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3294 | post | 1 | /* Copyright (c) 2008, Tim Post <tinkertim@gmail.com> |
2 | * All rights reserved. |
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3277 | post | 3 | * |
3294 | post | 4 | * Redistribution and use in source and binary forms, with or without |
5 | * modification, are permitted provided that the following conditions are met: |
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6 | * |
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7 | * Redistributions of source code must retain the above copyright notice, this |
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8 | * list of conditions and the following disclaimer. |
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9 | * |
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10 | * Redistributions in binary form must reproduce the above copyright notice, |
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11 | * this list of conditions and the following disclaimer in the documentation |
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12 | * and/or other materials provided with the distribution. |
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13 | * |
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14 | * Neither the name of the original program's authors nor the names of its |
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15 | * contributors may be used to endorse or promote products derived from this |
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16 | * software without specific prior written permission. |
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17 | * |
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18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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19 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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21 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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22 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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23 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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24 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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25 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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26 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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27 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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28 | * POSSIBILITY OF SUCH DAMAGE. |
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29 | */ |
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3277 | post | 30 | |
3294 | post | 31 | /* NOTE: |
32 | * This is a bit of an ugly hack, working around the absence of fstat / etc. |
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33 | * As more stuff is completed and exposed in libc, this will improve */ |
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3293 | post | 34 | |
3277 | post | 35 | #include <stdio.h> |
36 | #include <stdlib.h> |
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3293 | post | 37 | #include <unistd.h> |
38 | #include <dirent.h> |
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39 | #include <fcntl.h> |
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40 | #include <sys/types.h> |
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41 | #include <sys/stat.h> |
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42 | #include <string.h> |
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43 | |||
44 | #include "errors.h" |
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45 | #include "config.h" |
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46 | #include "util.h" |
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3277 | post | 47 | #include "entry.h" |
48 | #include "ls.h" |
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49 | #include "cmds.h" |
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50 | |||
51 | static char *cmdname = "ls"; |
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52 | |||
3364 | post | 53 | static void ls_scan_dir(const char *d, DIR *dirp) |
3293 | post | 54 | { |
3326 | post | 55 | struct dirent *dp; |
56 | char *buff; |
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3309 | post | 57 | |
3326 | post | 58 | if (! dirp) |
59 | return; |
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3309 | post | 60 | |
3326 | post | 61 | buff = (char *)malloc(PATH_MAX); |
62 | if (NULL == buff) { |
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63 | cli_error(CL_ENOMEM, "ls: failed to scan %s", d); |
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64 | return; |
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65 | } |
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3309 | post | 66 | |
3326 | post | 67 | while ((dp = readdir(dirp))) { |
68 | memset(buff, 0, sizeof(buff)); |
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69 | /* Don't worry if inserting a double slash, this will be fixed by |
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70 | * absolutize() later with subsequent calls to open() or readdir() */ |
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71 | snprintf(buff, PATH_MAX - 1, "%s/%s", d, dp->d_name); |
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4587 | jermar | 72 | ls_print(dp->d_name, buff); |
3309 | post | 73 | } |
3326 | post | 74 | |
75 | free(buff); |
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76 | |||
3293 | post | 77 | return; |
78 | } |
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79 | |||
4587 | jermar | 80 | /* ls_print currently does nothing more than print the entry. |
3326 | post | 81 | * in the future, we will likely pass the absolute path, and |
82 | * some sort of ls_options structure that controls how each |
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83 | * entry is printed and what is printed about it. |
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84 | * |
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85 | * Now we just print basic DOS style lists */ |
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86 | |||
4587 | jermar | 87 | static void ls_print(const char *name, const char *pathname) |
3326 | post | 88 | { |
4587 | jermar | 89 | struct stat s; |
90 | int rc; |
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3326 | post | 91 | |
4682 | svoboda | 92 | rc = stat(pathname, &s); |
93 | if (rc != 0) { |
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4587 | jermar | 94 | /* Odd chance it was deleted from the time readdir() found it */ |
95 | printf("ls: skipping bogus node %s\n", pathname); |
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96 | printf("rc=%d\n", rc); |
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97 | return; |
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98 | } |
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99 | |||
100 | if (s.is_file) |
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101 | printf("%-40s\t%llu\n", name, (long long) s.size); |
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102 | else |
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103 | printf("%-40s\n", name); |
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3326 | post | 104 | |
105 | return; |
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106 | } |
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107 | |||
3413 | post | 108 | void help_cmd_ls(unsigned int level) |
3277 | post | 109 | { |
3294 | post | 110 | if (level == HELP_SHORT) { |
111 | printf("`%s' lists files and directories.\n", cmdname); |
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112 | } else { |
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113 | help_cmd_ls(HELP_SHORT); |
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114 | printf(" `%s' [path], if no path is given the current " |
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115 | "working directory is used.\n", cmdname); |
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116 | } |
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117 | |||
3413 | post | 118 | return; |
3277 | post | 119 | } |
120 | |||
3413 | post | 121 | int cmd_ls(char **argv) |
3277 | post | 122 | { |
123 | unsigned int argc; |
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4587 | jermar | 124 | struct stat s; |
3293 | post | 125 | char *buff; |
126 | DIR *dirp; |
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127 | |||
3376 | post | 128 | argc = cli_count_args(argv); |
3277 | post | 129 | |
3293 | post | 130 | buff = (char *) malloc(PATH_MAX); |
131 | if (NULL == buff) { |
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132 | cli_error(CL_ENOMEM, "%s: ", cmdname); |
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133 | return CMD_FAILURE; |
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3277 | post | 134 | } |
3293 | post | 135 | memset(buff, 0, sizeof(buff)); |
3277 | post | 136 | |
3293 | post | 137 | if (argc == 1) |
138 | getcwd(buff, PATH_MAX); |
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139 | else |
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4268 | svoboda | 140 | str_cpy(buff, PATH_MAX, argv[1]); |
3277 | post | 141 | |
4587 | jermar | 142 | if (stat(buff, &s)) { |
3293 | post | 143 | cli_error(CL_ENOENT, buff); |
144 | free(buff); |
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145 | return CMD_FAILURE; |
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4587 | jermar | 146 | } |
147 | |||
148 | if (s.is_file) { |
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149 | ls_print(buff, buff); |
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150 | } else { |
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3293 | post | 151 | dirp = opendir(buff); |
4587 | jermar | 152 | if (!dirp) { |
3326 | post | 153 | /* May have been deleted between scoping it and opening it */ |
154 | cli_error(CL_EFAIL, "Could not stat %s", buff); |
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155 | free(buff); |
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156 | return CMD_FAILURE; |
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157 | } |
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158 | ls_scan_dir(buff, dirp); |
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3293 | post | 159 | closedir(dirp); |
160 | } |
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161 | |||
162 | free(buff); |
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163 | |||
164 | return CMD_SUCCESS; |
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3277 | post | 165 | } |
166 |