1 /* $Header: /p/tcsh/cvsroot/tcsh/tw.color.c,v 1.24 2006/03/02 18:46:45 christos Exp $ */ 2 /* 3 * tw.color.c: builtin color ls-F 4 */ 5 /*- 6 * Copyright (c) 1998 The Regents of the University of California. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 #include "sh.h" 34 35 RCSID("$tcsh: tw.color.c,v 1.24 2006/03/02 18:46:45 christos Exp $") 36 37 #include "tw.h" 38 #include "ed.h" 39 #include "tc.h" 40 41 #ifdef COLOR_LS_F 42 43 typedef struct { 44 const char *s; 45 size_t len; 46 } Str; 47 48 49 #define VAR(suffix,variable,defaultcolor) \ 50 { \ 51 suffix, variable, { defaultcolor, sizeof(defaultcolor) - 1 }, \ 52 { defaultcolor, sizeof(defaultcolor) - 1 } \ 53 } 54 #define NOS '\0' /* no suffix */ 55 56 typedef struct { 57 const char suffix; 58 const char *variable; 59 Str color; 60 Str defaultcolor; 61 } Variable; 62 63 static Variable variables[] = { 64 VAR('/', "di", "01;34"), /* Directory */ 65 VAR('@', "ln", "01;36"), /* Symbolic link */ 66 VAR('&', "or", ""), /* Orphanned symbolic link (defaults to ln) */ 67 VAR('|', "pi", "33"), /* Named pipe (FIFO) */ 68 VAR('=', "so", "01;35"), /* Socket */ 69 VAR('>', "do", "01;35"), /* Door (solaris fast ipc mechanism) */ 70 VAR('#', "bd", "01;33"), /* Block device */ 71 VAR('%', "cd", "01;33"), /* Character device */ 72 VAR('*', "ex", "01;32"), /* Executable file */ 73 VAR(NOS, "fi", "0"), /* Regular file */ 74 VAR(NOS, "no", "0"), /* Normal (non-filename) text */ 75 VAR(NOS, "mi", ""), /* Missing file (defaults to fi) */ 76 #ifdef IS_ASCII 77 VAR(NOS, "lc", "\033["), /* Left code (ASCII) */ 78 #else 79 VAR(NOS, "lc", "\x27["), /* Left code (EBCDIC)*/ 80 #endif 81 VAR(NOS, "rc", "m"), /* Right code */ 82 VAR(NOS, "ec", ""), /* End code (replaces lc+no+rc) */ 83 VAR(NOS, "su", ""), /* Setuid file (u+s) */ 84 VAR(NOS, "sg", ""), /* Setgid file (g+s) */ 85 VAR(NOS, "tw", ""), /* Sticky and other writable dir (+t,o+w) */ 86 VAR(NOS, "ow", ""), /* Other writable dir (o+w) but not sticky */ 87 VAR(NOS, "st", ""), /* Sticky dir (+t) but not other writable */ 88 }; 89 90 enum FileType { 91 VDir, VSym, VOrph, VPipe, VSock, VDoor, VBlock, VChr, VExe, 92 VFile, VNormal, VMiss, VLeft, VRight, VEnd 93 }; 94 95 #define nvariables (sizeof(variables)/sizeof(variables[0])) 96 97 typedef struct { 98 Str extension; /* file extension */ 99 Str color; /* color string */ 100 } Extension; 101 102 static Extension *extensions = NULL; 103 static size_t nextensions = 0; 104 105 static char *colors = NULL; 106 int color_context_ls = FALSE; /* do colored ls */ 107 static int color_context_lsmF = FALSE; /* do colored ls-F */ 108 109 static int getstring (char **, const Char **, Str *, int); 110 static void put_color (const Str *); 111 static void print_color (const Char *, size_t, Char); 112 113 /* set_color_context(): 114 */ 115 void 116 set_color_context(void) 117 { 118 struct varent *vp = adrof(STRcolor); 119 120 if (vp == NULL || vp->vec == NULL) { 121 color_context_ls = FALSE; 122 color_context_lsmF = FALSE; 123 } else if (!vp->vec[0] || vp->vec[0][0] == '\0') { 124 color_context_ls = TRUE; 125 color_context_lsmF = TRUE; 126 } else { 127 size_t i; 128 129 color_context_ls = FALSE; 130 color_context_lsmF = FALSE; 131 for (i = 0; vp->vec[i]; i++) 132 if (Strcmp(vp->vec[i], STRls) == 0) 133 color_context_ls = TRUE; 134 else if (Strcmp(vp->vec[i], STRlsmF) == 0) 135 color_context_lsmF = TRUE; 136 } 137 } 138 139 140 /* getstring(): 141 */ 142 static int 143 getstring(char **dp, const Char **sp, Str *pd, int f) 144 { 145 const Char *s = *sp; 146 char *d = *dp; 147 eChar sc; 148 149 while (*s && (*s & CHAR) != (Char)f && (*s & CHAR) != ':') { 150 if ((*s & CHAR) == '\\' || (*s & CHAR) == '^') { 151 if ((sc = parseescape(&s)) == CHAR_ERR) 152 return 0; 153 } 154 else 155 sc = *s++ & CHAR; 156 d += one_wctomb(d, sc); 157 } 158 159 pd->s = *dp; 160 pd->len = d - *dp; 161 *sp = s; 162 *dp = d; 163 return *s == (Char)f; 164 } 165 166 167 /* parseLS_COLORS(): 168 * Parse the LS_COLORS environment variable 169 */ 170 void 171 parseLS_COLORS(const Char *value) 172 { 173 size_t i, len; 174 const Char *v; /* pointer in value */ 175 char *c; /* pointer in colors */ 176 Extension *volatile e; /* pointer in extensions */ 177 jmp_buf_t osetexit; 178 size_t omark; 179 180 (void) &e; 181 182 /* init */ 183 xfree(extensions); 184 for (i = 0; i < nvariables; i++) 185 variables[i].color = variables[i].defaultcolor; 186 colors = NULL; 187 extensions = NULL; 188 nextensions = 0; 189 190 if (value == NULL) 191 return; 192 193 len = Strlen(value); 194 /* allocate memory */ 195 i = 1; 196 for (v = value; *v; v++) 197 if ((*v & CHAR) == ':') 198 i++; 199 extensions = xmalloc(len + i * sizeof(Extension)); 200 colors = i * sizeof(Extension) + (char *)extensions; 201 nextensions = 0; 202 203 /* init pointers */ 204 v = value; 205 c = colors; 206 e = &extensions[0]; 207 208 /* Prevent from crashing if unknown parameters are given. */ 209 210 omark = cleanup_push_mark(); 211 getexit(osetexit); 212 213 if (setexit() == 0) { 214 215 /* parse */ 216 while (*v) { 217 switch (*v & CHAR) { 218 case ':': 219 v++; 220 continue; 221 222 case '*': /* :*ext=color: */ 223 v++; 224 if (getstring(&c, &v, &e->extension, '=') && 225 0 < e->extension.len) { 226 v++; 227 getstring(&c, &v, &e->color, ':'); 228 e++; 229 continue; 230 } 231 break; 232 233 default: /* :vl=color: */ 234 if (v[0] && v[1] && (v[2] & CHAR) == '=') { 235 for (i = 0; i < nvariables; i++) 236 if ((Char)variables[i].variable[0] == (v[0] & CHAR) && 237 (Char)variables[i].variable[1] == (v[1] & CHAR)) 238 break; 239 if (i < nvariables) { 240 v += 3; 241 getstring(&c, &v, &variables[i].color, ':'); 242 continue; 243 } 244 else 245 stderror(ERR_BADCOLORVAR, v[0], v[1]); 246 } 247 break; 248 } 249 while (*v && (*v & CHAR) != ':') 250 v++; 251 } 252 } 253 254 cleanup_pop_mark(omark); 255 resexit(osetexit); 256 257 nextensions = e - extensions; 258 } 259 260 /* put_color(): 261 */ 262 static void 263 put_color(const Str *color) 264 { 265 size_t i; 266 const char *c = color->s; 267 int original_output_raw = output_raw; 268 269 output_raw = TRUE; 270 cleanup_push(&original_output_raw, output_raw_restore); 271 for (i = color->len; 0 < i; i--) 272 xputchar(*c++); 273 cleanup_until(&original_output_raw); 274 } 275 276 277 /* print_color(): 278 */ 279 static void 280 print_color(const Char *fname, size_t len, Char suffix) 281 { 282 size_t i; 283 char *filename = short2str(fname); 284 char *last = filename + len; 285 Str *color = &variables[VFile].color; 286 287 switch (suffix) { 288 case '>': /* File is a symbolic link pointing to 289 * a directory */ 290 color = &variables[VDir].color; 291 break; 292 case '+': /* File is a hidden directory [aix] or 293 * context dependent [hpux] */ 294 case ':': /* File is network special [hpux] */ 295 break; 296 default: 297 for (i = 0; i < nvariables; i++) 298 if (variables[i].suffix != NOS && 299 (Char)variables[i].suffix == suffix) { 300 color = &variables[i].color; 301 break; 302 } 303 if (i == nvariables) { 304 for (i = 0; i < nextensions; i++) 305 if (len >= extensions[i].extension.len 306 && strncmp(last - extensions[i].extension.len, 307 extensions[i].extension.s, 308 extensions[i].extension.len) == 0) { 309 color = &extensions[i].color; 310 break; 311 } 312 } 313 break; 314 } 315 316 put_color(&variables[VLeft].color); 317 put_color(color); 318 put_color(&variables[VRight].color); 319 } 320 321 322 /* print_with_color(): 323 */ 324 void 325 print_with_color(const Char *filename, size_t len, Char suffix) 326 { 327 if (color_context_lsmF && 328 (haderr ? (didfds ? is2atty : isdiagatty) : 329 (didfds ? is1atty : isoutatty))) { 330 print_color(filename, len, suffix); 331 xprintf("%S", filename); 332 if (0 < variables[VEnd].color.len) 333 put_color(&variables[VEnd].color); 334 else { 335 put_color(&variables[VLeft].color); 336 put_color(&variables[VNormal].color); 337 put_color(&variables[VRight].color); 338 } 339 } 340 else 341 xprintf("%S", filename); 342 xputwchar(suffix); 343 } 344 345 346 #endif /* COLOR_LS_F */ 347