1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * Copyright (C) 2003 by Glenn McGrath
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4 | * SELinux support: by Yuichi Nakamura <ynakam@hitachisoft.jp>
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5 | *
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6 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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7 | */
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8 |
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9 | #include "libbb.h"
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10 | #include "libcoreutils/coreutils.h"
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11 |
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12 | #if ENABLE_FEATURE_INSTALL_LONG_OPTIONS
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13 | static const char install_longopts[] ALIGN1 =
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14 | "directory\0" No_argument "d"
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15 | "preserve-timestamps\0" No_argument "p"
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16 | "strip\0" No_argument "s"
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17 | "group\0" Required_argument "g"
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18 | "mode\0" Required_argument "m"
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19 | "owner\0" Required_argument "o"
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20 | /* autofs build insists of using -b --suffix=.orig */
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21 | /* TODO? (short option for --suffix is -S) */
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22 | #if ENABLE_SELINUX
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23 | "context\0" Required_argument "Z"
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24 | "preserve_context\0" No_argument "\xff"
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25 | "preserve-context\0" No_argument "\xff"
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26 | #endif
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27 | ;
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28 | #endif
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29 |
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30 |
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31 | #if ENABLE_SELINUX
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32 | static void setdefaultfilecon(const char *path)
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33 | {
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34 | struct stat s;
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35 | security_context_t scontext = NULL;
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36 |
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37 | if (!is_selinux_enabled()) {
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38 | return;
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39 | }
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40 | if (lstat(path, &s) != 0) {
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41 | return;
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42 | }
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43 |
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44 | if (matchpathcon(path, s.st_mode, &scontext) < 0) {
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45 | goto out;
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46 | }
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47 | if (strcmp(scontext, "<<none>>") == 0) {
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48 | goto out;
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49 | }
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50 |
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51 | if (lsetfilecon(path, scontext) < 0) {
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52 | if (errno != ENOTSUP) {
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53 | bb_perror_msg("warning: can't change context"
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54 | " of %s to %s", path, scontext);
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55 | }
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56 | }
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57 |
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58 | out:
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59 | freecon(scontext);
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60 | }
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61 |
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62 | #endif
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63 |
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64 | int install_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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65 | int install_main(int argc, char **argv)
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66 | {
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67 | struct stat statbuf;
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68 | mode_t mode;
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69 | uid_t uid;
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70 | gid_t gid;
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71 | char *arg, *last;
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72 | const char *gid_str;
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73 | const char *uid_str;
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74 | const char *mode_str;
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75 | int copy_flags = FILEUTILS_DEREFERENCE | FILEUTILS_FORCE;
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76 | int opts;
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77 | int min_args = 1;
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78 | int ret = EXIT_SUCCESS;
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79 | int isdir = 0;
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80 | #if ENABLE_SELINUX
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81 | security_context_t scontext;
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82 | bool use_default_selinux_context = 1;
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83 | #endif
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84 | enum {
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85 | OPT_c = 1 << 0,
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86 | OPT_v = 1 << 1,
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87 | OPT_b = 1 << 2,
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88 | OPT_MKDIR_LEADING = 1 << 3,
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89 | OPT_DIRECTORY = 1 << 4,
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90 | OPT_PRESERVE_TIME = 1 << 5,
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91 | OPT_STRIP = 1 << 6,
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92 | OPT_GROUP = 1 << 7,
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93 | OPT_MODE = 1 << 8,
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94 | OPT_OWNER = 1 << 9,
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95 | #if ENABLE_SELINUX
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96 | OPT_SET_SECURITY_CONTEXT = 1 << 10,
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97 | OPT_PRESERVE_SECURITY_CONTEXT = 1 << 11,
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98 | #endif
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99 | };
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100 |
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101 | #if ENABLE_FEATURE_INSTALL_LONG_OPTIONS
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102 | applet_long_options = install_longopts;
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103 | #endif
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104 | opt_complementary = "s--d:d--s" IF_FEATURE_INSTALL_LONG_OPTIONS(IF_SELINUX(":Z--\xff:\xff--Z"));
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105 | /* -c exists for backwards compatibility, it's needed */
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106 | /* -v is ignored ("print name of each created directory") */
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107 | /* -b is ignored ("make a backup of each existing destination file") */
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108 | opts = getopt32(argv, "cvb" "Ddpsg:m:o:" IF_SELINUX("Z:"),
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109 | &gid_str, &mode_str, &uid_str IF_SELINUX(, &scontext));
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110 | argc -= optind;
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111 | argv += optind;
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112 |
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113 | #if ENABLE_SELINUX
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114 | if (opts & (OPT_PRESERVE_SECURITY_CONTEXT|OPT_SET_SECURITY_CONTEXT)) {
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115 | selinux_or_die();
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116 | use_default_selinux_context = 0;
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117 | if (opts & OPT_PRESERVE_SECURITY_CONTEXT) {
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118 | copy_flags |= FILEUTILS_PRESERVE_SECURITY_CONTEXT;
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119 | }
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120 | if (opts & OPT_SET_SECURITY_CONTEXT) {
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121 | setfscreatecon_or_die(scontext);
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122 | copy_flags |= FILEUTILS_SET_SECURITY_CONTEXT;
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123 | }
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124 | }
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125 | #endif
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126 |
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127 | /* preserve access and modification time, this is GNU behaviour,
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128 | * BSD only preserves modification time */
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129 | if (opts & OPT_PRESERVE_TIME) {
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130 | copy_flags |= FILEUTILS_PRESERVE_STATUS;
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131 | }
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132 | mode = 0755; /* GNU coreutils 6.10 compat */
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133 | if (opts & OPT_MODE)
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134 | bb_parse_mode(mode_str, &mode);
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135 | uid = (opts & OPT_OWNER) ? get_ug_id(uid_str, xuname2uid) : getuid();
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136 | gid = (opts & OPT_GROUP) ? get_ug_id(gid_str, xgroup2gid) : getgid();
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137 |
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138 | last = argv[argc - 1];
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139 | if (!(opts & OPT_DIRECTORY)) {
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140 | argv[argc - 1] = NULL;
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141 | min_args++;
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142 |
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143 | /* coreutils install resolves link in this case, don't use lstat */
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144 | isdir = stat(last, &statbuf) < 0 ? 0 : S_ISDIR(statbuf.st_mode);
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145 | }
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146 |
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147 | if (argc < min_args)
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148 | bb_show_usage();
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149 |
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150 | while ((arg = *argv++) != NULL) {
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151 | char *dest = last;
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152 | if (opts & OPT_DIRECTORY) {
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153 | dest = arg;
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154 | /* GNU coreutils 6.9 does not set uid:gid
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155 | * on intermediate created directories
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156 | * (only on last one) */
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157 | if (bb_make_directory(dest, 0755, FILEUTILS_RECUR)) {
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158 | ret = EXIT_FAILURE;
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159 | goto next;
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160 | }
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161 | } else {
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162 | if (opts & OPT_MKDIR_LEADING) {
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163 | char *ddir = xstrdup(dest);
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164 | bb_make_directory(dirname(ddir), 0755, FILEUTILS_RECUR);
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165 | /* errors are not checked. copy_file
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166 | * will fail if dir is not created. */
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167 | free(ddir);
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168 | }
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169 | if (isdir)
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170 | dest = concat_path_file(last, bb_basename(arg));
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171 | if (copy_file(arg, dest, copy_flags) != 0) {
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172 | /* copy is not made */
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173 | ret = EXIT_FAILURE;
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174 | goto next;
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175 | }
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176 | if (opts & OPT_STRIP) {
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177 | char *args[4];
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178 | args[0] = (char*)"strip";
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179 | args[1] = (char*)"-p"; /* -p --preserve-dates */
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180 | args[2] = dest;
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181 | args[3] = NULL;
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182 | if (spawn_and_wait(args)) {
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183 | bb_perror_msg("strip");
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184 | ret = EXIT_FAILURE;
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185 | }
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186 | }
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187 | }
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188 |
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189 | /* Set the file mode (always, not only with -m).
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190 | * GNU coreutils 6.10 is not affected by umask. */
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191 | if (chmod(dest, mode) == -1) {
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192 | bb_perror_msg("can't change %s of %s", "permissions", dest);
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193 | ret = EXIT_FAILURE;
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194 | }
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195 | #if ENABLE_SELINUX
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196 | if (use_default_selinux_context)
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197 | setdefaultfilecon(dest);
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198 | #endif
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199 | /* Set the user and group id */
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200 | if ((opts & (OPT_OWNER|OPT_GROUP))
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201 | && lchown(dest, uid, gid) == -1
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202 | ) {
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203 | bb_perror_msg("can't change %s of %s", "ownership", dest);
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204 | ret = EXIT_FAILURE;
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205 | }
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206 | next:
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207 | if (ENABLE_FEATURE_CLEAN_UP && isdir)
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208 | free(dest);
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209 | }
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210 |
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211 | return ret;
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212 | }
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