3 * mhcachesbr.c -- routines to manipulate the MIME content cache
5 * This code is Copyright (c) 2002, by the authors of nmh. See the
6 * COPYRIGHT file in the root directory of the nmh distribution for
7 * complete copyright information.
12 #include <h/signals.h>
19 #include <h/mhparse.h>
20 #include <h/mhcachesbr.h>
23 #ifdef HAVE_SYS_TIME_H
24 # include <sys/time.h>
30 extern pid_t xpid; /* mhshowsbr.c or mhbuildsbr.c */
33 int rcachesw = CACHE_ASK;
34 int wcachesw = CACHE_ASK;
37 * Location of public and private cache. These must
38 * be set before these routines are called.
45 int part_ok (CT, int);
46 int type_ok (CT, int);
47 void content_error (char *, CT, char *, ...);
48 void flush_errors (void);
53 void cache_all_messages (CT *);
54 int find_cache (CT, int, int *, char *, char *, int);
59 static void cache_content (CT);
60 static int find_cache_aux (int, char *, char *, char *, int);
61 static int find_cache_aux2 (char *, char *, char *, int);
65 * Top level entry point to cache content
66 * from a group of messages
70 cache_all_messages (CT *cts)
74 for (ctp = cts; *ctp; ctp++) {
76 if (type_ok (ct, 1)) {
83 (*ct->c_ceclosefnx) (ct);
91 * Entry point to cache content from external sources.
98 char *file, cachefile[BUFSIZ];
102 advise (NULL, "no %s: field in %s", ID_FIELD, ct->c_file);
107 advise (NULL, "unable to decode %s", ct->c_file);
111 /* THIS NEEDS TO BE FIXED */
113 if (ct->c_ceopenfnx == openMail) {
114 advise (NULL, "a radish may no know Greek, but I do...");
119 if (find_cache (NULL, wcachesw != CACHE_NEVER ? wcachesw : CACHE_ASK,
120 &cachetype, ct->c_id, cachefile, sizeof(cachefile))
122 advise (NULL, "unable to cache %s's contents", ct->c_file);
125 if (wcachesw != CACHE_NEVER && wcachesw != CACHE_ASK) {
127 fprintf (stderr, "caching message %s as file %s\n", ct->c_file,
132 int mask = umask (cachetype ? ~m_gmprot () : 0222);
136 fprintf (stderr, "caching by copying %s...\n", ce->ce_file);
139 if ((*ct->c_ceopenfnx) (ct, &file) == NOTOK)
142 if ((fp = fopen (cachefile, "w"))) {
145 FILE *gp = ce->ce_fp;
147 fseek (gp, 0L, SEEK_SET);
149 while ((cc = fread (buffer, sizeof(*buffer), sizeof(buffer), gp))
151 fwrite (buffer, sizeof(*buffer), cc, fp);
155 admonish (ce->ce_file, "error reading");
159 admonish (cachefile, "error writing");
165 content_error (cachefile, ct, "unable to fopen for writing");
170 fprintf (stderr, "in place caching...\n");
173 if ((*ct->c_ceopenfnx) (ct, &file) != NOTOK)
174 chmod (cachefile, cachetype ? m_gmprot () : 0444);
180 find_cache (CT ct, int policy, int *writing, char *id,
181 char *buffer, int buflen)
190 fprintf (stderr, "find_cache %s(%d) %s %s\n", caches[policy].sw,
191 policy, writing ? "writing" : "reading", id);
202 && find_cache_aux (writing ? 2 : 0, cache_private, id,
203 buffer, buflen) == OK) {
204 if (access (buffer, R_OK) != NOTOK) {
214 && find_cache_aux (writing ? 1 : 0, cache_public, id,
215 buffer, buflen) == OK) {
216 if (writing || access (buffer, R_OK) != NOTOK) {
226 && find_cache_aux (writing ? 2 : 0, cache_private, id,
227 buffer, buflen) == OK) {
228 if (writing || access (buffer, R_OK) != NOTOK)
235 if (status == OK && policy == CACHE_ASK) {
237 char *bp, query[BUFSIZ];
242 pidcheck (pidwait (xpid, NOTOK));
246 /* Get buffer ready to go */
248 buflen = sizeof(query);
250 /* Now, construct query */
252 snprintf (bp, buflen, "Make cached, publically-accessible copy");
256 snprintf (bp, buflen, "Use cached copy");
262 snprintf (bp, buflen, " of content %s", ct->c_partno);
269 snprintf (bp, buflen, " (size %lu octets)",
270 (unsigned long) st.st_size);
276 snprintf (bp, buflen, "\n in file %s? ", buffer);
278 /* Now, check answer */
279 if (!getanswer (query))
283 if (status == OK && writing) {
284 if (*writing && strchr(buffer, '/'))
285 make_intermediates (buffer);
295 find_cache_aux (int writing, char *directory, char *id,
296 char *buffer, int buflen)
299 char mapfile[BUFSIZ], mapname[BUFSIZ];
301 static int partno, pid;
302 static time_t clock = 0;
307 fprintf (stderr, "find_cache_aux %s usemap=%d\n", directory, usemap);
309 snprintf (mapfile, sizeof(mapfile), "%s/cache.map", directory);
310 if (find_cache_aux2 (mapfile, id, mapname, sizeof(mapname)) == OK)
318 snprintf (buffer, buflen, "%s/%s", directory, id);
322 if (!usemap && access (mapfile, W_OK) == NOTOK)
345 snprintf (mapname, sizeof(mapname), "%08x%04x%02x",
346 (unsigned int) (clock & 0xffffffff),
347 (unsigned int) (pid & 0xffff),
348 (unsigned int) (partno++ & 0xff));
351 fprintf (stderr, "creating mapping %s->%s\n", mapname, id);
353 make_intermediates (mapfile);
354 mask = umask (writing == 2 ? 0077 : 0);
355 if (!(fp = lkfopen (mapfile, "a")) && errno == ENOENT) {
358 if ((fd = creat (mapfile, 0666)) != NOTOK) {
360 fp = lkfopen (mapfile, "a");
366 fprintf (fp, "%s: %s\n", mapname, id);
367 lkfclose (fp, mapfile);
371 strncpy (buffer, mapname, buflen);
373 snprintf (buffer, buflen, "%s/%s", directory, mapname);
375 fprintf (stderr, "use %s\n", buffer);
382 find_cache_aux2 (char *mapfile, char *id, char *mapname, int namelen)
385 char buf[BUFSIZ], name[NAMESZ];
388 if (!(fp = lkfopen (mapfile, "r")))
391 for (state = FLD;;) {
395 switch (state = m_getfld (state, name, buf, sizeof(buf), fp)) {
399 strncpy (mapname, name, namelen);
400 if (state != FLDPLUS)
403 cp = add (buf, NULL);
404 while (state == FLDPLUS) {
405 state = m_getfld (state, name, buf, sizeof(buf), fp);
413 fprintf (stderr, "compare %s to %s <- %s\n", id, dp,
415 result = strcmp (id, dp);
418 lkfclose (fp, mapfile);
434 lkfclose (fp, mapfile);