contrib/tcsh/tw.color.c

   1 /* $Header: /src/pub/tcsh/tw.color.c,v 1.11 2002/06/25 19:02:11 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("$Id: tw.color.c,v 1.11 2002/06/25 19:02:11 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     char   *s;
  45     int     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 };
  84
  85 enum FileType {
  86     VDir, VSym, VOrph, VPipe, VSock, VDoor, VBlock, VChr, VExe,
  87     VFile, VNormal, VMiss, VLeft, VRight, VEnd
  88 };
  89
  90 #define nvariables (sizeof(variables)/sizeof(variables[0]))
  91
  92 typedef struct {
  93     Str     extension;  /* file extension */
  94     Str     color;      /* color string */
  95 } Extension;
  96
  97 static Extension *extensions = NULL;
  98 static int nextensions = 0;
  99
 100 static char *colors = NULL;
 101 bool         color_context_ls = FALSE;  /* do colored ls */
 102 static bool  color_context_lsmF = FALSE;        /* do colored ls-F */
 103
 104 static bool getstring __P((char **, const Char **, Str *, int));
 105 static void put_color __P((Str *));
 106 static void print_color __P((Char *, size_t, int));
 107
 108 /* set_color_context():
 109  */
 110 void
 111 set_color_context()
 112 {
 113     struct varent *vp = adrof(STRcolor);
 114
 115     if (vp == NULL || vp->vec == NULL) {
 116         color_context_ls = FALSE;
 117         color_context_lsmF = FALSE;
 118     } else if (!vp->vec[0] || vp->vec[0][0] == '\0') {
 119         color_context_ls = TRUE;
 120         color_context_lsmF = TRUE;
 121     } else {
 122         size_t i;
 123
 124         color_context_ls = FALSE;
 125         color_context_lsmF = FALSE;
 126         for (i = 0; vp->vec[i]; i++)
 127             if (Strcmp(vp->vec[i], STRls) == 0)
 128                 color_context_ls = TRUE;
 129             else if (Strcmp(vp->vec[i], STRlsmF) == 0)
 130                 color_context_lsmF = TRUE;
 131     }
 132 }
 133
 134
 135 /* getstring():
 136  */
 137 static  bool
 138 getstring(dp, sp, pd, f)
 139     char        **dp;           /* dest buffer */
 140     const Char  **sp;           /* source buffer */
 141     Str          *pd;           /* pointer to dest buffer */
 142     int           f;            /* final character */
 143 {
 144     const Char *s = *sp;
 145     char *d = *dp;
 146     int sc;
 147
 148     while (*s && (*s & CHAR) != f && (*s & CHAR) != ':') {
 149         if ((*s & CHAR) == '\\' || (*s & CHAR) == '^') {
 150             if ((sc = parseescape(&s)) == -1)
 151                 return 0;
 152             else
 153                 *d++ = (char) sc;
 154         }
 155         else
 156             *d++ = *s++ & CHAR;
 157     }
 158
 159     pd->s = *dp;
 160     pd->len = (int) (d - *dp);
 161     *sp = s;
 162     *dp = d;
 163     return *s == f;
 164 }
 165
 166
 167 /* parseLS_COLORS():
 168  *      Parse the LS_COLORS environment variable
 169  */
 170 void
 171 parseLS_COLORS(value)
 172     Char   *value;              /* LS_COLOR variable's value */
 173 {
 174     int     i;
 175     size_t  len;
 176     const Char   *v;            /* pointer in value */
 177     char   *c;                  /* pointer in colors */
 178     Extension *e;               /* pointer in extensions */
 179     jmp_buf_t osetexit;
 180
 181     (void) &e;
 182
 183     /* init */
 184     if (extensions)
 185         xfree((ptr_t) extensions);
 186     for (i = 0; i < nvariables; i++)
 187         variables[i].color = variables[i].defaultcolor;
 188     colors = NULL;
 189     extensions = NULL;
 190     nextensions = 0;
 191
 192     if (value == NULL)
 193         return;
 194
 195     len = Strlen(value);
 196     /* allocate memory */
 197     i = 1;
 198     for (v = value; *v; v++)
 199         if ((*v & CHAR) == ':')
 200             i++;
 201     extensions = (Extension *) xmalloc((size_t) (len + i * sizeof(Extension)));
 202     colors = i * sizeof(Extension) + (char *)extensions;
 203     nextensions = 0;
 204
 205     /* init pointers */
 206     v = value;
 207     c = colors;
 208     e = &extensions[0];
 209
 210     /* Prevent from crashing if unknown parameters are given. */
 211
 212     getexit(osetexit);
 213
 214     if (setexit() == 0) {
 215
 216     /* parse */
 217     while (*v) {
 218         switch (*v & CHAR) {
 219         case ':':
 220             v++;
 221             continue;
 222
 223         case '*':               /* :*ext=color: */
 224             v++;
 225             if (getstring(&c, &v, &e->extension, '=') &&
 226                 0 < e->extension.len) {
 227                 v++;
 228                 getstring(&c, &v, &e->color, ':');
 229                 e++;
 230                 continue;
 231             }
 232             break;
 233
 234         default:                /* :vl=color: */
 235             if (v[0] && v[1] && (v[2] & CHAR) == '=') {
 236                 for (i = 0; i < nvariables; i++)
 237                     if (variables[i].variable[0] == (v[0] & CHAR) &&
 238                         variables[i].variable[1] == (v[1] & CHAR))
 239                         break;
 240                 if (i < nvariables) {
 241                     v += 3;
 242                     getstring(&c, &v, &variables[i].color, ':');
 243                     continue;
 244                 }
 245                 else
 246                     stderror(ERR_BADCOLORVAR, v[0], v[1]);
 247             }
 248             break;
 249         }
 250         while (*v && (*v & CHAR) != ':')
 251             v++;
 252     }
 253     }
 254
 255     resexit(osetexit);
 256
 257     nextensions = (int) (e - extensions);
 258 }
 259
 260
 261 /* put_color():
 262  */
 263 static void
 264 put_color(color)
 265     Str    *color;
 266 {
 267     extern bool output_raw;     /* PWP: in sh.print.c */
 268     size_t  i;
 269     char   *c = color->s;
 270     bool    original_output_raw = output_raw;
 271
 272     output_raw = TRUE;
 273     for (i = color->len; 0 < i; i--)
 274         xputchar(*c++);
 275     output_raw = original_output_raw;
 276 }
 277
 278
 279 /* print_color():
 280  */
 281 static void
 282 print_color(fname, len, suffix)
 283     Char   *fname;
 284     size_t  len;
 285     int     suffix;
 286 {
 287     int     i;
 288     char   *filename = short2str(fname);
 289     char   *last = filename + len;
 290     Str    *color = &variables[VFile].color;
 291
 292     switch (suffix) {
 293     case '>':                   /* File is a symbolic link pointing to
 294                                  * a directory */
 295         color = &variables[VDir].color;
 296             break;
 297     case '+':                   /* File is a hidden directory [aix] or
 298                                  * context dependent [hpux] */
 299     case ':':                   /* File is network special [hpux] */
 300         break;
 301     default:
 302         for (i = 0; i < nvariables; i++)
 303             if (variables[i].suffix != NOS &&
 304                 variables[i].suffix == suffix) {
 305                 color = &variables[i].color;
 306                 break;
 307             }
 308         if (i == nvariables) {
 309             for (i = 0; i < nextensions; i++)
 310                 if (strncmp(last - extensions[i].extension.len,
 311                             extensions[i].extension.s,
 312                             extensions[i].extension.len) == 0) {
 313                   color = &extensions[i].color;
 314                 break;
 315             }
 316         }
 317         break;
 318     }
 319
 320     put_color(&variables[VLeft].color);
 321     put_color(color);
 322     put_color(&variables[VRight].color);
 323 }
 324
 325
 326 /* print_with_color():
 327  */
 328 void
 329 print_with_color(filename, len, suffix)
 330     Char   *filename;
 331     size_t  len;
 332     int    suffix;
 333 {
 334     if (color_context_lsmF &&
 335         (haderr ? (didfds ? is2atty : isdiagatty) :
 336          (didfds ? is1atty : isoutatty))) {
 337         print_color(filename, len, suffix);
 338         xprintf("%S", filename);
 339         if (0 < variables[VEnd].color.len)
 340             put_color(&variables[VEnd].color);
 341         else {
 342             put_color(&variables[VLeft].color);
 343             put_color(&variables[VNormal].color);
 344             put_color(&variables[VRight].color);
 345         }
 346         xputchar(suffix);
 347     }
 348     else
 349         xprintf("%S%c", filename, suffix);
 350 }
 351
 352
 353 #endif /* COLOR_LS_F */