/mkinitrd-magellan/busybox/miscutils/makedevs.c
File MIME type: text/plain
File size: 5188 byte(s)
-updated to busybox-1.17.1
1 | niro | 532 | /* 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 | niro | 816 | #include "libbb.h" |
11 | niro | 532 | |
12 | niro | 816 | #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 | niro | 532 | int makedevs_main(int argc, char **argv) |
28 | { | ||
29 | mode_t mode; | ||
30 | niro | 816 | char *basedev, *type, *nodname, *buf; |
31 | niro | 532 | int Smajor, Sminor, S, E; |
32 | |||
33 | niro | 816 | if (argc < 7 || argv[1][0] == '-') |
34 | niro | 532 | bb_show_usage(); |
35 | |||
36 | basedev = argv[1]; | ||
37 | niro | 816 | buf = xasprintf("%s%u", argv[1], (unsigned)-1); |
38 | niro | 532 | 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 | niro | 816 | nodname = argv[7] ? basedev : buf; |
44 | niro | 532 | |
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 | niro | 816 | sprintf(buf, "%s%u", basedev, S); |
62 | niro | 532 | |
63 | niro | 816 | /* if mode != S_IFCHR and != S_IFBLK, |
64 | * third param in mknod() ignored */ | ||
65 | niro | 532 | if (mknod(nodname, mode, makedev(Smajor, Sminor))) |
66 | niro | 1123 | bb_perror_msg("can't create '%s'", nodname); |
67 | niro | 532 | |
68 | niro | 816 | /*if (nodname == basedev)*/ /* ex. /dev/hda - to /dev/hda1 ... */ |
69 | niro | 532 | nodname = buf; |
70 | S++; | ||
71 | Sminor++; | ||
72 | } | ||
73 | |||
74 | return 0; | ||
75 | } | ||
76 | |||
77 | niro | 816 | #elif ENABLE_FEATURE_MAKEDEVS_TABLE |
78 | niro | 532 | |
79 | /* Licensed under the GPL v2 or later, see the file LICENSE in this tarball. */ | ||
80 | |||
81 | niro | 816 | int makedevs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
82 | int makedevs_main(int argc UNUSED_PARAM, char **argv) | ||
83 | niro | 532 | { |
84 | niro | 816 | parser_t *parser; |
85 | char *line = (char *)"-"; | ||
86 | niro | 532 | int ret = EXIT_SUCCESS; |
87 | |||
88 | niro | 816 | opt_complementary = "=1"; /* exactly one param */ |
89 | getopt32(argv, "d:", &line); | ||
90 | argv += optind; | ||
91 | niro | 532 | |
92 | niro | 816 | xchdir(*argv); /* ensure root dir exists */ |
93 | niro | 532 | |
94 | umask(0); | ||
95 | |||
96 | niro | 816 | printf("rootdir=%s\ntable=", *argv); |
97 | if (NOT_LONE_DASH(line)) { | ||
98 | printf("'%s'\n", line); | ||
99 | niro | 532 | } else { |
100 | niro | 816 | puts("<stdin>"); |
101 | niro | 532 | } |
102 | |||
103 | niro | 816 | parser = config_open(line); |
104 | while (config_read(parser, &line, 1, 1, "# \t", PARSE_NORMAL)) { | ||
105 | int linenum; | ||
106 | niro | 532 | char type; |
107 | niro | 816 | unsigned mode = 0755; |
108 | unsigned major = 0; | ||
109 | unsigned minor = 0; | ||
110 | unsigned count = 0; | ||
111 | unsigned increment = 0; | ||
112 | unsigned start = 0; | ||
113 | niro | 532 | char name[41]; |
114 | char user[41]; | ||
115 | char group[41]; | ||
116 | niro | 816 | char *full_name = name; |
117 | niro | 532 | uid_t uid; |
118 | gid_t gid; | ||
119 | |||
120 | niro | 816 | linenum = parser->lineno; |
121 | niro | 532 | |
122 | niro | 816 | 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 | niro | 532 | 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 | niro | 816 | /* We are already in the right root dir, |
135 | * so make absolute paths relative */ | ||
136 | if ('/' == *full_name) | ||
137 | full_name++; | ||
138 | niro | 532 | |
139 | if (type == 'd') { | ||
140 | bb_make_directory(full_name, mode | S_IFDIR, FILEUTILS_RECUR); | ||
141 | if (chown(full_name, uid, gid) == -1) { | ||
142 | niro | 816 | chown_fail: |
143 | bb_perror_msg("line %d: can't chown %s", linenum, full_name); | ||
144 | niro | 532 | ret = EXIT_FAILURE; |
145 | niro | 816 | continue; |
146 | niro | 532 | } |
147 | niro | 816 | if (chmod(full_name, mode) < 0) { |
148 | chmod_fail: | ||
149 | bb_perror_msg("line %d: can't chmod %s", linenum, full_name); | ||
150 | niro | 532 | ret = EXIT_FAILURE; |
151 | niro | 816 | continue; |
152 | niro | 532 | } |
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 | niro | 816 | continue; |
159 | niro | 532 | } |
160 | niro | 816 | 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 | niro | 532 | dev_t rdev; |
166 | niro | 816 | unsigned i; |
167 | char *full_name_inc; | ||
168 | niro | 532 | |
169 | if (type == 'p') { | ||
170 | mode |= S_IFIFO; | ||
171 | niro | 816 | } else if (type == 'c') { |
172 | niro | 532 | mode |= S_IFCHR; |
173 | niro | 816 | } else if (type == 'b') { |
174 | niro | 532 | mode |= S_IFBLK; |
175 | } else { | ||
176 | bb_error_msg("line %d: unsupported file type %c", linenum, type); | ||
177 | ret = EXIT_FAILURE; | ||
178 | niro | 816 | continue; |
179 | niro | 532 | } |
180 | |||
181 | niro | 816 | 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 | niro | 532 | ret = EXIT_FAILURE; |
190 | niro | 816 | } else if (chown(full_name_inc, uid, gid) < 0) { |
191 | bb_perror_msg("line %d: can't chown %s", linenum, full_name_inc); | ||
192 | niro | 532 | ret = EXIT_FAILURE; |
193 | niro | 816 | } else if (chmod(full_name_inc, mode) < 0) { |
194 | bb_perror_msg("line %d: can't chmod %s", linenum, full_name_inc); | ||
195 | niro | 532 | ret = EXIT_FAILURE; |
196 | } | ||
197 | } | ||
198 | niro | 816 | free(full_name_inc); |
199 | niro | 532 | } |
200 | } | ||
201 | niro | 816 | if (ENABLE_FEATURE_CLEAN_UP) |
202 | config_close(parser); | ||
203 | niro | 532 | |
204 | return ret; | ||
205 | } | ||
206 | |||
207 | #else | ||
208 | # error makedevs configuration error, either leaf or table must be selected | ||
209 | #endif |