tw.color.c revision 145479 
1/* $Header: /src/pub/tcsh/tw.color.c,v 1.18 2005/03/03 16:40:53 kim 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
35RCSID("$Id: tw.color.c,v 1.18 2005/03/03 16:40:53 kim Exp $")
36
37#include "tw.h"
38#include "ed.h"
39#include "tc.h"
40
41#ifdef COLOR_LS_F
42
43typedef struct {
44    const 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
56typedef struct {
57    const char suffix;
58    const char *variable;
59    Str     color;
60    Str     defaultcolor;
61} Variable;
62
63static 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
85enum 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
92typedef struct {
93    Str     extension;	/* file extension */
94    Str     color;	/* color string */
95} Extension;
96
97static Extension *extensions = NULL;
98static size_t nextensions = 0;
99
100static char *colors = NULL;
101int	     color_context_ls = FALSE;	/* do colored ls */
102static int  color_context_lsmF = FALSE;	/* do colored ls-F */
103
104static int getstring __P((char **, const Char **, Str *, int));
105static void put_color __P((Str *));
106static void print_color __P((Char *, size_t, Char));
107
108/* set_color_context():
109 */
110void
111set_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 */
137static  int
138getstring(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    eChar sc;
147
148    while (*s && (*s & CHAR) != (Char)f && (*s & CHAR) != ':') {
149	if ((*s & CHAR) == '\\' || (*s & CHAR) == '^') {
150	    if ((sc = parseescape(&s)) == CHAR_ERR)
151		return 0;
152	}
153	else
154	    sc = *s++ & CHAR;
155	d += one_wctomb(d, sc);
156    }
157
158    pd->s = *dp;
159    pd->len = (int) (d - *dp);
160    *sp = s;
161    *dp = d;
162    return *s == (Char)f;
163}
164
165
166/* parseLS_COLORS():
167 *	Parse the LS_COLORS environment variable
168 */
169void
170parseLS_COLORS(value)
171    Char   *value;		/* LS_COLOR variable's 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
179    (void) &e;
180
181    /* init */
182    if (extensions)
183        xfree((ptr_t) 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 = (Extension *) xmalloc((size_t) (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    getexit(osetexit);
211
212    if (setexit() == 0) {
213
214    /* parse */
215    while (*v) {
216	switch (*v & CHAR) {
217	case ':':
218	    v++;
219	    continue;
220
221	case '*':		/* :*ext=color: */
222	    v++;
223	    if (getstring(&c, &v, &e->extension, '=') &&
224		0 < e->extension.len) {
225		v++;
226		getstring(&c, &v, &e->color, ':');
227		e++;
228		continue;
229	    }
230	    break;
231
232	default:		/* :vl=color: */
233	    if (v[0] && v[1] && (v[2] & CHAR) == '=') {
234		for (i = 0; i < nvariables; i++)
235		    if ((Char)variables[i].variable[0] == (v[0] & CHAR) &&
236			(Char)variables[i].variable[1] == (v[1] & CHAR))
237			break;
238		if (i < nvariables) {
239		    v += 3;
240		    getstring(&c, &v, &variables[i].color, ':');
241		    continue;
242		}
243		else
244		    stderror(ERR_BADCOLORVAR, v[0], v[1]);
245	    }
246	    break;
247	}
248	while (*v && (*v & CHAR) != ':')
249	    v++;
250    }
251    }
252
253    resexit(osetexit);
254
255    nextensions = (int) (e - extensions);
256}
257
258
259/* put_color():
260 */
261static void
262put_color(color)
263    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    for (i = color->len; 0 < i; i--)
271	xputchar(*c++);
272    output_raw = original_output_raw;
273}
274
275
276/* print_color():
277 */
278static void
279print_color(fname, len, suffix)
280    Char   *fname;
281    size_t  len;
282    Char    suffix;
283{
284    size_t  i;
285    char   *filename = short2str(fname);
286    char   *last = filename + len;
287    Str    *color = &variables[VFile].color;
288
289    switch (suffix) {
290    case '>':			/* File is a symbolic link pointing to
291				 * a directory */
292        color = &variables[VDir].color;
293	    break;
294    case '+':			/* File is a hidden directory [aix] or
295				 * context dependent [hpux] */
296    case ':':			/* File is network special [hpux] */
297        break;
298    default:
299	for (i = 0; i < nvariables; i++)
300	    if (variables[i].suffix != NOS &&
301		(Char)variables[i].suffix == suffix) {
302		color = &variables[i].color;
303		break;
304	    }
305	if (i == nvariables) {
306	    for (i = 0; i < nextensions; i++)
307	        if (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 */
325void
326print_with_color(filename, len, suffix)
327    Char   *filename;
328    size_t  len;
329    Char    suffix;
330{
331    if (color_context_lsmF &&
332	(haderr ? (didfds ? is2atty : isdiagatty) :
333	 (didfds ? is1atty : isoutatty))) {
334	print_color(filename, len, suffix);
335	xprintf("%S", filename);
336	if (0 < variables[VEnd].color.len)
337	    put_color(&variables[VEnd].color);
338	else {
339	    put_color(&variables[VLeft].color);
340	    put_color(&variables[VNormal].color);
341	    put_color(&variables[VRight].color);
342	}
343    }
344    else
345	xprintf("%S", filename);
346    xputwchar(suffix);
347}
348
349
350#endif /* COLOR_LS_F */
351