1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * tiny-ls.c version 0.1.0: A minimalist 'ls'
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4 | * Copyright (C) 1996 Brian Candler <B.Candler@pobox.com>
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5 | *
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6 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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7 | */
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8 |
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9 | /*
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10 | * To achieve a small memory footprint, this version of 'ls' doesn't do any
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11 | * file sorting, and only has the most essential command line switches
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12 | * (i.e., the ones I couldn't live without :-) All features which involve
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13 | * linking in substantial chunks of libc can be disabled.
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14 | *
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15 | * Although I don't really want to add new features to this program to
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16 | * keep it small, I *am* interested to receive bug fixes and ways to make
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17 | * it more portable.
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18 | *
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19 | * KNOWN BUGS:
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20 | * 1. ls -l of a directory doesn't give "total <blocks>" header
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21 | * 2. ls of a symlink to a directory doesn't list directory contents
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22 | * 3. hidden files can make column width too large
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23 | *
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24 | * NON-OPTIMAL BEHAVIOUR:
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25 | * 1. autowidth reads directories twice
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26 | * 2. if you do a short directory listing without filetype characters
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27 | * appended, there's no need to stat each one
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28 | * PORTABILITY:
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29 | * 1. requires lstat (BSD) - how do you do it without?
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30 | */
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31 |
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32 | #include <getopt.h>
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33 | #include "libbb.h"
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34 |
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35 | /* This is a NOEXEC applet. Be very careful! */
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36 |
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37 |
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38 | enum {
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39 |
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40 | TERMINAL_WIDTH = 80, /* use 79 if terminal has linefold bug */
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41 | COLUMN_GAP = 2, /* includes the file type char */
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42 |
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43 | /* what is the overall style of the listing */
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44 | STYLE_COLUMNS = 1 << 21, /* fill columns */
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45 | STYLE_LONG = 2 << 21, /* one record per line, extended info */
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46 | STYLE_SINGLE = 3 << 21, /* one record per line */
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47 | STYLE_MASK = STYLE_SINGLE,
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48 |
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49 | /* 51306 lrwxrwxrwx 1 root root 2 May 11 01:43 /bin/view -> vi* */
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50 | /* what file information will be listed */
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51 | LIST_INO = 1 << 0,
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52 | LIST_BLOCKS = 1 << 1,
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53 | LIST_MODEBITS = 1 << 2,
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54 | LIST_NLINKS = 1 << 3,
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55 | LIST_ID_NAME = 1 << 4,
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56 | LIST_ID_NUMERIC = 1 << 5,
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57 | LIST_CONTEXT = 1 << 6,
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58 | LIST_SIZE = 1 << 7,
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59 | LIST_DEV = 1 << 8,
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60 | LIST_DATE_TIME = 1 << 9,
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61 | LIST_FULLTIME = 1 << 10,
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62 | LIST_FILENAME = 1 << 11,
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63 | LIST_SYMLINK = 1 << 12,
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64 | LIST_FILETYPE = 1 << 13,
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65 | LIST_EXEC = 1 << 14,
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66 | LIST_MASK = (LIST_EXEC << 1) - 1,
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67 |
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68 | /* what files will be displayed */
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69 | DISP_DIRNAME = 1 << 15, /* 2 or more items? label directories */
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70 | DISP_HIDDEN = 1 << 16, /* show filenames starting with . */
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71 | DISP_DOT = 1 << 17, /* show . and .. */
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72 | DISP_NOLIST = 1 << 18, /* show directory as itself, not contents */
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73 | DISP_RECURSIVE = 1 << 19, /* show directory and everything below it */
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74 | DISP_ROWS = 1 << 20, /* print across rows */
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75 | DISP_MASK = ((DISP_ROWS << 1) - 1) & ~(DISP_DIRNAME - 1),
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76 |
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77 | /* how will the files be sorted (CONFIG_FEATURE_LS_SORTFILES) */
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78 | SORT_FORWARD = 0, /* sort in reverse order */
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79 | SORT_REVERSE = 1 << 27, /* sort in reverse order */
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80 |
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81 | SORT_NAME = 0, /* sort by file name */
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82 | SORT_SIZE = 1 << 28, /* sort by file size */
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83 | SORT_ATIME = 2 << 28, /* sort by last access time */
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84 | SORT_CTIME = 3 << 28, /* sort by last change time */
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85 | SORT_MTIME = 4 << 28, /* sort by last modification time */
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86 | SORT_VERSION = 5 << 28, /* sort by version */
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87 | SORT_EXT = 6 << 28, /* sort by file name extension */
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88 | SORT_DIR = 7 << 28, /* sort by file or directory */
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89 | SORT_MASK = (7 << 28) * ENABLE_FEATURE_LS_SORTFILES,
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90 |
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91 | /* which of the three times will be used */
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92 | TIME_CHANGE = (1 << 23) * ENABLE_FEATURE_LS_TIMESTAMPS,
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93 | TIME_ACCESS = (1 << 24) * ENABLE_FEATURE_LS_TIMESTAMPS,
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94 | TIME_MASK = (3 << 23) * ENABLE_FEATURE_LS_TIMESTAMPS,
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95 |
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96 | FOLLOW_LINKS = (1 << 25) * ENABLE_FEATURE_LS_FOLLOWLINKS,
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97 |
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98 | LS_DISP_HR = (1 << 26) * ENABLE_FEATURE_HUMAN_READABLE,
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99 |
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100 | LIST_SHORT = LIST_FILENAME,
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101 | LIST_LONG = LIST_MODEBITS | LIST_NLINKS | LIST_ID_NAME | LIST_SIZE | \
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102 | LIST_DATE_TIME | LIST_FILENAME | LIST_SYMLINK,
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103 |
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104 | SPLIT_DIR = 1,
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105 | SPLIT_FILE = 0,
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106 | SPLIT_SUBDIR = 2,
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107 |
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108 | };
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109 |
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110 | #define TYPEINDEX(mode) (((mode) >> 12) & 0x0f)
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111 | #define TYPECHAR(mode) ("0pcCd?bB-?l?s???" [TYPEINDEX(mode)])
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112 | #define APPCHAR(mode) ("\0|\0\0/\0\0\0\0\0@\0=\0\0\0" [TYPEINDEX(mode)])
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113 | #define COLOR(mode) ("\000\043\043\043\042\000\043\043"\
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114 | "\000\000\044\000\043\000\000\040" [TYPEINDEX(mode)])
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115 | #define ATTR(mode) ("\00\00\01\00\01\00\01\00"\
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116 | "\00\00\01\00\01\00\00\01" [TYPEINDEX(mode)])
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117 |
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118 | /* colored LS support by JaWi, janwillem.janssen@lxtreme.nl */
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119 | #if ENABLE_FEATURE_LS_COLOR
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120 | static smallint show_color;
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121 | /* long option entry used only for --color, which has no short option
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122 | * equivalent */
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123 | static const char ls_color_opt[] ALIGN1 =
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124 | "color\0" Optional_argument "\xff" /* no short equivalent */
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125 | ;
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126 | #else
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127 | enum { show_color = 0 };
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128 | #endif
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129 |
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130 | /*
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131 | * a directory entry and its stat info are stored here
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132 | */
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133 | struct dnode { /* the basic node */
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134 | const char *name; /* the dir entry name */
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135 | const char *fullname; /* the dir entry name */
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136 | int allocated;
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137 | struct stat dstat; /* the file stat info */
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138 | USE_SELINUX(security_context_t sid;)
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139 | struct dnode *next; /* point at the next node */
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140 | };
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141 | typedef struct dnode dnode_t;
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142 |
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143 | static struct dnode **list_dir(const char *);
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144 | static struct dnode **dnalloc(int);
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145 | static int list_single(struct dnode *);
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146 |
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147 | static unsigned all_fmt;
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148 |
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149 | #if ENABLE_FEATURE_AUTOWIDTH
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150 | static unsigned tabstops = COLUMN_GAP;
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151 | static unsigned terminal_width = TERMINAL_WIDTH;
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152 | #else
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153 | enum {
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154 | tabstops = COLUMN_GAP,
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155 | terminal_width = TERMINAL_WIDTH,
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156 | };
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157 | #endif
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158 |
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159 | static int status = EXIT_SUCCESS;
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160 |
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161 | static struct dnode *my_stat(const char *fullname, const char *name, int force_follow)
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162 | {
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163 | struct stat dstat;
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164 | struct dnode *cur;
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165 | USE_SELINUX(security_context_t sid = NULL;)
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166 |
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167 | if ((all_fmt & FOLLOW_LINKS) || force_follow) {
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168 | #if ENABLE_SELINUX
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169 | if (is_selinux_enabled()) {
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170 | getfilecon(fullname, &sid);
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171 | }
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172 | #endif
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173 | if (stat(fullname, &dstat)) {
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174 | bb_perror_msg("%s", fullname);
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175 | status = EXIT_FAILURE;
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176 | return 0;
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177 | }
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178 | } else {
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179 | #if ENABLE_SELINUX
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180 | if (is_selinux_enabled()) {
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181 | lgetfilecon(fullname, &sid);
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182 | }
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183 | #endif
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184 | if (lstat(fullname, &dstat)) {
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185 | bb_perror_msg("%s", fullname);
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186 | status = EXIT_FAILURE;
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187 | return 0;
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188 | }
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189 | }
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190 |
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191 | cur = xmalloc(sizeof(struct dnode));
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192 | cur->fullname = fullname;
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193 | cur->name = name;
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194 | cur->dstat = dstat;
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195 | USE_SELINUX(cur->sid = sid;)
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196 | return cur;
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197 | }
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198 |
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199 | #if ENABLE_FEATURE_LS_COLOR
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200 | static char fgcolor(mode_t mode)
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201 | {
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202 | /* Check wheter the file is existing (if so, color it red!) */
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203 | if (errno == ENOENT)
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204 | return '\037';
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205 | if (S_ISREG(mode) && (mode & (S_IXUSR | S_IXGRP | S_IXOTH)))
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206 | return COLOR(0xF000); /* File is executable ... */
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207 | return COLOR(mode);
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208 | }
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209 |
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210 | static char bgcolor(mode_t mode)
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211 | {
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212 | if (S_ISREG(mode) && (mode & (S_IXUSR | S_IXGRP | S_IXOTH)))
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213 | return ATTR(0xF000); /* File is executable ... */
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214 | return ATTR(mode);
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215 | }
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216 | #endif
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217 |
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218 | #if ENABLE_FEATURE_LS_FILETYPES || ENABLE_FEATURE_LS_COLOR
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219 | static char append_char(mode_t mode)
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220 | {
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221 | if (!(all_fmt & LIST_FILETYPE))
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222 | return '\0';
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223 | if (S_ISDIR(mode))
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224 | return '/';
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225 | if (!(all_fmt & LIST_EXEC))
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226 | return '\0';
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227 | if (S_ISREG(mode) && (mode & (S_IXUSR | S_IXGRP | S_IXOTH)))
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228 | return '*';
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229 | return APPCHAR(mode);
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230 | }
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231 | #endif
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232 |
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233 | #define countdirs(A, B) count_dirs((A), (B), 1)
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234 | #define countsubdirs(A, B) count_dirs((A), (B), 0)
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235 | static int count_dirs(struct dnode **dn, int nfiles, int notsubdirs)
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236 | {
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237 | int i, dirs;
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238 |
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239 | if (!dn)
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240 | return 0;
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241 | dirs = 0;
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242 | for (i = 0; i < nfiles; i++) {
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243 | const char *name;
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244 | if (!S_ISDIR(dn[i]->dstat.st_mode))
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245 | continue;
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246 | name = dn[i]->name;
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247 | if (notsubdirs
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248 | || name[0]!='.' || (name[1] && (name[1]!='.' || name[2]))
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249 | ) {
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250 | dirs++;
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251 | }
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252 | }
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253 | return dirs;
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254 | }
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255 |
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256 | static int countfiles(struct dnode **dnp)
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257 | {
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258 | int nfiles;
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259 | struct dnode *cur;
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260 |
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261 | if (dnp == NULL)
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262 | return 0;
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263 | nfiles = 0;
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264 | for (cur = dnp[0]; cur->next; cur = cur->next)
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265 | nfiles++;
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266 | nfiles++;
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267 | return nfiles;
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268 | }
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269 |
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270 | /* get memory to hold an array of pointers */
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271 | static struct dnode **dnalloc(int num)
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272 | {
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273 | if (num < 1)
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274 | return NULL;
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275 |
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276 | return xzalloc(num * sizeof(struct dnode *));
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277 | }
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278 |
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279 | #if ENABLE_FEATURE_LS_RECURSIVE
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280 | static void dfree(struct dnode **dnp, int nfiles)
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281 | {
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282 | int i;
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283 |
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284 | if (dnp == NULL)
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285 | return;
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286 |
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287 | for (i = 0; i < nfiles; i++) {
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288 | struct dnode *cur = dnp[i];
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289 | if (cur->allocated)
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290 | free((char*)cur->fullname); /* free the filename */
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291 | free(cur); /* free the dnode */
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292 | }
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293 | free(dnp); /* free the array holding the dnode pointers */
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294 | }
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295 | #else
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296 | #define dfree(...) ((void)0)
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297 | #endif
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298 |
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299 | static struct dnode **splitdnarray(struct dnode **dn, int nfiles, int which)
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300 | {
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301 | int dncnt, i, d;
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302 | struct dnode **dnp;
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303 |
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304 | if (dn == NULL || nfiles < 1)
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305 | return NULL;
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306 |
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307 | /* count how many dirs and regular files there are */
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308 | if (which == SPLIT_SUBDIR)
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309 | dncnt = countsubdirs(dn, nfiles);
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310 | else {
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311 | dncnt = countdirs(dn, nfiles); /* assume we are looking for dirs */
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312 | if (which == SPLIT_FILE)
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313 | dncnt = nfiles - dncnt; /* looking for files */
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314 | }
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315 |
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316 | /* allocate a file array and a dir array */
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317 | dnp = dnalloc(dncnt);
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318 |
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319 | /* copy the entrys into the file or dir array */
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320 | for (d = i = 0; i < nfiles; i++) {
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321 | if (S_ISDIR(dn[i]->dstat.st_mode)) {
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322 | const char *name;
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323 | if (!(which & (SPLIT_DIR|SPLIT_SUBDIR)))
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324 | continue;
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325 | name = dn[i]->name;
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326 | if ((which & SPLIT_DIR)
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327 | || name[0]!='.' || (name[1] && (name[1]!='.' || name[2]))
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328 | ) {
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329 | dnp[d++] = dn[i];
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330 | }
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331 | } else if (!(which & (SPLIT_DIR|SPLIT_SUBDIR))) {
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332 | dnp[d++] = dn[i];
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333 | }
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334 | }
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335 | return dnp;
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336 | }
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337 |
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338 | #if ENABLE_FEATURE_LS_SORTFILES
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339 | static int sortcmp(const void *a, const void *b)
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340 | {
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341 | struct dnode *d1 = *(struct dnode **)a;
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342 | struct dnode *d2 = *(struct dnode **)b;
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343 | unsigned sort_opts = all_fmt & SORT_MASK;
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344 | int dif;
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345 |
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346 | dif = 0; /* assume SORT_NAME */
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347 | // TODO: use pre-initialized function pointer
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348 | // instead of branch forest
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349 | if (sort_opts == SORT_SIZE) {
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350 | dif = (int) (d2->dstat.st_size - d1->dstat.st_size);
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351 | } else if (sort_opts == SORT_ATIME) {
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352 | dif = (int) (d2->dstat.st_atime - d1->dstat.st_atime);
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353 | } else if (sort_opts == SORT_CTIME) {
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354 | dif = (int) (d2->dstat.st_ctime - d1->dstat.st_ctime);
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355 | } else if (sort_opts == SORT_MTIME) {
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356 | dif = (int) (d2->dstat.st_mtime - d1->dstat.st_mtime);
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357 | } else if (sort_opts == SORT_DIR) {
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358 | dif = S_ISDIR(d2->dstat.st_mode) - S_ISDIR(d1->dstat.st_mode);
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359 | /* } else if (sort_opts == SORT_VERSION) { */
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360 | /* } else if (sort_opts == SORT_EXT) { */
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361 | }
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362 |
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363 | if (dif == 0) {
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364 | /* sort by name - may be a tie_breaker for time or size cmp */
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365 | if (ENABLE_LOCALE_SUPPORT) dif = strcoll(d1->name, d2->name);
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366 | else dif = strcmp(d1->name, d2->name);
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367 | }
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368 |
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369 | if (all_fmt & SORT_REVERSE) {
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370 | dif = -dif;
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371 | }
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372 | return dif;
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373 | }
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374 |
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375 | static void dnsort(struct dnode **dn, int size)
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376 | {
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377 | qsort(dn, size, sizeof(*dn), sortcmp);
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378 | }
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379 | #else
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380 | #define dnsort(dn, size) ((void)0)
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381 | #endif
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382 |
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383 |
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384 | static void showfiles(struct dnode **dn, int nfiles)
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385 | {
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386 | int i, ncols, nrows, row, nc;
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387 | int column = 0;
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388 | int nexttab = 0;
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389 | int column_width = 0; /* for STYLE_LONG and STYLE_SINGLE not used */
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390 |
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391 | if (dn == NULL || nfiles < 1)
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392 | return;
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393 |
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394 | if (all_fmt & STYLE_LONG) {
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395 | ncols = 1;
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396 | } else {
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397 | /* find the longest file name, use that as the column width */
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398 | for (i = 0; i < nfiles; i++) {
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399 | int len = strlen(dn[i]->name);
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400 | if (column_width < len)
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401 | column_width = len;
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402 | }
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403 | column_width += tabstops +
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404 | USE_SELINUX( ((all_fmt & LIST_CONTEXT) ? 33 : 0) + )
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405 | ((all_fmt & LIST_INO) ? 8 : 0) +
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406 | ((all_fmt & LIST_BLOCKS) ? 5 : 0);
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407 | ncols = (int) (terminal_width / column_width);
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408 | }
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409 |
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410 | if (ncols > 1) {
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411 | nrows = nfiles / ncols;
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412 | if (nrows * ncols < nfiles)
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413 | nrows++; /* round up fractionals */
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414 | } else {
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415 | nrows = nfiles;
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416 | ncols = 1;
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417 | }
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418 |
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419 | for (row = 0; row < nrows; row++) {
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420 | for (nc = 0; nc < ncols; nc++) {
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421 | /* reach into the array based on the column and row */
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422 | i = (nc * nrows) + row; /* assume display by column */
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423 | if (all_fmt & DISP_ROWS)
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424 | i = (row * ncols) + nc; /* display across row */
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425 | if (i < nfiles) {
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426 | if (column > 0) {
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427 | nexttab -= column;
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428 | printf("%*s", nexttab, "");
|
---|
429 | column += nexttab;
|
---|
430 | }
|
---|
431 | nexttab = column + column_width;
|
---|
432 | column += list_single(dn[i]);
|
---|
433 | }
|
---|
434 | }
|
---|
435 | putchar('\n');
|
---|
436 | column = 0;
|
---|
437 | }
|
---|
438 | }
|
---|
439 |
|
---|
440 |
|
---|
441 | static void showdirs(struct dnode **dn, int ndirs, int first)
|
---|
442 | {
|
---|
443 | int i, nfiles;
|
---|
444 | struct dnode **subdnp;
|
---|
445 | int dndirs;
|
---|
446 | struct dnode **dnd;
|
---|
447 |
|
---|
448 | if (dn == NULL || ndirs < 1)
|
---|
449 | return;
|
---|
450 |
|
---|
451 | for (i = 0; i < ndirs; i++) {
|
---|
452 | if (all_fmt & (DISP_DIRNAME | DISP_RECURSIVE)) {
|
---|
453 | if (!first)
|
---|
454 | puts("");
|
---|
455 | first = 0;
|
---|
456 | printf("%s:\n", dn[i]->fullname);
|
---|
457 | }
|
---|
458 | subdnp = list_dir(dn[i]->fullname);
|
---|
459 | nfiles = countfiles(subdnp);
|
---|
460 | if (nfiles > 0) {
|
---|
461 | /* list all files at this level */
|
---|
462 | dnsort(subdnp, nfiles);
|
---|
463 | showfiles(subdnp, nfiles);
|
---|
464 | if (ENABLE_FEATURE_LS_RECURSIVE) {
|
---|
465 | if (all_fmt & DISP_RECURSIVE) {
|
---|
466 | /* recursive- list the sub-dirs */
|
---|
467 | dnd = splitdnarray(subdnp, nfiles, SPLIT_SUBDIR);
|
---|
468 | dndirs = countsubdirs(subdnp, nfiles);
|
---|
469 | if (dndirs > 0) {
|
---|
470 | dnsort(dnd, dndirs);
|
---|
471 | showdirs(dnd, dndirs, 0);
|
---|
472 | /* free the array of dnode pointers to the dirs */
|
---|
473 | free(dnd);
|
---|
474 | }
|
---|
475 | }
|
---|
476 | /* free the dnodes and the fullname mem */
|
---|
477 | dfree(subdnp, nfiles);
|
---|
478 | }
|
---|
479 | }
|
---|
480 | }
|
---|
481 | }
|
---|
482 |
|
---|
483 |
|
---|
484 | static struct dnode **list_dir(const char *path)
|
---|
485 | {
|
---|
486 | struct dnode *dn, *cur, **dnp;
|
---|
487 | struct dirent *entry;
|
---|
488 | DIR *dir;
|
---|
489 | int i, nfiles;
|
---|
490 |
|
---|
491 | if (path == NULL)
|
---|
492 | return NULL;
|
---|
493 |
|
---|
494 | dn = NULL;
|
---|
495 | nfiles = 0;
|
---|
496 | dir = warn_opendir(path);
|
---|
497 | if (dir == NULL) {
|
---|
498 | status = EXIT_FAILURE;
|
---|
499 | return NULL; /* could not open the dir */
|
---|
500 | }
|
---|
501 | while ((entry = readdir(dir)) != NULL) {
|
---|
502 | char *fullname;
|
---|
503 |
|
---|
504 | /* are we going to list the file- it may be . or .. or a hidden file */
|
---|
505 | if (entry->d_name[0] == '.') {
|
---|
506 | if ((!entry->d_name[1] || (entry->d_name[1] == '.' && !entry->d_name[2]))
|
---|
507 | && !(all_fmt & DISP_DOT)
|
---|
508 | ) {
|
---|
509 | continue;
|
---|
510 | }
|
---|
511 | if (!(all_fmt & DISP_HIDDEN))
|
---|
512 | continue;
|
---|
513 | }
|
---|
514 | fullname = concat_path_file(path, entry->d_name);
|
---|
515 | cur = my_stat(fullname, bb_basename(fullname), 0);
|
---|
516 | if (!cur) {
|
---|
517 | free(fullname);
|
---|
518 | continue;
|
---|
519 | }
|
---|
520 | cur->allocated = 1;
|
---|
521 | cur->next = dn;
|
---|
522 | dn = cur;
|
---|
523 | nfiles++;
|
---|
524 | }
|
---|
525 | closedir(dir);
|
---|
526 |
|
---|
527 | /* now that we know how many files there are
|
---|
528 | * allocate memory for an array to hold dnode pointers
|
---|
529 | */
|
---|
530 | if (dn == NULL)
|
---|
531 | return NULL;
|
---|
532 | dnp = dnalloc(nfiles);
|
---|
533 | for (i = 0, cur = dn; i < nfiles; i++) {
|
---|
534 | dnp[i] = cur; /* save pointer to node in array */
|
---|
535 | cur = cur->next;
|
---|
536 | }
|
---|
537 |
|
---|
538 | return dnp;
|
---|
539 | }
|
---|
540 |
|
---|
541 |
|
---|
542 | #if ENABLE_FEATURE_LS_TIMESTAMPS
|
---|
543 | /* Do time() just once. Saves one syscall per file for "ls -l" */
|
---|
544 | /* Initialized in main() */
|
---|
545 | static time_t current_time_t;
|
---|
546 | #endif
|
---|
547 |
|
---|
548 | static int list_single(struct dnode *dn)
|
---|
549 | {
|
---|
550 | int i, column = 0;
|
---|
551 |
|
---|
552 | #if ENABLE_FEATURE_LS_TIMESTAMPS
|
---|
553 | char *filetime;
|
---|
554 | time_t ttime, age;
|
---|
555 | #endif
|
---|
556 | #if ENABLE_FEATURE_LS_FILETYPES || ENABLE_FEATURE_LS_COLOR
|
---|
557 | struct stat info;
|
---|
558 | char append;
|
---|
559 | #endif
|
---|
560 |
|
---|
561 | if (dn->fullname == NULL)
|
---|
562 | return 0;
|
---|
563 |
|
---|
564 | #if ENABLE_FEATURE_LS_TIMESTAMPS
|
---|
565 | ttime = dn->dstat.st_mtime; /* the default time */
|
---|
566 | if (all_fmt & TIME_ACCESS)
|
---|
567 | ttime = dn->dstat.st_atime;
|
---|
568 | if (all_fmt & TIME_CHANGE)
|
---|
569 | ttime = dn->dstat.st_ctime;
|
---|
570 | filetime = ctime(&ttime);
|
---|
571 | #endif
|
---|
572 | #if ENABLE_FEATURE_LS_FILETYPES
|
---|
573 | append = append_char(dn->dstat.st_mode);
|
---|
574 | #endif
|
---|
575 |
|
---|
576 | for (i = 0; i <= 31; i++) {
|
---|
577 | switch (all_fmt & (1 << i)) {
|
---|
578 | case LIST_INO:
|
---|
579 | column += printf("%7ld ", (long) dn->dstat.st_ino);
|
---|
580 | break;
|
---|
581 | case LIST_BLOCKS:
|
---|
582 | column += printf("%4"OFF_FMT"d ", (off_t) dn->dstat.st_blocks >> 1);
|
---|
583 | break;
|
---|
584 | case LIST_MODEBITS:
|
---|
585 | column += printf("%-10s ", (char *) bb_mode_string(dn->dstat.st_mode));
|
---|
586 | break;
|
---|
587 | case LIST_NLINKS:
|
---|
588 | column += printf("%4ld ", (long) dn->dstat.st_nlink);
|
---|
589 | break;
|
---|
590 | case LIST_ID_NAME:
|
---|
591 | #if ENABLE_FEATURE_LS_USERNAME
|
---|
592 | printf("%-8.8s %-8.8s",
|
---|
593 | get_cached_username(dn->dstat.st_uid),
|
---|
594 | get_cached_groupname(dn->dstat.st_gid));
|
---|
595 | column += 17;
|
---|
596 | break;
|
---|
597 | #endif
|
---|
598 | case LIST_ID_NUMERIC:
|
---|
599 | column += printf("%-8d %-8d", dn->dstat.st_uid, dn->dstat.st_gid);
|
---|
600 | break;
|
---|
601 | case LIST_SIZE:
|
---|
602 | case LIST_DEV:
|
---|
603 | if (S_ISBLK(dn->dstat.st_mode) || S_ISCHR(dn->dstat.st_mode)) {
|
---|
604 | column += printf("%4d, %3d ", (int) major(dn->dstat.st_rdev),
|
---|
605 | (int) minor(dn->dstat.st_rdev));
|
---|
606 | } else {
|
---|
607 | if (all_fmt & LS_DISP_HR) {
|
---|
608 | column += printf("%9s ",
|
---|
609 | make_human_readable_str(dn->dstat.st_size, 1, 0));
|
---|
610 | } else {
|
---|
611 | column += printf("%9"OFF_FMT"d ", (off_t) dn->dstat.st_size);
|
---|
612 | }
|
---|
613 | }
|
---|
614 | break;
|
---|
615 | #if ENABLE_FEATURE_LS_TIMESTAMPS
|
---|
616 | case LIST_FULLTIME:
|
---|
617 | printf("%24.24s ", filetime);
|
---|
618 | column += 25;
|
---|
619 | break;
|
---|
620 | case LIST_DATE_TIME:
|
---|
621 | if ((all_fmt & LIST_FULLTIME) == 0) {
|
---|
622 | /* current_time_t ~== time(NULL) */
|
---|
623 | age = current_time_t - ttime;
|
---|
624 | printf("%6.6s ", filetime + 4);
|
---|
625 | if (age < 3600L * 24 * 365 / 2 && age > -15 * 60) {
|
---|
626 | /* hh:mm if less than 6 months old */
|
---|
627 | printf("%5.5s ", filetime + 11);
|
---|
628 | } else {
|
---|
629 | printf(" %4.4s ", filetime + 20);
|
---|
630 | }
|
---|
631 | column += 13;
|
---|
632 | }
|
---|
633 | break;
|
---|
634 | #endif
|
---|
635 | #if ENABLE_SELINUX
|
---|
636 | case LIST_CONTEXT:
|
---|
637 | {
|
---|
638 | char context[80];
|
---|
639 | int len = 0;
|
---|
640 |
|
---|
641 | if (dn->sid) {
|
---|
642 | /* I assume sid initilized with NULL */
|
---|
643 | len = strlen(dn->sid) + 1;
|
---|
644 | safe_strncpy(context, dn->sid, len);
|
---|
645 | freecon(dn->sid);
|
---|
646 | } else {
|
---|
647 | safe_strncpy(context, "unknown", 8);
|
---|
648 | }
|
---|
649 | printf("%-32s ", context);
|
---|
650 | column += MAX(33, len);
|
---|
651 | }
|
---|
652 | break;
|
---|
653 | #endif
|
---|
654 | case LIST_FILENAME:
|
---|
655 | errno = 0;
|
---|
656 | #if ENABLE_FEATURE_LS_COLOR
|
---|
657 | if (show_color && !lstat(dn->fullname, &info)) {
|
---|
658 | printf("\033[%d;%dm", bgcolor(info.st_mode),
|
---|
659 | fgcolor(info.st_mode));
|
---|
660 | }
|
---|
661 | #endif
|
---|
662 | column += printf("%s", dn->name);
|
---|
663 | if (show_color) {
|
---|
664 | printf("\033[0m");
|
---|
665 | }
|
---|
666 | break;
|
---|
667 | case LIST_SYMLINK:
|
---|
668 | if (S_ISLNK(dn->dstat.st_mode)) {
|
---|
669 | char *lpath = xmalloc_readlink_or_warn(dn->fullname);
|
---|
670 | if (!lpath) break;
|
---|
671 | printf(" -> ");
|
---|
672 | #if ENABLE_FEATURE_LS_FILETYPES || ENABLE_FEATURE_LS_COLOR
|
---|
673 | if (!stat(dn->fullname, &info)) {
|
---|
674 | append = append_char(info.st_mode);
|
---|
675 | }
|
---|
676 | #endif
|
---|
677 | #if ENABLE_FEATURE_LS_COLOR
|
---|
678 | if (show_color) {
|
---|
679 | errno = 0;
|
---|
680 | printf("\033[%d;%dm", bgcolor(info.st_mode),
|
---|
681 | fgcolor(info.st_mode));
|
---|
682 | }
|
---|
683 | #endif
|
---|
684 | column += printf("%s", lpath) + 4;
|
---|
685 | if (show_color) {
|
---|
686 | printf("\033[0m");
|
---|
687 | }
|
---|
688 | free(lpath);
|
---|
689 | }
|
---|
690 | break;
|
---|
691 | #if ENABLE_FEATURE_LS_FILETYPES
|
---|
692 | case LIST_FILETYPE:
|
---|
693 | if (append) {
|
---|
694 | putchar(append);
|
---|
695 | column++;
|
---|
696 | }
|
---|
697 | break;
|
---|
698 | #endif
|
---|
699 | }
|
---|
700 | }
|
---|
701 |
|
---|
702 | return column;
|
---|
703 | }
|
---|
704 |
|
---|
705 | /* "[-]Cadil1", POSIX mandated options, busybox always supports */
|
---|
706 | /* "[-]gnsx", POSIX non-mandated options, busybox always supports */
|
---|
707 | /* "[-]Ak" GNU options, busybox always supports */
|
---|
708 | /* "[-]FLRctur", POSIX mandated options, busybox optionally supports */
|
---|
709 | /* "[-]p", POSIX non-mandated options, busybox optionally supports */
|
---|
710 | /* "[-]SXvThw", GNU options, busybox optionally supports */
|
---|
711 | /* "[-]K", SELinux mandated options, busybox optionally supports */
|
---|
712 | /* "[-]e", I think we made this one up */
|
---|
713 | static const char ls_options[] ALIGN1 =
|
---|
714 | "Cadil1gnsxAk"
|
---|
715 | USE_FEATURE_LS_TIMESTAMPS("cetu")
|
---|
716 | USE_FEATURE_LS_SORTFILES("SXrv")
|
---|
717 | USE_FEATURE_LS_FILETYPES("Fp")
|
---|
718 | USE_FEATURE_LS_FOLLOWLINKS("L")
|
---|
719 | USE_FEATURE_LS_RECURSIVE("R")
|
---|
720 | USE_FEATURE_HUMAN_READABLE("h")
|
---|
721 | USE_SELINUX("K")
|
---|
722 | USE_FEATURE_AUTOWIDTH("T:w:")
|
---|
723 | USE_SELINUX("Z");
|
---|
724 |
|
---|
725 | enum {
|
---|
726 | LIST_MASK_TRIGGER = 0,
|
---|
727 | STYLE_MASK_TRIGGER = STYLE_MASK,
|
---|
728 | DISP_MASK_TRIGGER = DISP_ROWS,
|
---|
729 | SORT_MASK_TRIGGER = SORT_MASK,
|
---|
730 | };
|
---|
731 |
|
---|
732 | static const unsigned opt_flags[] = {
|
---|
733 | LIST_SHORT | STYLE_COLUMNS, /* C */
|
---|
734 | DISP_HIDDEN | DISP_DOT, /* a */
|
---|
735 | DISP_NOLIST, /* d */
|
---|
736 | LIST_INO, /* i */
|
---|
737 | LIST_LONG | STYLE_LONG, /* l - remember LS_DISP_HR in mask! */
|
---|
738 | LIST_SHORT | STYLE_SINGLE, /* 1 */
|
---|
739 | 0, /* g - ingored */
|
---|
740 | LIST_ID_NUMERIC, /* n */
|
---|
741 | LIST_BLOCKS, /* s */
|
---|
742 | DISP_ROWS, /* x */
|
---|
743 | DISP_HIDDEN, /* A */
|
---|
744 | ENABLE_SELINUX * LIST_CONTEXT, /* k (ignored if !SELINUX) */
|
---|
745 | #if ENABLE_FEATURE_LS_TIMESTAMPS
|
---|
746 | TIME_CHANGE | (ENABLE_FEATURE_LS_SORTFILES * SORT_CTIME), /* c */
|
---|
747 | LIST_FULLTIME, /* e */
|
---|
748 | ENABLE_FEATURE_LS_SORTFILES * SORT_MTIME, /* t */
|
---|
749 | TIME_ACCESS | (ENABLE_FEATURE_LS_SORTFILES * SORT_ATIME), /* u */
|
---|
750 | #endif
|
---|
751 | #if ENABLE_FEATURE_LS_SORTFILES
|
---|
752 | SORT_SIZE, /* S */
|
---|
753 | SORT_EXT, /* X */
|
---|
754 | SORT_REVERSE, /* r */
|
---|
755 | SORT_VERSION, /* v */
|
---|
756 | #endif
|
---|
757 | #if ENABLE_FEATURE_LS_FILETYPES
|
---|
758 | LIST_FILETYPE | LIST_EXEC, /* F */
|
---|
759 | LIST_FILETYPE, /* p */
|
---|
760 | #endif
|
---|
761 | #if ENABLE_FEATURE_LS_FOLLOWLINKS
|
---|
762 | FOLLOW_LINKS, /* L */
|
---|
763 | #endif
|
---|
764 | #if ENABLE_FEATURE_LS_RECURSIVE
|
---|
765 | DISP_RECURSIVE, /* R */
|
---|
766 | #endif
|
---|
767 | #if ENABLE_FEATURE_HUMAN_READABLE
|
---|
768 | LS_DISP_HR, /* h */
|
---|
769 | #endif
|
---|
770 | #if ENABLE_SELINUX
|
---|
771 | LIST_MODEBITS|LIST_NLINKS|LIST_CONTEXT|LIST_SIZE|LIST_DATE_TIME, /* K */
|
---|
772 | #endif
|
---|
773 | #if ENABLE_FEATURE_AUTOWIDTH
|
---|
774 | 0, 0, /* T, w - ignored */
|
---|
775 | #endif
|
---|
776 | #if ENABLE_SELINUX
|
---|
777 | LIST_MODEBITS|LIST_ID_NAME|LIST_CONTEXT, /* Z */
|
---|
778 | #endif
|
---|
779 | (1U<<31)
|
---|
780 | };
|
---|
781 |
|
---|
782 |
|
---|
783 | /* THIS IS A "SAFE" APPLET, main() MAY BE CALLED INTERNALLY FROM SHELL */
|
---|
784 | /* BE CAREFUL! */
|
---|
785 |
|
---|
786 | int ls_main(int argc, char **argv);
|
---|
787 | int ls_main(int argc, char **argv)
|
---|
788 | {
|
---|
789 | struct dnode **dnd;
|
---|
790 | struct dnode **dnf;
|
---|
791 | struct dnode **dnp;
|
---|
792 | struct dnode *dn;
|
---|
793 | struct dnode *cur;
|
---|
794 | unsigned opt;
|
---|
795 | int nfiles = 0;
|
---|
796 | int dnfiles;
|
---|
797 | int dndirs;
|
---|
798 | int oi;
|
---|
799 | int ac;
|
---|
800 | int i;
|
---|
801 | char **av;
|
---|
802 | USE_FEATURE_AUTOWIDTH(char *tabstops_str = NULL;)
|
---|
803 | USE_FEATURE_AUTOWIDTH(char *terminal_width_str = NULL;)
|
---|
804 | USE_FEATURE_LS_COLOR(char *color_opt;)
|
---|
805 |
|
---|
806 | #if ENABLE_FEATURE_LS_TIMESTAMPS
|
---|
807 | time(¤t_time_t);
|
---|
808 | #endif
|
---|
809 |
|
---|
810 | all_fmt = LIST_SHORT |
|
---|
811 | (ENABLE_FEATURE_LS_SORTFILES * (SORT_NAME | SORT_FORWARD));
|
---|
812 |
|
---|
813 | #if ENABLE_FEATURE_AUTOWIDTH
|
---|
814 | /* Obtain the terminal width */
|
---|
815 | get_terminal_width_height(STDIN_FILENO, &terminal_width, NULL);
|
---|
816 | /* Go one less... */
|
---|
817 | terminal_width--;
|
---|
818 | #endif
|
---|
819 |
|
---|
820 | /* process options */
|
---|
821 | USE_FEATURE_LS_COLOR(applet_long_options = ls_color_opt;)
|
---|
822 | #if ENABLE_FEATURE_AUTOWIDTH
|
---|
823 | opt = getopt32(argv, ls_options, &tabstops_str, &terminal_width_str
|
---|
824 | USE_FEATURE_LS_COLOR(, &color_opt));
|
---|
825 | if (tabstops_str)
|
---|
826 | tabstops = xatou(tabstops_str);
|
---|
827 | if (terminal_width_str)
|
---|
828 | terminal_width = xatou(terminal_width_str);
|
---|
829 | #else
|
---|
830 | opt = getopt32(argv, ls_options USE_FEATURE_LS_COLOR(, &color_opt));
|
---|
831 | #endif
|
---|
832 | for (i = 0; opt_flags[i] != (1U<<31); i++) {
|
---|
833 | if (opt & (1 << i)) {
|
---|
834 | unsigned flags = opt_flags[i];
|
---|
835 |
|
---|
836 | if (flags & LIST_MASK_TRIGGER)
|
---|
837 | all_fmt &= ~LIST_MASK;
|
---|
838 | if (flags & STYLE_MASK_TRIGGER)
|
---|
839 | all_fmt &= ~STYLE_MASK;
|
---|
840 | if (flags & SORT_MASK_TRIGGER)
|
---|
841 | all_fmt &= ~SORT_MASK;
|
---|
842 | if (flags & DISP_MASK_TRIGGER)
|
---|
843 | all_fmt &= ~DISP_MASK;
|
---|
844 | if (flags & TIME_MASK)
|
---|
845 | all_fmt &= ~TIME_MASK;
|
---|
846 | if (flags & LIST_CONTEXT)
|
---|
847 | all_fmt |= STYLE_SINGLE;
|
---|
848 | /* huh?? opt cannot be 'l' */
|
---|
849 | //if (LS_DISP_HR && opt == 'l')
|
---|
850 | // all_fmt &= ~LS_DISP_HR;
|
---|
851 | all_fmt |= flags;
|
---|
852 | }
|
---|
853 | }
|
---|
854 |
|
---|
855 | #if ENABLE_FEATURE_LS_COLOR
|
---|
856 | /* find color bit value - last position for short getopt */
|
---|
857 | if (ENABLE_FEATURE_LS_COLOR_IS_DEFAULT && isatty(STDOUT_FILENO)) {
|
---|
858 | char *p = getenv("LS_COLORS");
|
---|
859 | /* LS_COLORS is unset, or (not empty && not "none") ? */
|
---|
860 | if (!p || (p[0] && strcmp(p, "none")))
|
---|
861 | show_color = 1;
|
---|
862 | }
|
---|
863 | if (opt & (1 << i)) { /* next flag after short options */
|
---|
864 | if (!color_opt || !strcmp("always", color_opt))
|
---|
865 | show_color = 1;
|
---|
866 | else if (color_opt && !strcmp("never", color_opt))
|
---|
867 | show_color = 0;
|
---|
868 | else if (color_opt && !strcmp("auto", color_opt) && isatty(STDOUT_FILENO))
|
---|
869 | show_color = 1;
|
---|
870 | }
|
---|
871 | #endif
|
---|
872 |
|
---|
873 | /* sort out which command line options take precedence */
|
---|
874 | if (ENABLE_FEATURE_LS_RECURSIVE && (all_fmt & DISP_NOLIST))
|
---|
875 | all_fmt &= ~DISP_RECURSIVE; /* no recurse if listing only dir */
|
---|
876 | if (ENABLE_FEATURE_LS_TIMESTAMPS && ENABLE_FEATURE_LS_SORTFILES) {
|
---|
877 | if (all_fmt & TIME_CHANGE)
|
---|
878 | all_fmt = (all_fmt & ~SORT_MASK) | SORT_CTIME;
|
---|
879 | if (all_fmt & TIME_ACCESS)
|
---|
880 | all_fmt = (all_fmt & ~SORT_MASK) | SORT_ATIME;
|
---|
881 | }
|
---|
882 | if ((all_fmt & STYLE_MASK) != STYLE_LONG) /* only for long list */
|
---|
883 | all_fmt &= ~(LIST_ID_NUMERIC|LIST_FULLTIME|LIST_ID_NAME|LIST_ID_NUMERIC);
|
---|
884 | if (ENABLE_FEATURE_LS_USERNAME)
|
---|
885 | if ((all_fmt & STYLE_MASK) == STYLE_LONG && (all_fmt & LIST_ID_NUMERIC))
|
---|
886 | all_fmt &= ~LIST_ID_NAME; /* don't list names if numeric uid */
|
---|
887 |
|
---|
888 | /* choose a display format */
|
---|
889 | if (!(all_fmt & STYLE_MASK))
|
---|
890 | all_fmt |= (isatty(STDOUT_FILENO) ? STYLE_COLUMNS : STYLE_SINGLE);
|
---|
891 |
|
---|
892 | /*
|
---|
893 | * when there are no cmd line args we have to supply a default "." arg.
|
---|
894 | * we will create a second argv array, "av" that will hold either
|
---|
895 | * our created "." arg, or the real cmd line args. The av array
|
---|
896 | * just holds the pointers- we don't move the date the pointers
|
---|
897 | * point to.
|
---|
898 | */
|
---|
899 | ac = argc - optind; /* how many cmd line args are left */
|
---|
900 | if (ac < 1) {
|
---|
901 | static const char *const dotdir[] = { "." };
|
---|
902 |
|
---|
903 | av = (char **) dotdir;
|
---|
904 | ac = 1;
|
---|
905 | } else {
|
---|
906 | av = argv + optind;
|
---|
907 | }
|
---|
908 |
|
---|
909 | /* now, everything is in the av array */
|
---|
910 | if (ac > 1)
|
---|
911 | all_fmt |= DISP_DIRNAME; /* 2 or more items? label directories */
|
---|
912 |
|
---|
913 | /* stuff the command line file names into a dnode array */
|
---|
914 | dn = NULL;
|
---|
915 | for (oi = 0; oi < ac; oi++) {
|
---|
916 | /* ls w/o -l follows links on command line */
|
---|
917 | cur = my_stat(av[oi], av[oi], !(all_fmt & STYLE_LONG));
|
---|
918 | if (!cur)
|
---|
919 | continue;
|
---|
920 | cur->allocated = 0;
|
---|
921 | cur->next = dn;
|
---|
922 | dn = cur;
|
---|
923 | nfiles++;
|
---|
924 | }
|
---|
925 |
|
---|
926 | /* now that we know how many files there are
|
---|
927 | * allocate memory for an array to hold dnode pointers
|
---|
928 | */
|
---|
929 | dnp = dnalloc(nfiles);
|
---|
930 | for (i = 0, cur = dn; i < nfiles; i++) {
|
---|
931 | dnp[i] = cur; /* save pointer to node in array */
|
---|
932 | cur = cur->next;
|
---|
933 | }
|
---|
934 |
|
---|
935 | if (all_fmt & DISP_NOLIST) {
|
---|
936 | dnsort(dnp, nfiles);
|
---|
937 | if (nfiles > 0)
|
---|
938 | showfiles(dnp, nfiles);
|
---|
939 | } else {
|
---|
940 | dnd = splitdnarray(dnp, nfiles, SPLIT_DIR);
|
---|
941 | dnf = splitdnarray(dnp, nfiles, SPLIT_FILE);
|
---|
942 | dndirs = countdirs(dnp, nfiles);
|
---|
943 | dnfiles = nfiles - dndirs;
|
---|
944 | if (dnfiles > 0) {
|
---|
945 | dnsort(dnf, dnfiles);
|
---|
946 | showfiles(dnf, dnfiles);
|
---|
947 | if (ENABLE_FEATURE_CLEAN_UP)
|
---|
948 | free(dnf);
|
---|
949 | }
|
---|
950 | if (dndirs > 0) {
|
---|
951 | dnsort(dnd, dndirs);
|
---|
952 | showdirs(dnd, dndirs, dnfiles == 0);
|
---|
953 | if (ENABLE_FEATURE_CLEAN_UP)
|
---|
954 | free(dnd);
|
---|
955 | }
|
---|
956 | }
|
---|
957 | if (ENABLE_FEATURE_CLEAN_UP)
|
---|
958 | dfree(dnp, nfiles);
|
---|
959 | return status;
|
---|
960 | }
|
---|