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    Contents of /trunk/mkinitrd-magellan/busybox/miscutils/makedevs.c

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    Revision 532 - (show annotations) (download)
    Sat Sep 1 22:45:15 2007 UTC (16 years, 8 months ago) by niro
    File MIME type: text/plain
    File size: 5573 byte(s) 
    -import if magellan mkinitrd; it is a fork of redhats mkinitrd-5.0.8 with all magellan patches and features; deprecates magellan-src/mkinitrd
    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 "busybox.h"
    11
    12 #ifdef CONFIG_FEATURE_MAKEDEVS_LEAF
    13 int makedevs_main(int argc, char **argv)
    14 {
    15 mode_t mode;
    16 char *basedev, *type, *nodname, buf[255];
    17 int Smajor, Sminor, S, E;
    18
    19 if (argc < 7 || *argv[1]=='-')
    20 bb_show_usage();
    21
    22 basedev = argv[1];
    23 type = argv[2];
    24 Smajor = xatoi_u(argv[3]);
    25 Sminor = xatoi_u(argv[4]);
    26 S = xatoi_u(argv[5]);
    27 E = xatoi_u(argv[6]);
    28 nodname = argc == 8 ? basedev : buf;
    29
    30 mode = 0660;
    31
    32 switch (type[0]) {
    33 case 'c':
    34 mode |= S_IFCHR;
    35 break;
    36 case 'b':
    37 mode |= S_IFBLK;
    38 break;
    39 case 'f':
    40 mode |= S_IFIFO;
    41 break;
    42 default:
    43 bb_show_usage();
    44 }
    45
    46 while (S <= E) {
    47 int sz;
    48
    49 sz = snprintf(buf, sizeof(buf), "%s%d", basedev, S);
    50 if(sz<0 || sz>=sizeof(buf)) /* libc different */
    51 bb_error_msg_and_die("%s too large", basedev);
    52
    53 /* if mode != S_IFCHR and != S_IFBLK third param in mknod() ignored */
    54
    55 if (mknod(nodname, mode, makedev(Smajor, Sminor)))
    56 bb_error_msg("failed to create: %s", nodname);
    57
    58 if (nodname == basedev) /* ex. /dev/hda - to /dev/hda1 ... */
    59 nodname = buf;
    60 S++;
    61 Sminor++;
    62 }
    63
    64 return 0;
    65 }
    66
    67 #elif defined CONFIG_FEATURE_MAKEDEVS_TABLE
    68
    69 /* Licensed under the GPL v2 or later, see the file LICENSE in this tarball. */
    70
    71 int makedevs_main(int argc, char **argv)
    72 {
    73 FILE *table = stdin;
    74 char *rootdir = NULL;
    75 char *line = NULL;
    76 int linenum = 0;
    77 int ret = EXIT_SUCCESS;
    78
    79 getopt32(argc, argv, "d:", &line);
    80 if (line)
    81 table = xfopen(line, "r");
    82
    83 if (optind >= argc || (rootdir=argv[optind])==NULL) {
    84 bb_error_msg_and_die("root directory not specified");
    85 }
    86
    87 xchdir(rootdir);
    88
    89 umask(0);
    90
    91 printf("rootdir=%s\n", rootdir);
    92 if (line) {
    93 printf("table='%s'\n", line);
    94 } else {
    95 printf("table=<stdin>\n");
    96 }
    97
    98 while ((line = xmalloc_getline(table))) {
    99 char type;
    100 unsigned int mode = 0755;
    101 unsigned int major = 0;
    102 unsigned int minor = 0;
    103 unsigned int count = 0;
    104 unsigned int increment = 0;
    105 unsigned int start = 0;
    106 char name[41];
    107 char user[41];
    108 char group[41];
    109 char *full_name;
    110 uid_t uid;
    111 gid_t gid;
    112
    113 linenum++;
    114
    115 if ((2 > sscanf(line, "%40s %c %o %40s %40s %u %u %u %u %u", name,
    116 &type, &mode, user, group, &major,
    117 &minor, &start, &increment, &count)) ||
    118 ((major | minor | start | count | increment) > 255))
    119 {
    120 if (*line=='\0' || *line=='#' || isspace(*line))
    121 continue;
    122 bb_error_msg("line %d invalid: '%s'", linenum, line);
    123 ret = EXIT_FAILURE;
    124 continue;
    125 }
    126 if (name[0] == '#') {
    127 continue;
    128 }
    129
    130 gid = (*group) ? get_ug_id(group, xgroup2gid) : getgid();
    131 uid = (*user) ? get_ug_id(user, xuname2uid) : getuid();
    132 full_name = concat_path_file(rootdir, name);
    133
    134 if (type == 'd') {
    135 bb_make_directory(full_name, mode | S_IFDIR, FILEUTILS_RECUR);
    136 if (chown(full_name, uid, gid) == -1) {
    137 bb_perror_msg("line %d: chown failed for %s", linenum, full_name);
    138 ret = EXIT_FAILURE;
    139 goto loop;
    140 }
    141 if ((mode != -1) && (chmod(full_name, mode) < 0)){
    142 bb_perror_msg("line %d: chmod failed for %s", linenum, full_name);
    143 ret = EXIT_FAILURE;
    144 goto loop;
    145 }
    146 } else if (type == 'f') {
    147 struct stat st;
    148 if ((stat(full_name, &st) < 0 || !S_ISREG(st.st_mode))) {
    149 bb_perror_msg("line %d: regular file '%s' does not exist", linenum, full_name);
    150 ret = EXIT_FAILURE;
    151 goto loop;
    152 }
    153 if (chown(full_name, uid, gid) == -1) {
    154 bb_perror_msg("line %d: chown failed for %s", linenum, full_name);
    155 ret = EXIT_FAILURE;
    156 goto loop;
    157 }
    158 if ((mode != -1) && (chmod(full_name, mode) < 0)){
    159 bb_perror_msg("line %d: chmod failed for %s", linenum, full_name);
    160 ret = EXIT_FAILURE;
    161 goto loop;
    162 }
    163 } else
    164 {
    165 dev_t rdev;
    166
    167 if (type == 'p') {
    168 mode |= S_IFIFO;
    169 }
    170 else if (type == 'c') {
    171 mode |= S_IFCHR;
    172 }
    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 goto loop;
    179 }
    180
    181 if (count > 0) {
    182 int i;
    183 char *full_name_inc;
    184
    185 full_name_inc = xmalloc(strlen(full_name) + 4);
    186 for (i = start; i < count; i++) {
    187 sprintf(full_name_inc, "%s%d", full_name, i);
    188 rdev = (major << 8) + minor + (i * increment - start);
    189 if (mknod(full_name_inc, mode, rdev) == -1) {
    190 bb_perror_msg("line %d: cannot create node %s", linenum, full_name_inc);
    191 ret = EXIT_FAILURE;
    192 }
    193 else if (chown(full_name_inc, uid, gid) == -1) {
    194 bb_perror_msg("line %d: chown failed for %s", linenum, full_name_inc);
    195 ret = EXIT_FAILURE;
    196 }
    197 if ((mode != -1) && (chmod(full_name_inc, mode) < 0)){
    198 bb_perror_msg("line %d: chmod failed for %s", linenum, 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("line %d: cannot create node %s", linenum, full_name);
    207 ret = EXIT_FAILURE;
    208 }
    209 else if (chown(full_name, uid, gid) == -1) {
    210 bb_perror_msg("line %d: chown failed for %s", linenum, full_name);
    211 ret = EXIT_FAILURE;
    212 }
    213 if ((mode != -1) && (chmod(full_name, mode) < 0)){
    214 bb_perror_msg("line %d: chmod failed for %s", linenum, full_name);
    215 ret = EXIT_FAILURE;
    216 }
    217 }
    218 }
    219 loop:
    220 free(line);
    221 free(full_name);
    222 }
    223 fclose(table);
    224
    225 return ret;
    226 }
    227
    228 #else
    229 # error makedevs configuration error, either leaf or table must be selected
    230 #endif