contrib/tcsh-6/tw.color.c

   1 /* $Header: /p/tcsh/cvsroot/tcsh/tw.color.c,v 1.25 2008/10/17 19:57:33 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 1.25 2008/10/17 19:57:33 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     VAR(NOS, "rs", "0"),        /* Reset to normal color */
  89 };
  90
  91 enum FileType {
  92     VDir, VSym, VOrph, VPipe, VSock, VDoor, VBlock, VChr, VExe,
  93     VFile, VNormal, VMiss, VLeft, VRight, VEnd
  94 };
  95
  96 #define nvariables (sizeof(variables)/sizeof(variables[0]))
  97
  98 typedef struct {
  99     Str     extension;  /* file extension */
 100     Str     color;      /* color string */
 101 } Extension;
 102
 103 static Extension *extensions = NULL;
 104 static size_t nextensions = 0;
 105
 106 static char *colors = NULL;
 107 int          color_context_ls = FALSE;  /* do colored ls */
 108 static int  color_context_lsmF = FALSE; /* do colored ls-F */
 109
 110 static int getstring (char **, const Char **, Str *, int);
 111 static void put_color (const Str *);
 112 static void print_color (const Char *, size_t, Char);
 113
 114 /* set_color_context():
 115  */
 116 void
 117 set_color_context(void)
 118 {
 119     struct varent *vp = adrof(STRcolor);
 120
 121     if (vp == NULL || vp->vec == NULL) {
 122         color_context_ls = FALSE;
 123         color_context_lsmF = FALSE;
 124     } else if (!vp->vec[0] || vp->vec[0][0] == '\0') {
 125         color_context_ls = TRUE;
 126         color_context_lsmF = TRUE;
 127     } else {
 128         size_t i;
 129
 130         color_context_ls = FALSE;
 131         color_context_lsmF = FALSE;
 132         for (i = 0; vp->vec[i]; i++)
 133             if (Strcmp(vp->vec[i], STRls) == 0)
 134                 color_context_ls = TRUE;
 135             else if (Strcmp(vp->vec[i], STRlsmF) == 0)
 136                 color_context_lsmF = TRUE;
 137     }
 138 }
 139
 140
 141 /* getstring():
 142  */
 143 static  int
 144 getstring(char **dp, const Char **sp, Str *pd, int f)
 145 {
 146     const Char *s = *sp;
 147     char *d = *dp;
 148     eChar sc;
 149
 150     while (*s && (*s & CHAR) != (Char)f && (*s & CHAR) != ':') {
 151         if ((*s & CHAR) == '\\' || (*s & CHAR) == '^') {
 152             if ((sc = parseescape(&s)) == CHAR_ERR)
 153                 return 0;
 154         }
 155         else
 156             sc = *s++ & CHAR;
 157         d += one_wctomb(d, sc);
 158     }
 159
 160     pd->s = *dp;
 161     pd->len = d - *dp;
 162     *sp = s;
 163     *dp = d;
 164     return *s == (Char)f;
 165 }
 166
 167
 168 /* parseLS_COLORS():
 169  *      Parse the LS_COLORS environment variable
 170  */
 171 void
 172 parseLS_COLORS(const Char *value)
 173 {
 174     size_t  i, len;
 175     const Char   *v;            /* pointer in value */
 176     char   *c;                  /* pointer in colors */
 177     Extension *volatile e;      /* pointer in extensions */
 178     jmp_buf_t osetexit;
 179     size_t omark;
 180
 181     (void) &e;
 182
 183     /* init */
 184     xfree(extensions);
 185     for (i = 0; i < nvariables; i++)
 186         variables[i].color = variables[i].defaultcolor;
 187     colors = NULL;
 188     extensions = NULL;
 189     nextensions = 0;
 190
 191     if (value == NULL)
 192         return;
 193
 194     len = Strlen(value);
 195     /* allocate memory */
 196     i = 1;
 197     for (v = value; *v; v++)
 198         if ((*v & CHAR) == ':')
 199             i++;
 200     extensions = xmalloc(len + i * sizeof(Extension));
 201     colors = i * sizeof(Extension) + (char *)extensions;
 202     nextensions = 0;
 203
 204     /* init pointers */
 205     v = value;
 206     c = colors;
 207     e = &extensions[0];
 208
 209     /* Prevent from crashing if unknown parameters are given. */
 210
 211     omark = cleanup_push_mark();
 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 ((Char)variables[i].variable[0] == (v[0] & CHAR) &&
 238                         (Char)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     cleanup_pop_mark(omark);
 256     resexit(osetexit);
 257
 258     nextensions = e - extensions;
 259 }
 260
 261 /* put_color():
 262  */
 263 static void
 264 put_color(const Str *color)
 265 {
 266     size_t  i;
 267     const char   *c = color->s;
 268     int    original_output_raw = output_raw;
 269
 270     output_raw = TRUE;
 271     cleanup_push(&original_output_raw, output_raw_restore);
 272     for (i = color->len; 0 < i; i--)
 273         xputchar(*c++);
 274     cleanup_until(&original_output_raw);
 275 }
 276
 277
 278 /* print_color():
 279  */
 280 static void
 281 print_color(const Char *fname, size_t len, Char suffix)
 282 {
 283     size_t  i;
 284     char   *filename = short2str(fname);
 285     char   *last = filename + len;
 286     Str    *color = &variables[VFile].color;
 287
 288     switch (suffix) {
 289     case '>':                   /* File is a symbolic link pointing to
 290                                  * a directory */
 291         color = &variables[VDir].color;
 292         break;
 293     case '+':                   /* File is a hidden directory [aix] or
 294                                  * context dependent [hpux] */
 295     case ':':                   /* File is network special [hpux] */
 296         break;
 297     default:
 298         for (i = 0; i < nvariables; i++)
 299             if (variables[i].suffix != NOS &&
 300                 (Char)variables[i].suffix == suffix) {
 301                 color = &variables[i].color;
 302                 break;
 303             }
 304         if (i == nvariables) {
 305             for (i = 0; i < nextensions; i++)
 306                 if (len >= extensions[i].extension.len
 307                     && strncmp(last - extensions[i].extension.len,
 308                                extensions[i].extension.s,
 309                                extensions[i].extension.len) == 0) {
 310                   color = &extensions[i].color;
 311                 break;
 312             }
 313         }
 314         break;
 315     }
 316
 317     put_color(&variables[VLeft].color);
 318     put_color(color);
 319     put_color(&variables[VRight].color);
 320 }
 321
 322
 323 /* print_with_color():
 324  */
 325 void
 326 print_with_color(const Char *filename, size_t len, Char suffix)
 327 {
 328     if (color_context_lsmF &&
 329         (haderr ? (didfds ? is2atty : isdiagatty) :
 330          (didfds ? is1atty : isoutatty))) {
 331         print_color(filename, len, suffix);
 332         xprintf("%S", filename);
 333         if (0 < variables[VEnd].color.len)
 334             put_color(&variables[VEnd].color);
 335         else {
 336             put_color(&variables[VLeft].color);
 337             put_color(&variables[VNormal].color);
 338             put_color(&variables[VRight].color);
 339         }
 340     }
 341     else
 342         xprintf("%S", filename);
 343     xputwchar(suffix);
 344 }
 345
 346
 347 #endif /* COLOR_LS_F */