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
35RCSID("$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
43typedef 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
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    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
91enum 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
98typedef struct {
99    Str	    extension;	/* file extension */
100    Str	    color;	/* color string */
101} Extension;
102
103static Extension *extensions = NULL;
104static size_t nextensions = 0;
105
106static char *colors = NULL;
107int	     color_context_ls = FALSE;	/* do colored ls */
108static int  color_context_lsmF = FALSE; /* do colored ls-F */
109
110static int getstring (char **, const Char **, Str *, int);
111static void put_color (const Str *);
112static void print_color (const Char *, size_t, Char);
113
114/* set_color_context():
115 */
116void
117set_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 */
143static	int
144getstring(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 */
171void
172parseLS_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 */
263static void
264put_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 */
280static void
281print_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 */
325void
326print_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 */
348