2 ** mhcachesbr.c -- routines to manipulate the MIME content cache
4 ** This code is Copyright (c) 2002, by the authors of nmh. See the
5 ** COPYRIGHT file in the root directory of the nmh distribution for
6 ** complete copyright information.
11 #include <h/signals.h>
19 #include <h/mhparse.h>
20 #include <h/mhcachesbr.h>
23 #ifdef TIME_WITH_SYS_TIME
24 # include <sys/time.h>
27 # ifdef TM_IN_SYS_TIME
28 # include <sys/time.h>
34 #ifdef HAVE_SYS_WAIT_H
35 # include <sys/wait.h>
40 extern pid_t xpid; /* mhshowsbr.c or mhbuildsbr.c */
43 int rcachesw = CACHE_ASK;
44 int wcachesw = CACHE_ASK;
47 ** Location of public and private cache. These must
48 ** be set before these routines are called.
54 /* mhparse.c (OR) mhbuildsbr.c */
60 int make_intermediates(char *);
61 void content_error(char *, CT, char *, ...);
62 void flush_errors(void);
67 void cache_all_messages(CT *);
68 int find_cache(CT, int, int *, char *, char *, int);
73 static void cache_content(CT);
74 static int find_cache_aux(int, char *, char *, char *, int);
75 static int find_cache_aux2(char *, char *, char *, int);
79 ** Top level entry point to cache content
80 ** from a group of messages
84 cache_all_messages(CT *cts)
88 for (ctp = cts; *ctp; ctp++) {
97 (*ct->c_ceclosefnx) (ct);
105 ** Entry point to cache content from external sources.
112 char *file, cachefile[BUFSIZ];
113 CE ce = ct->c_cefile;
116 advise(NULL, "no %s: field in %s", ID_FIELD, ct->c_file);
121 advise(NULL, "unable to decode %s", ct->c_file);
125 /* THIS NEEDS TO BE FIXED */
127 if (ct->c_ceopenfnx == openMail) {
128 advise(NULL, "a radish may no know Greek, but I do...");
133 if (find_cache(NULL, wcachesw != CACHE_NEVER ? wcachesw : CACHE_ASK,
134 &cachetype, ct->c_id, cachefile, sizeof(cachefile))
136 advise(NULL, "unable to cache %s's contents", ct->c_file);
139 if (wcachesw != CACHE_NEVER && wcachesw != CACHE_ASK) {
141 fprintf(stderr, "caching message %s as file %s\n", ct->c_file,
146 int mask = umask(cachetype ? ~m_gmprot() : 0222);
150 fprintf(stderr, "caching by copying %s...\n",
154 if ((*ct->c_ceopenfnx) (ct, &file) == NOTOK)
157 if ((fp = fopen(cachefile, "w"))) {
160 FILE *gp = ce->ce_fp;
162 fseek(gp, 0L, SEEK_SET);
164 while ((cc = fread(buffer, sizeof(*buffer),
165 sizeof(buffer), gp)) > 0)
166 fwrite(buffer, sizeof(*buffer), cc, fp);
170 admonish(ce->ce_file, "error reading");
174 admonish(cachefile, "error writing");
180 content_error(cachefile, ct,
181 "unable to fopen for writing");
186 fprintf(stderr, "in place caching...\n");
189 if ((*ct->c_ceopenfnx) (ct, &file) != NOTOK)
190 chmod(cachefile, cachetype ? m_gmprot() : 0444);
196 find_cache(CT ct, int policy, int *writing, char *id, char *buffer, int buflen)
205 fprintf(stderr, "find_cache %s(%d) %s %s\n",
206 caches[policy].sw, policy,
207 writing ? "writing" : "reading", id);
216 if (cache_private && !writing &&
217 find_cache_aux(writing ? 2 : 0,
218 cache_private, id, buffer, buflen)
220 if (access(buffer, R_OK) != NOTOK) {
229 if (cache_public && find_cache_aux(writing ? 1 : 0,
230 cache_public, id, buffer, buflen)
232 if (writing || access(buffer, R_OK) != NOTOK) {
241 if (cache_private && find_cache_aux(writing ? 2 : 0,
242 cache_private, id, buffer, buflen)
244 if (writing || access(buffer, R_OK) != NOTOK)
251 if (status == OK && policy == CACHE_ASK) {
253 char *bp, query[BUFSIZ];
258 pidcheck(pidwait(xpid, NOTOK));
262 /* Get buffer ready to go */
264 buflen = sizeof(query);
266 /* Now, construct query */
268 snprintf(bp, buflen, "Make cached, publically-accessible copy");
272 snprintf(bp, buflen, "Use cached copy");
278 snprintf(bp, buflen, " of content %s",
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, char *buffer,
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",
331 snprintf(mapfile, sizeof(mapfile), "%s/cache.map", directory);
332 if (find_cache_aux2(mapfile, id, mapname, sizeof(mapname)) == OK)
340 snprintf(buffer, buflen, "%s/%s", directory, id);
344 if (!usemap && access(mapfile, W_OK) == NOTOK)
367 snprintf(mapname, sizeof(mapname), "%08x%04x%02x",
368 (unsigned int) (clock & 0xffffffff),
369 (unsigned int) (pid & 0xffff),
370 (unsigned int) (partno++ & 0xff));
373 fprintf(stderr, "creating mapping %s->%s\n", mapname, id);
375 make_intermediates(mapfile);
376 mask = umask(writing == 2 ? 0077 : 0);
377 if (!(fp = lkfopen(mapfile, "a")) && errno == ENOENT) {
380 if ((fd = creat(mapfile, 0666)) != NOTOK) {
382 fp = lkfopen(mapfile, "a");
388 fprintf(fp, "%s: %s\n", mapname, id);
389 lkfclose(fp, mapfile);
393 strncpy(buffer, mapname, buflen);
395 snprintf(buffer, buflen, "%s/%s", directory, mapname);
397 fprintf(stderr, "use %s\n", buffer);
404 find_cache_aux2(char *mapfile, char *id, char *mapname, int namelen)
407 char buf[BUFSIZ], name[NAMESZ];
410 if (!(fp = lkfopen(mapfile, "r")))
413 for (state = FLD;;) {
417 switch (state = m_getfld(state, name, buf, sizeof(buf), fp)) {
421 strncpy(mapname, name, namelen);
422 if (state != FLDPLUS)
426 while (state == FLDPLUS) {
427 state = m_getfld(state, name, buf, sizeof(buf), fp);
435 fprintf(stderr, "compare %s to %s <- %s\n", id, dp, mapname);
436 result = strcmp(id, dp);
439 lkfclose(fp, mapfile);
455 lkfclose(fp, mapfile);