2 * Copyright notice from original mutt:
3 * Copyright (C) 1996-2000 Michael R. Elkins <me@mutt.org>
5 * This file is part of mutt-ng, see http://www.muttng.org/.
6 * It's licensed under the GNU General Public License,
7 * please see the file GPL in the top level source directory.
11 * rfc1524 defines a format for the Multimedia Mail Configuration, which
12 * is the standard mailcap file format under Unix which specifies what
13 * external programs should be used to view/compose/edit multimedia files
14 * based on content type.
16 * This file contains various functions for implementing a fair subset of
33 #include <lib-lib/mem.h>
34 #include <lib-lib/str.h>
35 #include <lib-lib/ascii.h>
36 #include <lib-lib/macros.h>
37 #include <lib-lib/file.h>
39 #include <lib-sys/unix.h>
45 /* The command semantics include the following:
46 * %s is the filename that contains the mail body data
47 * %t is the content type, like text/plain
48 * %{parameter} is replaced by the parameter value from the content-type field
50 * Unsupported rfc1524 parameters: these would probably require some doing
51 * by mutt, and can probably just be done by piping the message to metamail
52 * %n is the integer number of sub-parts in the multipart
53 * %F is "content-type filename" repeated for each sub-part
55 * In addition, this function returns a 0 if the command works on a file,
56 * and 1 if the command works on a pipe.
58 int rfc1524_expand_command (BODY * a, char *filename, char *_type,
59 char *command, int clen)
63 char buf[LONG_STRING];
64 char type[LONG_STRING];
66 m_strcpy(type, sizeof(type), _type);
68 if (option (OPTMAILCAPSANITIZE))
69 mutt_sanitize_filename (type, 0);
71 while (command[x] && x < clen && y < ssizeof (buf)) {
72 if (command[x] == '\\') {
74 buf[y++] = command[x++];
76 else if (command[x] == '%') {
78 if (command[x] == '{') {
85 while (command[x] && command[x] != '}' && z < ssizeof (param))
86 param[z++] = command[x++];
89 _pvalue = mutt_get_parameter (param, a->parameter);
90 m_strcpy(pvalue, sizeof(pvalue), NONULL(_pvalue));
91 if (option (OPTMAILCAPSANITIZE))
92 mutt_sanitize_filename (pvalue, 0);
94 y += mutt_quote_filename (buf + y, sizeof (buf) - y, pvalue);
96 else if (command[x] == 's' && filename != NULL) {
97 y += mutt_quote_filename (buf + y, sizeof (buf) - y, filename);
100 else if (command[x] == 't') {
101 y += mutt_quote_filename (buf + y, sizeof (buf) - y, type);
106 buf[y++] = command[x++];
109 m_strcpy(command, clen, buf);
114 /* NUL terminates a rfc 1524 field,
115 * returns start of next field or NULL */
116 static char *get_field (char *s)
123 while ((ch = strpbrk (s, ";\\")) != NULL) {
131 ch = vskipspaces(ch);
139 static int get_field_text (char *field, char **entry,
140 char *type, char *filename, int line)
142 field = vskipspaces(field);
145 field = vskipspaces(field + 1);
146 m_strreplace(entry, field);
151 mutt_error (_("Improperly formated entry for type %s in \"%s\" line %d"),
152 type, filename, line);
157 static int rfc1524_mailcap_parse (BODY * a,
159 char *type, rfc1524_entry * entry, int opt)
174 /* rfc1524 mailcap file is of the format:
175 * base/type; command; extradefs
176 * type can be * for matching all
177 * base with no /type is an implicit wild
178 * command contains a %s for the filename to pass, default to pipe on stdin
179 * extradefs are of the form:
180 * def1="definition"; def2="define \;";
181 * line wraps with a \ at the end of the line
185 /* find length of basetype */
186 if ((ch = strchr (type, '/')) == NULL)
190 if ((fp = fopen (filename, "r")) != NULL) {
191 while (!found && (buf = mutt_read_line(buf, &buflen, fp, &line)) != NULL) {
192 /* ignore comments */
197 ch = get_field (buf);
198 if (ascii_strcasecmp (buf, type) && (ascii_strncasecmp (buf, type, btlen) || (buf[btlen] != 0 && /* implicit wild */
199 m_strcmp(buf + btlen, "/*")))) /* wildsubtype */
202 /* next field is the viewcommand */
206 entry->command = m_strdup(field);
208 /* parse the optional fields */
210 copiousoutput = FALSE;
211 composecommand = FALSE;
213 printcommand = FALSE;
219 if (!ascii_strcasecmp (field, "needsterminal")) {
221 entry->needsterminal = TRUE;
223 else if (!ascii_strcasecmp (field, "copiousoutput")) {
224 copiousoutput = TRUE;
226 entry->copiousoutput = TRUE;
228 else if (!ascii_strncasecmp (field, "composetyped", 12)) {
229 /* this compare most occur before compose to match correctly */
231 (field + 12, entry ? &entry->composetypecommand : NULL, type,
233 composecommand = TRUE;
235 else if (!ascii_strncasecmp (field, "compose", 7)) {
237 (field + 7, entry ? &entry->composecommand : NULL, type,
239 composecommand = TRUE;
241 else if (!ascii_strncasecmp (field, "print", 5)) {
242 if (get_field_text (field + 5, entry ? &entry->printcommand : NULL,
243 type, filename, line))
246 else if (!ascii_strncasecmp (field, "edit", 4)) {
247 if (get_field_text (field + 4, entry ? &entry->editcommand : NULL,
248 type, filename, line))
251 else if (!ascii_strncasecmp (field, "nametemplate", 12)) {
252 get_field_text (field + 12, entry ? &entry->nametemplate : NULL,
253 type, filename, line);
255 else if (!ascii_strncasecmp (field, "x-convert", 9)) {
256 get_field_text (field + 9, entry ? &entry->convert : NULL,
257 type, filename, line);
259 else if (!ascii_strncasecmp (field, "test", 4)) {
261 * This routine executes the given test command to determine
262 * if this is the right entry.
264 char *test_command = NULL;
267 if (get_field_text (field + 4, &test_command, type, filename, line)
269 len = m_strlen(test_command) + STRING;
270 p_realloc(&test_command, len);
271 rfc1524_expand_command (a, a->filename, type, test_command, len);
272 if (mutt_system (test_command)) {
273 /* a non-zero exit code means test failed */
276 p_delete(&test_command);
281 if (opt == M_AUTOVIEW) {
285 else if (opt == M_COMPOSE) {
289 else if (opt == M_EDIT) {
293 else if (opt == M_PRINT) {
301 p_delete(&entry->command);
302 p_delete(&entry->composecommand);
303 p_delete(&entry->composetypecommand);
304 p_delete(&entry->editcommand);
305 p_delete(&entry->printcommand);
306 p_delete(&entry->nametemplate);
307 p_delete(&entry->convert);
308 entry->needsterminal = 0;
309 entry->copiousoutput = 0;
312 } /* while (!found && (buf = mutt_read_line ())) */
314 } /* if ((fp = fopen ())) */
319 rfc1524_entry *rfc1524_new_entry (void)
321 return p_new(rfc1524_entry, 1);
324 void rfc1524_free_entry (rfc1524_entry ** entry)
326 rfc1524_entry *p = *entry;
328 p_delete(&p->command);
329 p_delete(&p->testcommand);
330 p_delete(&p->composecommand);
331 p_delete(&p->composetypecommand);
332 p_delete(&p->editcommand);
333 p_delete(&p->printcommand);
334 p_delete(&p->nametemplate);
339 * rfc1524_mailcap_lookup attempts to find the given type in the
340 * list of mailcap files. On success, this returns the entry information
341 * in *entry, and returns 1. On failure (not found), returns 0.
342 * If entry == NULL just return 1 if the given type is found.
344 int rfc1524_mailcap_lookup (BODY * a, char *type, rfc1524_entry * entry,
347 char path[_POSIX_PATH_MAX];
350 char *curr = MailcapPath;
352 /* rfc1524 specifies that a path of mailcap files should be searched.
354 * $HOME/.mailcap:/etc/mailcap:/usr/etc/mailcap:/usr/local/etc/mailcap, etc
355 * and overriden by the MAILCAPS environment variable, and, just to be nice,
356 * we'll make it specifiable in .muttrc
358 if (!curr || !*curr) {
359 mutt_error _("No mailcap path specified");
364 mutt_check_lookup_list (a, type, SHORT_STRING);
366 while (!found && *curr) {
368 while (*curr && *curr != ':' && x < ssizeof (path) - 1) {
379 mutt_expand_path (path, sizeof (path));
381 found = rfc1524_mailcap_parse (a, path, type, entry, opt);
385 mutt_error (_("mailcap entry for type %s not found"), type);
391 /* This routine will create a _temporary_ filename matching the
392 * name template given if this needs to be done.
394 * Please note that only the last path element of the
395 * template and/or the old file name will be used for the
396 * comparison and the temporary file name.
398 * Returns 0 if oldfile is fine as is.
399 * Returns 1 if newfile specified
402 int rfc1524_expand_filename (char *nametemplate,
403 char *oldfile, char *newfile, ssize_t nflen)
407 short lmatch = 0, rmatch = 0;
408 char left[_POSIX_PATH_MAX];
409 char right[_POSIX_PATH_MAX];
413 /* first, ignore leading path components.
416 if (nametemplate && (s = strrchr (nametemplate, '/')))
417 nametemplate = s + 1;
419 if (oldfile && (s = strrchr (oldfile, '/')))
424 m_strcpy(newfile, nflen, oldfile);
427 mutt_expand_fmt (newfile, nflen, nametemplate, "mutt");
429 else { /* oldfile && nametemplate */
432 /* first, compare everything left from the "%s"
438 for (i = 0; nametemplate[i]; i++) {
439 if (nametemplate[i] == '%' && nametemplate[i + 1] == 's') {
444 /* note that the following will _not_ read beyond oldfile's end. */
446 if (lmatch && nametemplate[i] != oldfile[i])
452 /* If we had a "%s", check the rest. */
454 /* now, for the right part: compare everything right from
455 * the "%s" to the final part of oldfile.
457 * The logic here is as follows:
459 * - We start reading from the end.
460 * - There must be a match _right_ from the "%s",
462 * - If there was a left hand match, this stuff
463 * must not be counted again. That's done by the
464 * condition (j >= (lmatch ? i : 0)).
469 for (r = 0, j = m_strlen(oldfile) - 1, k =
470 m_strlen(nametemplate) - 1;
471 j >= (lmatch ? i : 0) && k >= i + 2; j--, k--) {
472 if (nametemplate[k] != oldfile[j]) {
478 /* Now, check if we had a full match. */
486 m_strncpy(left, sizeof(left), nametemplate, i);
491 m_strcpy(right, sizeof(right), nametemplate + i + 2);
493 snprintf (newfile, nflen, "%s%s%s", left, oldfile, right);
496 /* no "%s" in the name template. */
497 m_strcpy(newfile, nflen, nametemplate);
501 mutt_adv_mktemp (NULL, newfile, nflen);
503 if (rmatch && lmatch)
510 /* If rfc1524_expand_command() is used on a recv'd message, then
511 * the filename doesn't exist yet, but if its used while sending a message,
512 * then we need to rename the existing file.
514 * This function returns 0 on successful move, 1 on old file doesn't exist,
515 * 2 on new file already exists, and 3 on other failure.
518 /* note on access(2) use: No dangling symlink problems here due to
522 int _mutt_rename_file (char *oldfile, char *newfile, int overwrite)
526 if (access (oldfile, F_OK) != 0)
528 if (!overwrite && access (newfile, F_OK) == 0)
530 if ((ofp = fopen (oldfile, "r")) == NULL)
532 if ((nfp = safe_fopen (newfile, "w")) == NULL) {
536 mutt_copy_stream (ofp, nfp);
539 mutt_unlink (oldfile);
543 int mutt_rename_file (char *oldfile, char *newfile)
545 return _mutt_rename_file (oldfile, newfile, 0);