1 | /* |
---|
2 | ------------------------------------------------------------------------ |
---|
3 | $Id$ |
---|
4 | ------------------------------------------------------------------------ |
---|
5 | |
---|
6 | Copyright Cybertec Pty Ltd, 2000 |
---|
7 | All rights reserved Cybertec Pty Ltd, 2000 |
---|
8 | |
---|
9 | COPYRIGHT (c) 1989-1998. |
---|
10 | On-Line Applications Research Corporation (OAR). |
---|
11 | |
---|
12 | The license and distribution terms for this file may be |
---|
13 | found in the file LICENSE in this distribution or at |
---|
14 | |
---|
15 | http://www.rtems.com/license/LICENSE. |
---|
16 | |
---|
17 | This software with is provided ``as is'' and with NO WARRANTY. |
---|
18 | |
---|
19 | ------------------------------------------------------------------------ |
---|
20 | |
---|
21 | Set of helpers when creating a root file system. The root filesystem |
---|
22 | in RTEMS is the In Memory Filesystem (IMFS). We could copy an exiting |
---|
23 | filesystem to here, how-ever a number of files can have target |
---|
24 | specific initialisation info which we need to write. |
---|
25 | |
---|
26 | */ |
---|
27 | |
---|
28 | #if HAVE_CONFIG_H |
---|
29 | #include "config.h" |
---|
30 | #endif |
---|
31 | |
---|
32 | #include <errno.h> |
---|
33 | #include <stdio.h> |
---|
34 | #include <string.h> |
---|
35 | #include <sys/stat.h> |
---|
36 | #include <sys/types.h> |
---|
37 | #include <fcntl.h> |
---|
38 | #include <unistd.h> |
---|
39 | #include <sys/socket.h> |
---|
40 | #include <netinet/in.h> |
---|
41 | #include <arpa/inet.h> |
---|
42 | |
---|
43 | #include <rtems/mkrootfs.h> |
---|
44 | |
---|
45 | /* |
---|
46 | * A table a list of names and their modes. |
---|
47 | */ |
---|
48 | |
---|
49 | typedef struct rtems_rootfs_dir_table |
---|
50 | { |
---|
51 | const char *name; |
---|
52 | int mode; |
---|
53 | } rtems_rootfs_dir_table; |
---|
54 | |
---|
55 | /* |
---|
56 | * Table of directorys to make. |
---|
57 | */ |
---|
58 | |
---|
59 | static const rtems_rootfs_dir_table default_directories[] = |
---|
60 | { |
---|
61 | { "/bin", S_IFDIR | S_IRWXU | S_IXGRP | S_IRGRP | S_IROTH | S_IXOTH }, |
---|
62 | { "/etc", S_IFDIR | S_IRWXU | S_IXGRP | S_IRGRP | S_IROTH | S_IXOTH }, |
---|
63 | { "/dev", S_IFDIR | S_IRWXU | S_IXGRP | S_IRGRP | S_IROTH | S_IXOTH }, |
---|
64 | { "/usr/bin", S_IFDIR | S_IRWXU | S_IXGRP | S_IRGRP | S_IROTH | S_IXOTH } |
---|
65 | }; |
---|
66 | |
---|
67 | #define MKFILE_MODE (S_IRUSR | S_IWUSR | S_IWGRP | S_IRGRP | S_IROTH) |
---|
68 | #define MKDIR_MODE (S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) |
---|
69 | |
---|
70 | /* |
---|
71 | * Create enough files to support the networking stack. |
---|
72 | * Points to a table of strings. |
---|
73 | */ |
---|
74 | |
---|
75 | int |
---|
76 | rtems_rootfs_file_append (const char *file, |
---|
77 | mode_t omode, |
---|
78 | const int line_cnt, |
---|
79 | const char **lines) |
---|
80 | { |
---|
81 | struct stat sb; |
---|
82 | int fd; |
---|
83 | int i; |
---|
84 | |
---|
85 | /* |
---|
86 | * See is a file exists. If it does not, create the |
---|
87 | * file and the path to the file. |
---|
88 | */ |
---|
89 | |
---|
90 | fd = -1; |
---|
91 | |
---|
92 | if (stat(file, &sb)) |
---|
93 | { |
---|
94 | if (errno == ENOENT) |
---|
95 | { |
---|
96 | /* |
---|
97 | * Get the path to the file if one exists and create the |
---|
98 | * path. If it exists nothing happens. |
---|
99 | */ |
---|
100 | |
---|
101 | int i = strlen (file); |
---|
102 | |
---|
103 | while (i) |
---|
104 | { |
---|
105 | if (file[i] == '/') |
---|
106 | { |
---|
107 | char path[128]; |
---|
108 | |
---|
109 | if (i >= sizeof path) |
---|
110 | { |
---|
111 | printf ("root fs, path too long `%s'\n", file); |
---|
112 | return -1; |
---|
113 | } |
---|
114 | |
---|
115 | strncpy (path, file, i); |
---|
116 | path[i] = '\0'; |
---|
117 | |
---|
118 | if (rtems_mkdir (path, MKDIR_MODE)) |
---|
119 | return -1; |
---|
120 | break; |
---|
121 | } |
---|
122 | i--; |
---|
123 | } |
---|
124 | |
---|
125 | if ((fd = open (file, O_CREAT | O_APPEND | O_WRONLY, omode)) < 0) |
---|
126 | { |
---|
127 | printf ("root fs, cannot create file `%s' : %s\n", |
---|
128 | file, strerror (errno)); |
---|
129 | return -1; |
---|
130 | } |
---|
131 | } |
---|
132 | } |
---|
133 | |
---|
134 | if (fd < 0) |
---|
135 | { |
---|
136 | if ((fd = open (file, O_APPEND | O_WRONLY)) < 0) |
---|
137 | { |
---|
138 | printf ("root fs, cannot open file `%s' : %s\n", |
---|
139 | file, strerror (errno)); |
---|
140 | return -1; |
---|
141 | } |
---|
142 | } |
---|
143 | |
---|
144 | for (i = 0; i < line_cnt; i++) |
---|
145 | { |
---|
146 | int len = strlen (lines[i]); |
---|
147 | |
---|
148 | if (len) |
---|
149 | { |
---|
150 | if (write (fd, lines[i], strlen (lines[i])) < 0) |
---|
151 | { |
---|
152 | close (fd); |
---|
153 | printf ("root fs, cannot write to `%s' : %s\n", |
---|
154 | file, strerror (errno)); |
---|
155 | return -1; |
---|
156 | } |
---|
157 | } |
---|
158 | } |
---|
159 | |
---|
160 | return close (fd); |
---|
161 | } |
---|
162 | |
---|
163 | /* |
---|
164 | * Write hosts record. |
---|
165 | */ |
---|
166 | |
---|
167 | int |
---|
168 | rtems_rootfs_append_host_rec (in_addr_t cip, |
---|
169 | const char *cname, |
---|
170 | const char *dname) |
---|
171 | { |
---|
172 | char buf[128]; |
---|
173 | char *bufp = buf; |
---|
174 | const char *bufl[1]; |
---|
175 | struct in_addr ip; |
---|
176 | |
---|
177 | ip.s_addr = cip; |
---|
178 | |
---|
179 | if (cname && strlen (cname)) |
---|
180 | { |
---|
181 | snprintf (bufp, sizeof (buf), "%s\t\t%s", inet_ntoa (ip), cname); |
---|
182 | bufp += strlen (buf); |
---|
183 | |
---|
184 | if (dname && strlen (dname)) |
---|
185 | { |
---|
186 | snprintf (bufp, sizeof (buf), "\t\t%s.%s", cname, dname); |
---|
187 | bufp += strlen (buf); |
---|
188 | } |
---|
189 | |
---|
190 | strcat (buf, "\n"); |
---|
191 | |
---|
192 | bufl[0] = buf; |
---|
193 | |
---|
194 | if (rtems_rootfs_file_append ("/etc/hosts", MKFILE_MODE, 1, bufl) < 0) |
---|
195 | return -1; |
---|
196 | } |
---|
197 | else |
---|
198 | { |
---|
199 | printf ("rootfs hosts rec append, no cname supplied\n"); |
---|
200 | return -1; |
---|
201 | } |
---|
202 | |
---|
203 | return 0; |
---|
204 | } |
---|
205 | |
---|
206 | /* |
---|
207 | * Create a root file system. |
---|
208 | */ |
---|
209 | |
---|
210 | int |
---|
211 | rtems_create_root_fs (void) |
---|
212 | { |
---|
213 | const char *lines[1]; |
---|
214 | int i; |
---|
215 | |
---|
216 | /* |
---|
217 | * Create the directories. |
---|
218 | */ |
---|
219 | |
---|
220 | for (i = 0; |
---|
221 | i < (sizeof (default_directories) / sizeof (rtems_rootfs_dir_table)); |
---|
222 | i++) |
---|
223 | if (rtems_mkdir (default_directories[i].name, |
---|
224 | default_directories[i].mode)) |
---|
225 | return -1; |
---|
226 | |
---|
227 | /* |
---|
228 | * The TCP/IP stack likes this one. If DNS does not work |
---|
229 | * use the host file. |
---|
230 | */ |
---|
231 | |
---|
232 | lines[0] = "hosts,bind\n"; |
---|
233 | |
---|
234 | if (rtems_rootfs_file_append ("/etc/host.conf", MKFILE_MODE, 1, lines)) |
---|
235 | return -1; |
---|
236 | |
---|
237 | /* |
---|
238 | * Create a `/etc/hosts' file. |
---|
239 | */ |
---|
240 | |
---|
241 | if (rtems_rootfs_append_host_rec (htonl (0x7f000001), "localhost", "localdomain")) |
---|
242 | return -1; |
---|
243 | |
---|
244 | return 0; |
---|
245 | } |
---|