tw.color.c revision 59415 
1/* $Header: /src/pub/tcsh/tw.color.c,v 1.6 2000/01/14 22:57:30 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. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *	This product includes software developed by the University of
20 *	California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 *    may be used to endorse or promote products derived from this software
23 *    without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 */
37#include "sh.h"
38
39RCSID("$Id: tw.color.c,v 1.6 2000/01/14 22:57:30 christos Exp $")
40
41#include "tw.h"
42#include "ed.h"
43#include "tc.h"
44
45#ifdef COLOR_LS_F
46
47typedef struct {
48    char   *s;
49    int     len;
50} Str;
51
52
53#define VAR(suffix,variable,defaultcolor) \
54{ \
55    suffix, variable, { defaultcolor, sizeof(defaultcolor) - 1 }, \
56      { defaultcolor, sizeof(defaultcolor) - 1 } \
57}
58#define NOS '\0' /* no suffix */
59
60typedef struct {
61    const char suffix;
62    const char *variable;
63    Str     color;
64    Str     defaultcolor;
65} Variable;
66
67static Variable variables[] = {
68    VAR('/', "di", "01;34"),	/* Directory */
69    VAR('@', "ln", "01;36"),	/* Symbolic link */
70    VAR('&', "or", ""),		/* Orphanned symbolic link (defaults to ln) */
71    VAR('|', "pi", "33"),	/* Named pipe (FIFO) */
72    VAR('=', "so", "01;35"),	/* Socket */
73    VAR('#', "bd", "01;33"),	/* Block device */
74    VAR('%', "cd", "01;33"),	/* Character device */
75    VAR('*', "ex", "01;32"),	/* Executable file */
76    VAR(NOS, "fi", "0"),	/* Regular file */
77    VAR(NOS, "no", "0"),	/* Normal (non-filename) text */
78    VAR(NOS, "mi", ""),		/* Missing file (defaults to fi) */
79#ifdef _OSD_POSIX
80    VAR(NOS, "lc", "\x27["),	/* Left code (EBCDIC)*/
81#else /* _OSD_POSIX */
82    VAR(NOS, "lc", "\033["),	/* Left code */
83#endif /* _OSD_POSIX */
84    VAR(NOS, "rc", "m"),	/* Right code */
85    VAR(NOS, "ec", ""),		/* End code (replaces lc+no+rc) */
86};
87
88enum FileType {
89    VDir, VSym, VOrph, VPipe, VSock, VBlock, VChr, VExe,
90    VFile, VNormal, VMiss, VLeft, VRight, VEnd
91};
92
93#define nvariables (sizeof(variables)/sizeof(variables[0]))
94
95typedef struct {
96    Str     extension;	/* file extension */
97    Str     color;	/* color string */
98} Extension;
99
100static Extension *extensions = NULL;
101static int nextensions = 0;
102
103static char *colors = NULL;
104bool	     color_context_ls = FALSE;	/* do colored ls */
105static bool  color_context_lsmF = FALSE;	/* do colored ls-F */
106
107static bool getstring __P((char **, const Char **, Str *, int));
108static void put_color __P((Str *));
109static void print_color __P((Char *, size_t, int));
110
111/* set_color_context():
112 */
113void
114set_color_context()
115{
116    struct varent *vp = adrof(STRcolor);
117
118    if (!vp) {
119	color_context_ls = FALSE;
120	color_context_lsmF = FALSE;
121    }
122    else if (!vp->vec[0] || vp->vec[0][0] == '\0') {
123	color_context_ls = TRUE;
124	color_context_lsmF = TRUE;
125    }
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 */
142static  bool
143getstring(dp, sp, pd, f)
144    char        **dp;		/* dest buffer */
145    const Char  **sp;		/* source buffer */
146    Str          *pd;		/* pointer to dest buffer */
147    int           f;		/* final character */
148{
149    const Char *s = *sp;
150    char *d = *dp;
151    int sc;
152
153    while (*s && (*s & CHAR) != f && (*s & CHAR) != ':') {
154	if ((*s & CHAR) == '\\' || (*s & CHAR) == '^') {
155	    if ((sc = parseescape(&s)) == -1)
156		return 0;
157	    else
158		*d++ = (char) sc;
159	}
160	else
161	    *d++ = *s++ & CHAR;
162    }
163
164    pd->s = *dp;
165    pd->len = (int) (d - *dp);
166    *sp = s;
167    *dp = d;
168    return *s == f;
169}
170
171
172/* parseLS_COLORS():
173 *	Parse the LS_COLORS environment variable
174 */
175void
176parseLS_COLORS(value)
177    Char   *value;		/* LS_COLOR variable's value */
178{
179    int     i;
180    size_t  len;
181    const Char   *v;		/* pointer in value */
182    char   *c;			/* pointer in colors */
183    Extension *e;		/* pointer in extensions */
184    jmp_buf_t osetexit;
185
186    /* init */
187    if (extensions)
188        xfree((ptr_t) extensions);
189    for (i = 0; i < nvariables; i++)
190	variables[i].color = variables[i].defaultcolor;
191    colors = NULL;
192    extensions = NULL;
193    nextensions = 0;
194
195    if (value == NULL)
196	return;
197
198    len = Strlen(value);
199    /* allocate memory */
200    i = 1;
201    for (v = value; *v; v++)
202	if ((*v & CHAR) == ':')
203	    i++;
204    extensions = (Extension *) xmalloc((size_t) (len + i * sizeof(Extension)));
205    colors = i * sizeof(Extension) + (char *)extensions;
206    nextensions = 0;
207
208    /* init pointers */
209    v = value;
210    c = colors;
211    e = &extensions[0];
212
213    /* Prevent from crashing if unknown parameters are given. */
214
215    getexit(osetexit);
216
217    if (setexit() == 0) {
218
219    /* parse */
220    while (*v) {
221	switch (*v & CHAR) {
222	case ':':
223	    v++;
224	    continue;
225
226	case '*':		/* :*ext=color: */
227	    v++;
228	    if (getstring(&c, &v, &e->extension, '=') &&
229		0 < e->extension.len) {
230		v++;
231		getstring(&c, &v, &e->color, ':');
232		e++;
233		continue;
234	    }
235	    break;
236
237	default:		/* :vl=color: */
238	    if (v[0] && v[1] && (v[2] & CHAR) == '=') {
239		for (i = 0; i < nvariables; i++)
240		    if (variables[i].variable[0] == (v[0] & CHAR) &&
241			variables[i].variable[1] == (v[1] & CHAR))
242			break;
243		if (i < nvariables) {
244		    v += 3;
245		    getstring(&c, &v, &variables[i].color, ':');
246		    continue;
247		}
248		else
249		    stderror(ERR_BADCOLORVAR, v[0], v[1]);
250	    }
251	    break;
252	}
253	while (*v && (*v & CHAR) != ':')
254	    v++;
255    }
256    }
257
258    resexit(osetexit);
259
260    nextensions = (int) (e - extensions);
261}
262
263
264/* put_color():
265 */
266static void
267put_color(color)
268    Str    *color;
269{
270    extern bool output_raw;	/* PWP: in sh.print.c */
271    size_t  i;
272    char   *c = color->s;
273    bool    original_output_raw = output_raw;
274
275    output_raw = TRUE;
276    for (i = color->len; 0 < i; i--)
277	xputchar(*c++);
278    output_raw = original_output_raw;
279}
280
281
282/* print_color():
283 */
284static void
285print_color(fname, len, suffix)
286    Char   *fname;
287    size_t  len;
288    int     suffix;
289{
290    int     i;
291    char   *filename = short2str(fname);
292    char   *last = filename + len;
293    Str    *color = &variables[VFile].color;
294
295    switch (suffix) {
296    case '>':			/* File is a symbolic link pointing to
297				 * a directory */
298        color = &variables[VDir].color;
299	    break;
300    case '+':			/* File is a hidden directory [aix] or
301				 * context dependent [hpux] */
302    case ':':			/* File is network special [hpux] */
303        break;
304    default:
305	for (i = 0; i < nvariables; i++)
306	    if (variables[i].suffix != NOS &&
307		variables[i].suffix == suffix) {
308		color = &variables[i].color;
309		break;
310	    }
311	if (i == nvariables) {
312	    for (i = 0; i < nextensions; i++)
313	        if (strncmp(last - extensions[i].extension.len,
314			    extensions[i].extension.s,
315			    extensions[i].extension.len) == 0) {
316		  color = &extensions[i].color;
317		break;
318	    }
319	}
320	break;
321    }
322
323    put_color(&variables[VLeft].color);
324    put_color(color);
325    put_color(&variables[VRight].color);
326}
327
328
329/* print_with_color():
330 */
331void
332print_with_color(filename, len, suffix)
333    Char   *filename;
334    size_t  len;
335    int    suffix;
336{
337    if (color_context_lsmF &&
338	(haderr ? (didfds ? is2atty : isdiagatty) :
339	 (didfds ? is1atty : isoutatty))) {
340	print_color(filename, len, suffix);
341	xprintf("%S", filename);
342	if (0 < variables[VEnd].color.len)
343	    put_color(&variables[VEnd].color);
344	else {
345	    put_color(&variables[VLeft].color);
346	    put_color(&variables[VNormal].color);
347	    put_color(&variables[VRight].color);
348	}
349	xputchar(suffix);
350    }
351    else
352	xprintf("%S%c", filename, suffix);
353}
354
355
356#endif /* COLOR_LS_F */
357