About time to just apply this and kill off the patches
[people/mcb30/busybox.git] / miscutils / makedevs.c
1 /* vi: set sw=4 ts=4: */
2
3 #include <stdio.h>
4 #include <stdlib.h>
5 #include <string.h>
6 #include <fcntl.h>
7 #include <getopt.h>
8 #include <time.h>
9 #include <unistd.h>
10 #include <sys/types.h>
11 #include <sys/sysmacros.h>     /* major() and minor() */
12 #include "busybox.h"
13
14 #ifdef CONFIG_FEATURE_MAKEDEVS_LEAF
15 /*
16  * public domain -- Dave 'Kill a Cop' Cinege <dcinege@psychosis.com>
17  *
18  * makedevs
19  * Make ranges of device files quickly.
20  * known bugs: can't deal with alpha ranges
21  */
22 int makedevs_main(int argc, char **argv)
23 {
24         mode_t mode;
25         char *basedev, *type, *nodname, buf[255];
26         int Smajor, Sminor, S, E;
27
28         if (argc < 7 || *argv[1]=='-')
29                 bb_show_usage();
30
31         basedev = argv[1];
32         type = argv[2];
33         Smajor = atoi(argv[3]);
34         Sminor = atoi(argv[4]);
35         S = atoi(argv[5]);
36         E = atoi(argv[6]);
37         nodname = argc == 8 ? basedev : buf;
38
39         mode = 0660;
40
41         switch (type[0]) {
42         case 'c':
43                 mode |= S_IFCHR;
44                 break;
45         case 'b':
46                 mode |= S_IFBLK;
47                 break;
48         case 'f':
49                 mode |= S_IFIFO;
50                 break;
51         default:
52                 bb_show_usage();
53         }
54
55         while (S <= E) {
56                 int sz;
57
58                 sz = snprintf(buf, sizeof(buf), "%s%d", basedev, S);
59                 if(sz<0 || sz>=sizeof(buf))  /* libc different */
60                         bb_error_msg_and_die("%s too large", basedev);
61
62         /* if mode != S_IFCHR and != S_IFBLK third param in mknod() ignored */
63
64                 if (mknod(nodname, mode, makedev(Smajor, Sminor)))
65                         bb_error_msg("Failed to create: %s", nodname);
66
67                 if (nodname == basedev) /* ex. /dev/hda - to /dev/hda1 ... */
68                         nodname = buf;
69                 S++;
70                 Sminor++;
71         }
72
73         return 0;
74 }
75
76 #elif defined CONFIG_FEATURE_MAKEDEVS_TABLE
77
78 /*
79  *  This program is free software; you can redistribute it and/or modify
80  *  it under the terms of the GNU General Public License version 2 as
81  *  published by the Free Software Foundation.
82  *
83  *  This program is distributed in the hope that it will be useful,
84  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
85  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
86  *  GNU Library General Public License for more details.
87  *
88  *  You should have received a copy of the GNU General Public License
89  *  along with this program; if not, write to the Free Software
90  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
91  *
92  */
93
94 static const struct option makedevs_long_options[] = {
95         {"root", 1, NULL, 'r'},
96         {0, 0, 0, 0}
97 };
98
99 extern int makedevs_main(int argc, char **argv)
100 {
101         FILE *table;
102         int opt;
103         char *rootdir = "./";
104         char *line;
105         int ret = EXIT_SUCCESS;
106
107         bb_opt_complementaly = "d~r";
108         bb_applet_long_options = makedevs_long_options;
109         opt = bb_getopt_ulflags(argc, argv, "d:r:", &rootdir, &rootdir);
110
111         if (optind + 1 == argc) {
112                 table = bb_xfopen(argv[optind], "r");
113         } else {
114                 table = stdin;
115         }
116
117         if (chdir(rootdir) == -1) {
118                 bb_perror_msg_and_die("Couldnt chdor to %s", rootdir);
119         }
120
121         umask(0);
122
123         while ((line = bb_get_chomped_line_from_file(table))) {
124                 char type;
125                 unsigned int mode = 0755;
126                 unsigned int major = 0;
127                 unsigned int minor = 0;
128                 unsigned int count = 0;
129                 unsigned int increment = 0;
130                 unsigned int start = 0;
131                 char name[41];
132                 char user[41];
133                 char group[41];
134                 char *full_name;
135                 uid_t uid;
136                 gid_t gid;
137
138                 if ((2 > sscanf(line, "%40s %c %o %40s %40s %u %u %u %u %u", name,
139                         &type, &mode, user, group, &major,
140                         &minor, &start, &increment, &count)) ||
141                         ((major | minor | start | count | increment) > 255)) {
142                         bb_error_msg("Ignoring invalid line\n%s\n", line);
143                         ret = EXIT_FAILURE;
144                         continue;
145                 }
146                 if (name[0] == '#') {
147                         continue;
148                 }
149                 if (group) {
150                         gid = get_ug_id(group, my_getgrnam);
151                 } else {
152                         gid = getgid();
153                 }
154                 if (user) {
155                         uid = get_ug_id(user, my_getpwnam);
156                 } else {
157                         uid = getuid();
158                 }
159                 full_name = concat_path_file(rootdir, name);
160
161                 if (type == 'd') {
162                         bb_make_directory(full_name, mode | S_IFDIR, 0);
163                         if (chown(full_name, uid, gid) == -1) {
164                                 bb_perror_msg("chown failed for %s", full_name);
165                                 ret = EXIT_FAILURE;
166                                 goto loop;
167                         }
168                 } else {
169                         dev_t rdev;
170
171                         if (type == 'p') {
172                                 mode |= S_IFIFO;
173                         }
174                         else if (type == 'c') {
175                                 mode |= S_IFCHR;
176                         }
177                         else if (type == 'b') {
178                                 mode |= S_IFBLK;
179                         } else {
180                                 bb_error_msg("Unsupported file type %c", type);
181                                 ret = EXIT_FAILURE;
182                                 goto loop;
183                         }
184
185                         if (count > 0) {
186                                 int i;
187                                 char *full_name_inc;
188
189                                 full_name_inc = xmalloc(strlen(full_name) + 4);
190                                 for (i = start; i < count; i++) {
191                                         sprintf(full_name_inc, "%s%d", full_name, i);
192                                         rdev = (major << 8) + minor + (i * increment - start);
193                                         if (mknod(full_name_inc, mode, rdev) == -1) {
194                                                 bb_perror_msg("Couldnt create node %s", full_name_inc);
195                                                 ret = EXIT_FAILURE;
196                                         }
197                                         else if (chown(full_name_inc, uid, gid) == -1) {
198                                                 bb_perror_msg("chown failed for %s", 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("Couldnt create node %s", full_name);
207                                         ret = EXIT_FAILURE;
208                                 }
209                                 else if (chown(full_name, uid, gid) == -1) {
210                                         bb_perror_msg("chown failed for %s", full_name);
211                                         ret = EXIT_FAILURE;
212                                 }
213                         }
214                 }
215 loop:
216                 free(line);
217                 free(full_name);
218         }
219         fclose(table);
220
221         return 0;
222 }
223 #else
224 # error makdedevs configuration error, either leaf or table must be selected
225 #endif