1 | /* $NetBSD: cp.c,v 1.39 2005/10/24 12:59:07 kleink Exp $ */ |
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2 | |
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3 | /* |
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4 | * Copyright (c) 1988, 1993, 1994 |
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5 | * The Regents of the University of California. All rights reserved. |
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6 | * |
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7 | * This code is derived from software contributed to Berkeley by |
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8 | * David Hitz of Auspex Systems Inc. |
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9 | * |
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10 | * Redistribution and use in source and binary forms, with or without |
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11 | * modification, are permitted provided that the following conditions |
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12 | * are met: |
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13 | * 1. Redistributions of source code must retain the above copyright |
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14 | * notice, this list of conditions and the following disclaimer. |
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15 | * 2. Redistributions in binary form must reproduce the above copyright |
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16 | * notice, this list of conditions and the following disclaimer in the |
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17 | * documentation and/or other materials provided with the distribution. |
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18 | * 3. Neither the name of the University nor the names of its contributors |
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19 | * may be used to endorse or promote products derived from this software |
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20 | * without specific prior written permission. |
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21 | * |
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22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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32 | * SUCH DAMAGE. |
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33 | */ |
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34 | |
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35 | #ifdef HAVE_CONFIG_H |
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36 | #include "config.h" |
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37 | #endif |
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38 | |
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39 | #if 0 |
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40 | #ifndef lint |
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41 | __COPYRIGHT( |
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42 | "@(#) Copyright (c) 1988, 1993, 1994\n\ |
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43 | The Regents of the University of California. All rights reserved.\n"); |
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44 | #endif /* not lint */ |
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45 | |
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46 | #ifndef lint |
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47 | #if 0 |
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48 | static char sccsid[] = "@(#)cp.c 8.5 (Berkeley) 4/29/95"; |
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49 | #else |
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50 | __RCSID("$NetBSD: cp.c,v 1.39 2005/10/24 12:59:07 kleink Exp $"); |
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51 | #endif |
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52 | #endif /* not lint */ |
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53 | #endif |
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54 | /* |
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55 | * Cp copies source files to target files. |
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56 | * |
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57 | * The global PATH_T structure "to" always contains the path to the |
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58 | * current target file. Since fts(3) does not change directories, |
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59 | * this path can be either absolute or dot-relative. |
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60 | * |
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61 | * The basic algorithm is to initialize "to" and use fts(3) to traverse |
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62 | * the file hierarchy rooted in the argument list. A trivial case is the |
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63 | * case of 'cp file1 file2'. The more interesting case is the case of |
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64 | * 'cp file1 file2 ... fileN dir' where the hierarchy is traversed and the |
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65 | * path (relative to the root of the traversal) is appended to dir (stored |
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66 | * in "to") to form the final target path. |
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67 | */ |
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68 | |
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69 | #include <rtems.h> |
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70 | #include <rtems/shell.h> |
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71 | #include <rtems/shellconfig.h> |
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72 | #define __need_getopt_newlib |
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73 | #include <getopt.h> |
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74 | |
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75 | #include <sys/param.h> |
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76 | #include <sys/stat.h> |
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77 | |
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78 | #include <err.h> |
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79 | #include <errno.h> |
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80 | #include <fts.h> |
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81 | #include <limits.h> |
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82 | #include <signal.h> |
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83 | #include <stdio.h> |
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84 | #include <stdlib.h> |
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85 | #include <string.h> |
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86 | #include <unistd.h> |
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87 | |
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88 | #include "extern-cp.h" |
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89 | |
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90 | #define S_ISTXT 0 |
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91 | |
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92 | #define STRIP_TRAILING_SLASH(p) { \ |
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93 | while ((p).p_end > (p).p_path + 1 && (p).p_end[-1] == '/') \ |
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94 | *--(p).p_end = 0; \ |
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95 | } |
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96 | |
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97 | enum op { FILE_TO_FILE, FILE_TO_DIR, DIR_TO_DNE }; |
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98 | |
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99 | static int Rflag, rflag; |
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100 | |
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101 | static int main_cp(rtems_shell_cp_globals* cp_globals, int, char *[]); |
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102 | static int copy(rtems_shell_cp_globals* cp_globals, char *[], enum op, int); |
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103 | static int mastercmp(const FTSENT **, const FTSENT **); |
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104 | |
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105 | void |
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106 | rtems_shell_cp_exit (rtems_shell_cp_globals* cp_global, int code __attribute__((unused))) |
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107 | { |
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108 | longjmp (cp_global->exit_jmp, 1); |
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109 | } |
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110 | |
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111 | int |
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112 | rtems_shell_main_cp(int argc, char *argv[]) |
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113 | { |
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114 | rtems_shell_cp_globals cp_globals; |
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115 | memset (&cp_globals, 0, sizeof (cp_globals)); |
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116 | Rflag = rflag = 0; |
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117 | if (setjmp (cp_globals.exit_jmp) == 0) |
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118 | return main_cp (&cp_globals, argc, argv); |
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119 | return 1; |
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120 | } |
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121 | |
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122 | int |
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123 | main_cp(rtems_shell_cp_globals* cp_globals, int argc, char *argv[]) |
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124 | { |
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125 | struct stat to_stat, tmp_stat; |
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126 | enum op type; |
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127 | int Hflag, Lflag, Pflag, ch, fts_options, r, have_trailing_slash; |
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128 | char *target; |
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129 | struct getopt_data getopt_reent; |
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130 | |
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131 | Hflag = Lflag = Pflag = 0; |
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132 | memset(&getopt_reent, 0, sizeof(getopt_data)); |
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133 | |
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134 | while ((ch = getopt_r(argc, argv, "HLPRafilnprv", &getopt_reent)) != -1) |
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135 | switch (ch) { |
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136 | case 'H': |
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137 | Hflag = 1; |
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138 | Lflag = Pflag = 0; |
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139 | break; |
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140 | case 'L': |
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141 | Lflag = 1; |
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142 | Hflag = Pflag = 0; |
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143 | break; |
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144 | case 'P': |
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145 | Pflag = 1; |
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146 | Hflag = Lflag = 0; |
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147 | break; |
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148 | case 'R': |
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149 | Rflag = 1; |
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150 | break; |
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151 | case 'a': |
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152 | Pflag = 1; |
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153 | pflag = 1; |
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154 | Rflag = 1; |
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155 | Hflag = Lflag = 0; |
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156 | break; |
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157 | case 'f': |
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158 | fflag = 1; |
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159 | iflag = nflag = 0; |
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160 | break; |
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161 | case 'i': |
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162 | iflag = 1; |
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163 | fflag = nflag = 0; |
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164 | break; |
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165 | case 'l': |
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166 | lflag = 1; |
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167 | break; |
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168 | case 'n': |
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169 | nflag = 1; |
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170 | fflag = iflag = 0; |
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171 | break; |
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172 | case 'p': |
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173 | pflag = 1; |
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174 | break; |
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175 | case 'r': |
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176 | rflag = Lflag = 1; |
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177 | Hflag = Pflag = 0; |
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178 | break; |
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179 | case 'v': |
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180 | vflag = 1; |
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181 | break; |
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182 | default: |
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183 | usage(cp_globals); |
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184 | break; |
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185 | } |
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186 | argc -= getopt_reent.optind; |
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187 | argv += getopt_reent.optind; |
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188 | |
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189 | if (argc < 2) |
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190 | usage(cp_globals); |
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191 | |
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192 | fts_options = FTS_NOCHDIR | FTS_PHYSICAL; |
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193 | if (Rflag && rflag) |
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194 | errx(exit_jump, 1, "the -R and -r options may not be specified together"); |
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195 | if (rflag) |
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196 | Rflag = 1; |
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197 | if (Rflag) { |
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198 | if (Hflag) |
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199 | fts_options |= FTS_COMFOLLOW; |
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200 | if (Lflag) { |
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201 | fts_options &= ~FTS_PHYSICAL; |
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202 | fts_options |= FTS_LOGICAL; |
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203 | } |
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204 | } else { |
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205 | fts_options &= ~FTS_PHYSICAL; |
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206 | fts_options |= FTS_LOGICAL | FTS_COMFOLLOW; |
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207 | } |
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208 | #if 0 |
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209 | (void)signal(SIGINFO, siginfo); |
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210 | #endif |
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211 | |
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212 | /* Save the target base in "to". */ |
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213 | target = argv[--argc]; |
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214 | if (strlcpy(to.p_path, target, sizeof(to.p_path)) >= sizeof(to.p_path)) |
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215 | errx(exit_jump, 1, "%s: name too long", target); |
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216 | to.p_end = to.p_path + strlen(to.p_path); |
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217 | if (to.p_path == to.p_end) { |
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218 | *to.p_end++ = '.'; |
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219 | *to.p_end = 0; |
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220 | } |
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221 | have_trailing_slash = (to.p_end[-1] == '/'); |
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222 | if (have_trailing_slash) |
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223 | STRIP_TRAILING_SLASH(to); |
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224 | to.target_end = to.p_end; |
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225 | |
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226 | /* Set end of argument list for fts(3). */ |
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227 | argv[argc] = NULL; |
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228 | |
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229 | /* |
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230 | * Cp has two distinct cases: |
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231 | * |
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232 | * cp [-R] source target |
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233 | * cp [-R] source1 ... sourceN directory |
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234 | * |
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235 | * In both cases, source can be either a file or a directory. |
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236 | * |
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237 | * In (1), the target becomes a copy of the source. That is, if the |
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238 | * source is a file, the target will be a file, and likewise for |
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239 | * directories. |
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240 | * |
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241 | * In (2), the real target is not directory, but "directory/source". |
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242 | */ |
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243 | r = stat(to.p_path, &to_stat); |
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244 | if (r == -1 && errno != ENOENT) |
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245 | err(exit_jump, 1, "%s", to.p_path); |
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246 | if (r == -1 || !S_ISDIR(to_stat.st_mode)) { |
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247 | /* |
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248 | * Case (1). Target is not a directory. |
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249 | */ |
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250 | if (argc > 1) |
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251 | errx(exit_jump, 1, "%s is not a directory", to.p_path); |
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252 | |
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253 | /* |
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254 | * Need to detect the case: |
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255 | * cp -R dir foo |
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256 | * Where dir is a directory and foo does not exist, where |
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257 | * we want pathname concatenations turned on but not for |
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258 | * the initial mkdir(). |
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259 | */ |
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260 | if (r == -1) { |
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261 | if (Rflag && (Lflag || Hflag)) |
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262 | stat(*argv, &tmp_stat); |
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263 | else |
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264 | lstat(*argv, &tmp_stat); |
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265 | |
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266 | if (S_ISDIR(tmp_stat.st_mode) && Rflag) |
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267 | type = DIR_TO_DNE; |
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268 | else |
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269 | type = FILE_TO_FILE; |
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270 | } else |
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271 | type = FILE_TO_FILE; |
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272 | |
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273 | if (have_trailing_slash && type == FILE_TO_FILE) { |
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274 | if (r == -1) |
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275 | errx(exit_jump, 1, "directory %s does not exist", |
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276 | to.p_path); |
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277 | else |
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278 | errx(exit_jump, 1, "%s is not a directory", to.p_path); |
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279 | } |
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280 | } else |
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281 | /* |
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282 | * Case (2). Target is a directory. |
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283 | */ |
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284 | type = FILE_TO_DIR; |
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285 | |
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286 | return copy(cp_globals, argv, type, fts_options); |
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287 | } |
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288 | |
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289 | int |
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290 | copy(rtems_shell_cp_globals* cp_globals, |
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291 | char *argv[], enum op type, int fts_options) |
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292 | { |
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293 | struct stat to_stat; |
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294 | FTS *ftsp; |
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295 | FTSENT *curr; |
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296 | int base = 0, dne, badcp, rval; |
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297 | size_t nlen; |
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298 | char *p, *target_mid; |
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299 | mode_t mask, mode; |
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300 | |
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301 | /* |
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302 | * Keep an inverted copy of the umask, for use in correcting |
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303 | * permissions on created directories when not using -p. |
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304 | */ |
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305 | mask = ~umask(0777); |
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306 | umask(~mask); |
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307 | |
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308 | if ((ftsp = fts_open(argv, fts_options, mastercmp)) == NULL) |
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309 | err(exit_jump, 1, "fts_open"); |
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310 | for (badcp = rval = 0; (curr = fts_read(ftsp)) != NULL; badcp = 0) { |
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311 | switch (curr->fts_info) { |
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312 | case FTS_NS: |
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313 | case FTS_DNR: |
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314 | case FTS_ERR: |
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315 | warnx("%s: %s", |
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316 | curr->fts_path, strerror(curr->fts_errno)); |
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317 | badcp = rval = 1; |
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318 | continue; |
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319 | case FTS_DC: /* Warn, continue. */ |
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320 | warnx("%s: directory causes a cycle", curr->fts_path); |
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321 | badcp = rval = 1; |
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322 | continue; |
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323 | default: |
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324 | ; |
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325 | } |
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326 | |
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327 | /* |
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328 | * If we are in case (2) or (3) above, we need to append the |
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329 | * source name to the target name. |
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330 | */ |
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331 | if (type != FILE_TO_FILE) { |
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332 | /* |
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333 | * Need to remember the roots of traversals to create |
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334 | * correct pathnames. If there's a directory being |
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335 | * copied to a non-existent directory, e.g. |
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336 | * cp -R a/dir noexist |
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337 | * the resulting path name should be noexist/foo, not |
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338 | * noexist/dir/foo (where foo is a file in dir), which |
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339 | * is the case where the target exists. |
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340 | * |
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341 | * Also, check for "..". This is for correct path |
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342 | * concatenation for paths ending in "..", e.g. |
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343 | * cp -R .. /tmp |
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344 | * Paths ending in ".." are changed to ".". This is |
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345 | * tricky, but seems the easiest way to fix the problem. |
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346 | * |
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347 | * XXX |
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348 | * Since the first level MUST be FTS_ROOTLEVEL, base |
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349 | * is always initialized. |
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350 | */ |
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351 | if (curr->fts_level == FTS_ROOTLEVEL) { |
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352 | if (type != DIR_TO_DNE) { |
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353 | p = strrchr(curr->fts_path, '/'); |
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354 | base = (p == NULL) ? 0 : |
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355 | (int)(p - curr->fts_path + 1); |
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356 | |
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357 | if (!strcmp(&curr->fts_path[base], |
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358 | "..")) |
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359 | base += 1; |
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360 | } else |
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361 | base = curr->fts_pathlen; |
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362 | } |
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363 | |
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364 | p = &curr->fts_path[base]; |
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365 | nlen = curr->fts_pathlen - base; |
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366 | target_mid = to.target_end; |
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367 | if (*p != '/' && target_mid[-1] != '/') |
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368 | *target_mid++ = '/'; |
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369 | *target_mid = 0; |
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370 | if (target_mid - to.p_path + nlen >= PATH_MAX) { |
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371 | warnx("%s%s: name too long (not copied)", |
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372 | to.p_path, p); |
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373 | badcp = rval = 1; |
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374 | continue; |
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375 | } |
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376 | (void)strncat(target_mid, p, nlen); |
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377 | to.p_end = target_mid + nlen; |
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378 | *to.p_end = 0; |
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379 | STRIP_TRAILING_SLASH(to); |
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380 | } |
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381 | |
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382 | if (curr->fts_info == FTS_DP) { |
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383 | /* |
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384 | * We are nearly finished with this directory. If we |
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385 | * didn't actually copy it, or otherwise don't need to |
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386 | * change its attributes, then we are done. |
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387 | */ |
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388 | if (!curr->fts_number) |
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389 | continue; |
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390 | /* |
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391 | * If -p is in effect, set all the attributes. |
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392 | * Otherwise, set the correct permissions, limited |
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393 | * by the umask. Optimise by avoiding a chmod() |
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394 | * if possible (which is usually the case if we |
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395 | * made the directory). Note that mkdir() does not |
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396 | * honour setuid, setgid and sticky bits, but we |
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397 | * normally want to preserve them on directories. |
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398 | */ |
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399 | if (pflag) { |
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400 | if (setfile(cp_globals, curr->fts_statp, -1)) |
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401 | rval = 1; |
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402 | if (preserve_dir_acls(curr->fts_statp, |
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403 | curr->fts_accpath, to.p_path) != 0) |
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404 | rval = 1; |
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405 | } else { |
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406 | mode = curr->fts_statp->st_mode; |
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407 | if ((mode & (S_ISUID | S_ISGID | S_ISTXT)) || |
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408 | ((mode | S_IRWXU) & mask) != (mode & mask)) |
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409 | if (chmod(to.p_path, mode & mask) != 0){ |
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410 | warn("chmod: %s", to.p_path); |
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411 | rval = 1; |
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412 | } |
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413 | } |
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414 | continue; |
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415 | } |
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416 | |
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417 | /* Not an error but need to remember it happened */ |
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418 | if (stat(to.p_path, &to_stat) == -1) |
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419 | dne = 1; |
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420 | else { |
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421 | if (to_stat.st_dev == curr->fts_statp->st_dev && |
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422 | to_stat.st_ino == curr->fts_statp->st_ino) { |
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423 | warnx("%s and %s are identical (not copied).", |
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424 | to.p_path, curr->fts_path); |
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425 | badcp = rval = 1; |
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426 | if (S_ISDIR(curr->fts_statp->st_mode)) |
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427 | (void)fts_set(ftsp, curr, FTS_SKIP); |
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428 | continue; |
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429 | } |
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430 | if (!S_ISDIR(curr->fts_statp->st_mode) && |
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431 | S_ISDIR(to_stat.st_mode)) { |
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432 | warnx("cannot overwrite directory %s with " |
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433 | "non-directory %s", |
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434 | to.p_path, curr->fts_path); |
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435 | badcp = rval = 1; |
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436 | continue; |
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437 | } |
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438 | dne = 0; |
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439 | } |
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440 | |
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441 | switch (curr->fts_statp->st_mode & S_IFMT) { |
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442 | case S_IFLNK: |
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443 | /* Catch special case of a non-dangling symlink */ |
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444 | if ((fts_options & FTS_LOGICAL) || |
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445 | ((fts_options & FTS_COMFOLLOW) && |
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446 | curr->fts_level == 0)) { |
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447 | if (copy_file(cp_globals, curr, dne)) |
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448 | badcp = rval = 1; |
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449 | } else { |
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450 | if (copy_link(cp_globals, curr, !dne)) |
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451 | badcp = rval = 1; |
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452 | } |
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453 | break; |
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454 | case S_IFDIR: |
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455 | if (!Rflag) { |
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456 | warnx("%s is a directory (not copied).", |
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457 | curr->fts_path); |
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458 | (void)fts_set(ftsp, curr, FTS_SKIP); |
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459 | badcp = rval = 1; |
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460 | break; |
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461 | } |
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462 | /* |
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463 | * If the directory doesn't exist, create the new |
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464 | * one with the from file mode plus owner RWX bits, |
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465 | * modified by the umask. Trade-off between being |
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466 | * able to write the directory (if from directory is |
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467 | * 555) and not causing a permissions race. If the |
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468 | * umask blocks owner writes, we fail.. |
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469 | */ |
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470 | if (dne) { |
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471 | if (mkdir(to.p_path, |
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472 | curr->fts_statp->st_mode | S_IRWXU) < 0) |
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473 | err(exit_jump, 1, "%s", to.p_path); |
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474 | } else if (!S_ISDIR(to_stat.st_mode)) { |
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475 | errno = ENOTDIR; |
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476 | err(exit_jump, 1, "%s", to.p_path); |
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477 | } |
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478 | /* |
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479 | * Arrange to correct directory attributes later |
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480 | * (in the post-order phase) if this is a new |
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481 | * directory, or if the -p flag is in effect. |
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482 | */ |
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483 | curr->fts_number = pflag || dne; |
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484 | break; |
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485 | case S_IFBLK: |
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486 | case S_IFCHR: |
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487 | if (Rflag) { |
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488 | if (copy_special(cp_globals, curr->fts_statp, !dne)) |
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489 | badcp = rval = 1; |
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490 | } else { |
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491 | if (copy_file(cp_globals, curr, dne)) |
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492 | badcp = rval = 1; |
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493 | } |
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494 | break; |
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495 | case S_IFSOCK: |
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496 | warnx("%s is a socket (not copied).", |
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497 | curr->fts_path); |
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498 | case S_IFIFO: |
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499 | if (Rflag) { |
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500 | if (copy_fifo(cp_globals, curr->fts_statp, !dne)) |
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501 | badcp = rval = 1; |
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502 | } else { |
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503 | if (copy_file(cp_globals, curr, dne)) |
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504 | badcp = rval = 1; |
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505 | } |
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506 | break; |
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507 | default: |
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508 | if (copy_file(cp_globals, curr, dne)) |
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509 | badcp = rval = 1; |
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510 | break; |
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511 | } |
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512 | if (vflag && !badcp) |
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513 | (void)printf("%s -> %s\n", curr->fts_path, to.p_path); |
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514 | } |
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515 | if (errno) |
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516 | err(exit_jump, 1, "fts_read"); |
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517 | fts_close(ftsp); |
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518 | return (rval); |
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519 | } |
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520 | |
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521 | /* |
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522 | * mastercmp -- |
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523 | * The comparison function for the copy order. The order is to copy |
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524 | * non-directory files before directory files. The reason for this |
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525 | * is because files tend to be in the same cylinder group as their |
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526 | * parent directory, whereas directories tend not to be. Copying the |
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527 | * files first reduces seeking. |
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528 | */ |
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529 | int |
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530 | mastercmp(const FTSENT **a, const FTSENT **b) |
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531 | { |
---|
532 | int a_info, b_info; |
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533 | |
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534 | a_info = (*a)->fts_info; |
---|
535 | if (a_info == FTS_ERR || a_info == FTS_NS || a_info == FTS_DNR) |
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536 | return (0); |
---|
537 | b_info = (*b)->fts_info; |
---|
538 | if (b_info == FTS_ERR || b_info == FTS_NS || b_info == FTS_DNR) |
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539 | return (0); |
---|
540 | if (a_info == FTS_D) |
---|
541 | return (-1); |
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542 | if (b_info == FTS_D) |
---|
543 | return (1); |
---|
544 | return (0); |
---|
545 | } |
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546 | |
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547 | rtems_shell_cmd_t rtems_shell_CP_Command = { |
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548 | "cp", /* name */ |
---|
549 | "cp [-R [-H | -L | -P]] [-f | -i] [-pv] src target", /* usage */ |
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550 | "files", /* topic */ |
---|
551 | rtems_shell_main_cp, /* command */ |
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552 | NULL, /* alias */ |
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553 | NULL /* next */ |
---|
554 | }; |
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555 | |
---|