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>
20 #include <h/mhparse.h>
21 #include <h/mhcachesbr.h>
24 #ifdef TIME_WITH_SYS_TIME
25 # include <sys/time.h>
28 # ifdef TM_IN_SYS_TIME
29 # include <sys/time.h>
37 extern pid_t xpid; /* mhshowsbr.c or mhbuildsbr.c */
40 int rcachesw = CACHE_ASK;
41 int wcachesw = CACHE_ASK;
44 * Location of public and private cache. These must
45 * be set before these routines are called.
51 /* mhparse.c (OR) mhbuildsbr.c */
55 int part_ok (CT, int);
56 int type_ok (CT, int);
57 int make_intermediates (char *);
58 void content_error (char *, CT, char *, ...);
59 void flush_errors (void);
64 void cache_all_messages (CT *);
65 int find_cache (CT, int, int *, char *, char *, int);
70 static void cache_content (CT);
71 static int find_cache_aux (int, char *, char *, char *, int);
72 static int find_cache_aux2 (char *, char *, char *, int);
76 * Top level entry point to cache content
77 * from a group of messages
81 cache_all_messages (CT *cts)
85 for (ctp = cts; *ctp; ctp++) {
87 if (type_ok (ct, 1)) {
94 (*ct->c_ceclosefnx) (ct);
102 * Entry point to cache content from external sources.
106 cache_content (CT ct)
109 char *file, cachefile[BUFSIZ];
110 CE ce = ct->c_cefile;
113 advise (NULL, "no %s: field in %s", ID_FIELD, ct->c_file);
118 advise (NULL, "unable to decode %s", ct->c_file);
122 /* THIS NEEDS TO BE FIXED */
124 if (ct->c_ceopenfnx == openMail) {
125 advise (NULL, "a radish may no know Greek, but I do...");
130 if (find_cache (NULL, wcachesw != CACHE_NEVER ? wcachesw : CACHE_ASK,
131 &cachetype, ct->c_id, cachefile, sizeof(cachefile))
133 advise (NULL, "unable to cache %s's contents", ct->c_file);
136 if (wcachesw != CACHE_NEVER && wcachesw != CACHE_ASK) {
138 fprintf (stderr, "caching message %s as file %s\n", ct->c_file,
143 int mask = umask (cachetype ? ~m_gmprot () : 0222);
147 fprintf (stderr, "caching by copying %s...\n", ce->ce_file);
150 if ((*ct->c_ceopenfnx) (ct, &file) == NOTOK)
153 if ((fp = fopen (cachefile, "w"))) {
156 FILE *gp = ce->ce_fp;
158 fseek (gp, 0L, SEEK_SET);
160 while ((cc = fread (buffer, sizeof(*buffer), sizeof(buffer), gp))
162 fwrite (buffer, sizeof(*buffer), cc, fp);
166 admonish (ce->ce_file, "error reading");
170 admonish (cachefile, "error writing");
176 content_error (cachefile, ct, "unable to fopen for writing");
181 fprintf (stderr, "in place caching...\n");
184 if ((*ct->c_ceopenfnx) (ct, &file) != NOTOK)
185 chmod (cachefile, cachetype ? m_gmprot () : 0444);
191 find_cache (CT ct, int policy, int *writing, char *id,
192 char *buffer, int buflen)
201 fprintf (stderr, "find_cache %s(%d) %s %s\n", caches[policy].sw,
202 policy, writing ? "writing" : "reading", id);
213 && find_cache_aux (writing ? 2 : 0, cache_private, id,
214 buffer, buflen) == OK) {
215 if (access (buffer, R_OK) != NOTOK) {
225 && find_cache_aux (writing ? 1 : 0, cache_public, id,
226 buffer, buflen) == OK) {
227 if (writing || access (buffer, R_OK) != NOTOK) {
237 && find_cache_aux (writing ? 2 : 0, cache_private, id,
238 buffer, buflen) == OK) {
239 if (writing || access (buffer, R_OK) != NOTOK)
246 if (status == OK && policy == CACHE_ASK) {
248 char *bp, query[BUFSIZ];
253 pidcheck (pidwait (xpid, NOTOK));
257 /* Get buffer ready to go */
259 buflen = sizeof(query);
261 /* Now, construct query */
263 snprintf (bp, buflen, "Make cached, publically-accessible copy");
267 snprintf (bp, buflen, "Use cached copy");
273 snprintf (bp, buflen, " of content %s", ct->c_partno);
280 snprintf (bp, buflen, " (size %lu octets)",
281 (unsigned long) st.st_size);
287 snprintf (bp, buflen, "\n in file %s? ", buffer);
289 /* Now, check answer */
290 if (!getanswer (query))
294 if (status == OK && writing) {
295 if (*writing && strchr(buffer, '/'))
296 make_intermediates (buffer);
306 find_cache_aux (int writing, char *directory, char *id,
307 char *buffer, int buflen)
310 char mapfile[BUFSIZ], mapname[BUFSIZ];
312 static int partno, pid;
313 static time_t clock = 0;
316 usemap = strchr (id, '/') ? 1 : 0;
322 fprintf (stderr, "find_cache_aux %s usemap=%d\n", directory, usemap);
324 snprintf (mapfile, sizeof(mapfile), "%s/cache.map", directory);
325 if (find_cache_aux2 (mapfile, id, mapname, sizeof(mapname)) == OK)
333 snprintf (buffer, buflen, "%s/%s", directory, id);
337 if (!usemap && access (mapfile, W_OK) == NOTOK)
360 snprintf (mapname, sizeof(mapname), "%08x%04x%02x",
361 (unsigned int) (clock & 0xffffffff),
362 (unsigned int) (pid & 0xffff),
363 (unsigned int) (partno++ & 0xff));
366 fprintf (stderr, "creating mapping %s->%s\n", mapname, id);
368 make_intermediates (mapfile);
369 mask = umask (writing == 2 ? 0077 : 0);
370 if (!(fp = lkfopen (mapfile, "a")) && errno == ENOENT) {
373 if ((fd = creat (mapfile, 0666)) != NOTOK) {
375 fp = lkfopen (mapfile, "a");
381 fprintf (fp, "%s: %s\n", mapname, id);
382 lkfclose (fp, mapfile);
386 strncpy (buffer, mapname, buflen);
388 snprintf (buffer, buflen, "%s/%s", directory, mapname);
390 fprintf (stderr, "use %s\n", buffer);
397 find_cache_aux2 (char *mapfile, char *id, char *mapname, int namelen)
400 char buf[BUFSIZ], name[NAMESZ];
403 if (!(fp = lkfopen (mapfile, "r")))
406 for (state = FLD;;) {
410 switch (state = m_getfld (state, name, buf, sizeof(buf), fp)) {
414 strncpy (mapname, name, namelen);
415 if (state != FLDPLUS)
418 cp = add (buf, NULL);
419 while (state == FLDPLUS) {
420 state = m_getfld (state, name, buf, sizeof(buf), fp);
428 fprintf (stderr, "compare %s to %s <- %s\n", id, dp,
430 result = strcmp (id, dp);
433 lkfclose (fp, mapfile);
449 lkfclose (fp, mapfile);