[d34d2e69] | 1 | /* |
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| 2 | ------------------------------------------------------------------------ |
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| 3 | $Id$ |
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| 4 | ------------------------------------------------------------------------ |
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[429ba3b] | 5 | |
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[d34d2e69] | 6 | Copyright Cybertec Pty Ltd, 2000 |
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| 7 | All rights reserved Cybertec Pty Ltd, 2000 |
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| 8 | |
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| 9 | COPYRIGHT (c) 1989-1998. |
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| 10 | On-Line Applications Research Corporation (OAR). |
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| 11 | |
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| 12 | The license and distribution terms for this file may be |
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| 13 | found in the file LICENSE in this distribution or at |
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[429ba3b] | 14 | |
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[7aa5175] | 15 | http://www.rtems.com/license/LICENSE. |
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[d34d2e69] | 16 | |
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| 17 | This software with is provided ``as is'' and with NO WARRANTY. |
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| 18 | |
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| 19 | ------------------------------------------------------------------------ |
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| 20 | |
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| 21 | Set of helpers when creating a root file system. The root filesystem |
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| 22 | in RTEMS is the In Memory Filesystem (IMFS). We could copy an exiting |
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| 23 | filesystem to here, how-ever a number of files can have target |
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| 24 | specific initialisation info which we need to write. |
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[429ba3b] | 25 | |
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[d34d2e69] | 26 | */ |
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| 27 | |
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[4aa8a23] | 28 | #if HAVE_CONFIG_H |
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| 29 | #include "config.h" |
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| 30 | #endif |
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| 31 | |
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[d34d2e69] | 32 | #include <errno.h> |
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| 33 | #include <stdio.h> |
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| 34 | #include <string.h> |
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| 35 | #include <sys/stat.h> |
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| 36 | #include <sys/types.h> |
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| 37 | #include <fcntl.h> |
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| 38 | #include <unistd.h> |
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| 39 | #include <sys/socket.h> |
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| 40 | #include <netinet/in.h> |
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| 41 | #include <arpa/inet.h> |
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| 42 | |
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| 43 | #include <rtems/mkrootfs.h> |
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| 44 | |
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| 45 | /* |
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| 46 | * A table a list of names and their modes. |
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| 47 | */ |
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| 48 | |
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| 49 | typedef struct rtems_rootfs_dir_table |
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| 50 | { |
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| 51 | const char *name; |
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| 52 | int mode; |
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| 53 | } rtems_rootfs_dir_table; |
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| 54 | |
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| 55 | /* |
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| 56 | * Table of directorys to make. |
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| 57 | */ |
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| 58 | |
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| 59 | static const rtems_rootfs_dir_table default_directories[] = |
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| 60 | { |
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| 61 | { "/bin", S_IFDIR | S_IRWXU | S_IXGRP | S_IRGRP | S_IROTH | S_IXOTH }, |
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| 62 | { "/etc", S_IFDIR | S_IRWXU | S_IXGRP | S_IRGRP | S_IROTH | S_IXOTH }, |
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| 63 | { "/dev", S_IFDIR | S_IRWXU | S_IXGRP | S_IRGRP | S_IROTH | S_IXOTH }, |
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| 64 | { "/usr/bin", S_IFDIR | S_IRWXU | S_IXGRP | S_IRGRP | S_IROTH | S_IXOTH } |
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| 65 | }; |
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| 66 | |
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| 67 | #define MKFILE_MODE (S_IRUSR | S_IWUSR | S_IWGRP | S_IRGRP | S_IROTH) |
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| 68 | #define MKDIR_MODE (S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) |
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| 69 | |
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| 70 | /* |
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| 71 | * Create enough files to support the networking stack. |
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| 72 | * Points to a table of strings. |
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| 73 | */ |
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| 74 | |
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| 75 | int |
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| 76 | rtems_rootfs_file_append (const char *file, |
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| 77 | mode_t omode, |
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| 78 | const int line_cnt, |
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| 79 | const char **lines) |
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| 80 | { |
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| 81 | struct stat sb; |
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| 82 | int fd; |
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| 83 | int i; |
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| 84 | |
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| 85 | /* |
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| 86 | * See is a file exists. If it does not, create the |
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| 87 | * file and the path to the file. |
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| 88 | */ |
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| 89 | |
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| 90 | fd = -1; |
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[429ba3b] | 91 | |
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[d34d2e69] | 92 | if (stat(file, &sb)) |
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| 93 | { |
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| 94 | if (errno == ENOENT) |
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| 95 | { |
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| 96 | /* |
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| 97 | * Get the path to the file if one exists and create the |
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| 98 | * path. If it exists nothing happens. |
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| 99 | */ |
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| 100 | |
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| 101 | int i = strlen (file); |
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| 102 | |
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| 103 | while (i) |
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| 104 | { |
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| 105 | if (file[i] == '/') |
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| 106 | { |
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| 107 | char path[128]; |
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| 108 | |
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| 109 | if (i >= sizeof path) |
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| 110 | { |
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| 111 | printf ("root fs, path too long `%s'\n", file); |
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| 112 | return -1; |
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| 113 | } |
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| 114 | |
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| 115 | strncpy (path, file, i); |
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| 116 | path[i] = '\0'; |
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[429ba3b] | 117 | |
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[615d8cc] | 118 | if (rtems_mkdir (path, MKDIR_MODE)) |
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[d34d2e69] | 119 | return -1; |
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| 120 | break; |
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| 121 | } |
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| 122 | i--; |
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| 123 | } |
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[429ba3b] | 124 | |
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[d34d2e69] | 125 | if ((fd = open (file, O_CREAT | O_APPEND | O_WRONLY, omode)) < 0) |
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| 126 | { |
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| 127 | printf ("root fs, cannot create file `%s' : %s\n", |
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| 128 | file, strerror (errno)); |
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| 129 | return -1; |
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| 130 | } |
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| 131 | } |
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| 132 | } |
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| 133 | |
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| 134 | if (fd < 0) |
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| 135 | { |
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| 136 | if ((fd = open (file, O_APPEND | O_WRONLY)) < 0) |
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| 137 | { |
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| 138 | printf ("root fs, cannot open file `%s' : %s\n", |
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| 139 | file, strerror (errno)); |
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| 140 | return -1; |
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| 141 | } |
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| 142 | } |
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[429ba3b] | 143 | |
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[d34d2e69] | 144 | for (i = 0; i < line_cnt; i++) |
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| 145 | { |
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| 146 | int len = strlen (lines[i]); |
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| 147 | |
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| 148 | if (len) |
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| 149 | { |
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| 150 | if (write (fd, lines[i], strlen (lines[i])) < 0) |
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| 151 | { |
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| 152 | close (fd); |
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| 153 | printf ("root fs, cannot write to `%s' : %s\n", |
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| 154 | file, strerror (errno)); |
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| 155 | return -1; |
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| 156 | } |
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| 157 | } |
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| 158 | } |
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[429ba3b] | 159 | |
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[d34d2e69] | 160 | return close (fd); |
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| 161 | } |
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| 162 | |
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| 163 | /* |
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| 164 | * Write hosts record. |
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| 165 | */ |
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| 166 | |
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| 167 | int |
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[64b287e3] | 168 | rtems_rootfs_append_host_rec (in_addr_t cip, |
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[d34d2e69] | 169 | const char *cname, |
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| 170 | const char *dname) |
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| 171 | { |
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| 172 | char buf[128]; |
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| 173 | char *bufp = buf; |
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| 174 | const char *bufl[1]; |
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| 175 | struct in_addr ip; |
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| 176 | |
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| 177 | ip.s_addr = cip; |
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[429ba3b] | 178 | |
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[d34d2e69] | 179 | if (cname && strlen (cname)) |
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| 180 | { |
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| 181 | snprintf (bufp, sizeof (buf), "%s\t\t%s", inet_ntoa (ip), cname); |
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| 182 | bufp += strlen (buf); |
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| 183 | |
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| 184 | if (dname && strlen (dname)) |
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| 185 | { |
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| 186 | snprintf (bufp, sizeof (buf), "\t\t%s.%s", cname, dname); |
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| 187 | bufp += strlen (buf); |
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| 188 | } |
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[429ba3b] | 189 | |
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[d34d2e69] | 190 | strcat (buf, "\n"); |
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[429ba3b] | 191 | |
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[d34d2e69] | 192 | bufl[0] = buf; |
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[429ba3b] | 193 | |
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[d34d2e69] | 194 | if (rtems_rootfs_file_append ("/etc/hosts", MKFILE_MODE, 1, bufl) < 0) |
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| 195 | return -1; |
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| 196 | } |
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| 197 | else |
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| 198 | { |
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| 199 | printf ("rootfs hosts rec append, no cname supplied\n"); |
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| 200 | return -1; |
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| 201 | } |
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| 202 | |
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| 203 | return 0; |
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| 204 | } |
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| 205 | |
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| 206 | /* |
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| 207 | * Create a root file system. |
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| 208 | */ |
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| 209 | |
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| 210 | int |
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[e386ad72] | 211 | rtems_create_root_fs (void) |
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[d34d2e69] | 212 | { |
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| 213 | const char *lines[1]; |
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| 214 | int i; |
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[429ba3b] | 215 | |
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[d34d2e69] | 216 | /* |
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| 217 | * Create the directories. |
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| 218 | */ |
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| 219 | |
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| 220 | for (i = 0; |
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| 221 | i < (sizeof (default_directories) / sizeof (rtems_rootfs_dir_table)); |
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| 222 | i++) |
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[615d8cc] | 223 | if (rtems_mkdir (default_directories[i].name, |
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[d34d2e69] | 224 | default_directories[i].mode)) |
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| 225 | return -1; |
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| 226 | |
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| 227 | /* |
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| 228 | * The TCP/IP stack likes this one. If DNS does not work |
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| 229 | * use the host file. |
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| 230 | */ |
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[429ba3b] | 231 | |
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[d34d2e69] | 232 | lines[0] = "hosts,bind\n"; |
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[429ba3b] | 233 | |
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[d34d2e69] | 234 | if (rtems_rootfs_file_append ("/etc/host.conf", MKFILE_MODE, 1, lines)) |
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| 235 | return -1; |
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[429ba3b] | 236 | |
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[d34d2e69] | 237 | /* |
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| 238 | * Create a `/etc/hosts' file. |
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| 239 | */ |
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| 240 | |
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[42c4de8] | 241 | if (rtems_rootfs_append_host_rec (htonl (0x7f000001), "localhost", "localdomain")) |
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[d34d2e69] | 242 | return -1; |
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[429ba3b] | 243 | |
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[d34d2e69] | 244 | return 0; |
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| 245 | } |
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