Mercurial > hg > toybox
annotate toys/posix/ls.c @ 941:62ba5ce62e9d 0.4.5
Make ls output major, minor for block devices.
author | Rob Landley <rob@landley.net> |
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date | Mon, 01 Jul 2013 00:10:28 -0500 |
parents | a425f97975d3 |
children | 422696039640 |
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 |
940 | 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 | |
38 help | |
39 usage: ls --color | |
40 | |
41 --color device=yellow symlink=turquoise/red dir=blue socket=purple | |
42 files: exe=green suid=red suidfile=redback stickydir=greenback | |
458 | 43 */ |
44 | |
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45 #define FOR_ls |
458 | 46 #include "toys.h" |
47 | |
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48 // test sst output (suid/sticky in ls flaglist) |
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49 |
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50 // ls -lR starts .: then ./subdir: |
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51 |
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52 GLOBALS( |
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53 struct dirtree *files; |
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54 |
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55 unsigned screen_width; |
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56 int nl_title; |
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57 |
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58 // group and user can make overlapping use of the utoa() buf, so move it |
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59 char uid_buf[12]; |
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60 ) |
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61 |
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62 void dlist_to_dirtree(struct dirtree *parent) |
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63 { |
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64 // Turn double_list into dirtree |
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65 struct dirtree *dt = parent->child; |
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66 if (dt) { |
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67 dt->parent->next = NULL; |
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68 while (dt) { |
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69 dt->parent = parent; |
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70 dt = dt->next; |
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71 } |
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72 } |
458 | 73 } |
74 | |
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75 static char endtype(struct stat *st) |
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76 { |
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77 mode_t mode = st->st_mode; |
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78 if ((toys.optflags&(FLAG_F|FLAG_p)) && S_ISDIR(mode)) return '/'; |
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79 if (toys.optflags & FLAG_F) { |
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80 if (S_ISLNK(mode)) return '@'; |
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81 if (S_ISREG(mode) && (mode&0111)) return '*'; |
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82 if (S_ISFIFO(mode)) return '|'; |
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83 if (S_ISSOCK(mode)) return '='; |
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84 } |
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85 return 0; |
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86 } |
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87 |
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88 static char *getusername(uid_t uid) |
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89 { |
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90 struct passwd *pw = getpwuid(uid); |
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91 utoa_to_buf(uid, TT.uid_buf, 12); |
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92 return pw ? pw->pw_name : TT.uid_buf; |
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93 } |
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94 |
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95 static char *getgroupname(gid_t gid) |
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96 { |
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97 struct group *gr = getgrgid(gid); |
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98 return gr ? gr->gr_name : utoa(gid); |
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99 } |
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100 |
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101 // Figure out size of printable entry fields for display indent/wrap |
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102 |
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103 static void entrylen(struct dirtree *dt, unsigned *len) |
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104 { |
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105 struct stat *st = &(dt->st); |
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106 unsigned flags = toys.optflags; |
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107 |
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108 *len = strlen(dt->name); |
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109 if (endtype(st)) ++*len; |
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110 if (flags & FLAG_m) ++*len; |
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111 |
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112 if (flags & FLAG_i) *len += (len[1] = numlen(st->st_ino)); |
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113 if (flags & (FLAG_l|FLAG_o|FLAG_n|FLAG_g)) { |
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114 unsigned fn = flags & FLAG_n; |
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115 len[2] = numlen(st->st_nlink); |
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116 len[3] = strlen(fn ? utoa(st->st_uid) : getusername(st->st_uid)); |
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117 len[4] = strlen(fn ? utoa(st->st_gid) : getgroupname(st->st_gid)); |
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118 if (S_ISBLK(st->st_mode) || S_ISCHR(st->st_mode)) { |
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119 // cheating slightly here: assuming minor is always 3 digits to avoid |
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120 // tracking another column |
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121 len[5] = numlen(major(st->st_rdev))+5; |
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122 } else len[5] = numlen(st->st_size); |
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123 } |
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124 if (flags & FLAG_s) *len += (len[6] = numlen(st->st_blocks)); |
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125 } |
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126 |
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127 static int compare(void *a, void *b) |
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128 { |
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129 struct dirtree *dta = *(struct dirtree **)a; |
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130 struct dirtree *dtb = *(struct dirtree **)b; |
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131 int ret = 0, reverse = (toys.optflags & FLAG_r) ? -1 : 1; |
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132 |
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133 if (toys.optflags & FLAG_S) { |
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134 if (dta->st.st_size > dtb->st.st_size) ret = -1; |
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135 else if (dta->st.st_size < dtb->st.st_size) ret = 1; |
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136 } |
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137 if (toys.optflags & FLAG_t) { |
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138 if (dta->st.st_mtime > dtb->st.st_mtime) ret = -1; |
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139 else if (dta->st.st_mtime < dtb->st.st_mtime) ret = 1; |
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140 } |
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141 if (!ret) ret = strcmp(dta->name, dtb->name); |
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142 return ret * reverse; |
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143 } |
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144 |
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145 // callback from dirtree_recurse() determining how to handle this entry. |
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146 |
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147 static int filter(struct dirtree *new) |
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148 { |
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149 int flags = toys.optflags; |
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150 |
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151 // Special case to handle enormous dirs without running out of memory. |
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152 if (flags == (FLAG_1|FLAG_f)) { |
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153 xprintf("%s\n", new->name); |
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154 return 0; |
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155 } |
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156 |
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157 if (flags & FLAG_u) new->st.st_mtime = new->st.st_atime; |
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158 if (flags & FLAG_c) new->st.st_mtime = new->st.st_ctime; |
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159 if (flags & FLAG_k) new->st.st_blocks = (new->st.st_blocks + 1) / 2; |
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160 |
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161 if (flags & (FLAG_a|FLAG_f)) return DIRTREE_SAVE; |
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162 if (!(flags & FLAG_A) && new->name[0]=='.') return 0; |
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163 |
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164 return dirtree_notdotdot(new) & DIRTREE_SAVE; |
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165 } |
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166 |
584 | 167 // For column view, calculate horizontal position (for padding) and return |
168 // index of next entry to display. | |
169 | |
170 static unsigned long next_column(unsigned long ul, unsigned long dtlen, | |
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171 unsigned columns, unsigned *xpos) |
584 | 172 { |
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173 unsigned long transition; |
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174 unsigned height, widecols; |
584 | 175 |
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176 // Horizontal sort is easy |
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177 if (!(toys.optflags & FLAG_C)) { |
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178 *xpos = ul % columns; |
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179 return ul; |
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180 } |
584 | 181 |
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182 // vertical sort |
584 | 183 |
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184 // For -x, calculate height of display, rounded up |
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185 height = (dtlen+columns-1)/columns; |
584 | 186 |
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187 // Sanity check: does wrapping render this column count impossible |
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188 // due to the right edge wrapping eating a whole row? |
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189 if (height*columns - dtlen >= height) { |
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190 *xpos = columns; |
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191 return 0; |
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192 } |
584 | 193 |
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194 // Uneven rounding goes along right edge |
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195 widecols = dtlen % height; |
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196 if (!widecols) widecols = height; |
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197 transition = widecols * columns; |
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198 if (ul < transition) { |
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199 *xpos = ul % columns; |
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200 return (*xpos*height) + (ul/columns); |
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201 } |
584 | 202 |
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203 ul -= transition; |
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204 *xpos = ul % (columns-1); |
584 | 205 |
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206 return (*xpos*height) + widecols + (ul/(columns-1)); |
584 | 207 } |
208 | |
940 | 209 int color_from_mode(mode_t mode) |
210 { | |
211 int color = 0; | |
212 | |
213 if (S_ISDIR(mode)) color = 256+34; | |
214 else if (S_ISLNK(mode)) color = 256+36; | |
215 else if (S_ISBLK(mode) || S_ISCHR(mode)) color = 256+33; | |
216 else if (S_ISREG(mode) && (mode&0111)) color = 256+32; | |
217 else if (S_ISFIFO(mode)) color = 33; | |
218 else if (S_ISSOCK(mode)) color = 256+35; | |
219 | |
220 return color; | |
221 } | |
222 | |
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223 // Display a list of dirtree entries, according to current format |
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224 // Output types -1, -l, -C, or stream |
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225 |
573
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226 static void listfiles(int dirfd, struct dirtree *indir) |
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227 { |
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228 struct dirtree *dt, **sort = 0; |
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229 unsigned long dtlen = 0, ul = 0; |
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230 unsigned width, flags = toys.optflags, totals[7], len[7], |
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231 *colsizes = (unsigned *)(toybuf+260), columns = (sizeof(toybuf)-260)/4; |
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232 |
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233 memset(totals, 0, sizeof(totals)); |
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234 |
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235 // Silently descend into single directory listed by itself on command line. |
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236 // In this case only show dirname/total header when given -R. |
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237 if (!indir->parent) { |
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238 if (!(dt = indir->child)) return; |
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239 if (S_ISDIR(dt->st.st_mode) && !dt->next && !(flags & FLAG_d)) { |
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240 dt->extra = 1; |
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241 listfiles(open(dt->name, 0), dt); |
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242 return; |
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243 } |
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244 } else { |
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245 // Read directory contents. We dup() the fd because this will close it. |
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246 indir->data = dup(dirfd); |
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247 dirtree_recurse(indir, filter, (flags&FLAG_L)); |
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248 } |
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249 |
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250 // Copy linked list to array and sort it. Directories go in array because |
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251 // we visit them in sorted order. |
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252 |
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253 for (;;) { |
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254 for (dt = indir->child; dt; dt = dt->next) { |
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255 if (sort) sort[dtlen] = dt; |
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256 dtlen++; |
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257 } |
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258 if (sort) break; |
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259 sort = xmalloc(dtlen * sizeof(void *)); |
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260 dtlen = 0; |
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261 continue; |
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262 } |
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263 |
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264 // Label directory if not top of tree, or if -R |
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265 if (indir->parent && (!indir->extra || (flags & FLAG_R))) |
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266 { |
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267 char *path = dirtree_path(indir, 0); |
593
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268 |
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269 if (TT.nl_title++) xputc('\n'); |
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270 xprintf("%s:\n", path); |
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271 free(path); |
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272 } |
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273 |
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274 if (!(flags & FLAG_f)) qsort(sort, dtlen, sizeof(void *), (void *)compare); |
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275 |
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276 // Find largest entry in each field for display alignment |
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277 if (flags & (FLAG_C|FLAG_x)) { |
584 | 278 |
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279 // columns can't be more than toybuf can hold, or more than files, |
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280 // or > 1/2 screen width (one char filename, one space). |
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281 if (columns > TT.screen_width/2) columns = TT.screen_width/2; |
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282 if (columns > dtlen) columns = dtlen; |
584 | 283 |
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284 // Try to fit as many columns as we can, dropping down by one each time |
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285 for (;columns > 1; columns--) { |
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286 unsigned c, totlen = columns; |
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287 |
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288 memset(colsizes, 0, columns*sizeof(unsigned)); |
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289 for (ul=0; ul<dtlen; ul++) { |
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290 entrylen(sort[next_column(ul, dtlen, columns, &c)], len); |
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291 if (c == columns) break; |
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292 // Does this put us over budget? |
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293 if (*len > colsizes[c]) { |
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294 totlen += *len-colsizes[c]; |
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295 colsizes[c] = *len; |
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296 if (totlen > TT.screen_width) break; |
584 | 297 } |
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298 } |
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299 // If it fit, stop here |
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300 if (ul == dtlen) break; |
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301 } |
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302 } else if (flags & (FLAG_l|FLAG_o|FLAG_n|FLAG_g|FLAG_s)) { |
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303 unsigned long blocks = 0; |
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304 |
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305 for (ul = 0; ul<dtlen; ul++) |
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306 { |
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307 entrylen(sort[ul], len); |
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308 for (width=0; width<6; width++) |
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309 if (len[width] > totals[width]) totals[width] = len[width]; |
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310 blocks += sort[ul]->st.st_blocks; |
573
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311 } |
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312 |
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313 if (indir->parent) xprintf("total %lu\n", blocks); |
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314 } |
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315 |
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316 // Loop through again to produce output. |
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317 memset(toybuf, ' ', 256); |
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318 width = 0; |
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319 for (ul = 0; ul<dtlen; ul++) { |
940 | 320 unsigned curcol, color = 0; |
694
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321 unsigned long next = next_column(ul, dtlen, columns, &curcol); |
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322 struct stat *st = &(sort[next]->st); |
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323 mode_t mode = st->st_mode; |
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324 char et = endtype(st); |
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325 |
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326 // Skip directories at the top of the tree when -d isn't set |
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327 if (S_ISDIR(mode) && !indir->parent && !(flags & FLAG_d)) continue; |
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328 TT.nl_title=1; |
571 | 329 |
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330 // Handle padding and wrapping for display purposes |
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331 entrylen(sort[next], len); |
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332 if (ul) { |
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333 if (flags & FLAG_m) xputc(','); |
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334 if (flags & (FLAG_C|FLAG_x)) { |
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335 if (!curcol) xputc('\n'); |
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336 } else if ((flags & FLAG_1) || width+1+*len > TT.screen_width) { |
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337 xputc('\n'); |
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338 width = 0; |
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339 } else { |
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340 xputc(' '); |
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341 width++; |
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342 } |
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343 } |
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344 width += *len; |
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345 |
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346 if (flags & FLAG_i) xprintf("% *lu ", len[1], (unsigned long)st->st_ino); |
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347 if (flags & FLAG_s) xprintf("% *lu ", len[6], (unsigned long)st->st_blocks); |
565
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348 |
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349 if (flags & (FLAG_l|FLAG_o|FLAG_n|FLAG_g)) { |
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350 struct tm *tm; |
885
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Add library function for the file permission formatting in ls and stat
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351 char perm[11], thyme[64], *usr, *upad, *grp, *grpad; |
565
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352 |
916 | 353 mode_to_string(mode, perm); |
593
fb582378a36a
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354 |
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355 tm = localtime(&(st->st_mtime)); |
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356 strftime(thyme, sizeof(thyme), "%F %H:%M", tm); |
593
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357 |
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358 if (flags&FLAG_o) grp = grpad = toybuf+256; |
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359 else { |
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360 grp = (flags&FLAG_n) ? utoa(st->st_gid) : getgroupname(st->st_gid); |
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361 grpad = toybuf+256-(totals[4]-len[4]); |
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362 } |
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363 |
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364 if (flags&FLAG_g) usr = upad = toybuf+256; |
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365 else { |
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366 upad = toybuf+255-(totals[3]-len[3]); |
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367 if (flags&FLAG_n) { |
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368 usr = TT.uid_buf; |
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369 utoa_to_buf(st->st_uid, TT.uid_buf, 12); |
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370 } else usr = getusername(st->st_uid); |
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371 } |
565
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372 |
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373 // Coerce the st types into something we know we can print. |
941
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374 printf("%s% *ld %s%s%s%s", perm, totals[2]+1, (long)st->st_nlink, |
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375 usr, upad, grp, grpad); |
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376 |
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377 if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) |
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378 printf("% *d,% 4d", totals[5]-4, major(st->st_rdev),minor(st->st_rdev)); |
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379 else printf("% *"PRId64, totals[5]+1, (int64_t)st->st_size); |
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380 xprintf(" %s ", thyme); |
565
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381 } |
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382 |
940 | 383 if ((flags & FLAG_color) && TT.screen_width) { |
384 color = color_from_mode(st->st_mode); | |
385 if (color) printf("\033[%d;%dm", color>>8, color&255); | |
386 } | |
387 | |
694
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388 if (flags & FLAG_q) { |
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389 char *p; |
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390 for (p=sort[next]->name; *p; p++) xputc(isprint(*p) ? *p : '?'); |
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391 } else xprintf("%s", sort[next]->name); |
940 | 392 if (color) xprintf("\033[0m"); |
393 | |
394 if ((flags & (FLAG_l|FLAG_o|FLAG_n|FLAG_g)) && S_ISLNK(mode)) { | |
395 printf(" -> "); | |
396 if ((flags & FLAG_color) && TT.screen_width) { | |
397 struct stat st2; | |
398 | |
399 if (fstatat(dirfd, sort[next]->symlink, &st2, 0)) color = 256+31; | |
400 else color = color_from_mode(st2.st_mode); | |
401 | |
402 if (color) printf("\033[%d;%dm", color>>8, color&255); | |
403 } | |
404 | |
405 printf("%s", sort[next]->symlink); | |
406 if (color) printf("\033[0m"); | |
407 } | |
565
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408 |
694
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409 if (et) xputc(et); |
571 | 410 |
694
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411 // Pad columns |
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412 if (flags & (FLAG_C|FLAG_x)) { |
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413 curcol = colsizes[curcol] - *len; |
937
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414 if (curcol < 255) xprintf("%s", toybuf+255-curcol); |
694
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415 } |
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416 } |
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417 |
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418 if (width) xputc('\n'); |
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419 |
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420 // Free directory entries, recursing first if necessary. |
571 | 421 |
694
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422 for (ul = 0; ul<dtlen; free(sort[ul++])) { |
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423 if ((flags & FLAG_d) || !S_ISDIR(sort[ul]->st.st_mode) |
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424 || !dirtree_notdotdot(sort[ul])) continue; |
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425 |
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426 // Recurse into dirs if at top of the tree or given -R |
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427 if (!indir->parent || (flags & FLAG_R)) |
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428 listfiles(openat(dirfd, sort[ul]->name, 0), sort[ul]); |
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429 } |
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430 free(sort); |
940 | 431 if (dirfd != AT_FDCWD) close(dirfd); |
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432 } |
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433 |
458 | 434 void ls_main(void) |
435 { | |
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436 char **s, *noargs[] = {".", 0}; |
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437 struct dirtree *dt; |
565
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438 |
940 | 439 TT.screen_width = 80; |
440 terminal_size(&TT.screen_width, NULL); | |
441 if (TT.screen_width<2) TT.screen_width = 2; | |
442 | |
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443 // Do we have an implied -1 |
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444 if (!isatty(1) || (toys.optflags&(FLAG_l|FLAG_o|FLAG_n|FLAG_g))) |
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445 toys.optflags |= FLAG_1; |
940 | 446 else if (!(toys.optflags&(FLAG_1|FLAG_x|FLAG_m))) toys.optflags |= FLAG_C; |
694
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447 // The optflags parsing infrastructure should really do this for us, |
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448 // but currently it has "switch off when this is set", so "-dR" and "-Rd" |
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449 // behave differently |
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450 if (toys.optflags & FLAG_d) toys.optflags &= ~FLAG_R; |
565
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451 |
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452 // Iterate through command line arguments, collecting directories and files. |
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453 // Non-absolute paths are relative to current directory. |
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454 TT.files = dirtree_add_node(0, 0, 0); |
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455 for (s = *toys.optargs ? toys.optargs : noargs; *s; s++) { |
735
3aaba60133c8
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456 dt = dirtree_add_node(0, *s, |
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457 (toys.optflags & (FLAG_L|FLAG_H|FLAG_l))^FLAG_l); |
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458 |
694
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459 if (!dt) { |
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460 toys.exitval = 1; |
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461 continue; |
565
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462 } |
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463 |
694
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464 // Typecast means double_list->prev temporarirly goes in dirtree->parent |
733 | 465 dlist_add_nomalloc((void *)&TT.files->child, (struct double_list *)dt); |
694
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466 } |
565
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467 |
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468 // Turn double_list into dirtree |
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469 dlist_to_dirtree(TT.files); |
569
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470 |
694
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471 // Display the files we collected |
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472 listfiles(AT_FDCWD, TT.files); |
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473 |
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474 if (CFG_TOYBOX_FREE) free(TT.files); |
458 | 475 } |