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 | //usage:#if ENABLE_FEATURE_MAKEDEVS_LEAF
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11 | //usage:#define makedevs_trivial_usage
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12 | //usage: "NAME TYPE MAJOR MINOR FIRST LAST [s]"
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13 | //usage:#define makedevs_full_usage "\n\n"
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14 | //usage: "Create a range of block or character special files"
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15 | //usage: "\n"
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16 | //usage: "\nTYPE is:"
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17 | //usage: "\n b Block device"
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18 | //usage: "\n c Character device"
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19 | //usage: "\n f FIFO, MAJOR and MINOR are ignored"
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20 | //usage: "\n"
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21 | //usage: "\nFIRST..LAST specify numbers appended to NAME."
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22 | //usage: "\nIf 's' is the last argument, the base device is created as well."
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23 | //usage: "\n"
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24 | //usage: "\nExamples:"
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25 | //usage: "\n makedevs /dev/ttyS c 4 66 2 63 -> ttyS2-ttyS63"
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26 | //usage: "\n makedevs /dev/hda b 3 0 0 8 s -> hda,hda1-hda8"
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27 | //usage:
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28 | //usage:#define makedevs_example_usage
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29 | //usage: "# makedevs /dev/ttyS c 4 66 2 63\n"
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30 | //usage: "[creates ttyS2-ttyS63]\n"
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31 | //usage: "# makedevs /dev/hda b 3 0 0 8 s\n"
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32 | //usage: "[creates hda,hda1-hda8]\n"
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33 | //usage:#endif
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34 | //usage:
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35 | //usage:#if ENABLE_FEATURE_MAKEDEVS_TABLE
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36 | //usage:#define makedevs_trivial_usage
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37 | //usage: "[-d device_table] rootdir"
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38 | //usage:#define makedevs_full_usage "\n\n"
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39 | //usage: "Create a range of special files as specified in a device table.\n"
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40 | //usage: "Device table entries take the form of:\n"
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41 | //usage: "<name> <type> <mode> <uid> <gid> <major> <minor> <start> <inc> <count>\n"
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42 | //usage: "Where name is the file name, type can be one of:\n"
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43 | //usage: " f Regular file\n"
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44 | //usage: " d Directory\n"
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45 | //usage: " c Character device\n"
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46 | //usage: " b Block device\n"
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47 | //usage: " p Fifo (named pipe)\n"
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48 | //usage: "uid is the user id for the target file, gid is the group id for the\n"
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49 | //usage: "target file. The rest of the entries (major, minor, etc) apply to\n"
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50 | //usage: "to device special files. A '-' may be used for blank entries."
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51 | //usage:
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52 | //usage:#define makedevs_example_usage
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53 | //usage: "For example:\n"
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54 | //usage: "<name> <type> <mode><uid><gid><major><minor><start><inc><count>\n"
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55 | //usage: "/dev d 755 0 0 - - - - -\n"
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56 | //usage: "/dev/console c 666 0 0 5 1 - - -\n"
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57 | //usage: "/dev/null c 666 0 0 1 3 0 0 -\n"
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58 | //usage: "/dev/zero c 666 0 0 1 5 0 0 -\n"
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59 | //usage: "/dev/hda b 640 0 0 3 0 0 0 -\n"
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60 | //usage: "/dev/hda b 640 0 0 3 1 1 1 15\n\n"
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61 | //usage: "Will Produce:\n"
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62 | //usage: "/dev\n"
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63 | //usage: "/dev/console\n"
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64 | //usage: "/dev/null\n"
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65 | //usage: "/dev/zero\n"
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66 | //usage: "/dev/hda\n"
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67 | //usage: "/dev/hda[0-15]\n"
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68 | //usage:#endif
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69 |
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70 | #include "libbb.h"
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71 |
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72 | #if ENABLE_FEATURE_MAKEDEVS_LEAF
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73 | /*
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74 | makedevs NAME TYPE MAJOR MINOR FIRST LAST [s]
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75 | TYPEs:
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76 | b Block device
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77 | c Character device
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78 | f FIFO
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79 |
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80 | FIRST..LAST specify numbers appended to NAME.
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81 | If 's' is the last argument, the base device is created as well.
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82 | Examples:
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83 | makedevs /dev/ttyS c 4 66 2 63 -> ttyS2-ttyS63
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84 | makedevs /dev/hda b 3 0 0 8 s -> hda,hda1-hda8
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85 | */
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86 | int makedevs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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87 | int makedevs_main(int argc, char **argv)
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88 | {
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89 | mode_t mode;
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90 | char *basedev, *type, *nodname, *buf;
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91 | int Smajor, Sminor, S, E;
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92 |
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93 | if (argc < 7 || argv[1][0] == '-')
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94 | bb_show_usage();
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95 |
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96 | basedev = argv[1];
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97 | buf = xasprintf("%s%u", argv[1], (unsigned)-1);
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98 | type = argv[2];
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99 | Smajor = xatoi_positive(argv[3]);
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100 | Sminor = xatoi_positive(argv[4]);
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101 | S = xatoi_positive(argv[5]);
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102 | E = xatoi_positive(argv[6]);
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103 | nodname = argv[7] ? basedev : buf;
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104 |
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105 | mode = 0660;
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106 | switch (type[0]) {
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107 | case 'c':
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108 | mode |= S_IFCHR;
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109 | break;
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110 | case 'b':
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111 | mode |= S_IFBLK;
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112 | break;
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113 | case 'f':
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114 | mode |= S_IFIFO;
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115 | break;
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116 | default:
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117 | bb_show_usage();
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118 | }
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119 |
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120 | while (S <= E) {
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121 | sprintf(buf, "%s%u", basedev, S);
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122 |
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123 | /* if mode != S_IFCHR and != S_IFBLK,
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124 | * third param in mknod() ignored */
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125 | if (mknod(nodname, mode, makedev(Smajor, Sminor)))
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126 | bb_perror_msg("can't create '%s'", nodname);
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127 |
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128 | /*if (nodname == basedev)*/ /* ex. /dev/hda - to /dev/hda1 ... */
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129 | nodname = buf;
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130 | S++;
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131 | Sminor++;
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132 | }
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133 |
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134 | return 0;
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135 | }
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136 |
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137 | #elif ENABLE_FEATURE_MAKEDEVS_TABLE
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138 |
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139 | /* Licensed under GPLv2 or later, see file LICENSE in this source tree. */
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140 |
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141 | int makedevs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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142 | int makedevs_main(int argc UNUSED_PARAM, char **argv)
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143 | {
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144 | parser_t *parser;
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145 | char *line = (char *)"-";
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146 | int ret = EXIT_SUCCESS;
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147 |
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148 | opt_complementary = "=1"; /* exactly one param */
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149 | getopt32(argv, "d:", &line);
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150 | argv += optind;
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151 |
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152 | xchdir(*argv); /* ensure root dir exists */
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153 |
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154 | umask(0);
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155 |
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156 | printf("rootdir=%s\ntable=", *argv);
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157 | if (NOT_LONE_DASH(line)) {
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158 | printf("'%s'\n", line);
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159 | } else {
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160 | puts("<stdin>");
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161 | }
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162 |
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163 | parser = config_open(line);
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164 | while (config_read(parser, &line, 1, 1, "# \t", PARSE_NORMAL)) {
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165 | int linenum;
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166 | char type;
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167 | unsigned mode = 0755;
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168 | unsigned major = 0;
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169 | unsigned minor = 0;
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170 | unsigned count = 0;
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171 | unsigned increment = 0;
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172 | unsigned start = 0;
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173 | char name[41];
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174 | char user[41];
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175 | char group[41];
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176 | char *full_name = name;
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177 | uid_t uid;
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178 | gid_t gid;
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179 |
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180 | linenum = parser->lineno;
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181 |
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182 | if ((2 > sscanf(line, "%40s %c %o %40s %40s %u %u %u %u %u",
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183 | name, &type, &mode, user, group,
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184 | &major, &minor, &start, &increment, &count))
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185 | || ((unsigned)(major | minor | start | count | increment) > 255)
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186 | ) {
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187 | bb_error_msg("invalid line %d: '%s'", linenum, line);
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188 | ret = EXIT_FAILURE;
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189 | continue;
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190 | }
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191 |
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192 | gid = (*group) ? get_ug_id(group, xgroup2gid) : getgid();
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193 | uid = (*user) ? get_ug_id(user, xuname2uid) : getuid();
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194 | /* We are already in the right root dir,
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195 | * so make absolute paths relative */
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196 | if ('/' == *full_name)
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197 | full_name++;
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198 |
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199 | if (type == 'd') {
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200 | bb_make_directory(full_name, mode | S_IFDIR, FILEUTILS_RECUR);
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201 | if (chown(full_name, uid, gid) == -1) {
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202 | chown_fail:
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203 | bb_perror_msg("line %d: can't chown %s", linenum, full_name);
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204 | ret = EXIT_FAILURE;
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205 | continue;
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206 | }
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207 | if (chmod(full_name, mode) < 0) {
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208 | chmod_fail:
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209 | bb_perror_msg("line %d: can't chmod %s", linenum, full_name);
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210 | ret = EXIT_FAILURE;
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211 | continue;
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212 | }
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213 | } else if (type == 'f') {
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214 | struct stat st;
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215 | if ((stat(full_name, &st) < 0 || !S_ISREG(st.st_mode))) {
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216 | bb_perror_msg("line %d: regular file '%s' does not exist", linenum, full_name);
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217 | ret = EXIT_FAILURE;
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218 | continue;
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219 | }
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220 | if (chown(full_name, uid, gid) < 0)
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221 | goto chown_fail;
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222 | if (chmod(full_name, mode) < 0)
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223 | goto chmod_fail;
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224 | } else {
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225 | dev_t rdev;
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226 | unsigned i;
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227 | char *full_name_inc;
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228 |
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229 | if (type == 'p') {
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230 | mode |= S_IFIFO;
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231 | } else if (type == 'c') {
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232 | mode |= S_IFCHR;
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233 | } else if (type == 'b') {
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234 | mode |= S_IFBLK;
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235 | } else {
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236 | bb_error_msg("line %d: unsupported file type %c", linenum, type);
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237 | ret = EXIT_FAILURE;
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238 | continue;
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239 | }
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240 |
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241 | full_name_inc = xmalloc(strlen(full_name) + sizeof(int)*3 + 2);
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242 | if (count)
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243 | count--;
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244 | for (i = start; i <= start + count; i++) {
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245 | sprintf(full_name_inc, count ? "%s%u" : "%s", full_name, i);
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246 | rdev = makedev(major, minor + (i - start) * increment);
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247 | if (mknod(full_name_inc, mode, rdev) < 0) {
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248 | bb_perror_msg("line %d: can't create node %s", linenum, full_name_inc);
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249 | ret = EXIT_FAILURE;
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250 | } else if (chown(full_name_inc, uid, gid) < 0) {
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251 | bb_perror_msg("line %d: can't chown %s", linenum, full_name_inc);
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252 | ret = EXIT_FAILURE;
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253 | } else if (chmod(full_name_inc, mode) < 0) {
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254 | bb_perror_msg("line %d: can't chmod %s", linenum, full_name_inc);
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255 | ret = EXIT_FAILURE;
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256 | }
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257 | }
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258 | free(full_name_inc);
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259 | }
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260 | }
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261 | if (ENABLE_FEATURE_CLEAN_UP)
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262 | config_close(parser);
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263 |
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264 | return ret;
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265 | }
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266 |
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267 | #else
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268 | # error makedevs configuration error, either leaf or table must be selected
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269 | #endif
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