contrib/tcsh-6/tw.color.c

   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 */