1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * public domain -- Dave 'Kill a Cop' Cinege <dcinege@psychosis.com>
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4 | *
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5 | * makedevs
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6 | * Make ranges of device files quickly.
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7 | * known bugs: can't deal with alpha ranges
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8 | */
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9 |
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10 | #include "libbb.h"
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11 |
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12 | #if ENABLE_FEATURE_MAKEDEVS_LEAF
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13 | int makedevs_main(int argc, char **argv);
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14 | int makedevs_main(int argc, char **argv)
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15 | {
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16 | mode_t mode;
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17 | char *basedev, *type, *nodname, buf[255];
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18 | int Smajor, Sminor, S, E;
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19 |
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20 | if (argc < 7 || *argv[1]=='-')
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21 | bb_show_usage();
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22 |
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23 | basedev = argv[1];
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24 | type = argv[2];
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25 | Smajor = xatoi_u(argv[3]);
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26 | Sminor = xatoi_u(argv[4]);
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27 | S = xatoi_u(argv[5]);
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28 | E = xatoi_u(argv[6]);
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29 | nodname = argc == 8 ? basedev : buf;
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30 |
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31 | mode = 0660;
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32 |
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33 | switch (type[0]) {
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34 | case 'c':
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35 | mode |= S_IFCHR;
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36 | break;
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37 | case 'b':
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38 | mode |= S_IFBLK;
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39 | break;
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40 | case 'f':
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41 | mode |= S_IFIFO;
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42 | break;
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43 | default:
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44 | bb_show_usage();
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45 | }
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46 |
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47 | while (S <= E) {
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48 | int sz;
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49 |
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50 | sz = snprintf(buf, sizeof(buf), "%s%d", basedev, S);
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51 | if (sz < 0 || sz >= sizeof(buf)) /* libc different */
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52 | bb_error_msg_and_die("%s too large", basedev);
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53 |
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54 | /* if mode != S_IFCHR and != S_IFBLK third param in mknod() ignored */
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55 |
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56 | if (mknod(nodname, mode, makedev(Smajor, Sminor)))
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57 | bb_error_msg("failed to create: %s", nodname);
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58 |
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59 | if (nodname == basedev) /* ex. /dev/hda - to /dev/hda1 ... */
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60 | nodname = buf;
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61 | S++;
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62 | Sminor++;
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63 | }
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64 |
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65 | return 0;
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66 | }
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67 |
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68 | #elif ENABLE_FEATURE_MAKEDEVS_TABLE
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69 |
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70 | /* Licensed under the GPL v2 or later, see the file LICENSE in this tarball. */
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71 |
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72 | int makedevs_main(int argc, char **argv);
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73 | int makedevs_main(int argc, char **argv)
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74 | {
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75 | FILE *table = stdin;
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76 | char *rootdir = NULL;
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77 | char *line = NULL;
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78 | int linenum = 0;
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79 | int ret = EXIT_SUCCESS;
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80 |
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81 | getopt32(argv, "d:", &line);
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82 | if (line)
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83 | table = xfopen(line, "r");
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84 |
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85 | if (optind >= argc || (rootdir=argv[optind])==NULL) {
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86 | bb_error_msg_and_die("root directory not specified");
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87 | }
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88 |
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89 | xchdir(rootdir);
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90 |
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91 | umask(0);
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92 |
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93 | printf("rootdir=%s\n", rootdir);
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94 | if (line) {
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95 | printf("table='%s'\n", line);
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96 | } else {
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97 | printf("table=<stdin>\n");
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98 | }
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99 |
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100 | while ((line = xmalloc_getline(table))) {
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101 | char type;
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102 | unsigned int mode = 0755;
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103 | unsigned int major = 0;
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104 | unsigned int minor = 0;
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105 | unsigned int count = 0;
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106 | unsigned int increment = 0;
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107 | unsigned int start = 0;
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108 | char name[41];
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109 | char user[41];
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110 | char group[41];
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111 | char *full_name;
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112 | uid_t uid;
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113 | gid_t gid;
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114 |
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115 | linenum++;
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116 |
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117 | if ((2 > sscanf(line, "%40s %c %o %40s %40s %u %u %u %u %u", name,
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118 | &type, &mode, user, group, &major,
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119 | &minor, &start, &increment, &count)) ||
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120 | ((major | minor | start | count | increment) > 255))
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121 | {
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122 | if (*line=='\0' || *line=='#' || isspace(*line))
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123 | continue;
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124 | bb_error_msg("line %d invalid: '%s'", linenum, line);
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125 | ret = EXIT_FAILURE;
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126 | continue;
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127 | }
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128 | if (name[0] == '#') {
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129 | continue;
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130 | }
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131 |
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132 | gid = (*group) ? get_ug_id(group, xgroup2gid) : getgid();
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133 | uid = (*user) ? get_ug_id(user, xuname2uid) : getuid();
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134 | full_name = concat_path_file(rootdir, name);
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135 |
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136 | if (type == 'd') {
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137 | bb_make_directory(full_name, mode | S_IFDIR, FILEUTILS_RECUR);
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138 | if (chown(full_name, uid, gid) == -1) {
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139 | bb_perror_msg("line %d: chown failed for %s", linenum, full_name);
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140 | ret = EXIT_FAILURE;
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141 | goto loop;
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142 | }
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143 | if ((mode != -1) && (chmod(full_name, mode) < 0)){
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144 | bb_perror_msg("line %d: chmod failed for %s", linenum, full_name);
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145 | ret = EXIT_FAILURE;
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146 | goto loop;
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147 | }
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148 | } else if (type == 'f') {
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149 | struct stat st;
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150 | if ((stat(full_name, &st) < 0 || !S_ISREG(st.st_mode))) {
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151 | bb_perror_msg("line %d: regular file '%s' does not exist", linenum, full_name);
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152 | ret = EXIT_FAILURE;
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153 | goto loop;
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154 | }
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155 | if (chown(full_name, uid, gid) == -1) {
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156 | bb_perror_msg("line %d: chown failed for %s", linenum, full_name);
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157 | ret = EXIT_FAILURE;
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158 | goto loop;
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159 | }
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160 | if ((mode != -1) && (chmod(full_name, mode) < 0)){
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161 | bb_perror_msg("line %d: chmod failed for %s", linenum, full_name);
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162 | ret = EXIT_FAILURE;
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163 | goto loop;
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164 | }
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165 | } else {
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166 | dev_t rdev;
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167 |
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168 | if (type == 'p') {
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169 | mode |= S_IFIFO;
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170 | }
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171 | else if (type == 'c') {
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172 | mode |= S_IFCHR;
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173 | }
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174 | else if (type == 'b') {
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175 | mode |= S_IFBLK;
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176 | } else {
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177 | bb_error_msg("line %d: unsupported file type %c", linenum, type);
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178 | ret = EXIT_FAILURE;
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179 | goto loop;
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180 | }
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181 |
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182 | if (count > 0) {
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183 | int i;
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184 | char *full_name_inc;
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185 |
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186 | full_name_inc = xmalloc(strlen(full_name) + 4);
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187 | for (i = start; i < count; i++) {
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188 | sprintf(full_name_inc, "%s%d", full_name, i);
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189 | rdev = makedev(major, minor + (i * increment - start));
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190 | if (mknod(full_name_inc, mode, rdev) == -1) {
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191 | bb_perror_msg("line %d: cannot create node %s", linenum, full_name_inc);
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192 | ret = EXIT_FAILURE;
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193 | }
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194 | else if (chown(full_name_inc, uid, gid) == -1) {
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195 | bb_perror_msg("line %d: chown failed for %s", linenum, full_name_inc);
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196 | ret = EXIT_FAILURE;
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197 | }
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198 | if ((mode != -1) && (chmod(full_name_inc, mode) < 0)){
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199 | bb_perror_msg("line %d: chmod failed for %s", linenum, full_name_inc);
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200 | ret = EXIT_FAILURE;
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201 | }
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202 | }
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203 | free(full_name_inc);
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204 | } else {
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205 | rdev = makedev(major, minor);
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206 | if (mknod(full_name, mode, rdev) == -1) {
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207 | bb_perror_msg("line %d: cannot create node %s", linenum, full_name);
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208 | ret = EXIT_FAILURE;
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209 | }
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210 | else if (chown(full_name, uid, gid) == -1) {
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211 | bb_perror_msg("line %d: chown failed for %s", linenum, full_name);
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212 | ret = EXIT_FAILURE;
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213 | }
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214 | if ((mode != -1) && (chmod(full_name, mode) < 0)){
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215 | bb_perror_msg("line %d: chmod failed for %s", linenum, full_name);
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216 | ret = EXIT_FAILURE;
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217 | }
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218 | }
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219 | }
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220 | loop:
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221 | free(line);
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222 | free(full_name);
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223 | }
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224 | fclose(table);
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225 |
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226 | return ret;
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227 | }
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228 |
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229 | #else
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230 | # error makedevs configuration error, either leaf or table must be selected
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231 | #endif
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