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Date:: Sat Jun 22 11:56:50 2024 UTC
Message:: mailcap: reset string parser state for cmd handling When interpolating a mailcap command, make sure we reset the state of the string parser each time, otherwise the intended command is never interpolated. This would mean that previous commands would get run with old files, or worse still, segfault.
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  1 8e1fb8d5 2024-06-13 thomas.ad /*
  2 8e1fb8d5 2024-06-13 thomas.ad  * Copyright (c) 2024 Thomas Adam <thomas@xteddy.org>
  3 8e1fb8d5 2024-06-13 thomas.ad  *
  4 8e1fb8d5 2024-06-13 thomas.ad  * Permission to use, copy, modify, and distribute this software for any
  5 8e1fb8d5 2024-06-13 thomas.ad  * purpose with or without fee is hereby granted, provided that the above
  6 8e1fb8d5 2024-06-13 thomas.ad  * copyright notice and this permission notice appear in all copies.
  7 8e1fb8d5 2024-06-13 thomas.ad  *
  8 8e1fb8d5 2024-06-13 thomas.ad  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  9 8e1fb8d5 2024-06-13 thomas.ad  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 10 8e1fb8d5 2024-06-13 thomas.ad  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 11 8e1fb8d5 2024-06-13 thomas.ad  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 12 8e1fb8d5 2024-06-13 thomas.ad  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 13 8e1fb8d5 2024-06-13 thomas.ad  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 14 8e1fb8d5 2024-06-13 thomas.ad  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 15 8e1fb8d5 2024-06-13 thomas.ad  */
 16 8e1fb8d5 2024-06-13 thomas.ad 
 17 8e1fb8d5 2024-06-13 thomas.ad /*
 18 8e1fb8d5 2024-06-13 thomas.ad  * Handles reading mailmap files.
 19 8e1fb8d5 2024-06-13 thomas.ad  */
 20 8e1fb8d5 2024-06-13 thomas.ad 
 21 8e1fb8d5 2024-06-13 thomas.ad #include "config.h"
 22 8e1fb8d5 2024-06-13 thomas.ad 
 23 8e1fb8d5 2024-06-13 thomas.ad #include <ctype.h>
 24 8e1fb8d5 2024-06-13 thomas.ad #include <errno.h>
 25 8e1fb8d5 2024-06-13 thomas.ad #include <fnmatch.h>
 26 8e1fb8d5 2024-06-13 thomas.ad #include <limits.h>
 27 8e1fb8d5 2024-06-13 thomas.ad #include <stdio.h>
 28 8e1fb8d5 2024-06-13 thomas.ad #include <stdlib.h>
 29 8e1fb8d5 2024-06-13 thomas.ad #include <string.h>
 30 8e1fb8d5 2024-06-13 thomas.ad 
 31 8e1fb8d5 2024-06-13 thomas.ad #include "compat.h"
 32 8e1fb8d5 2024-06-13 thomas.ad #include "mailcap.h"
 33 3d89457c 2024-06-18 thomas.ad #include "xwrapper.h"
 34 8e1fb8d5 2024-06-13 thomas.ad 
 35 d37f7580 2024-06-18 op #define DEFAULT_MAILCAP_ENTRY "*/*; "DEFAULT_OPENER" %s"
 36 8e1fb8d5 2024-06-13 thomas.ad 
 37 8e1fb8d5 2024-06-13 thomas.ad #define str_unappend(ch) if (sps.off > 0 && (ch) != EOF) { sps.off--; }
 38 8e1fb8d5 2024-06-13 thomas.ad 
 39 8e1fb8d5 2024-06-13 thomas.ad struct str_parse_state {
 40 8e1fb8d5 2024-06-13 thomas.ad 	char		*buf;
 41 dcdea5d1 2024-06-14 op 	size_t		 len, off;
 42 dcdea5d1 2024-06-14 op 	int		 esc;
 43 8e1fb8d5 2024-06-13 thomas.ad };
 44 8e1fb8d5 2024-06-13 thomas.ad static struct str_parse_state sps;
 45 8e1fb8d5 2024-06-13 thomas.ad 
 46 dcdea5d1 2024-06-14 op static void		 str_append(char **, size_t *, char);
 47 dcdea5d1 2024-06-14 op static int		 str_getc(void);
 48 dcdea5d1 2024-06-14 op static char		*str_tokenise(void);
 49 dcdea5d1 2024-06-14 op static int		 str_to_argv(char *, int *, char ***);
 50 f141d2d1 2024-06-14 op static char		*str_trim_whitespace(char *);
 51 dcdea5d1 2024-06-14 op static void		 argv_free(int, char **);
 52 8e1fb8d5 2024-06-13 thomas.ad 
 53 8e1fb8d5 2024-06-13 thomas.ad struct mailcaplist 	 mailcaps = TAILQ_HEAD_INITIALIZER(mailcaps);
 54 8e1fb8d5 2024-06-13 thomas.ad 
 55 8e1fb8d5 2024-06-13 thomas.ad static FILE		*find_mailcap_file(void);
 56 8e1fb8d5 2024-06-13 thomas.ad static struct mailcap	*mailcap_new(void);
 57 dcdea5d1 2024-06-14 op static void		 mailcap_expand_cmd(struct mailcap *, char *, char *);
 58 dcdea5d1 2024-06-14 op static int		 parse_mailcap_line(char *);
 59 8e1fb8d5 2024-06-13 thomas.ad static struct mailcap 	*mailcap_by_mimetype(const char *);
 60 8e1fb8d5 2024-06-13 thomas.ad 
 61 8e1fb8d5 2024-06-13 thomas.ad /* FIXME: $MAILCAPS can override this, but we don't check for that. */
 62 8e1fb8d5 2024-06-13 thomas.ad static const char *default_mailcaps[] = {
 63 8e1fb8d5 2024-06-13 thomas.ad 	"~/.mailcap",
 64 8e1fb8d5 2024-06-13 thomas.ad 	"/etc/mailcap",
 65 8e1fb8d5 2024-06-13 thomas.ad 	"/usr/etc/mailcap",
 66 8e1fb8d5 2024-06-13 thomas.ad 	"/usr/local/etc/mailcap",
 67 8e1fb8d5 2024-06-13 thomas.ad 	NULL,
 68 8e1fb8d5 2024-06-13 thomas.ad };
 69 8e1fb8d5 2024-06-13 thomas.ad 
 70 8e1fb8d5 2024-06-13 thomas.ad enum mailcap_section {
 71 8e1fb8d5 2024-06-13 thomas.ad 	MAILCAP_MIME = 0,
 72 8e1fb8d5 2024-06-13 thomas.ad 	MAILCAP_CMD,
 73 52ec20ae 2024-06-14 thomas.ad 	MAILCAP_FLAGS,
 74 8e1fb8d5 2024-06-13 thomas.ad };
 75 8e1fb8d5 2024-06-13 thomas.ad 
 76 f141d2d1 2024-06-14 op static char *
 77 8e1fb8d5 2024-06-13 thomas.ad str_trim_whitespace(char *s)
 78 8e1fb8d5 2024-06-13 thomas.ad {
 79 8e1fb8d5 2024-06-13 thomas.ad 	char 	*t;
 80 8e1fb8d5 2024-06-13 thomas.ad 
 81 8e1fb8d5 2024-06-13 thomas.ad 	s += strspn(s, " \t\n");
 82 8e1fb8d5 2024-06-13 thomas.ad 	t = s + strlen(s) - 1;
 83 8e1fb8d5 2024-06-13 thomas.ad 
 84 8e1fb8d5 2024-06-13 thomas.ad 	while (t >= s && isspace((unsigned char)*t))
 85 8e1fb8d5 2024-06-13 thomas.ad 		*t-- = '\0';
 86 f141d2d1 2024-06-14 op 	return s;
 87 8e1fb8d5 2024-06-13 thomas.ad }
 88 8e1fb8d5 2024-06-13 thomas.ad 
 89 8e1fb8d5 2024-06-13 thomas.ad static void
 90 8e1fb8d5 2024-06-13 thomas.ad str_append(char **buf, size_t *len, char add)
 91 8e1fb8d5 2024-06-13 thomas.ad {
 92 8e1fb8d5 2024-06-13 thomas.ad 	size_t 	al = 1;
 93 8e1fb8d5 2024-06-13 thomas.ad 
 94 8e1fb8d5 2024-06-13 thomas.ad 	if (al > SIZE_MAX - 1 || *len > SIZE_MAX - 1 - al)
 95 8e1fb8d5 2024-06-13 thomas.ad 		errx(1, "buffer is too big");
 96 8e1fb8d5 2024-06-13 thomas.ad 
 97 3d89457c 2024-06-18 thomas.ad 	*buf = xrealloc(*buf, (*len) + 1 + al);
 98 8e1fb8d5 2024-06-13 thomas.ad 	memcpy((*buf) + *len, &add, al);
 99 8e1fb8d5 2024-06-13 thomas.ad 	(*len) += al;
100 8e1fb8d5 2024-06-13 thomas.ad }
101 8e1fb8d5 2024-06-13 thomas.ad 
102 8e1fb8d5 2024-06-13 thomas.ad static int
103 8e1fb8d5 2024-06-13 thomas.ad str_getc(void)
104 8e1fb8d5 2024-06-13 thomas.ad {
105 dcdea5d1 2024-06-14 op 	int	ch;
106 8e1fb8d5 2024-06-13 thomas.ad 
107 8e1fb8d5 2024-06-13 thomas.ad 	if (sps.esc != 0) {
108 8e1fb8d5 2024-06-13 thomas.ad 		sps.esc--;
109 8e1fb8d5 2024-06-13 thomas.ad 		return ('\\');
110 8e1fb8d5 2024-06-13 thomas.ad 	}
111 8e1fb8d5 2024-06-13 thomas.ad 	for (;;) {
112 8e1fb8d5 2024-06-13 thomas.ad 		ch = EOF;
113 8e1fb8d5 2024-06-13 thomas.ad 		if (sps.off < sps.len)
114 8e1fb8d5 2024-06-13 thomas.ad 			ch = sps.buf[sps.off++];
115 8e1fb8d5 2024-06-13 thomas.ad 
116 8e1fb8d5 2024-06-13 thomas.ad 		if (ch == '\\') {
117 8e1fb8d5 2024-06-13 thomas.ad 			sps.esc++;
118 8e1fb8d5 2024-06-13 thomas.ad 			continue;
119 8e1fb8d5 2024-06-13 thomas.ad 		}
120 8e1fb8d5 2024-06-13 thomas.ad 		if (ch == '\n' && (sps.esc % 2) == 1) {
121 8e1fb8d5 2024-06-13 thomas.ad 			sps.esc--;
122 8e1fb8d5 2024-06-13 thomas.ad 			continue;
123 8e1fb8d5 2024-06-13 thomas.ad 		}
124 8e1fb8d5 2024-06-13 thomas.ad 
125 8e1fb8d5 2024-06-13 thomas.ad 		if (sps.esc != 0) {
126 8e1fb8d5 2024-06-13 thomas.ad 			str_unappend(ch);
127 8e1fb8d5 2024-06-13 thomas.ad 			sps.esc--;
128 8e1fb8d5 2024-06-13 thomas.ad 			return ('\\');
129 8e1fb8d5 2024-06-13 thomas.ad 		}
130 8e1fb8d5 2024-06-13 thomas.ad 		return (ch);
131 8e1fb8d5 2024-06-13 thomas.ad 	}
132 8e1fb8d5 2024-06-13 thomas.ad }
133 8e1fb8d5 2024-06-13 thomas.ad 
134 8e1fb8d5 2024-06-13 thomas.ad static char *
135 8e1fb8d5 2024-06-13 thomas.ad str_tokenise(void)
136 8e1fb8d5 2024-06-13 thomas.ad {
137 dcdea5d1 2024-06-14 op 	int			 ch;
138 8e1fb8d5 2024-06-13 thomas.ad 	char			*buf;
139 8e1fb8d5 2024-06-13 thomas.ad 	size_t			 len;
140 dcdea5d1 2024-06-14 op 	enum {
141 dcdea5d1 2024-06-14 op 		APPEND,
142 dcdea5d1 2024-06-14 op 		DOUBLE_QUOTES,
143 dcdea5d1 2024-06-14 op 		SINGLE_QUOTES,
144 dcdea5d1 2024-06-14 op 	}			 state = APPEND;
145 8e1fb8d5 2024-06-13 thomas.ad 
146 8e1fb8d5 2024-06-13 thomas.ad 	len = 0;
147 8e1fb8d5 2024-06-13 thomas.ad 	buf = calloc(1, sizeof *buf);
148 8e1fb8d5 2024-06-13 thomas.ad 
149 8e1fb8d5 2024-06-13 thomas.ad 	for (;;) {
150 8e1fb8d5 2024-06-13 thomas.ad 		ch = str_getc();
151 8e1fb8d5 2024-06-13 thomas.ad 		/* EOF or \n are always the end of the token. */
152 8e1fb8d5 2024-06-13 thomas.ad 		if (ch == EOF || (state == APPEND && ch == '\n'))
153 8e1fb8d5 2024-06-13 thomas.ad 			break;
154 8e1fb8d5 2024-06-13 thomas.ad 
155 8e1fb8d5 2024-06-13 thomas.ad 		/* Whitespace ends a token unless inside quotes.  But if we've
156 8e1fb8d5 2024-06-13 thomas.ad 		 * also been given:
157 8e1fb8d5 2024-06-13 thomas.ad 		 *
158 8e1fb8d5 2024-06-13 thomas.ad 		 * foo "" bar
159 8e1fb8d5 2024-06-13 thomas.ad 		 *
160 8e1fb8d5 2024-06-13 thomas.ad 		 * don't lose that.
161 8e1fb8d5 2024-06-13 thomas.ad 		 */
162 8e1fb8d5 2024-06-13 thomas.ad 		if (((ch == ' ' || ch == '\t') && state == APPEND) &&
163 8e1fb8d5 2024-06-13 thomas.ad 		    buf[0] != '\0') {
164 8e1fb8d5 2024-06-13 thomas.ad 			break;
165 8e1fb8d5 2024-06-13 thomas.ad 		}
166 8e1fb8d5 2024-06-13 thomas.ad 
167 8e1fb8d5 2024-06-13 thomas.ad 		if (ch == '\\' && state != SINGLE_QUOTES) {
168 8e1fb8d5 2024-06-13 thomas.ad 			ch = str_getc();
169 8e1fb8d5 2024-06-13 thomas.ad 			str_append(&buf, &len, ch);
170 8e1fb8d5 2024-06-13 thomas.ad 			continue;
171 8e1fb8d5 2024-06-13 thomas.ad 		}
172 8e1fb8d5 2024-06-13 thomas.ad 		switch (ch) {
173 8e1fb8d5 2024-06-13 thomas.ad 		case '\'':
174 8e1fb8d5 2024-06-13 thomas.ad 			if (state == APPEND) {
175 8e1fb8d5 2024-06-13 thomas.ad 				state = SINGLE_QUOTES;
176 8e1fb8d5 2024-06-13 thomas.ad 				continue;
177 8e1fb8d5 2024-06-13 thomas.ad 			}
178 8e1fb8d5 2024-06-13 thomas.ad 			if (state == SINGLE_QUOTES) {
179 8e1fb8d5 2024-06-13 thomas.ad 				state = APPEND;
180 8e1fb8d5 2024-06-13 thomas.ad 				continue;
181 8e1fb8d5 2024-06-13 thomas.ad 			}
182 8e1fb8d5 2024-06-13 thomas.ad 			break;
183 8e1fb8d5 2024-06-13 thomas.ad 		case '"':
184 8e1fb8d5 2024-06-13 thomas.ad 			if (state == APPEND) {
185 8e1fb8d5 2024-06-13 thomas.ad 				state = DOUBLE_QUOTES;
186 8e1fb8d5 2024-06-13 thomas.ad 				continue;
187 8e1fb8d5 2024-06-13 thomas.ad 			}
188 8e1fb8d5 2024-06-13 thomas.ad 			if (state == DOUBLE_QUOTES) {
189 8e1fb8d5 2024-06-13 thomas.ad 				state = APPEND;
190 8e1fb8d5 2024-06-13 thomas.ad 				continue;
191 8e1fb8d5 2024-06-13 thomas.ad 			}
192 8e1fb8d5 2024-06-13 thomas.ad 			break;
193 8e1fb8d5 2024-06-13 thomas.ad 		default:
194 8e1fb8d5 2024-06-13 thomas.ad 			/* Otherwise add the character to the buffer. */
195 8e1fb8d5 2024-06-13 thomas.ad 			str_append(&buf, &len, ch);
196 8e1fb8d5 2024-06-13 thomas.ad 			break;
197 8e1fb8d5 2024-06-13 thomas.ad 
198 8e1fb8d5 2024-06-13 thomas.ad 		}
199 8e1fb8d5 2024-06-13 thomas.ad 	}
200 8e1fb8d5 2024-06-13 thomas.ad 	str_unappend(ch);
201 8e1fb8d5 2024-06-13 thomas.ad 	buf[len] = '\0';
202 8e1fb8d5 2024-06-13 thomas.ad 
203 8e1fb8d5 2024-06-13 thomas.ad 	if (*buf == '\0' || state == SINGLE_QUOTES || state == DOUBLE_QUOTES) {
204 8e1fb8d5 2024-06-13 thomas.ad 		fprintf(stderr, "Unterminated string: <%s>, missing: %c\n",
205 8e1fb8d5 2024-06-13 thomas.ad 			buf, state == SINGLE_QUOTES ? '\'' :
206 8e1fb8d5 2024-06-13 thomas.ad 			state == DOUBLE_QUOTES ? '"' : ' ');
207 8e1fb8d5 2024-06-13 thomas.ad 		free(buf);
208 8e1fb8d5 2024-06-13 thomas.ad 		return (NULL);
209 8e1fb8d5 2024-06-13 thomas.ad 	}
210 8e1fb8d5 2024-06-13 thomas.ad 
211 8e1fb8d5 2024-06-13 thomas.ad 	return (buf);
212 8e1fb8d5 2024-06-13 thomas.ad }
213 8e1fb8d5 2024-06-13 thomas.ad 
214 8e1fb8d5 2024-06-13 thomas.ad static int
215 8e1fb8d5 2024-06-13 thomas.ad str_to_argv(char *str, int *ret_argc, char ***ret_argv)
216 8e1fb8d5 2024-06-13 thomas.ad {
217 8e1fb8d5 2024-06-13 thomas.ad 	char			*token;
218 8e1fb8d5 2024-06-13 thomas.ad 	int			 ch, next;
219 8e1fb8d5 2024-06-13 thomas.ad 	char			**argv = NULL;
220 dcdea5d1 2024-06-14 op 	int			 argc = 0;
221 8e1fb8d5 2024-06-13 thomas.ad 
222 8e1fb8d5 2024-06-13 thomas.ad 	if (str == NULL)
223 8e1fb8d5 2024-06-13 thomas.ad 		return -1;
224 8e1fb8d5 2024-06-13 thomas.ad 
225 8e1fb8d5 2024-06-13 thomas.ad 	free(sps.buf);
226 5acf19ec 2024-06-22 thomas.ad 	memset(&sps, 0, sizeof(sps));
227 3d89457c 2024-06-18 thomas.ad 	sps.buf = xstrdup(str);
228 8e1fb8d5 2024-06-13 thomas.ad 	sps.len = strlen(sps.buf);
229 8e1fb8d5 2024-06-13 thomas.ad 
230 8e1fb8d5 2024-06-13 thomas.ad 	for (;;) {
231 8e1fb8d5 2024-06-13 thomas.ad 		if (str[0] == '#') {
232 8e1fb8d5 2024-06-13 thomas.ad 			/* Skip comment. */
233 8e1fb8d5 2024-06-13 thomas.ad 			next = str_getc();
234 8e1fb8d5 2024-06-13 thomas.ad 			while (((next = str_getc()) != EOF))
235 8e1fb8d5 2024-06-13 thomas.ad 				; /* Nothing. */
236 8e1fb8d5 2024-06-13 thomas.ad 		}
237 8e1fb8d5 2024-06-13 thomas.ad 
238 8e1fb8d5 2024-06-13 thomas.ad 		ch = str_getc();
239 8e1fb8d5 2024-06-13 thomas.ad 
240 8e1fb8d5 2024-06-13 thomas.ad 		if (ch == '\n' || ch == EOF)
241 8e1fb8d5 2024-06-13 thomas.ad 			goto out;
242 8e1fb8d5 2024-06-13 thomas.ad 		if (ch == ' ' || ch == '\t')
243 8e1fb8d5 2024-06-13 thomas.ad 			continue;
244 8e1fb8d5 2024-06-13 thomas.ad 
245 8e1fb8d5 2024-06-13 thomas.ad 		/* Tokenise the string according to quoting rules.  Note that
246 8e1fb8d5 2024-06-13 thomas.ad 		 * the string is stepped-back by one character to make the
247 8e1fb8d5 2024-06-13 thomas.ad 		 * tokenisation easier, and not to kick-off the state of the
248 8e1fb8d5 2024-06-13 thomas.ad 		 * parsing from this point.
249 8e1fb8d5 2024-06-13 thomas.ad 		 */
250 8e1fb8d5 2024-06-13 thomas.ad 		str_unappend(ch);
251 8e1fb8d5 2024-06-13 thomas.ad 		if ((token = str_tokenise()) == NULL) {
252 8e1fb8d5 2024-06-13 thomas.ad 			argv_free(argc, argv);
253 8e1fb8d5 2024-06-13 thomas.ad 			return -1;
254 8e1fb8d5 2024-06-13 thomas.ad 		}
255 8e1fb8d5 2024-06-13 thomas.ad 
256 8e1fb8d5 2024-06-13 thomas.ad 		/* Add to argv. */
257 3d89457c 2024-06-18 thomas.ad 		argv = xreallocarray(argv, argc + 1, sizeof *argv);
258 3d89457c 2024-06-18 thomas.ad 		argv[argc++] = xstrdup(token);
259 8e1fb8d5 2024-06-13 thomas.ad 	}
260 8e1fb8d5 2024-06-13 thomas.ad out:
261 8e1fb8d5 2024-06-13 thomas.ad 	*ret_argv = argv;
262 8e1fb8d5 2024-06-13 thomas.ad 	*ret_argc = argc;
263 8e1fb8d5 2024-06-13 thomas.ad 
264 8e1fb8d5 2024-06-13 thomas.ad 	return 0;
265 8e1fb8d5 2024-06-13 thomas.ad }
266 8e1fb8d5 2024-06-13 thomas.ad 
267 8e1fb8d5 2024-06-13 thomas.ad void
268 8e1fb8d5 2024-06-13 thomas.ad argv_free(int argc, char **argv)
269 8e1fb8d5 2024-06-13 thomas.ad {
270 dcdea5d1 2024-06-14 op 	int	i;
271 8e1fb8d5 2024-06-13 thomas.ad 
272 8e1fb8d5 2024-06-13 thomas.ad 	if (argc == 0)
273 8e1fb8d5 2024-06-13 thomas.ad 		return;
274 8e1fb8d5 2024-06-13 thomas.ad 
275 8e1fb8d5 2024-06-13 thomas.ad 	for (i = 0; i < argc; i++)
276 8e1fb8d5 2024-06-13 thomas.ad 		free(argv[i]);
277 8e1fb8d5 2024-06-13 thomas.ad 	free(argv);
278 8e1fb8d5 2024-06-13 thomas.ad }
279 8e1fb8d5 2024-06-13 thomas.ad 
280 8e1fb8d5 2024-06-13 thomas.ad static FILE *
281 8e1fb8d5 2024-06-13 thomas.ad find_mailcap_file(void)
282 8e1fb8d5 2024-06-13 thomas.ad {
283 8e1fb8d5 2024-06-13 thomas.ad 	FILE	 *fp;
284 dcdea5d1 2024-06-14 op 	char	**entry = (char **)default_mailcaps;
285 dcdea5d1 2024-06-14 op 	char	 *home = NULL;
286 dcdea5d1 2024-06-14 op 	char	 *expanded = NULL;
287 8e1fb8d5 2024-06-13 thomas.ad 
288 8e1fb8d5 2024-06-13 thomas.ad 	for (; *entry != NULL; entry++) {
289 8e1fb8d5 2024-06-13 thomas.ad 		if (strncmp(*entry, "~/", 2) == 0) {
290 8e1fb8d5 2024-06-13 thomas.ad 			*entry += 2;
291 8e1fb8d5 2024-06-13 thomas.ad 			if ((home = getenv("HOME")) == NULL)
292 8e1fb8d5 2024-06-13 thomas.ad 				errx(1, "HOME not set");
293 8e1fb8d5 2024-06-13 thomas.ad 			asprintf(&expanded, "%s/%s", home, *entry);
294 8e1fb8d5 2024-06-13 thomas.ad 		} else
295 8e1fb8d5 2024-06-13 thomas.ad 			asprintf(&expanded, "%s", *entry);
296 8e1fb8d5 2024-06-13 thomas.ad 
297 8e1fb8d5 2024-06-13 thomas.ad 		fp = fopen(expanded, "r");
298 8e1fb8d5 2024-06-13 thomas.ad 		free(expanded);
299 8e1fb8d5 2024-06-13 thomas.ad 		if (fp != NULL)
300 8e1fb8d5 2024-06-13 thomas.ad 			return (fp);
301 8e1fb8d5 2024-06-13 thomas.ad 	}
302 8e1fb8d5 2024-06-13 thomas.ad 	return (NULL);
303 8e1fb8d5 2024-06-13 thomas.ad }
304 8e1fb8d5 2024-06-13 thomas.ad 
305 8e1fb8d5 2024-06-13 thomas.ad static struct mailcap *
306 8e1fb8d5 2024-06-13 thomas.ad mailcap_new(void)
307 8e1fb8d5 2024-06-13 thomas.ad {
308 8e1fb8d5 2024-06-13 thomas.ad 	struct mailcap	*mc = NULL;
309 8e1fb8d5 2024-06-13 thomas.ad 
310 3d89457c 2024-06-18 thomas.ad 	mc = xcalloc(1, sizeof *mc);
311 8e1fb8d5 2024-06-13 thomas.ad 
312 8e1fb8d5 2024-06-13 thomas.ad 	return (mc);
313 8e1fb8d5 2024-06-13 thomas.ad }
314 8e1fb8d5 2024-06-13 thomas.ad 
315 8e1fb8d5 2024-06-13 thomas.ad static int
316 8e1fb8d5 2024-06-13 thomas.ad parse_mailcap_line(char *input)
317 8e1fb8d5 2024-06-13 thomas.ad {
318 8e1fb8d5 2024-06-13 thomas.ad 	struct mailcap		*mc;
319 52ec20ae 2024-06-14 thomas.ad 	int	 		 ms = 0;
320 dcdea5d1 2024-06-14 op 	char			*line = NULL;
321 8e1fb8d5 2024-06-13 thomas.ad 
322 8e1fb8d5 2024-06-13 thomas.ad 	mc = mailcap_new();
323 8e1fb8d5 2024-06-13 thomas.ad 
324 52ec20ae 2024-06-14 thomas.ad 	while ((line = strsep(&input, ";")) != NULL) {
325 f141d2d1 2024-06-14 op 		line = str_trim_whitespace(line);
326 8e1fb8d5 2024-06-13 thomas.ad 
327 8e1fb8d5 2024-06-13 thomas.ad 		switch (ms) {
328 8e1fb8d5 2024-06-13 thomas.ad 		case MAILCAP_MIME:
329 3d89457c 2024-06-18 thomas.ad 			mc->mime_type = xstrdup(line);
330 52ec20ae 2024-06-14 thomas.ad 			ms++;
331 8e1fb8d5 2024-06-13 thomas.ad 			break;
332 8e1fb8d5 2024-06-13 thomas.ad 		case MAILCAP_CMD:
333 3d89457c 2024-06-18 thomas.ad 			mc->cmd = xstrdup(line);
334 52ec20ae 2024-06-14 thomas.ad 			ms++;
335 8e1fb8d5 2024-06-13 thomas.ad 			break;
336 52ec20ae 2024-06-14 thomas.ad 		case MAILCAP_FLAGS:
337 8e1fb8d5 2024-06-13 thomas.ad 			if (strcmp(line, "needsterminal") == 0)
338 8e1fb8d5 2024-06-13 thomas.ad 				mc->flags |= MAILCAP_NEEDSTERMINAL;
339 8e1fb8d5 2024-06-13 thomas.ad 			if (strcmp(line, "copiousoutput") == 0)
340 8e1fb8d5 2024-06-13 thomas.ad 				mc->flags |= MAILCAP_COPIOUSOUTPUT;
341 8e1fb8d5 2024-06-13 thomas.ad 			break;
342 8e1fb8d5 2024-06-13 thomas.ad 		}
343 8e1fb8d5 2024-06-13 thomas.ad 	}
344 8e1fb8d5 2024-06-13 thomas.ad 
345 8e1fb8d5 2024-06-13 thomas.ad 	if (line != NULL && *line != '\0') {
346 8e1fb8d5 2024-06-13 thomas.ad 		fprintf(stderr, "mailcap: trailing: %s: skipping...\n", line);
347 8e1fb8d5 2024-06-13 thomas.ad 		free(mc);
348 8e1fb8d5 2024-06-13 thomas.ad 		return (-1);
349 8e1fb8d5 2024-06-13 thomas.ad 	}
350 8e1fb8d5 2024-06-13 thomas.ad 	TAILQ_INSERT_TAIL(&mailcaps, mc, mailcaps);
351 8e1fb8d5 2024-06-13 thomas.ad 
352 8e1fb8d5 2024-06-13 thomas.ad 	return (0);
353 8e1fb8d5 2024-06-13 thomas.ad }
354 8e1fb8d5 2024-06-13 thomas.ad 
355 8e1fb8d5 2024-06-13 thomas.ad void
356 8e1fb8d5 2024-06-13 thomas.ad mailcap_expand_cmd(struct mailcap *mc, char *mt, char *file)
357 8e1fb8d5 2024-06-13 thomas.ad {
358 dcdea5d1 2024-06-14 op 	char		**argv;
359 dcdea5d1 2024-06-14 op 	int		 argc = 0, ret;
360 8e1fb8d5 2024-06-13 thomas.ad 
361 8e1fb8d5 2024-06-13 thomas.ad 	if (mc->cmd == NULL)
362 8e1fb8d5 2024-06-13 thomas.ad 		return;
363 8e1fb8d5 2024-06-13 thomas.ad 
364 8e1fb8d5 2024-06-13 thomas.ad 	ret = str_to_argv(mc->cmd, &argc, &argv);
365 8e1fb8d5 2024-06-13 thomas.ad 
366 8e1fb8d5 2024-06-13 thomas.ad 	if (ret != 0 || argv == NULL)
367 8e1fb8d5 2024-06-13 thomas.ad 		return;
368 8e1fb8d5 2024-06-13 thomas.ad 
369 8e1fb8d5 2024-06-13 thomas.ad 	for (int z = 0; z < argc; z++) {
370 8e1fb8d5 2024-06-13 thomas.ad 		if (strcmp(argv[z], "%s") == 0) {
371 8e1fb8d5 2024-06-13 thomas.ad 			free(argv[z]);
372 3d89457c 2024-06-18 thomas.ad 			argv[z] = xstrdup(file);
373 8e1fb8d5 2024-06-13 thomas.ad 		}
374 8e1fb8d5 2024-06-13 thomas.ad 
375 8e1fb8d5 2024-06-13 thomas.ad 		if (strcmp(argv[z], "%t") == 0) {
376 8e1fb8d5 2024-06-13 thomas.ad 			free(argv[z]);
377 3d89457c 2024-06-18 thomas.ad 			argv[z] = xstrdup(mt);
378 8e1fb8d5 2024-06-13 thomas.ad 		}
379 8e1fb8d5 2024-06-13 thomas.ad 	}
380 8e1fb8d5 2024-06-13 thomas.ad 	argv[argc++] = NULL;
381 8e1fb8d5 2024-06-13 thomas.ad 
382 8e1fb8d5 2024-06-13 thomas.ad 	argv_free(mc->cmd_argc, mc->cmd_argv);
383 8e1fb8d5 2024-06-13 thomas.ad 
384 8e1fb8d5 2024-06-13 thomas.ad 	mc->cmd_argv = argv;
385 8e1fb8d5 2024-06-13 thomas.ad 	mc->cmd_argc = argc;
386 8e1fb8d5 2024-06-13 thomas.ad }
387 8e1fb8d5 2024-06-13 thomas.ad 
388 8e1fb8d5 2024-06-13 thomas.ad static struct mailcap *
389 8e1fb8d5 2024-06-13 thomas.ad mailcap_by_mimetype(const char *mt)
390 8e1fb8d5 2024-06-13 thomas.ad {
391 dcdea5d1 2024-06-14 op 	struct mailcap	*mc;
392 8e1fb8d5 2024-06-13 thomas.ad 
393 8e1fb8d5 2024-06-13 thomas.ad 	TAILQ_FOREACH(mc, &mailcaps, mailcaps) {
394 8e1fb8d5 2024-06-13 thomas.ad 		if (fnmatch(mc->mime_type, mt, 0) == 0)
395 8e1fb8d5 2024-06-13 thomas.ad 			return (mc);
396 8e1fb8d5 2024-06-13 thomas.ad 	}
397 8e1fb8d5 2024-06-13 thomas.ad 	return (NULL);
398 8e1fb8d5 2024-06-13 thomas.ad }
399 8e1fb8d5 2024-06-13 thomas.ad 
400 8e1fb8d5 2024-06-13 thomas.ad void
401 8e1fb8d5 2024-06-13 thomas.ad init_mailcap(void)
402 8e1fb8d5 2024-06-13 thomas.ad {
403 836a2edc 2024-06-14 op 	FILE		*f;
404 836a2edc 2024-06-14 op 	char		*copy;
405 836a2edc 2024-06-14 op 
406 836a2edc 2024-06-14 op 	if ((f = find_mailcap_file()) != NULL) {
407 836a2edc 2024-06-14 op 		mailcap_parse(f);
408 836a2edc 2024-06-14 op 		fclose(f);
409 836a2edc 2024-06-14 op 	}
410 836a2edc 2024-06-14 op 
411 3d89457c 2024-06-18 thomas.ad 	copy = xstrdup(DEFAULT_MAILCAP_ENTRY);
412 836a2edc 2024-06-14 op 
413 836a2edc 2024-06-14 op 	/* Our own entry won't error. */
414 836a2edc 2024-06-14 op 	(void)parse_mailcap_line(copy);
415 836a2edc 2024-06-14 op 	free(copy);
416 836a2edc 2024-06-14 op }
417 836a2edc 2024-06-14 op 
418 836a2edc 2024-06-14 op void
419 836a2edc 2024-06-14 op mailcap_parse(FILE *f)
420 836a2edc 2024-06-14 op {
421 8e1fb8d5 2024-06-13 thomas.ad 	const char	 delims[3] = {'\\', '\\', '\0'};
422 dcdea5d1 2024-06-14 op 	char		*buf, *copy;
423 8e1fb8d5 2024-06-13 thomas.ad 	size_t		 line = 0;
424 8e1fb8d5 2024-06-13 thomas.ad 
425 8e1fb8d5 2024-06-13 thomas.ad 	while ((buf = fparseln(f, NULL, &line, delims, 0)) != NULL) {
426 8e1fb8d5 2024-06-13 thomas.ad 		memset(&sps, 0, sizeof sps);
427 8e1fb8d5 2024-06-13 thomas.ad 		copy = buf;
428 8e1fb8d5 2024-06-13 thomas.ad 
429 f141d2d1 2024-06-14 op 		copy = str_trim_whitespace(copy);
430 8e1fb8d5 2024-06-13 thomas.ad 
431 22d3f8e4 2024-06-14 op 		if (*copy == '#' || *copy == '\0') {
432 8e1fb8d5 2024-06-13 thomas.ad 			free(buf);
433 8e1fb8d5 2024-06-13 thomas.ad 			continue;
434 8e1fb8d5 2024-06-13 thomas.ad 		}
435 8e1fb8d5 2024-06-13 thomas.ad 
436 8e1fb8d5 2024-06-13 thomas.ad 		if (parse_mailcap_line(copy) == -1) {
437 8e1fb8d5 2024-06-13 thomas.ad 			fprintf(stderr, "Error with entry: <<%s>>, line: %ld\n",
438 8e1fb8d5 2024-06-13 thomas.ad 			    copy, line);
439 8e1fb8d5 2024-06-13 thomas.ad 		}
440 f141d2d1 2024-06-14 op 		free(buf);
441 8e1fb8d5 2024-06-13 thomas.ad 	}
442 8e1fb8d5 2024-06-13 thomas.ad }
443 8e1fb8d5 2024-06-13 thomas.ad 
444 8e1fb8d5 2024-06-13 thomas.ad struct mailcap *
445 8e1fb8d5 2024-06-13 thomas.ad mailcap_cmd_from_mimetype(char *mime_type, char *filename)
446 8e1fb8d5 2024-06-13 thomas.ad {
447 dcdea5d1 2024-06-14 op 	struct mailcap	*mc = NULL;
448 8e1fb8d5 2024-06-13 thomas.ad 
449 8e1fb8d5 2024-06-13 thomas.ad 	if (mime_type == NULL || filename == NULL)
450 8e1fb8d5 2024-06-13 thomas.ad 		return (NULL);
451 8e1fb8d5 2024-06-13 thomas.ad 
452 8e1fb8d5 2024-06-13 thomas.ad 	if ((mc = mailcap_by_mimetype(mime_type)) != NULL)
453 8e1fb8d5 2024-06-13 thomas.ad 		mailcap_expand_cmd(mc, mime_type, filename);
454 8e1fb8d5 2024-06-13 thomas.ad 
455 8e1fb8d5 2024-06-13 thomas.ad 	return (mc);
456 8e1fb8d5 2024-06-13 thomas.ad }