Mercurial > hg > toybox
annotate toys/posix/ls.c @ 1037:af1780148f7c draft
Implement ls --color=auto, suggested by Rich Felker.
author | Rob Landley <rob@landley.net> |
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date | Sun, 01 Sep 2013 08:00:41 -0500 |
parents | 422696039640 |
children | 7dfad5f21984 |
rev | line source |
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1 /* ls.c - list files |
458 | 2 * |
3 * Copyright 2012 Andre Renaud <andre@bluewatersys.com> | |
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4 * Copyright 2012 Rob Landley <rob@landley.net> |
458 | 5 * |
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6 * See http://opengroup.org/onlinepubs/9699919799/utilities/ls.html |
458 | 7 |
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8 USE_LS(NEWTOY(ls, USE_LS_COLOR("(color):;")"goACFHLRSacdfiklmnpqrstux1[-1Cglmnox][-cu][-ftS][-HL]", TOYFLAG_BIN)) |
458 | 9 |
10 config LS | |
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11 bool "ls" |
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12 default y |
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13 help |
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14 usage: ls [-ACFHLRSacdfiklmnpqrstux1] [directory...] |
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15 list files |
458 | 16 |
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17 what to show: |
939 | 18 -a all files including .hidden -c use ctime for timestamps |
19 -d directory, not contents -i inode number | |
20 -k block sizes in kilobytes -p put a '/' after dir names | |
21 -q unprintable chars as '?' -s size (in blocks) | |
22 -u use access time for timestamps -A list all files but . and .. | |
23 -H follow command line symlinks -L follow symlinks | |
24 -R recursively list files in subdirs -F append /dir *exe @sym |FIFO | |
584 | 25 |
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26 output formats: |
939 | 27 -1 list one file per line -C columns (sorted vertically) |
28 -g like -l but no owner -l long (show full details) | |
29 -m comma separated -n like -l but numeric uid/gid | |
30 -o like -l but no group -x columns (horizontal sort) | |
584 | 31 |
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32 sorting (default is alphabetical): |
939 | 33 -f unsorted -r reverse -t timestamp -S size |
940 | 34 |
35 config LS_COLOR | |
36 bool "ls --color" | |
37 default y | |
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38 depends on LS |
940 | 39 help |
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40 usage: ls --color[=auto] |
940 | 41 |
42 --color device=yellow symlink=turquoise/red dir=blue socket=purple | |
43 files: exe=green suid=red suidfile=redback stickydir=greenback | |
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44 =auto means detect if output is a tty. |
458 | 45 */ |
46 | |
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47 #define FOR_ls |
458 | 48 #include "toys.h" |
49 | |
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50 // test sst output (suid/sticky in ls flaglist) |
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51 |
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52 // ls -lR starts .: then ./subdir: |
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53 |
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54 GLOBALS( |
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55 char *color; |
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56 |
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57 struct dirtree *files; |
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58 |
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59 unsigned screen_width; |
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60 int nl_title; |
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61 |
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62 // group and user can make overlapping use of the utoa() buf, so move it |
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63 char uid_buf[12]; |
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64 ) |
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65 |
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66 void dlist_to_dirtree(struct dirtree *parent) |
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67 { |
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68 // Turn double_list into dirtree |
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69 struct dirtree *dt = parent->child; |
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70 if (dt) { |
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71 dt->parent->next = NULL; |
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72 while (dt) { |
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73 dt->parent = parent; |
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74 dt = dt->next; |
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75 } |
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76 } |
458 | 77 } |
78 | |
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79 static char endtype(struct stat *st) |
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80 { |
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81 mode_t mode = st->st_mode; |
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82 if ((toys.optflags&(FLAG_F|FLAG_p)) && S_ISDIR(mode)) return '/'; |
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83 if (toys.optflags & FLAG_F) { |
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84 if (S_ISLNK(mode)) return '@'; |
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85 if (S_ISREG(mode) && (mode&0111)) return '*'; |
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86 if (S_ISFIFO(mode)) return '|'; |
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87 if (S_ISSOCK(mode)) return '='; |
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88 } |
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89 return 0; |
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90 } |
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91 |
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92 static char *getusername(uid_t uid) |
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93 { |
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94 struct passwd *pw = getpwuid(uid); |
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95 utoa_to_buf(uid, TT.uid_buf, 12); |
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96 return pw ? pw->pw_name : TT.uid_buf; |
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97 } |
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98 |
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99 static char *getgroupname(gid_t gid) |
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100 { |
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101 struct group *gr = getgrgid(gid); |
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102 return gr ? gr->gr_name : utoa(gid); |
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103 } |
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104 |
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105 // Figure out size of printable entry fields for display indent/wrap |
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106 |
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107 static void entrylen(struct dirtree *dt, unsigned *len) |
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108 { |
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109 struct stat *st = &(dt->st); |
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110 unsigned flags = toys.optflags; |
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111 |
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112 *len = strlen(dt->name); |
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113 if (endtype(st)) ++*len; |
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114 if (flags & FLAG_m) ++*len; |
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115 |
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116 if (flags & FLAG_i) *len += (len[1] = numlen(st->st_ino)); |
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117 if (flags & (FLAG_l|FLAG_o|FLAG_n|FLAG_g)) { |
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118 unsigned fn = flags & FLAG_n; |
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119 len[2] = numlen(st->st_nlink); |
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120 len[3] = strlen(fn ? utoa(st->st_uid) : getusername(st->st_uid)); |
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121 len[4] = strlen(fn ? utoa(st->st_gid) : getgroupname(st->st_gid)); |
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122 if (S_ISBLK(st->st_mode) || S_ISCHR(st->st_mode)) { |
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123 // cheating slightly here: assuming minor is always 3 digits to avoid |
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124 // tracking another column |
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125 len[5] = numlen(major(st->st_rdev))+5; |
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126 } else len[5] = numlen(st->st_size); |
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127 } |
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128 if (flags & FLAG_s) *len += (len[6] = numlen(st->st_blocks)); |
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129 } |
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130 |
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131 static int compare(void *a, void *b) |
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132 { |
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133 struct dirtree *dta = *(struct dirtree **)a; |
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134 struct dirtree *dtb = *(struct dirtree **)b; |
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135 int ret = 0, reverse = (toys.optflags & FLAG_r) ? -1 : 1; |
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136 |
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137 if (toys.optflags & FLAG_S) { |
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138 if (dta->st.st_size > dtb->st.st_size) ret = -1; |
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139 else if (dta->st.st_size < dtb->st.st_size) ret = 1; |
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140 } |
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141 if (toys.optflags & FLAG_t) { |
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142 if (dta->st.st_mtime > dtb->st.st_mtime) ret = -1; |
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143 else if (dta->st.st_mtime < dtb->st.st_mtime) ret = 1; |
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144 } |
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145 if (!ret) ret = strcmp(dta->name, dtb->name); |
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146 return ret * reverse; |
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147 } |
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148 |
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149 // callback from dirtree_recurse() determining how to handle this entry. |
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150 |
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151 static int filter(struct dirtree *new) |
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152 { |
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153 int flags = toys.optflags; |
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154 |
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155 // Special case to handle enormous dirs without running out of memory. |
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156 if (flags == (FLAG_1|FLAG_f)) { |
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157 xprintf("%s\n", new->name); |
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158 return 0; |
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159 } |
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160 |
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161 if (flags & FLAG_u) new->st.st_mtime = new->st.st_atime; |
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162 if (flags & FLAG_c) new->st.st_mtime = new->st.st_ctime; |
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163 if (flags & FLAG_k) new->st.st_blocks = (new->st.st_blocks + 1) / 2; |
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164 |
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165 if (flags & (FLAG_a|FLAG_f)) return DIRTREE_SAVE; |
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166 if (!(flags & FLAG_A) && new->name[0]=='.') return 0; |
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167 |
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168 return dirtree_notdotdot(new) & DIRTREE_SAVE; |
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169 } |
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170 |
584 | 171 // For column view, calculate horizontal position (for padding) and return |
172 // index of next entry to display. | |
173 | |
174 static unsigned long next_column(unsigned long ul, unsigned long dtlen, | |
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175 unsigned columns, unsigned *xpos) |
584 | 176 { |
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177 unsigned long transition; |
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178 unsigned height, widecols; |
584 | 179 |
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180 // Horizontal sort is easy |
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181 if (!(toys.optflags & FLAG_C)) { |
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182 *xpos = ul % columns; |
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183 return ul; |
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184 } |
584 | 185 |
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186 // vertical sort |
584 | 187 |
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188 // For -x, calculate height of display, rounded up |
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189 height = (dtlen+columns-1)/columns; |
584 | 190 |
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191 // Sanity check: does wrapping render this column count impossible |
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192 // due to the right edge wrapping eating a whole row? |
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193 if (height*columns - dtlen >= height) { |
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194 *xpos = columns; |
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195 return 0; |
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196 } |
584 | 197 |
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198 // Uneven rounding goes along right edge |
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199 widecols = dtlen % height; |
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200 if (!widecols) widecols = height; |
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201 transition = widecols * columns; |
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202 if (ul < transition) { |
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203 *xpos = ul % columns; |
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204 return (*xpos*height) + (ul/columns); |
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205 } |
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207 ul -= transition; |
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208 *xpos = ul % (columns-1); |
584 | 209 |
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210 return (*xpos*height) + widecols + (ul/(columns-1)); |
584 | 211 } |
212 | |
940 | 213 int color_from_mode(mode_t mode) |
214 { | |
215 int color = 0; | |
216 | |
217 if (S_ISDIR(mode)) color = 256+34; | |
218 else if (S_ISLNK(mode)) color = 256+36; | |
219 else if (S_ISBLK(mode) || S_ISCHR(mode)) color = 256+33; | |
220 else if (S_ISREG(mode) && (mode&0111)) color = 256+32; | |
221 else if (S_ISFIFO(mode)) color = 33; | |
222 else if (S_ISSOCK(mode)) color = 256+35; | |
223 | |
224 return color; | |
225 } | |
226 | |
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227 // Display a list of dirtree entries, according to current format |
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228 // Output types -1, -l, -C, or stream |
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229 |
573
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230 static void listfiles(int dirfd, struct dirtree *indir) |
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231 { |
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232 struct dirtree *dt, **sort = 0; |
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233 unsigned long dtlen = 0, ul = 0; |
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234 unsigned width, flags = toys.optflags, totals[7], len[7], |
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235 *colsizes = (unsigned *)(toybuf+260), columns = (sizeof(toybuf)-260)/4; |
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236 |
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237 memset(totals, 0, sizeof(totals)); |
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238 |
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239 // Silently descend into single directory listed by itself on command line. |
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240 // In this case only show dirname/total header when given -R. |
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241 if (!indir->parent) { |
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242 if (!(dt = indir->child)) return; |
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243 if (S_ISDIR(dt->st.st_mode) && !dt->next && !(flags & FLAG_d)) { |
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244 dt->extra = 1; |
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245 listfiles(open(dt->name, 0), dt); |
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246 return; |
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247 } |
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248 } else { |
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249 // Read directory contents. We dup() the fd because this will close it. |
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250 indir->data = dup(dirfd); |
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251 dirtree_recurse(indir, filter, (flags&FLAG_L)); |
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252 } |
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253 |
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254 // Copy linked list to array and sort it. Directories go in array because |
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255 // we visit them in sorted order. |
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256 |
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257 for (;;) { |
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258 for (dt = indir->child; dt; dt = dt->next) { |
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259 if (sort) sort[dtlen] = dt; |
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260 dtlen++; |
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261 } |
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262 if (sort) break; |
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263 sort = xmalloc(dtlen * sizeof(void *)); |
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264 dtlen = 0; |
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265 continue; |
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266 } |
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267 |
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268 // Label directory if not top of tree, or if -R |
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269 if (indir->parent && (!indir->extra || (flags & FLAG_R))) |
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270 { |
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271 char *path = dirtree_path(indir, 0); |
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272 |
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273 if (TT.nl_title++) xputc('\n'); |
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274 xprintf("%s:\n", path); |
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275 free(path); |
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276 } |
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277 |
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278 if (!(flags & FLAG_f)) qsort(sort, dtlen, sizeof(void *), (void *)compare); |
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279 |
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280 // Find largest entry in each field for display alignment |
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281 if (flags & (FLAG_C|FLAG_x)) { |
584 | 282 |
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283 // columns can't be more than toybuf can hold, or more than files, |
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284 // or > 1/2 screen width (one char filename, one space). |
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285 if (columns > TT.screen_width/2) columns = TT.screen_width/2; |
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286 if (columns > dtlen) columns = dtlen; |
584 | 287 |
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288 // Try to fit as many columns as we can, dropping down by one each time |
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289 for (;columns > 1; columns--) { |
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290 unsigned c, totlen = columns; |
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291 |
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292 memset(colsizes, 0, columns*sizeof(unsigned)); |
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293 for (ul=0; ul<dtlen; ul++) { |
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294 entrylen(sort[next_column(ul, dtlen, columns, &c)], len); |
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295 if (c == columns) break; |
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296 // Does this put us over budget? |
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297 if (*len > colsizes[c]) { |
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298 totlen += *len-colsizes[c]; |
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299 colsizes[c] = *len; |
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300 if (totlen > TT.screen_width) break; |
584 | 301 } |
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302 } |
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303 // If it fit, stop here |
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304 if (ul == dtlen) break; |
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305 } |
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306 } else if (flags & (FLAG_l|FLAG_o|FLAG_n|FLAG_g|FLAG_s)) { |
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307 unsigned long blocks = 0; |
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308 |
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309 for (ul = 0; ul<dtlen; ul++) |
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310 { |
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311 entrylen(sort[ul], len); |
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312 for (width=0; width<6; width++) |
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313 if (len[width] > totals[width]) totals[width] = len[width]; |
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314 blocks += sort[ul]->st.st_blocks; |
573
c42ed3601b35
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315 } |
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316 |
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317 if (indir->parent) xprintf("total %lu\n", blocks); |
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318 } |
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319 |
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320 // Loop through again to produce output. |
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321 memset(toybuf, ' ', 256); |
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322 width = 0; |
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323 for (ul = 0; ul<dtlen; ul++) { |
940 | 324 unsigned curcol, color = 0; |
694
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325 unsigned long next = next_column(ul, dtlen, columns, &curcol); |
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326 struct stat *st = &(sort[next]->st); |
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327 mode_t mode = st->st_mode; |
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328 char et = endtype(st); |
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329 |
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330 // Skip directories at the top of the tree when -d isn't set |
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331 if (S_ISDIR(mode) && !indir->parent && !(flags & FLAG_d)) continue; |
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332 TT.nl_title=1; |
571 | 333 |
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334 // Handle padding and wrapping for display purposes |
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335 entrylen(sort[next], len); |
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336 if (ul) { |
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337 if (flags & FLAG_m) xputc(','); |
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338 if (flags & (FLAG_C|FLAG_x)) { |
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339 if (!curcol) xputc('\n'); |
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340 } else if ((flags & FLAG_1) || width+1+*len > TT.screen_width) { |
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341 xputc('\n'); |
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342 width = 0; |
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343 } else { |
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344 xputc(' '); |
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345 width++; |
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346 } |
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347 } |
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348 width += *len; |
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349 |
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350 if (flags & FLAG_i) xprintf("% *lu ", len[1], (unsigned long)st->st_ino); |
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351 if (flags & FLAG_s) xprintf("% *lu ", len[6], (unsigned long)st->st_blocks); |
565
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352 |
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353 if (flags & (FLAG_l|FLAG_o|FLAG_n|FLAG_g)) { |
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354 struct tm *tm; |
885
beb32d780164
Add library function for the file permission formatting in ls and stat
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355 char perm[11], thyme[64], *usr, *upad, *grp, *grpad; |
565
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356 |
916 | 357 mode_to_string(mode, perm); |
593
fb582378a36a
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358 |
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359 tm = localtime(&(st->st_mtime)); |
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360 strftime(thyme, sizeof(thyme), "%F %H:%M", tm); |
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361 |
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362 if (flags&FLAG_o) grp = grpad = toybuf+256; |
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363 else { |
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364 grp = (flags&FLAG_n) ? utoa(st->st_gid) : getgroupname(st->st_gid); |
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365 grpad = toybuf+256-(totals[4]-len[4]); |
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366 } |
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367 |
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368 if (flags&FLAG_g) usr = upad = toybuf+256; |
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369 else { |
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370 upad = toybuf+255-(totals[3]-len[3]); |
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371 if (flags&FLAG_n) { |
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372 usr = TT.uid_buf; |
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373 utoa_to_buf(st->st_uid, TT.uid_buf, 12); |
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374 } else usr = getusername(st->st_uid); |
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375 } |
565
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376 |
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377 // Coerce the st types into something we know we can print. |
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378 printf("%s% *ld %s%s%s%s", perm, totals[2]+1, (long)st->st_nlink, |
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379 usr, upad, grp, grpad); |
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380 |
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381 if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) |
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382 printf("% *d,% 4d", totals[5]-4, major(st->st_rdev),minor(st->st_rdev)); |
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383 else printf("% *"PRId64, totals[5]+1, (int64_t)st->st_size); |
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384 xprintf(" %s ", thyme); |
565
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385 } |
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386 |
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387 if (flags & FLAG_color) { |
940 | 388 color = color_from_mode(st->st_mode); |
389 if (color) printf("\033[%d;%dm", color>>8, color&255); | |
390 } | |
391 | |
694
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392 if (flags & FLAG_q) { |
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393 char *p; |
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394 for (p=sort[next]->name; *p; p++) xputc(isprint(*p) ? *p : '?'); |
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395 } else xprintf("%s", sort[next]->name); |
940 | 396 if (color) xprintf("\033[0m"); |
397 | |
398 if ((flags & (FLAG_l|FLAG_o|FLAG_n|FLAG_g)) && S_ISLNK(mode)) { | |
399 printf(" -> "); | |
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400 if (flags & FLAG_color) { |
940 | 401 struct stat st2; |
402 | |
403 if (fstatat(dirfd, sort[next]->symlink, &st2, 0)) color = 256+31; | |
404 else color = color_from_mode(st2.st_mode); | |
405 | |
406 if (color) printf("\033[%d;%dm", color>>8, color&255); | |
407 } | |
408 | |
409 printf("%s", sort[next]->symlink); | |
410 if (color) printf("\033[0m"); | |
411 } | |
565
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412 |
694
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413 if (et) xputc(et); |
571 | 414 |
694
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415 // Pad columns |
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416 if (flags & (FLAG_C|FLAG_x)) { |
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417 curcol = colsizes[curcol] - *len; |
937
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418 if (curcol < 255) xprintf("%s", toybuf+255-curcol); |
694
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419 } |
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420 } |
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421 |
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422 if (width) xputc('\n'); |
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423 |
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424 // Free directory entries, recursing first if necessary. |
571 | 425 |
694
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426 for (ul = 0; ul<dtlen; free(sort[ul++])) { |
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427 if ((flags & FLAG_d) || !S_ISDIR(sort[ul]->st.st_mode) |
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428 || !dirtree_notdotdot(sort[ul])) continue; |
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429 |
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430 // Recurse into dirs if at top of the tree or given -R |
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431 if (!indir->parent || (flags & FLAG_R)) |
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432 listfiles(openat(dirfd, sort[ul]->name, 0), sort[ul]); |
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433 } |
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434 free(sort); |
940 | 435 if (dirfd != AT_FDCWD) close(dirfd); |
565
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436 } |
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437 |
458 | 438 void ls_main(void) |
439 { | |
694
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440 char **s, *noargs[] = {".", 0}; |
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441 struct dirtree *dt; |
565
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442 |
940 | 443 TT.screen_width = 80; |
444 terminal_size(&TT.screen_width, NULL); | |
445 if (TT.screen_width<2) TT.screen_width = 2; | |
446 | |
694
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447 // Do we have an implied -1 |
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448 if (!isatty(1)) { |
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449 toys.optflags |= FLAG_1; |
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450 if (TT.color) toys.optflags ^= FLAG_color; |
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451 } else if (toys.optflags&(FLAG_l|FLAG_o|FLAG_n|FLAG_g)) |
694
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452 toys.optflags |= FLAG_1; |
940 | 453 else if (!(toys.optflags&(FLAG_1|FLAG_x|FLAG_m))) toys.optflags |= FLAG_C; |
694
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454 // The optflags parsing infrastructure should really do this for us, |
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455 // but currently it has "switch off when this is set", so "-dR" and "-Rd" |
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456 // behave differently |
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457 if (toys.optflags & FLAG_d) toys.optflags &= ~FLAG_R; |
565
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458 |
694
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459 // Iterate through command line arguments, collecting directories and files. |
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460 // Non-absolute paths are relative to current directory. |
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461 TT.files = dirtree_add_node(0, 0, 0); |
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462 for (s = *toys.optargs ? toys.optargs : noargs; *s; s++) { |
735
3aaba60133c8
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733
diff
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|
463 dt = dirtree_add_node(0, *s, |
694
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464 (toys.optflags & (FLAG_L|FLAG_H|FLAG_l))^FLAG_l); |
565
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465 |
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466 if (!dt) { |
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467 toys.exitval = 1; |
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468 continue; |
565
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469 } |
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470 |
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471 // Typecast means double_list->prev temporarirly goes in dirtree->parent |
733 | 472 dlist_add_nomalloc((void *)&TT.files->child, (struct double_list *)dt); |
694
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473 } |
565
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474 |
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475 // Turn double_list into dirtree |
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476 dlist_to_dirtree(TT.files); |
569
2e0367cb9585
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diff
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|
477 |
694
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
674
diff
changeset
|
478 // Display the files we collected |
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
674
diff
changeset
|
479 listfiles(AT_FDCWD, TT.files); |
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
674
diff
changeset
|
480 |
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
674
diff
changeset
|
481 if (CFG_TOYBOX_FREE) free(TT.files); |
458 | 482 } |