3 * mhcachesbr.c -- routines to manipulate the MIME content cache
7 * This code is Copyright (c) 2002, by the authors of nmh. See the
8 * COPYRIGHT file in the root directory of the nmh distribution for
9 * complete copyright information.
14 #include <h/signals.h>
22 #include <h/mhparse.h>
23 #include <h/mhcachesbr.h>
26 #ifdef TIME_WITH_SYS_TIME
27 # include <sys/time.h>
30 # ifdef TM_IN_SYS_TIME
31 # include <sys/time.h>
37 #ifdef HAVE_SYS_WAIT_H
38 # include <sys/wait.h>
43 extern pid_t xpid; /* mhshowsbr.c or mhbuildsbr.c */
46 int rcachesw = CACHE_ASK;
47 int wcachesw = CACHE_ASK;
50 * Location of public and private cache. These must
51 * be set before these routines are called.
57 /* mhparse.c (OR) mhbuildsbr.c */
61 int part_ok (CT, int);
62 int type_ok (CT, int);
63 int make_intermediates (char *);
64 void content_error (char *, CT, char *, ...);
65 void flush_errors (void);
70 void cache_all_messages (CT *);
71 int find_cache (CT, int, int *, char *, char *, int);
76 static void cache_content (CT);
77 static int find_cache_aux (int, char *, char *, char *, int);
78 static int find_cache_aux2 (char *, char *, char *, int);
82 * Top level entry point to cache content
83 * from a group of messages
87 cache_all_messages (CT *cts)
91 for (ctp = cts; *ctp; ctp++) {
93 if (type_ok (ct, 1)) {
100 (*ct->c_ceclosefnx) (ct);
108 * Entry point to cache content from external sources.
112 cache_content (CT ct)
115 char *file, cachefile[BUFSIZ];
116 CE ce = ct->c_cefile;
119 advise (NULL, "no %s: field in %s", ID_FIELD, ct->c_file);
124 advise (NULL, "unable to decode %s", ct->c_file);
128 /* THIS NEEDS TO BE FIXED */
130 if (ct->c_ceopenfnx == openMail) {
131 advise (NULL, "a radish may no know Greek, but I do...");
136 if (find_cache (NULL, wcachesw != CACHE_NEVER ? wcachesw : CACHE_ASK,
137 &cachetype, ct->c_id, cachefile, sizeof(cachefile))
139 advise (NULL, "unable to cache %s's contents", ct->c_file);
142 if (wcachesw != CACHE_NEVER && wcachesw != CACHE_ASK) {
144 fprintf (stderr, "caching message %s as file %s\n", ct->c_file,
149 int mask = umask (cachetype ? ~m_gmprot () : 0222);
153 fprintf (stderr, "caching by copying %s...\n", ce->ce_file);
156 if ((*ct->c_ceopenfnx) (ct, &file) == NOTOK)
159 if ((fp = fopen (cachefile, "w"))) {
162 FILE *gp = ce->ce_fp;
164 fseek (gp, 0L, SEEK_SET);
166 while ((cc = fread (buffer, sizeof(*buffer), sizeof(buffer), gp))
168 fwrite (buffer, sizeof(*buffer), cc, fp);
172 admonish (ce->ce_file, "error reading");
176 admonish (cachefile, "error writing");
182 content_error (cachefile, ct, "unable to fopen for writing");
187 fprintf (stderr, "in place caching...\n");
190 if ((*ct->c_ceopenfnx) (ct, &file) != NOTOK)
191 chmod (cachefile, cachetype ? m_gmprot () : 0444);
197 find_cache (CT ct, int policy, int *writing, char *id,
198 char *buffer, int buflen)
207 fprintf (stderr, "find_cache %s(%d) %s %s\n", caches[policy].sw,
208 policy, writing ? "writing" : "reading", id);
219 && find_cache_aux (writing ? 2 : 0, cache_private, id,
220 buffer, buflen) == OK) {
221 if (access (buffer, R_OK) != NOTOK) {
231 && find_cache_aux (writing ? 1 : 0, cache_public, id,
232 buffer, buflen) == OK) {
233 if (writing || access (buffer, R_OK) != NOTOK) {
243 && find_cache_aux (writing ? 2 : 0, cache_private, id,
244 buffer, buflen) == OK) {
245 if (writing || access (buffer, R_OK) != NOTOK)
252 if (status == OK && policy == CACHE_ASK) {
254 char *bp, query[BUFSIZ];
259 pidcheck (pidwait (xpid, NOTOK));
263 /* Get buffer ready to go */
265 buflen = sizeof(query);
267 /* Now, construct query */
269 snprintf (bp, buflen, "Make cached, publically-accessible copy");
273 snprintf (bp, buflen, "Use cached copy");
279 snprintf (bp, buflen, " of content %s", ct->c_partno);
286 snprintf (bp, buflen, " (size %lu octets)",
287 (unsigned long) st.st_size);
293 snprintf (bp, buflen, "\n in file %s? ", buffer);
295 /* Now, check answer */
296 if (!getanswer (query))
300 if (status == OK && writing) {
301 if (*writing && strchr(buffer, '/'))
302 make_intermediates (buffer);
312 find_cache_aux (int writing, char *directory, char *id,
313 char *buffer, int buflen)
316 char mapfile[BUFSIZ], mapname[BUFSIZ];
318 static int partno, pid;
319 static time_t clock = 0;
322 usemap = strchr (id, '/') ? 1 : 0;
328 fprintf (stderr, "find_cache_aux %s usemap=%d\n", directory, usemap);
330 snprintf (mapfile, sizeof(mapfile), "%s/cache.map", directory);
331 if (find_cache_aux2 (mapfile, id, mapname, sizeof(mapname)) == OK)
339 snprintf (buffer, buflen, "%s/%s", directory, id);
343 if (!usemap && access (mapfile, W_OK) == NOTOK)
366 snprintf (mapname, sizeof(mapname), "%08x%04x%02x",
367 (unsigned int) (clock & 0xffffffff),
368 (unsigned int) (pid & 0xffff),
369 (unsigned int) (partno++ & 0xff));
372 fprintf (stderr, "creating mapping %s->%s\n", mapname, id);
374 make_intermediates (mapfile);
375 mask = umask (writing == 2 ? 0077 : 0);
376 if (!(fp = lkfopen (mapfile, "a")) && errno == ENOENT) {
379 if ((fd = creat (mapfile, 0666)) != NOTOK) {
381 fp = lkfopen (mapfile, "a");
387 fprintf (fp, "%s: %s\n", mapname, id);
388 lkfclose (fp, mapfile);
392 strncpy (buffer, mapname, buflen);
394 snprintf (buffer, buflen, "%s/%s", directory, mapname);
396 fprintf (stderr, "use %s\n", buffer);
403 find_cache_aux2 (char *mapfile, char *id, char *mapname, int namelen)
406 char buf[BUFSIZ], name[NAMESZ];
409 if (!(fp = lkfopen (mapfile, "r")))
412 for (state = FLD;;) {
416 switch (state = m_getfld (state, name, buf, sizeof(buf), fp)) {
420 strncpy (mapname, name, namelen);
421 if (state != FLDPLUS)
424 cp = add (buf, NULL);
425 while (state == FLDPLUS) {
426 state = m_getfld (state, name, buf, sizeof(buf), fp);
434 fprintf (stderr, "compare %s to %s <- %s\n", id, dp,
436 result = strcmp (id, dp);
439 lkfclose (fp, mapfile);
455 lkfclose (fp, mapfile);