Mercurial > hg > toybox
annotate toys/ls.c @ 569:2e0367cb9585
More work on ls. Now ls -lR sort of works-ish.
author | Rob Landley <rob@landley.net> |
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date | Sun, 22 Apr 2012 23:01:23 -0500 |
parents | 44abf4d901f3 |
children | 83702597fd31 |
rev | line source |
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458 | 1 /* vi: set sw=4 ts=4: |
2 * | |
3 * ls.c - list files | |
4 * | |
5 * Copyright 2012 Andre Renaud <andre@bluewatersys.com> | |
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6 * Copyright 2012 Rob Landley <rob@landley.net> |
458 | 7 * |
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8 * See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/ls.html |
458 | 9 |
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10 USE_LS(NEWTOY(ls, "ACFHLRSacdfiklmnpqrstux1", TOYFLAG_BIN)) |
458 | 11 |
12 config LS | |
13 bool "ls" | |
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14 default y |
458 | 15 help |
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16 usage: ls [-ACFHLRSacdfiklmnpqrstux1] [directory...] |
458 | 17 list files |
18 | |
514 | 19 -1 list one file per line |
458 | 20 -a list all files |
514 | 21 -A list all files except . and .. |
22 -F append a character as a file type indicator | |
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23 -l show full details for each file |
458 | 24 */ |
25 | |
26 #include "toys.h" | |
27 | |
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28 #define FLAG_1 (1<<0) |
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29 //#define FLAG_x (1<<1) |
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30 //#define FLAG_u (1<<2) |
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31 //#define FLAG_t (1<<3) |
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32 //#define FLAG_s (1<<4) |
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33 //#define FLAG_r (1<<5) |
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34 //#define FLAG_q (1<<6) |
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35 #define FLAG_p (1<<7) |
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36 //#define FLAG_n (1<<8) |
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37 #define FLAG_m (1<<9) |
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38 #define FLAG_l (1<<10) |
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39 //#define FLAG_k (1<<11) |
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40 #define FLAG_i (1<<12) |
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41 #define FLAG_f (1<<13) |
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42 #define FLAG_d (1<<14) |
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43 //#define FLAG_c (1<<15) |
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44 #define FLAG_a (1<<16) |
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45 //#define FLAG_S (1<<17) |
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46 #define FLAG_R (1<<18) |
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47 //#define FLAG_L (1<<19) |
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48 //#define FLAG_H (1<<20) |
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49 #define FLAG_F (1<<21) |
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50 //#define FLAG_C (1<<21) |
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51 #define FLAG_A (1<<22) |
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52 |
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53 // test sst output (suid/sticky in ls flaglist) |
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54 |
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55 // ls -lR starts .: then ./subdir: |
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56 |
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57 DEFINE_GLOBALS( |
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58 struct dirtree *files; |
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59 |
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60 unsigned width; |
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61 int again; |
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62 ) |
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63 |
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64 #define TT this.ls |
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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; |
476
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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) && !(toys.optflags & FLAG_F)) 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 return pw ? pw->pw_name : utoa(uid); |
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96 } |
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97 |
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98 static char *getgroupname(gid_t gid) |
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99 { |
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100 struct group *gr = getgrgid(gid); |
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101 return gr ? gr->gr_name : utoa(gid); |
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102 } |
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103 |
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104 // Figure out size of printable entry fields for display indent/wrap |
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105 |
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106 static void entrylen(struct dirtree *dt, unsigned *len) |
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107 { |
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108 struct stat *st = &(dt->st); |
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109 unsigned flags = toys.optflags; |
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110 |
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111 *len = strlen(dt->name); |
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112 if (endtype(st)) ++*len; |
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113 if (flags & FLAG_m) ++*len; |
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114 |
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115 if (flags & FLAG_i) *len += (len[1] = numlen(st->st_ino)); |
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116 if (flags & FLAG_l) { |
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117 len[2] = numlen(st->st_nlink); |
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118 len[3] = strlen(getusername(st->st_uid)); |
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119 len[4] = strlen(getgroupname(st->st_gid)); |
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120 len[5] = numlen(st->st_size); |
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121 } |
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122 } |
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123 |
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124 static int compare(void *a, void *b) |
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125 { |
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126 struct dirtree *dta = *(struct dirtree **)a; |
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127 struct dirtree *dtb = *(struct dirtree **)b; |
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128 |
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129 // TODO handle flags |
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130 return strcmp(dta->name, dtb->name); |
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131 } |
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132 |
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133 // callback from dirtree_recurse() determining how to handle this entry. |
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134 |
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135 static int filter(struct dirtree *new) |
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136 { |
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137 int flags = toys.optflags; |
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138 |
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139 // TODO should -1f print here to handle enormous dirs without runing |
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140 // out of mem? |
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141 |
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142 if (flags & FLAG_a) return DIRTREE_NORECURSE; |
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143 if (!(flags & FLAG_A) && new->name[0]=='.') |
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144 return DIRTREE_NOSAVE|DIRTREE_NORECURSE; |
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145 |
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146 return dirtree_isdotdot(new)|DIRTREE_NORECURSE; |
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147 } |
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148 |
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149 // Display a list of dirtree entries, according to current format |
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150 // Output types -1, -l, -C, or stream |
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151 |
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152 static void listfiles(struct dirtree *indir) |
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153 { |
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154 struct dirtree *dt, **sort = 0; |
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155 unsigned long dtlen = 0, ul = 0; |
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156 unsigned width, flags = toys.optflags, totals[6], len[6]; |
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157 int showdirs = 1; |
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158 |
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159 // Figure out if we should show directories and current directory name |
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160 if (indir == TT.files) showdirs = (flags & (FLAG_d|FLAG_R)); |
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161 if (indir != TT.files || (indir->parent && (flags & FLAG_R))) { |
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162 char *path = dirtree_path(indir, 0); |
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163 |
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164 if (TT.again++) xputc('\n'); |
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165 xprintf("%s:\n", path); |
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166 free(path); |
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167 } |
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168 |
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169 // Copy linked list to array and sort it. Directories go in array because |
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170 // we visit them in sorted order. |
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171 |
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172 for (;;) { |
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173 for (dt = indir->child; dt; dt = dt->next) { |
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174 if (sort) sort[dtlen] = dt; |
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175 dtlen++; |
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176 } |
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177 if (sort) break; |
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178 sort = xmalloc(dtlen * sizeof(void *)); |
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179 dtlen = 0; |
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180 continue; |
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181 } |
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182 |
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183 // This is wrong, should be blocks used not file count. |
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184 if (indir->parent && (flags & FLAG_l)) xprintf("total %lu\n", dtlen); |
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185 |
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186 if (!(flags & FLAG_f)) qsort(sort, dtlen, sizeof(void *), (void *)compare); |
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187 |
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188 // Find largest entry in each field for everything but -1 |
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189 |
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190 memset(totals, 0, 6*sizeof(unsigned)); |
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191 if ((flags & (FLAG_1|FLAG_l)) != FLAG_1) { |
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192 for (ul = 0; ul<dtlen; ul++) { |
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193 entrylen(sort[ul], len); |
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194 if (flags & FLAG_l) { |
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195 for (width=0; width<6; width++) |
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196 if (len[width] > totals[width]) totals[width] = len[width]; |
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197 //TODO } else if (flags & FLAG_C) { |
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198 } else if (*len > *totals) *totals = *len; |
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199 } |
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200 } |
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201 |
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202 // Loop through again to produce output. |
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203 width = 0; |
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204 memset(toybuf, ' ', 256); |
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205 for (ul = 0; ul<dtlen; ul++) { |
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206 struct stat *st = &(sort[ul]->st); |
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207 mode_t mode = st->st_mode; |
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208 char et = endtype(st); |
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209 |
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210 if (S_ISDIR(mode) && !showdirs) continue; |
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211 entrylen(sort[ul], len); |
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212 |
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213 if (ul) { |
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214 if (toys.optflags & FLAG_m) xputc(','); |
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215 if ((flags & FLAG_1) || width+1+*len > TT.width) { |
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216 xputc('\n'); |
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217 width = 0; |
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218 } else { |
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219 xputc(' '); |
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220 width++; |
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221 } |
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222 } |
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223 width += *len; |
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224 |
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225 if (flags & FLAG_i) |
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226 xprintf("% *lu ", len[1], (unsigned long)st->st_ino); |
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227 |
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228 if (flags & FLAG_l) { |
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229 struct tm *tm; |
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230 char perm[11], thyme[64], c, d; |
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231 int i, bit; |
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232 |
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233 perm[10]=0; |
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234 for (i=0; i<9; i++) { |
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235 bit = mode & (1<<i); |
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236 c = i%3; |
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237 if (!c && (mode & (1<<((d=i/3)+9)))) { |
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238 c = "tss"[d]; |
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239 if (!bit) c &= 0x20; |
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240 } else c = bit ? "xwr"[c] : '-'; |
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241 perm[9-i] = c; |
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242 } |
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243 |
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244 if (S_ISDIR(mode)) c = 'd'; |
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245 else if (S_ISBLK(mode)) c = 'b'; |
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246 else if (S_ISCHR(mode)) c = 'c'; |
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247 else if (S_ISLNK(mode)) c = 'l'; |
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248 else if (S_ISFIFO(mode)) c = 'p'; |
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249 else if (S_ISSOCK(mode)) c = 's'; |
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250 else c = '-'; |
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251 *perm = c; |
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252 |
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253 tm = localtime(&(st->st_mtime)); |
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254 strftime(thyme, sizeof(thyme), "%F %H:%M", tm); |
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255 |
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256 xprintf("%s% *d %s%s%s%s% *d %s ", perm, totals[2]+1, st->st_nlink, |
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257 getusername(st->st_uid), toybuf+255-(totals[3]-len[3]), |
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258 getgroupname(st->st_gid), toybuf+256-(totals[4]-len[4]), |
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259 totals[5]+1, st->st_size, thyme); |
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260 } |
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261 |
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262 xprintf("%s", sort[ul]->name); |
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263 if ((flags & FLAG_l) && S_ISLNK(mode)) |
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264 xprintf(" -> %s", sort[ul]->symlink); |
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265 |
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266 if (et) xputc(et); |
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267 } |
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268 |
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269 if (width) xputc('\n'); |
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270 |
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271 for (ul = 0; ul<dtlen; free(sort[ul++])) { |
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272 // TODO follow symlinks when? |
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273 if (!S_ISDIR(sort[ul]->st.st_mode) || dirtree_isdotdot(sort[ul])) |
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274 continue; |
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275 if (indir == TT.files || (flags & FLAG_R)) { |
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276 int fd = openat(indir->data, sort[ul]->name, 0); |
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277 |
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278 sort[ul]->data = dup(fd); |
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279 dirtree_recurse(sort[ul], filter); |
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280 sort[ul]->data = fd; |
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281 listfiles(sort[ul]); |
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282 } |
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283 } |
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284 free(sort); |
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285 if (indir->data != AT_FDCWD) close(indir->data); |
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286 } |
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287 |
458 | 288 void ls_main(void) |
289 { | |
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290 char **s, *noargs[] = {".", 0}; |
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291 struct dirtree *dt; |
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292 |
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293 // Do we have an implied -1 |
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294 if (!isatty(1) || (toys.optflags&FLAG_l)) toys.optflags |= FLAG_1; |
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295 else { |
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296 TT.width = 80; |
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297 terminal_size(&TT.width, NULL); |
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298 } |
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299 |
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300 // Iterate through command line arguments, collecting directories and files. |
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301 // Non-absolute paths are relative to current directory. |
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302 TT.files = dirtree_add_node(0, 0); |
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303 for (s = *toys.optargs ? toys.optargs : noargs; *s; s++) { |
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304 dt = dirtree_add_node(AT_FDCWD, *s); |
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305 |
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306 if (!dt) { |
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307 toys.exitval = 1; |
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308 continue; |
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309 } |
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310 |
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311 // Typecast means double_list->prev temporarirly goes in dirtree->parent |
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312 dlist_add_nomalloc((struct double_list **)&TT.files->child, |
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313 (struct double_list *)dt); |
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314 } |
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315 |
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316 if (!TT.files->child) return; |
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317 |
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318 // Turn double_list into dirtree |
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319 dlist_to_dirtree(TT.files); |
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320 |
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321 // Special case a single directory argument: silently descend into it. |
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322 dt = TT.files->child; |
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323 |
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324 if (S_ISDIR(dt->st.st_mode) && !dt->next && !(toys.optflags&FLAG_d)) { |
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325 int fd = open(dt->name, 0); |
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326 TT.files = dt; |
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327 dt->data = dup(fd); |
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328 dirtree_recurse(dt, filter); |
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329 dt->data = fd; |
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330 } else TT.files->data = AT_FDCWD; |
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331 |
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332 // Display the files we collected |
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333 listfiles(TT.files); |
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334 |
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335 if (CFG_TOYBOX_FREE) { |
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336 free(TT.files->parent); |
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337 free(TT.files); |
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338 } |
458 | 339 } |