xref: /dflybsd-src/contrib/file/src/funcs.c (revision 739f0ef867128a933e021db3d831e906fcafd825)
1327e51cbSPeter Avalos /*
2327e51cbSPeter Avalos  * Copyright (c) Christos Zoulas 2003.
3327e51cbSPeter Avalos  * All Rights Reserved.
4327e51cbSPeter Avalos  *
5327e51cbSPeter Avalos  * Redistribution and use in source and binary forms, with or without
6327e51cbSPeter Avalos  * modification, are permitted provided that the following conditions
7327e51cbSPeter Avalos  * are met:
8327e51cbSPeter Avalos  * 1. Redistributions of source code must retain the above copyright
9327e51cbSPeter Avalos  *    notice immediately at the beginning of the file, without modification,
10327e51cbSPeter Avalos  *    this list of conditions, and the following disclaimer.
11327e51cbSPeter Avalos  * 2. Redistributions in binary form must reproduce the above copyright
12327e51cbSPeter Avalos  *    notice, this list of conditions and the following disclaimer in the
13327e51cbSPeter Avalos  *    documentation and/or other materials provided with the distribution.
14327e51cbSPeter Avalos  *
15327e51cbSPeter Avalos  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16327e51cbSPeter Avalos  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17327e51cbSPeter Avalos  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18327e51cbSPeter Avalos  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
19327e51cbSPeter Avalos  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20327e51cbSPeter Avalos  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21327e51cbSPeter Avalos  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22327e51cbSPeter Avalos  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23327e51cbSPeter Avalos  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24327e51cbSPeter Avalos  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25327e51cbSPeter Avalos  * SUCH DAMAGE.
26327e51cbSPeter Avalos  */
27327e51cbSPeter Avalos #include "file.h"
2879343712SPeter Avalos 
2979343712SPeter Avalos #ifndef	lint
30*3b9cdfa3SAntonio Huete Jimenez FILE_RCSID("@(#)$File: funcs.c,v 1.131 2022/09/13 18:46:07 christos Exp $")
3179343712SPeter Avalos #endif	/* lint */
3279343712SPeter Avalos 
33327e51cbSPeter Avalos #include "magic.h"
34e8af9738SPeter Avalos #include <assert.h>
35327e51cbSPeter Avalos #include <stdarg.h>
36327e51cbSPeter Avalos #include <stdlib.h>
37327e51cbSPeter Avalos #include <string.h>
38327e51cbSPeter Avalos #include <ctype.h>
39970935fdSSascha Wildner #ifdef HAVE_UNISTD_H
40970935fdSSascha Wildner #include <unistd.h>	/* for pipe2() */
41970935fdSSascha Wildner #endif
42327e51cbSPeter Avalos #if defined(HAVE_WCHAR_H)
43327e51cbSPeter Avalos #include <wchar.h>
44327e51cbSPeter Avalos #endif
45327e51cbSPeter Avalos #if defined(HAVE_WCTYPE_H)
46327e51cbSPeter Avalos #include <wctype.h>
47327e51cbSPeter Avalos #endif
48327e51cbSPeter Avalos #include <limits.h>
49327e51cbSPeter Avalos 
5079343712SPeter Avalos #ifndef SIZE_MAX
5179343712SPeter Avalos #define SIZE_MAX	((size_t)~0)
52327e51cbSPeter Avalos #endif
53327e51cbSPeter Avalos 
54c990e5baSDaniel Fojt protected char *
file_copystr(char * buf,size_t blen,size_t width,const char * str)55c990e5baSDaniel Fojt file_copystr(char *buf, size_t blen, size_t width, const char *str)
56c990e5baSDaniel Fojt {
57*3b9cdfa3SAntonio Huete Jimenez 	if (blen == 0)
58*3b9cdfa3SAntonio Huete Jimenez 		return buf;
59*3b9cdfa3SAntonio Huete Jimenez 	if (width >= blen)
60*3b9cdfa3SAntonio Huete Jimenez 		width = blen - 1;
61*3b9cdfa3SAntonio Huete Jimenez 	memcpy(buf, str, width);
62*3b9cdfa3SAntonio Huete Jimenez 	buf[width] = '\0';
63c990e5baSDaniel Fojt 	return buf;
64c990e5baSDaniel Fojt }
65c990e5baSDaniel Fojt 
66c990e5baSDaniel Fojt private void
file_clearbuf(struct magic_set * ms)67c990e5baSDaniel Fojt file_clearbuf(struct magic_set *ms)
68c990e5baSDaniel Fojt {
69c990e5baSDaniel Fojt 	free(ms->o.buf);
70c990e5baSDaniel Fojt 	ms->o.buf = NULL;
71c990e5baSDaniel Fojt 	ms->o.blen = 0;
72c990e5baSDaniel Fojt }
73c990e5baSDaniel Fojt 
74c990e5baSDaniel Fojt private int
file_checkfield(char * msg,size_t mlen,const char * what,const char ** pp)75c990e5baSDaniel Fojt file_checkfield(char *msg, size_t mlen, const char *what, const char **pp)
76c990e5baSDaniel Fojt {
77c990e5baSDaniel Fojt 	const char *p = *pp;
78c990e5baSDaniel Fojt 	int fw = 0;
79c990e5baSDaniel Fojt 
80c990e5baSDaniel Fojt 	while (*p && isdigit((unsigned char)*p))
81c990e5baSDaniel Fojt 		fw = fw * 10 + (*p++ - '0');
82c990e5baSDaniel Fojt 
83c990e5baSDaniel Fojt 	*pp = p;
84c990e5baSDaniel Fojt 
85c990e5baSDaniel Fojt 	if (fw < 1024)
86c990e5baSDaniel Fojt 		return 1;
87c990e5baSDaniel Fojt 	if (msg)
88c990e5baSDaniel Fojt 		snprintf(msg, mlen, "field %s too large: %d", what, fw);
89c990e5baSDaniel Fojt 
90c990e5baSDaniel Fojt 	return 0;
91c990e5baSDaniel Fojt }
92c990e5baSDaniel Fojt 
93c990e5baSDaniel Fojt protected int
file_checkfmt(char * msg,size_t mlen,const char * fmt)94c990e5baSDaniel Fojt file_checkfmt(char *msg, size_t mlen, const char *fmt)
95c990e5baSDaniel Fojt {
96*3b9cdfa3SAntonio Huete Jimenez 	const char *p;
97*3b9cdfa3SAntonio Huete Jimenez 	for (p = fmt; *p; p++) {
98c990e5baSDaniel Fojt 		if (*p != '%')
99c990e5baSDaniel Fojt 			continue;
100c990e5baSDaniel Fojt 		if (*++p == '%')
101c990e5baSDaniel Fojt 			continue;
102c990e5baSDaniel Fojt 		// Skip uninteresting.
103970935fdSSascha Wildner 		while (strchr("#0.'+- ", *p) != NULL)
104c990e5baSDaniel Fojt 			p++;
105c990e5baSDaniel Fojt 		if (*p == '*') {
106c990e5baSDaniel Fojt 			if (msg)
107c990e5baSDaniel Fojt 				snprintf(msg, mlen, "* not allowed in format");
108c990e5baSDaniel Fojt 			return -1;
109c990e5baSDaniel Fojt 		}
110c990e5baSDaniel Fojt 
111c990e5baSDaniel Fojt 		if (!file_checkfield(msg, mlen, "width", &p))
112c990e5baSDaniel Fojt 			return -1;
113c990e5baSDaniel Fojt 
114c990e5baSDaniel Fojt 		if (*p == '.') {
115c990e5baSDaniel Fojt 			p++;
116c990e5baSDaniel Fojt 			if (!file_checkfield(msg, mlen, "precision", &p))
117c990e5baSDaniel Fojt 				return -1;
118c990e5baSDaniel Fojt 		}
119c990e5baSDaniel Fojt 
120c990e5baSDaniel Fojt 		if (!isalpha((unsigned char)*p)) {
121c990e5baSDaniel Fojt 			if (msg)
122c990e5baSDaniel Fojt 				snprintf(msg, mlen, "bad format char: %c", *p);
123c990e5baSDaniel Fojt 			return -1;
124c990e5baSDaniel Fojt 		}
125c990e5baSDaniel Fojt 	}
126c990e5baSDaniel Fojt 	return 0;
127c990e5baSDaniel Fojt }
128c990e5baSDaniel Fojt 
129327e51cbSPeter Avalos /*
13079343712SPeter Avalos  * Like printf, only we append to a buffer.
131327e51cbSPeter Avalos  */
132327e51cbSPeter Avalos protected int
file_vprintf(struct magic_set * ms,const char * fmt,va_list ap)13379343712SPeter Avalos file_vprintf(struct magic_set *ms, const char *fmt, va_list ap)
13479343712SPeter Avalos {
13579343712SPeter Avalos 	int len;
13679343712SPeter Avalos 	char *buf, *newstr;
137c990e5baSDaniel Fojt 	char tbuf[1024];
13879343712SPeter Avalos 
139e8af9738SPeter Avalos 	if (ms->event_flags & EVENT_HAD_ERR)
140e8af9738SPeter Avalos 		return 0;
141c990e5baSDaniel Fojt 
142c990e5baSDaniel Fojt 	if (file_checkfmt(tbuf, sizeof(tbuf), fmt)) {
143c990e5baSDaniel Fojt 		file_clearbuf(ms);
144c990e5baSDaniel Fojt 		file_error(ms, 0, "Bad magic format `%s' (%s)", fmt, tbuf);
145c990e5baSDaniel Fojt 		return -1;
146c990e5baSDaniel Fojt 	}
147c990e5baSDaniel Fojt 
14879343712SPeter Avalos 	len = vasprintf(&buf, fmt, ap);
149c990e5baSDaniel Fojt 	if (len < 0 || (size_t)len > 1024 || len + ms->o.blen > 1024 * 1024) {
150c990e5baSDaniel Fojt 		size_t blen = ms->o.blen;
151c990e5baSDaniel Fojt 		free(buf);
152c990e5baSDaniel Fojt 		file_clearbuf(ms);
153*3b9cdfa3SAntonio Huete Jimenez 		file_error(ms, 0, "Output buffer space exceeded %d+%"
154*3b9cdfa3SAntonio Huete Jimenez 		    SIZE_T_FORMAT "u", len, blen);
155c990e5baSDaniel Fojt 		return -1;
156c990e5baSDaniel Fojt 	}
15779343712SPeter Avalos 
15879343712SPeter Avalos 	if (ms->o.buf != NULL) {
15979343712SPeter Avalos 		len = asprintf(&newstr, "%s%s", ms->o.buf, buf);
16079343712SPeter Avalos 		free(buf);
16179343712SPeter Avalos 		if (len < 0)
16279343712SPeter Avalos 			goto out;
16379343712SPeter Avalos 		free(ms->o.buf);
16479343712SPeter Avalos 		buf = newstr;
16579343712SPeter Avalos 	}
16679343712SPeter Avalos 	ms->o.buf = buf;
167c990e5baSDaniel Fojt 	ms->o.blen = len;
16879343712SPeter Avalos 	return 0;
16979343712SPeter Avalos out:
170c990e5baSDaniel Fojt 	file_clearbuf(ms);
171c990e5baSDaniel Fojt 	file_error(ms, errno, "vasprintf failed");
17279343712SPeter Avalos 	return -1;
17379343712SPeter Avalos }
17479343712SPeter Avalos 
17579343712SPeter Avalos protected int
file_printf(struct magic_set * ms,const char * fmt,...)176327e51cbSPeter Avalos file_printf(struct magic_set *ms, const char *fmt, ...)
177327e51cbSPeter Avalos {
17879343712SPeter Avalos 	int rv;
179327e51cbSPeter Avalos 	va_list ap;
180327e51cbSPeter Avalos 
181327e51cbSPeter Avalos 	va_start(ap, fmt);
18279343712SPeter Avalos 	rv = file_vprintf(ms, fmt, ap);
183327e51cbSPeter Avalos 	va_end(ap);
18479343712SPeter Avalos 	return rv;
185327e51cbSPeter Avalos }
186327e51cbSPeter Avalos 
187327e51cbSPeter Avalos /*
188327e51cbSPeter Avalos  * error - print best error message possible
189327e51cbSPeter Avalos  */
190327e51cbSPeter Avalos /*VARARGS*/
191e8af9738SPeter Avalos __attribute__((__format__(__printf__, 3, 0)))
192327e51cbSPeter Avalos private void
file_error_core(struct magic_set * ms,int error,const char * f,va_list va,size_t lineno)193327e51cbSPeter Avalos file_error_core(struct magic_set *ms, int error, const char *f, va_list va,
194f72f8299SJan Lentfer     size_t lineno)
195327e51cbSPeter Avalos {
196327e51cbSPeter Avalos 	/* Only the first error is ok */
19779343712SPeter Avalos 	if (ms->event_flags & EVENT_HAD_ERR)
198327e51cbSPeter Avalos 		return;
199327e51cbSPeter Avalos 	if (lineno != 0) {
200c990e5baSDaniel Fojt 		file_clearbuf(ms);
2016fca56fbSSascha Wildner 		(void)file_printf(ms, "line %" SIZE_T_FORMAT "u:", lineno);
202327e51cbSPeter Avalos 	}
203c30bd091SSascha Wildner 	if (ms->o.buf && *ms->o.buf)
2046fca56fbSSascha Wildner 		(void)file_printf(ms, " ");
2056fca56fbSSascha Wildner 	(void)file_vprintf(ms, f, va);
20679343712SPeter Avalos 	if (error > 0)
2076fca56fbSSascha Wildner 		(void)file_printf(ms, " (%s)", strerror(error));
20879343712SPeter Avalos 	ms->event_flags |= EVENT_HAD_ERR;
209327e51cbSPeter Avalos 	ms->error = error;
210327e51cbSPeter Avalos }
211327e51cbSPeter Avalos 
212327e51cbSPeter Avalos /*VARARGS*/
213327e51cbSPeter Avalos protected void
file_error(struct magic_set * ms,int error,const char * f,...)214327e51cbSPeter Avalos file_error(struct magic_set *ms, int error, const char *f, ...)
215327e51cbSPeter Avalos {
216327e51cbSPeter Avalos 	va_list va;
217327e51cbSPeter Avalos 	va_start(va, f);
218327e51cbSPeter Avalos 	file_error_core(ms, error, f, va, 0);
219327e51cbSPeter Avalos 	va_end(va);
220327e51cbSPeter Avalos }
221327e51cbSPeter Avalos 
222327e51cbSPeter Avalos /*
223327e51cbSPeter Avalos  * Print an error with magic line number.
224327e51cbSPeter Avalos  */
225327e51cbSPeter Avalos /*VARARGS*/
226327e51cbSPeter Avalos protected void
file_magerror(struct magic_set * ms,const char * f,...)227327e51cbSPeter Avalos file_magerror(struct magic_set *ms, const char *f, ...)
228327e51cbSPeter Avalos {
229327e51cbSPeter Avalos 	va_list va;
230327e51cbSPeter Avalos 	va_start(va, f);
231327e51cbSPeter Avalos 	file_error_core(ms, 0, f, va, ms->line);
232327e51cbSPeter Avalos 	va_end(va);
233327e51cbSPeter Avalos }
234327e51cbSPeter Avalos 
235327e51cbSPeter Avalos protected void
file_oomem(struct magic_set * ms,size_t len)236327e51cbSPeter Avalos file_oomem(struct magic_set *ms, size_t len)
237327e51cbSPeter Avalos {
238e4d4ce0cSPeter Avalos 	file_error(ms, errno, "cannot allocate %" SIZE_T_FORMAT "u bytes",
239e4d4ce0cSPeter Avalos 	    len);
240327e51cbSPeter Avalos }
241327e51cbSPeter Avalos 
242327e51cbSPeter Avalos protected void
file_badseek(struct magic_set * ms)243327e51cbSPeter Avalos file_badseek(struct magic_set *ms)
244327e51cbSPeter Avalos {
245327e51cbSPeter Avalos 	file_error(ms, errno, "error seeking");
246327e51cbSPeter Avalos }
247327e51cbSPeter Avalos 
248327e51cbSPeter Avalos protected void
file_badread(struct magic_set * ms)249327e51cbSPeter Avalos file_badread(struct magic_set *ms)
250327e51cbSPeter Avalos {
251327e51cbSPeter Avalos 	file_error(ms, errno, "error reading");
252327e51cbSPeter Avalos }
253327e51cbSPeter Avalos 
254327e51cbSPeter Avalos #ifndef COMPILE_ONLY
255970935fdSSascha Wildner #define FILE_SEPARATOR "\n- "
256c30bd091SSascha Wildner 
2576fca56fbSSascha Wildner protected int
file_separator(struct magic_set * ms)2586fca56fbSSascha Wildner file_separator(struct magic_set *ms)
2596fca56fbSSascha Wildner {
260970935fdSSascha Wildner 	return file_printf(ms, FILE_SEPARATOR);
261970935fdSSascha Wildner }
262970935fdSSascha Wildner 
263970935fdSSascha Wildner static void
trim_separator(struct magic_set * ms)264970935fdSSascha Wildner trim_separator(struct magic_set *ms)
265970935fdSSascha Wildner {
266970935fdSSascha Wildner 	size_t l;
267970935fdSSascha Wildner 
268970935fdSSascha Wildner 	if (ms->o.buf == NULL)
269970935fdSSascha Wildner 		return;
270970935fdSSascha Wildner 
271970935fdSSascha Wildner 	l = strlen(ms->o.buf);
272970935fdSSascha Wildner 	if (l < sizeof(FILE_SEPARATOR))
273970935fdSSascha Wildner 		return;
274970935fdSSascha Wildner 
275970935fdSSascha Wildner 	l -= sizeof(FILE_SEPARATOR) - 1;
276970935fdSSascha Wildner 	if (strcmp(ms->o.buf + l, FILE_SEPARATOR) != 0)
277970935fdSSascha Wildner 		return;
278970935fdSSascha Wildner 
279970935fdSSascha Wildner 	ms->o.buf[l] = '\0';
2806fca56fbSSascha Wildner }
2816fca56fbSSascha Wildner 
282c30bd091SSascha Wildner static int
checkdone(struct magic_set * ms,int * rv)283c30bd091SSascha Wildner checkdone(struct magic_set *ms, int *rv)
284c30bd091SSascha Wildner {
285c30bd091SSascha Wildner 	if ((ms->flags & MAGIC_CONTINUE) == 0)
286c30bd091SSascha Wildner 		return 1;
2876fca56fbSSascha Wildner 	if (file_separator(ms) == -1)
288c30bd091SSascha Wildner 		*rv = -1;
289c30bd091SSascha Wildner 	return 0;
290c30bd091SSascha Wildner }
291c30bd091SSascha Wildner 
2926fca56fbSSascha Wildner protected int
file_default(struct magic_set * ms,size_t nb)2936fca56fbSSascha Wildner file_default(struct magic_set *ms, size_t nb)
2946fca56fbSSascha Wildner {
2956fca56fbSSascha Wildner 	if (ms->flags & MAGIC_MIME) {
2966fca56fbSSascha Wildner 		if ((ms->flags & MAGIC_MIME_TYPE) &&
2976fca56fbSSascha Wildner 		    file_printf(ms, "application/%s",
2986fca56fbSSascha Wildner 			nb ? "octet-stream" : "x-empty") == -1)
2996fca56fbSSascha Wildner 			return -1;
3006fca56fbSSascha Wildner 		return 1;
3016fca56fbSSascha Wildner 	}
3026fca56fbSSascha Wildner 	if (ms->flags & MAGIC_APPLE) {
3036fca56fbSSascha Wildner 		if (file_printf(ms, "UNKNUNKN") == -1)
3046fca56fbSSascha Wildner 			return -1;
3056fca56fbSSascha Wildner 		return 1;
3066fca56fbSSascha Wildner 	}
3076fca56fbSSascha Wildner 	if (ms->flags & MAGIC_EXTENSION) {
3086fca56fbSSascha Wildner 		if (file_printf(ms, "???") == -1)
3096fca56fbSSascha Wildner 			return -1;
3106fca56fbSSascha Wildner 		return 1;
3116fca56fbSSascha Wildner 	}
3126fca56fbSSascha Wildner 	return 0;
3136fca56fbSSascha Wildner }
3146fca56fbSSascha Wildner 
3156fca56fbSSascha Wildner /*
3166fca56fbSSascha Wildner  * The magic detection functions return:
3176fca56fbSSascha Wildner  *	 1: found
3186fca56fbSSascha Wildner  *	 0: not found
3196fca56fbSSascha Wildner  *	-1: error
3206fca56fbSSascha Wildner  */
321c30bd091SSascha Wildner /*ARGSUSED*/
322327e51cbSPeter Avalos protected int
file_buffer(struct magic_set * ms,int fd,struct stat * st,const char * inname,const void * buf,size_t nb)3236fca56fbSSascha Wildner file_buffer(struct magic_set *ms, int fd, struct stat *st,
3246fca56fbSSascha Wildner     const char *inname __attribute__ ((__unused__)),
325e4d4ce0cSPeter Avalos     const void *buf, size_t nb)
326327e51cbSPeter Avalos {
32779343712SPeter Avalos 	int m = 0, rv = 0, looks_text = 0;
32879343712SPeter Avalos 	const char *code = NULL;
32979343712SPeter Avalos 	const char *code_mime = "binary";
330e8af9738SPeter Avalos 	const char *def = "data";
331e8af9738SPeter Avalos 	const char *ftype = NULL;
3326fca56fbSSascha Wildner 	char *rbuf = NULL;
3336fca56fbSSascha Wildner 	struct buffer b;
3346fca56fbSSascha Wildner 
3356fca56fbSSascha Wildner 	buffer_init(&b, fd, st, buf, nb);
3366fca56fbSSascha Wildner 	ms->mode = b.st.st_mode;
337327e51cbSPeter Avalos 
338327e51cbSPeter Avalos 	if (nb == 0) {
339e8af9738SPeter Avalos 		def = "empty";
340e8af9738SPeter Avalos 		goto simple;
341327e51cbSPeter Avalos 	} else if (nb == 1) {
342e8af9738SPeter Avalos 		def = "very short file (no magic)";
343e8af9738SPeter Avalos 		goto simple;
344327e51cbSPeter Avalos 	}
345327e51cbSPeter Avalos 
34679343712SPeter Avalos 	if ((ms->flags & MAGIC_NO_CHECK_ENCODING) == 0) {
3476fca56fbSSascha Wildner 		looks_text = file_encoding(ms, &b, NULL, 0,
348e8af9738SPeter Avalos 		    &code, &code_mime, &ftype);
34979343712SPeter Avalos 	}
35079343712SPeter Avalos 
351327e51cbSPeter Avalos #ifdef __EMX__
352327e51cbSPeter Avalos 	if ((ms->flags & MAGIC_NO_CHECK_APPTYPE) == 0 && inname) {
3536fca56fbSSascha Wildner 		m = file_os2_apptype(ms, inname, &b);
354c30bd091SSascha Wildner 		if ((ms->flags & MAGIC_DEBUG) != 0)
355c30bd091SSascha Wildner 			(void)fprintf(stderr, "[try os2_apptype %d]\n", m);
356c30bd091SSascha Wildner 		switch (m) {
357327e51cbSPeter Avalos 		case -1:
358327e51cbSPeter Avalos 			return -1;
359327e51cbSPeter Avalos 		case 0:
360327e51cbSPeter Avalos 			break;
361327e51cbSPeter Avalos 		default:
362327e51cbSPeter Avalos 			return 1;
363327e51cbSPeter Avalos 		}
364327e51cbSPeter Avalos 	}
365327e51cbSPeter Avalos #endif
366e4d4ce0cSPeter Avalos #if HAVE_FORK
367327e51cbSPeter Avalos 	/* try compression stuff */
368c30bd091SSascha Wildner 	if ((ms->flags & MAGIC_NO_CHECK_COMPRESS) == 0) {
3696fca56fbSSascha Wildner 		m = file_zmagic(ms, &b, inname);
37079343712SPeter Avalos 		if ((ms->flags & MAGIC_DEBUG) != 0)
371c30bd091SSascha Wildner 			(void)fprintf(stderr, "[try zmagic %d]\n", m);
372c30bd091SSascha Wildner 		if (m) {
373e8af9738SPeter Avalos 			goto done_encoding;
37479343712SPeter Avalos 		}
375c30bd091SSascha Wildner 	}
376e4d4ce0cSPeter Avalos #endif
377327e51cbSPeter Avalos 	/* Check if we have a tar file */
378c30bd091SSascha Wildner 	if ((ms->flags & MAGIC_NO_CHECK_TAR) == 0) {
3796fca56fbSSascha Wildner 		m = file_is_tar(ms, &b);
38079343712SPeter Avalos 		if ((ms->flags & MAGIC_DEBUG) != 0)
381c30bd091SSascha Wildner 			(void)fprintf(stderr, "[try tar %d]\n", m);
382c30bd091SSascha Wildner 		if (m) {
383c30bd091SSascha Wildner 			if (checkdone(ms, &rv))
38479343712SPeter Avalos 				goto done;
385327e51cbSPeter Avalos 		}
386c30bd091SSascha Wildner 	}
38779343712SPeter Avalos 
3886fca56fbSSascha Wildner 	/* Check if we have a JSON file */
3896fca56fbSSascha Wildner 	if ((ms->flags & MAGIC_NO_CHECK_JSON) == 0) {
3906fca56fbSSascha Wildner 		m = file_is_json(ms, &b);
3916fca56fbSSascha Wildner 		if ((ms->flags & MAGIC_DEBUG) != 0)
3926fca56fbSSascha Wildner 			(void)fprintf(stderr, "[try json %d]\n", m);
3936fca56fbSSascha Wildner 		if (m) {
3946fca56fbSSascha Wildner 			if (checkdone(ms, &rv))
3956fca56fbSSascha Wildner 				goto done;
3966fca56fbSSascha Wildner 		}
3976fca56fbSSascha Wildner 	}
3986fca56fbSSascha Wildner 
3996fca56fbSSascha Wildner 	/* Check if we have a CSV file */
4006fca56fbSSascha Wildner 	if ((ms->flags & MAGIC_NO_CHECK_CSV) == 0) {
4016fca56fbSSascha Wildner 		m = file_is_csv(ms, &b, looks_text);
4026fca56fbSSascha Wildner 		if ((ms->flags & MAGIC_DEBUG) != 0)
4036fca56fbSSascha Wildner 			(void)fprintf(stderr, "[try csv %d]\n", m);
4046fca56fbSSascha Wildner 		if (m) {
4056fca56fbSSascha Wildner 			if (checkdone(ms, &rv))
4066fca56fbSSascha Wildner 				goto done;
4076fca56fbSSascha Wildner 		}
4086fca56fbSSascha Wildner 	}
4096fca56fbSSascha Wildner 
41079343712SPeter Avalos 	/* Check if we have a CDF file */
411c30bd091SSascha Wildner 	if ((ms->flags & MAGIC_NO_CHECK_CDF) == 0) {
4126fca56fbSSascha Wildner 		m = file_trycdf(ms, &b);
41379343712SPeter Avalos 		if ((ms->flags & MAGIC_DEBUG) != 0)
414c30bd091SSascha Wildner 			(void)fprintf(stderr, "[try cdf %d]\n", m);
415c30bd091SSascha Wildner 		if (m) {
416c30bd091SSascha Wildner 			if (checkdone(ms, &rv))
41779343712SPeter Avalos 				goto done;
418327e51cbSPeter Avalos 		}
419c30bd091SSascha Wildner 	}
420327e51cbSPeter Avalos #ifdef BUILTIN_ELF
4216fca56fbSSascha Wildner 	if ((ms->flags & MAGIC_NO_CHECK_ELF) == 0 && nb > 5 && fd != -1) {
4226fca56fbSSascha Wildner 		file_pushbuf_t *pb;
423327e51cbSPeter Avalos 		/*
42479343712SPeter Avalos 		 * We matched something in the file, so this
42579343712SPeter Avalos 		 * *might* be an ELF file, and the file is at
42679343712SPeter Avalos 		 * least 5 bytes long, so if it's an ELF file
42779343712SPeter Avalos 		 * it has at least one byte past the ELF magic
42879343712SPeter Avalos 		 * number - try extracting information from the
4296fca56fbSSascha Wildner 		 * ELF headers that cannot easily be  extracted
4306fca56fbSSascha Wildner 		 * with rules in the magic file. We we don't
4316fca56fbSSascha Wildner 		 * print the information yet.
432327e51cbSPeter Avalos 		 */
4336fca56fbSSascha Wildner 		if ((pb = file_push_buffer(ms)) == NULL)
4346fca56fbSSascha Wildner 			return -1;
4356fca56fbSSascha Wildner 
4366fca56fbSSascha Wildner 		rv = file_tryelf(ms, &b);
4376fca56fbSSascha Wildner 		rbuf = file_pop_buffer(ms, pb);
4386fca56fbSSascha Wildner 		if (rv == -1) {
4396fca56fbSSascha Wildner 			free(rbuf);
4406fca56fbSSascha Wildner 			rbuf = NULL;
4416fca56fbSSascha Wildner 		}
44279343712SPeter Avalos 		if ((ms->flags & MAGIC_DEBUG) != 0)
4436fca56fbSSascha Wildner 			(void)fprintf(stderr, "[try elf %d]\n", m);
444327e51cbSPeter Avalos 	}
445327e51cbSPeter Avalos #endif
4466fca56fbSSascha Wildner 
4476fca56fbSSascha Wildner 	/* try soft magic tests */
4486fca56fbSSascha Wildner 	if ((ms->flags & MAGIC_NO_CHECK_SOFT) == 0) {
4496fca56fbSSascha Wildner 		m = file_softmagic(ms, &b, NULL, NULL, BINTEST, looks_text);
4506fca56fbSSascha Wildner 		if ((ms->flags & MAGIC_DEBUG) != 0)
4516fca56fbSSascha Wildner 			(void)fprintf(stderr, "[try softmagic %d]\n", m);
4526fca56fbSSascha Wildner 		if (m == 1 && rbuf) {
4536fca56fbSSascha Wildner 			if (file_printf(ms, "%s", rbuf) == -1)
4546fca56fbSSascha Wildner 				goto done;
4556fca56fbSSascha Wildner 		}
4566fca56fbSSascha Wildner 		if (m) {
457c30bd091SSascha Wildner 			if (checkdone(ms, &rv))
45879343712SPeter Avalos 				goto done;
45979343712SPeter Avalos 		}
460c30bd091SSascha Wildner 	}
46179343712SPeter Avalos 
4629f86ab30SPeter Avalos 	/* try text properties */
46379343712SPeter Avalos 	if ((ms->flags & MAGIC_NO_CHECK_TEXT) == 0) {
46479343712SPeter Avalos 
4656fca56fbSSascha Wildner 		m = file_ascmagic(ms, &b, looks_text);
46679343712SPeter Avalos 		if ((ms->flags & MAGIC_DEBUG) != 0)
467c30bd091SSascha Wildner 			(void)fprintf(stderr, "[try ascmagic %d]\n", m);
468c30bd091SSascha Wildner 		if (m) {
46979343712SPeter Avalos 			goto done;
47079343712SPeter Avalos 		}
47179343712SPeter Avalos 	}
47279343712SPeter Avalos 
473e8af9738SPeter Avalos simple:
47479343712SPeter Avalos 	/* give up */
4756fca56fbSSascha Wildner 	if (m == 0) {
47679343712SPeter Avalos 		m = 1;
4776fca56fbSSascha Wildner 		rv = file_default(ms, nb);
4786fca56fbSSascha Wildner 		if (rv == 0)
479c30bd091SSascha Wildner 			if (file_printf(ms, "%s", def) == -1)
48079343712SPeter Avalos 				rv = -1;
48179343712SPeter Avalos 	}
48279343712SPeter Avalos  done:
483970935fdSSascha Wildner 	trim_separator(ms);
48479343712SPeter Avalos 	if ((ms->flags & MAGIC_MIME_ENCODING) != 0) {
48579343712SPeter Avalos 		if (ms->flags & MAGIC_MIME_TYPE)
48679343712SPeter Avalos 			if (file_printf(ms, "; charset=") == -1)
48779343712SPeter Avalos 				rv = -1;
48879343712SPeter Avalos 		if (file_printf(ms, "%s", code_mime) == -1)
48979343712SPeter Avalos 			rv = -1;
49079343712SPeter Avalos 	}
49182c5fa3eSPeter Avalos #if HAVE_FORK
492e8af9738SPeter Avalos  done_encoding:
49382c5fa3eSPeter Avalos #endif
4946fca56fbSSascha Wildner 	free(rbuf);
4956fca56fbSSascha Wildner 	buffer_fini(&b);
49679343712SPeter Avalos 	if (rv)
49779343712SPeter Avalos 		return rv;
49879343712SPeter Avalos 
499327e51cbSPeter Avalos 	return m;
500327e51cbSPeter Avalos }
501327e51cbSPeter Avalos #endif
502327e51cbSPeter Avalos 
503327e51cbSPeter Avalos protected int
file_reset(struct magic_set * ms,int checkloaded)504c30bd091SSascha Wildner file_reset(struct magic_set *ms, int checkloaded)
505327e51cbSPeter Avalos {
506c30bd091SSascha Wildner 	if (checkloaded && ms->mlist[0] == NULL) {
507327e51cbSPeter Avalos 		file_error(ms, 0, "no magic files loaded");
508327e51cbSPeter Avalos 		return -1;
509327e51cbSPeter Avalos 	}
510c990e5baSDaniel Fojt 	file_clearbuf(ms);
51179343712SPeter Avalos 	if (ms->o.pbuf) {
51279343712SPeter Avalos 		free(ms->o.pbuf);
51379343712SPeter Avalos 		ms->o.pbuf = NULL;
51479343712SPeter Avalos 	}
51579343712SPeter Avalos 	ms->event_flags &= ~EVENT_HAD_ERR;
516327e51cbSPeter Avalos 	ms->error = -1;
517327e51cbSPeter Avalos 	return 0;
518327e51cbSPeter Avalos }
519327e51cbSPeter Avalos 
520327e51cbSPeter Avalos #define OCTALIFY(n, o)	\
521327e51cbSPeter Avalos 	/*LINTED*/ \
522327e51cbSPeter Avalos 	(void)(*(n)++ = '\\', \
5236fca56fbSSascha Wildner 	*(n)++ = ((CAST(uint32_t, *(o)) >> 6) & 3) + '0', \
5246fca56fbSSascha Wildner 	*(n)++ = ((CAST(uint32_t, *(o)) >> 3) & 7) + '0', \
5256fca56fbSSascha Wildner 	*(n)++ = ((CAST(uint32_t, *(o)) >> 0) & 7) + '0', \
526327e51cbSPeter Avalos 	(o)++)
527327e51cbSPeter Avalos 
528327e51cbSPeter Avalos protected const char *
file_getbuffer(struct magic_set * ms)529327e51cbSPeter Avalos file_getbuffer(struct magic_set *ms)
530327e51cbSPeter Avalos {
531327e51cbSPeter Avalos 	char *pbuf, *op, *np;
532327e51cbSPeter Avalos 	size_t psize, len;
533327e51cbSPeter Avalos 
53479343712SPeter Avalos 	if (ms->event_flags & EVENT_HAD_ERR)
535327e51cbSPeter Avalos 		return NULL;
536327e51cbSPeter Avalos 
537327e51cbSPeter Avalos 	if (ms->flags & MAGIC_RAW)
538327e51cbSPeter Avalos 		return ms->o.buf;
539327e51cbSPeter Avalos 
54079343712SPeter Avalos 	if (ms->o.buf == NULL)
54179343712SPeter Avalos 		return NULL;
54279343712SPeter Avalos 
543327e51cbSPeter Avalos 	/* * 4 is for octal representation, + 1 is for NUL */
54479343712SPeter Avalos 	len = strlen(ms->o.buf);
54579343712SPeter Avalos 	if (len > (SIZE_MAX - 1) / 4) {
546327e51cbSPeter Avalos 		file_oomem(ms, len);
547327e51cbSPeter Avalos 		return NULL;
548327e51cbSPeter Avalos 	}
549327e51cbSPeter Avalos 	psize = len * 4 + 1;
55079343712SPeter Avalos 	if ((pbuf = CAST(char *, realloc(ms->o.pbuf, psize))) == NULL) {
551327e51cbSPeter Avalos 		file_oomem(ms, psize);
552327e51cbSPeter Avalos 		return NULL;
553327e51cbSPeter Avalos 	}
554327e51cbSPeter Avalos 	ms->o.pbuf = pbuf;
555327e51cbSPeter Avalos 
556327e51cbSPeter Avalos #if defined(HAVE_WCHAR_H) && defined(HAVE_MBRTOWC) && defined(HAVE_WCWIDTH)
557327e51cbSPeter Avalos 	{
558327e51cbSPeter Avalos 		mbstate_t state;
559327e51cbSPeter Avalos 		wchar_t nextchar;
560327e51cbSPeter Avalos 		int mb_conv = 1;
561327e51cbSPeter Avalos 		size_t bytesconsumed;
562327e51cbSPeter Avalos 		char *eop;
563327e51cbSPeter Avalos 		(void)memset(&state, 0, sizeof(mbstate_t));
564327e51cbSPeter Avalos 
565327e51cbSPeter Avalos 		np = ms->o.pbuf;
566327e51cbSPeter Avalos 		op = ms->o.buf;
56779343712SPeter Avalos 		eop = op + len;
568327e51cbSPeter Avalos 
569327e51cbSPeter Avalos 		while (op < eop) {
570327e51cbSPeter Avalos 			bytesconsumed = mbrtowc(&nextchar, op,
5716fca56fbSSascha Wildner 			    CAST(size_t, eop - op), &state);
5726fca56fbSSascha Wildner 			if (bytesconsumed == CAST(size_t, -1) ||
5736fca56fbSSascha Wildner 			    bytesconsumed == CAST(size_t, -2)) {
574327e51cbSPeter Avalos 				mb_conv = 0;
575327e51cbSPeter Avalos 				break;
576327e51cbSPeter Avalos 			}
577327e51cbSPeter Avalos 
578327e51cbSPeter Avalos 			if (iswprint(nextchar)) {
579327e51cbSPeter Avalos 				(void)memcpy(np, op, bytesconsumed);
580327e51cbSPeter Avalos 				op += bytesconsumed;
581327e51cbSPeter Avalos 				np += bytesconsumed;
582327e51cbSPeter Avalos 			} else {
583327e51cbSPeter Avalos 				while (bytesconsumed-- > 0)
584327e51cbSPeter Avalos 					OCTALIFY(np, op);
585327e51cbSPeter Avalos 			}
586327e51cbSPeter Avalos 		}
587327e51cbSPeter Avalos 		*np = '\0';
588327e51cbSPeter Avalos 
589327e51cbSPeter Avalos 		/* Parsing succeeded as a multi-byte sequence */
590327e51cbSPeter Avalos 		if (mb_conv != 0)
591327e51cbSPeter Avalos 			return ms->o.pbuf;
592327e51cbSPeter Avalos 	}
593327e51cbSPeter Avalos #endif
594327e51cbSPeter Avalos 
595884044a5SPeter Avalos 	for (np = ms->o.pbuf, op = ms->o.buf; *op;) {
5966fca56fbSSascha Wildner 		if (isprint(CAST(unsigned char, *op))) {
597884044a5SPeter Avalos 			*np++ = *op++;
598327e51cbSPeter Avalos 		} else {
599327e51cbSPeter Avalos 			OCTALIFY(np, op);
600327e51cbSPeter Avalos 		}
601327e51cbSPeter Avalos 	}
602327e51cbSPeter Avalos 	*np = '\0';
603327e51cbSPeter Avalos 	return ms->o.pbuf;
604327e51cbSPeter Avalos }
605327e51cbSPeter Avalos 
606327e51cbSPeter Avalos protected int
file_check_mem(struct magic_set * ms,unsigned int level)607327e51cbSPeter Avalos file_check_mem(struct magic_set *ms, unsigned int level)
608327e51cbSPeter Avalos {
609327e51cbSPeter Avalos 	size_t len;
610327e51cbSPeter Avalos 
611327e51cbSPeter Avalos 	if (level >= ms->c.len) {
612c30bd091SSascha Wildner 		len = (ms->c.len = 20 + level) * sizeof(*ms->c.li);
61379343712SPeter Avalos 		ms->c.li = CAST(struct level_info *, (ms->c.li == NULL) ?
61479343712SPeter Avalos 		    malloc(len) :
61579343712SPeter Avalos 		    realloc(ms->c.li, len));
616327e51cbSPeter Avalos 		if (ms->c.li == NULL) {
617327e51cbSPeter Avalos 			file_oomem(ms, len);
618327e51cbSPeter Avalos 			return -1;
619327e51cbSPeter Avalos 		}
620327e51cbSPeter Avalos 	}
621327e51cbSPeter Avalos 	ms->c.li[level].got_match = 0;
622327e51cbSPeter Avalos #ifdef ENABLE_CONDITIONALS
623327e51cbSPeter Avalos 	ms->c.li[level].last_match = 0;
624327e51cbSPeter Avalos 	ms->c.li[level].last_cond = COND_NONE;
625327e51cbSPeter Avalos #endif /* ENABLE_CONDITIONALS */
626327e51cbSPeter Avalos 	return 0;
627327e51cbSPeter Avalos }
628ff91a668SPeter Avalos 
629ff91a668SPeter Avalos protected size_t
file_printedlen(const struct magic_set * ms)630ff91a668SPeter Avalos file_printedlen(const struct magic_set *ms)
631ff91a668SPeter Avalos {
632c990e5baSDaniel Fojt 	return ms->o.blen;
633ff91a668SPeter Avalos }
634ff91a668SPeter Avalos 
635ff91a668SPeter Avalos protected int
file_replace(struct magic_set * ms,const char * pat,const char * rep)636ff91a668SPeter Avalos file_replace(struct magic_set *ms, const char *pat, const char *rep)
637ff91a668SPeter Avalos {
63882c5fa3eSPeter Avalos 	file_regex_t rx;
639e8af9738SPeter Avalos 	int rc, rv = -1;
640ff91a668SPeter Avalos 
641*3b9cdfa3SAntonio Huete Jimenez 	rc = file_regcomp(ms, &rx, pat, REG_EXTENDED);
642*3b9cdfa3SAntonio Huete Jimenez 	if (rc == 0) {
643ff91a668SPeter Avalos 		regmatch_t rm;
644ff91a668SPeter Avalos 		int nm = 0;
645*3b9cdfa3SAntonio Huete Jimenez 		while (file_regexec(ms, &rx, ms->o.buf, 1, &rm, 0) == 0) {
646ff91a668SPeter Avalos 			ms->o.buf[rm.rm_so] = '\0';
647ff91a668SPeter Avalos 			if (file_printf(ms, "%s%s", rep,
648ff91a668SPeter Avalos 			    rm.rm_eo != 0 ? ms->o.buf + rm.rm_eo : "") == -1)
649e8af9738SPeter Avalos 				goto out;
650ff91a668SPeter Avalos 			nm++;
651ff91a668SPeter Avalos 		}
652e8af9738SPeter Avalos 		rv = nm;
653ff91a668SPeter Avalos 	}
654e8af9738SPeter Avalos out:
65582c5fa3eSPeter Avalos 	file_regfree(&rx);
656e8af9738SPeter Avalos 	return rv;
657ff91a668SPeter Avalos }
65882c5fa3eSPeter Avalos 
65982c5fa3eSPeter Avalos protected int
file_regcomp(struct magic_set * ms file_locale_used,file_regex_t * rx,const char * pat,int flags)660*3b9cdfa3SAntonio Huete Jimenez file_regcomp(struct magic_set *ms file_locale_used, file_regex_t *rx,
661*3b9cdfa3SAntonio Huete Jimenez     const char *pat, int flags)
66282c5fa3eSPeter Avalos {
66382c5fa3eSPeter Avalos #ifdef USE_C_LOCALE
664*3b9cdfa3SAntonio Huete Jimenez 	locale_t old = uselocale(ms->c_lc_ctype);
665*3b9cdfa3SAntonio Huete Jimenez 	assert(old != NULL);
666c30bd091SSascha Wildner #else
667*3b9cdfa3SAntonio Huete Jimenez 	char old[1024];
668*3b9cdfa3SAntonio Huete Jimenez 	strlcpy(old, setlocale(LC_CTYPE, NULL), sizeof(old));
6696fca56fbSSascha Wildner 	(void)setlocale(LC_CTYPE, "C");
67082c5fa3eSPeter Avalos #endif
671*3b9cdfa3SAntonio Huete Jimenez 	int rc;
672*3b9cdfa3SAntonio Huete Jimenez 	rc = regcomp(rx, pat, flags);
67382c5fa3eSPeter Avalos 
674*3b9cdfa3SAntonio Huete Jimenez #ifdef USE_C_LOCALE
675*3b9cdfa3SAntonio Huete Jimenez 	uselocale(old);
676*3b9cdfa3SAntonio Huete Jimenez #else
677*3b9cdfa3SAntonio Huete Jimenez 	(void)setlocale(LC_CTYPE, old);
678*3b9cdfa3SAntonio Huete Jimenez #endif
679*3b9cdfa3SAntonio Huete Jimenez 	if (rc > 0 && (ms->flags & MAGIC_CHECK)) {
680*3b9cdfa3SAntonio Huete Jimenez 		char errmsg[512];
681*3b9cdfa3SAntonio Huete Jimenez 
682*3b9cdfa3SAntonio Huete Jimenez 		(void)regerror(rc, rx, errmsg, sizeof(errmsg));
683*3b9cdfa3SAntonio Huete Jimenez 		file_magerror(ms, "regex error %d for `%s', (%s)", rc, pat,
684*3b9cdfa3SAntonio Huete Jimenez 		    errmsg);
685*3b9cdfa3SAntonio Huete Jimenez 	}
686*3b9cdfa3SAntonio Huete Jimenez 	return rc;
68782c5fa3eSPeter Avalos }
68882c5fa3eSPeter Avalos 
689*3b9cdfa3SAntonio Huete Jimenez /*ARGSUSED*/
69082c5fa3eSPeter Avalos protected int
file_regexec(struct magic_set * ms file_locale_used,file_regex_t * rx,const char * str,size_t nmatch,regmatch_t * pmatch,int eflags)691*3b9cdfa3SAntonio Huete Jimenez file_regexec(struct magic_set *ms file_locale_used, file_regex_t *rx,
692*3b9cdfa3SAntonio Huete Jimenez     const char *str, size_t nmatch, regmatch_t* pmatch, int eflags)
69382c5fa3eSPeter Avalos {
694*3b9cdfa3SAntonio Huete Jimenez #ifdef USE_C_LOCALE
695*3b9cdfa3SAntonio Huete Jimenez 	locale_t old = uselocale(ms->c_lc_ctype);
696*3b9cdfa3SAntonio Huete Jimenez 	assert(old != NULL);
697*3b9cdfa3SAntonio Huete Jimenez #else
698*3b9cdfa3SAntonio Huete Jimenez 	char old[1024];
699*3b9cdfa3SAntonio Huete Jimenez 	strlcpy(old, setlocale(LC_CTYPE, NULL), sizeof(old));
700*3b9cdfa3SAntonio Huete Jimenez 	(void)setlocale(LC_CTYPE, "C");
701*3b9cdfa3SAntonio Huete Jimenez #endif
702*3b9cdfa3SAntonio Huete Jimenez 	int rc;
703c30bd091SSascha Wildner 	/* XXX: force initialization because glibc does not always do this */
7046fca56fbSSascha Wildner 	if (nmatch != 0)
705c30bd091SSascha Wildner 		memset(pmatch, 0, nmatch * sizeof(*pmatch));
706*3b9cdfa3SAntonio Huete Jimenez 	rc = regexec(rx, str, nmatch, pmatch, eflags);
707*3b9cdfa3SAntonio Huete Jimenez #ifdef USE_C_LOCALE
708*3b9cdfa3SAntonio Huete Jimenez 	uselocale(old);
709*3b9cdfa3SAntonio Huete Jimenez #else
710*3b9cdfa3SAntonio Huete Jimenez 	(void)setlocale(LC_CTYPE, old);
711*3b9cdfa3SAntonio Huete Jimenez #endif
712*3b9cdfa3SAntonio Huete Jimenez 	return rc;
71382c5fa3eSPeter Avalos }
71482c5fa3eSPeter Avalos 
71582c5fa3eSPeter Avalos protected void
file_regfree(file_regex_t * rx)71682c5fa3eSPeter Avalos file_regfree(file_regex_t *rx)
71782c5fa3eSPeter Avalos {
718*3b9cdfa3SAntonio Huete Jimenez 	regfree(rx);
71982c5fa3eSPeter Avalos }
72082c5fa3eSPeter Avalos 
72182c5fa3eSPeter Avalos protected file_pushbuf_t *
file_push_buffer(struct magic_set * ms)72282c5fa3eSPeter Avalos file_push_buffer(struct magic_set *ms)
72382c5fa3eSPeter Avalos {
72482c5fa3eSPeter Avalos 	file_pushbuf_t *pb;
72582c5fa3eSPeter Avalos 
72682c5fa3eSPeter Avalos 	if (ms->event_flags & EVENT_HAD_ERR)
72782c5fa3eSPeter Avalos 		return NULL;
72882c5fa3eSPeter Avalos 
72982c5fa3eSPeter Avalos 	if ((pb = (CAST(file_pushbuf_t *, malloc(sizeof(*pb))))) == NULL)
73082c5fa3eSPeter Avalos 		return NULL;
73182c5fa3eSPeter Avalos 
73282c5fa3eSPeter Avalos 	pb->buf = ms->o.buf;
733c990e5baSDaniel Fojt 	pb->blen = ms->o.blen;
73482c5fa3eSPeter Avalos 	pb->offset = ms->offset;
73582c5fa3eSPeter Avalos 
73682c5fa3eSPeter Avalos 	ms->o.buf = NULL;
737c990e5baSDaniel Fojt 	ms->o.blen = 0;
73882c5fa3eSPeter Avalos 	ms->offset = 0;
73982c5fa3eSPeter Avalos 
74082c5fa3eSPeter Avalos 	return pb;
74182c5fa3eSPeter Avalos }
74282c5fa3eSPeter Avalos 
74382c5fa3eSPeter Avalos protected char *
file_pop_buffer(struct magic_set * ms,file_pushbuf_t * pb)74482c5fa3eSPeter Avalos file_pop_buffer(struct magic_set *ms, file_pushbuf_t *pb)
74582c5fa3eSPeter Avalos {
74682c5fa3eSPeter Avalos 	char *rbuf;
74782c5fa3eSPeter Avalos 
74882c5fa3eSPeter Avalos 	if (ms->event_flags & EVENT_HAD_ERR) {
74982c5fa3eSPeter Avalos 		free(pb->buf);
75082c5fa3eSPeter Avalos 		free(pb);
75182c5fa3eSPeter Avalos 		return NULL;
75282c5fa3eSPeter Avalos 	}
75382c5fa3eSPeter Avalos 
75482c5fa3eSPeter Avalos 	rbuf = ms->o.buf;
75582c5fa3eSPeter Avalos 
75682c5fa3eSPeter Avalos 	ms->o.buf = pb->buf;
757c990e5baSDaniel Fojt 	ms->o.blen = pb->blen;
75882c5fa3eSPeter Avalos 	ms->offset = pb->offset;
75982c5fa3eSPeter Avalos 
76082c5fa3eSPeter Avalos 	free(pb);
76182c5fa3eSPeter Avalos 	return rbuf;
76282c5fa3eSPeter Avalos }
76382c5fa3eSPeter Avalos 
76482c5fa3eSPeter Avalos /*
76582c5fa3eSPeter Avalos  * convert string to ascii printable format.
76682c5fa3eSPeter Avalos  */
76782c5fa3eSPeter Avalos protected char *
file_printable(struct magic_set * ms,char * buf,size_t bufsiz,const char * str,size_t slen)768614728caSSascha Wildner file_printable(struct magic_set *ms, char *buf, size_t bufsiz,
769614728caSSascha Wildner     const char *str, size_t slen)
77082c5fa3eSPeter Avalos {
7716fca56fbSSascha Wildner 	char *ptr, *eptr = buf + bufsiz - 1;
7726fca56fbSSascha Wildner 	const unsigned char *s = RCAST(const unsigned char *, str);
7736fca56fbSSascha Wildner 	const unsigned char *es = s + slen;
77482c5fa3eSPeter Avalos 
7756fca56fbSSascha Wildner 	for (ptr = buf;  ptr < eptr && s < es && *s; s++) {
776614728caSSascha Wildner 		if ((ms->flags & MAGIC_RAW) != 0 || isprint(*s)) {
77782c5fa3eSPeter Avalos 			*ptr++ = *s;
77882c5fa3eSPeter Avalos 			continue;
77982c5fa3eSPeter Avalos 		}
78082c5fa3eSPeter Avalos 		if (ptr >= eptr - 3)
78182c5fa3eSPeter Avalos 			break;
78282c5fa3eSPeter Avalos 		*ptr++ = '\\';
783c30bd091SSascha Wildner 		*ptr++ = ((CAST(unsigned int, *s) >> 6) & 7) + '0';
784c30bd091SSascha Wildner 		*ptr++ = ((CAST(unsigned int, *s) >> 3) & 7) + '0';
785c30bd091SSascha Wildner 		*ptr++ = ((CAST(unsigned int, *s) >> 0) & 7) + '0';
78682c5fa3eSPeter Avalos 	}
78782c5fa3eSPeter Avalos 	*ptr = '\0';
78882c5fa3eSPeter Avalos 	return buf;
78982c5fa3eSPeter Avalos }
790c990e5baSDaniel Fojt 
791c990e5baSDaniel Fojt struct guid {
792c990e5baSDaniel Fojt 	uint32_t data1;
793c990e5baSDaniel Fojt 	uint16_t data2;
794c990e5baSDaniel Fojt 	uint16_t data3;
795c990e5baSDaniel Fojt 	uint8_t data4[8];
796c990e5baSDaniel Fojt };
797c990e5baSDaniel Fojt 
798c990e5baSDaniel Fojt protected int
file_parse_guid(const char * s,uint64_t * guid)799c990e5baSDaniel Fojt file_parse_guid(const char *s, uint64_t *guid)
800c990e5baSDaniel Fojt {
801970935fdSSascha Wildner 	struct guid *g = CAST(struct guid *, CAST(void *, guid));
802*3b9cdfa3SAntonio Huete Jimenez #ifndef WIN32
803c990e5baSDaniel Fojt 	return sscanf(s,
804c990e5baSDaniel Fojt 	    "%8x-%4hx-%4hx-%2hhx%2hhx-%2hhx%2hhx%2hhx%2hhx%2hhx%2hhx",
805c990e5baSDaniel Fojt 	    &g->data1, &g->data2, &g->data3, &g->data4[0], &g->data4[1],
806c990e5baSDaniel Fojt 	    &g->data4[2], &g->data4[3], &g->data4[4], &g->data4[5],
807c990e5baSDaniel Fojt 	    &g->data4[6], &g->data4[7]) == 11 ? 0 : -1;
808*3b9cdfa3SAntonio Huete Jimenez #else
809*3b9cdfa3SAntonio Huete Jimenez 	/* MS-Windows runtime doesn't support %hhx, except under
810*3b9cdfa3SAntonio Huete Jimenez 	   non-default __USE_MINGW_ANSI_STDIO.  */
811*3b9cdfa3SAntonio Huete Jimenez 	uint16_t data16[8];
812*3b9cdfa3SAntonio Huete Jimenez 	int rv = sscanf(s, "%8x-%4hx-%4hx-%2hx%2hx-%2hx%2hx%2hx%2hx%2hx%2hx",
813*3b9cdfa3SAntonio Huete Jimenez 	    &g->data1, &g->data2, &g->data3, &data16[0], &data16[1],
814*3b9cdfa3SAntonio Huete Jimenez 	    &data16[2], &data16[3], &data16[4], &data16[5],
815*3b9cdfa3SAntonio Huete Jimenez 	    &data16[6], &data16[7]) == 11 ? 0 : -1;
816*3b9cdfa3SAntonio Huete Jimenez 	int i;
817*3b9cdfa3SAntonio Huete Jimenez 	for (i = 0; i < 8; i++)
818*3b9cdfa3SAntonio Huete Jimenez 	    g->data4[i] = data16[i];
819*3b9cdfa3SAntonio Huete Jimenez 	return rv;
820*3b9cdfa3SAntonio Huete Jimenez #endif
821c990e5baSDaniel Fojt }
822c990e5baSDaniel Fojt 
823c990e5baSDaniel Fojt protected int
file_print_guid(char * str,size_t len,const uint64_t * guid)824c990e5baSDaniel Fojt file_print_guid(char *str, size_t len, const uint64_t *guid)
825c990e5baSDaniel Fojt {
826970935fdSSascha Wildner 	const struct guid *g = CAST(const struct guid *,
827970935fdSSascha Wildner 	    CAST(const void *, guid));
828c990e5baSDaniel Fojt 
829*3b9cdfa3SAntonio Huete Jimenez #ifndef WIN32
830c990e5baSDaniel Fojt 	return snprintf(str, len, "%.8X-%.4hX-%.4hX-%.2hhX%.2hhX-"
831c990e5baSDaniel Fojt 	    "%.2hhX%.2hhX%.2hhX%.2hhX%.2hhX%.2hhX",
832c990e5baSDaniel Fojt 	    g->data1, g->data2, g->data3, g->data4[0], g->data4[1],
833c990e5baSDaniel Fojt 	    g->data4[2], g->data4[3], g->data4[4], g->data4[5],
834c990e5baSDaniel Fojt 	    g->data4[6], g->data4[7]);
835*3b9cdfa3SAntonio Huete Jimenez #else
836*3b9cdfa3SAntonio Huete Jimenez 	return snprintf(str, len, "%.8X-%.4hX-%.4hX-%.2hX%.2hX-"
837*3b9cdfa3SAntonio Huete Jimenez 	    "%.2hX%.2hX%.2hX%.2hX%.2hX%.2hX",
838*3b9cdfa3SAntonio Huete Jimenez 	    g->data1, g->data2, g->data3, g->data4[0], g->data4[1],
839*3b9cdfa3SAntonio Huete Jimenez 	    g->data4[2], g->data4[3], g->data4[4], g->data4[5],
840*3b9cdfa3SAntonio Huete Jimenez 	    g->data4[6], g->data4[7]);
841*3b9cdfa3SAntonio Huete Jimenez #endif
842c990e5baSDaniel Fojt }
843970935fdSSascha Wildner 
844970935fdSSascha Wildner protected int
file_pipe_closexec(int * fds)845970935fdSSascha Wildner file_pipe_closexec(int *fds)
846970935fdSSascha Wildner {
847970935fdSSascha Wildner #ifdef HAVE_PIPE2
848970935fdSSascha Wildner 	return pipe2(fds, O_CLOEXEC);
849970935fdSSascha Wildner #else
850970935fdSSascha Wildner 	if (pipe(fds) == -1)
851970935fdSSascha Wildner 		return -1;
852*3b9cdfa3SAntonio Huete Jimenez # ifdef F_SETFD
853970935fdSSascha Wildner 	(void)fcntl(fds[0], F_SETFD, FD_CLOEXEC);
854970935fdSSascha Wildner 	(void)fcntl(fds[1], F_SETFD, FD_CLOEXEC);
855*3b9cdfa3SAntonio Huete Jimenez # endif
856970935fdSSascha Wildner 	return 0;
857970935fdSSascha Wildner #endif
858970935fdSSascha Wildner }
859970935fdSSascha Wildner 
860970935fdSSascha Wildner protected int
file_clear_closexec(int fd)861970935fdSSascha Wildner file_clear_closexec(int fd) {
862*3b9cdfa3SAntonio Huete Jimenez #ifdef F_SETFD
863970935fdSSascha Wildner 	return fcntl(fd, F_SETFD, 0);
864*3b9cdfa3SAntonio Huete Jimenez #else
865*3b9cdfa3SAntonio Huete Jimenez 	return 0;
866*3b9cdfa3SAntonio Huete Jimenez #endif
867970935fdSSascha Wildner }
868970935fdSSascha Wildner 
869970935fdSSascha Wildner protected char *
file_strtrim(char * str)870970935fdSSascha Wildner file_strtrim(char *str)
871970935fdSSascha Wildner {
872970935fdSSascha Wildner 	char *last;
873970935fdSSascha Wildner 
874970935fdSSascha Wildner 	while (isspace(CAST(unsigned char, *str)))
875970935fdSSascha Wildner 		str++;
876970935fdSSascha Wildner 	last = str;
877970935fdSSascha Wildner 	while (*last)
878970935fdSSascha Wildner 		last++;
879970935fdSSascha Wildner 	--last;
880970935fdSSascha Wildner 	while (isspace(CAST(unsigned char, *last)))
881970935fdSSascha Wildner 		last--;
882970935fdSSascha Wildner 	*++last = '\0';
883970935fdSSascha Wildner 	return str;
884970935fdSSascha Wildner }
885