+++ /dev/null
-/*
-** mhcachesbr.c -- routines to manipulate the MIME content cache
-**
-** This code is Copyright (c) 2002, by the authors of nmh. See the
-** COPYRIGHT file in the root directory of the nmh distribution for
-** complete copyright information.
-*/
-
-#include <h/mh.h>
-#include <fcntl.h>
-#include <h/signals.h>
-#include <errno.h>
-#include <setjmp.h>
-#include <signal.h>
-#include <h/tws.h>
-#include <h/mime.h>
-#include <h/mhparse.h>
-#include <h/mhcachesbr.h>
-#include <h/utils.h>
-
-#ifdef HAVE_SYS_TIME_H
-# include <sys/time.h>
-#endif
-#include <time.h>
-
-extern int debugsw;
-
-extern pid_t xpid; /* mhshowsbr.c or mhbuild.c */
-
-/* cache policies */
-int rcachesw = CACHE_ASK;
-int wcachesw = CACHE_ASK;
-
-/*
-** Location of public and private cache. These must
-** be set before these routines are called.
-*/
-char *cache_public;
-char *cache_private;
-
-
-/* mhparse.c (OR) mhbuild.c */
-int pidcheck (int);
-
-/* mhmisc.c */
-int part_ok(CT, int);
-int type_ok(CT, int);
-int make_intermediates(char *);
-void content_error(char *, CT, char *, ...);
-void flush_errors(void);
-
-/*
-** prototypes
-*/
-void cache_all_messages(CT *);
-int find_cache(CT, int, int *, char *, char *, int);
-
-/*
-** static prototypes
-*/
-static void cache_content(CT);
-static int find_cache_aux(int, char *, char *, char *, int);
-static int find_cache_aux2(char *, char *, char *, int);
-
-
-/*
-** Top level entry point to cache content
-** from a group of messages
-*/
-
-void
-cache_all_messages(CT *cts)
-{
- CT ct, *ctp;
-
- for (ctp = cts; *ctp; ctp++) {
- ct = *ctp;
- if (type_ok(ct, 1)) {
- cache_content(ct);
- if (ct->c_fp) {
- fclose(ct->c_fp);
- ct->c_fp = NULL;
- }
- if (ct->c_ceclosefnx)
- (*ct->c_ceclosefnx) (ct);
- }
- }
- flush_errors();
-}
-
-
-/*
-** Entry point to cache content from external sources.
-*/
-
-static void
-cache_content(CT ct)
-{
- int cachetype;
- char *file, cachefile[BUFSIZ];
- CE ce = ct->c_cefile;
-
- if (!ct->c_id) {
- advise(NULL, "no %s: field in %s", ID_FIELD, ct->c_file);
- return;
- }
-
- if (!ce) {
- advise(NULL, "unable to decode %s", ct->c_file);
- return;
- }
-
-/* THIS NEEDS TO BE FIXED */
-#if 0
- if (ct->c_ceopenfnx == openMail) {
- advise(NULL, "a radish may no know Greek, but I do...");
- return;
- }
-#endif
-
- if (find_cache(NULL, wcachesw != CACHE_NEVER ? wcachesw : CACHE_ASK,
- &cachetype, ct->c_id, cachefile, sizeof(cachefile))
- == NOTOK) {
- advise(NULL, "unable to cache %s's contents", ct->c_file);
- return;
- }
- if (wcachesw != CACHE_NEVER && wcachesw != CACHE_ASK) {
- fflush(stdout);
- fprintf(stderr, "caching message %s as file %s\n", ct->c_file,
- cachefile);
- }
-
- if (ce->ce_file) {
- int mask = umask(cachetype ? ~m_gmprot() : 0222);
- FILE *fp;
-
- if (debugsw)
- fprintf(stderr, "caching by copying %s...\n",
- ce->ce_file);
-
- file = NULL;
- if ((*ct->c_ceopenfnx) (ct, &file) == NOTOK)
- goto reset_umask;
-
- if ((fp = fopen(cachefile, "w"))) {
- int cc;
- char buffer[BUFSIZ];
- FILE *gp = ce->ce_fp;
-
- fseek(gp, 0L, SEEK_SET);
-
- while ((cc = fread(buffer, sizeof(*buffer),
- sizeof(buffer), gp)) > 0)
- fwrite(buffer, sizeof(*buffer), cc, fp);
- fflush(fp);
-
- if (ferror(gp)) {
- admonish(ce->ce_file, "error reading");
- unlink(cachefile);
- } else {
- if (ferror(fp)) {
- admonish(cachefile, "error writing");
- unlink(cachefile);
- }
- }
- fclose(fp);
- } else
- content_error(cachefile, ct,
- "unable to fopen for writing");
-reset_umask:
- umask(mask);
- } else {
- if (debugsw)
- fprintf(stderr, "in place caching...\n");
-
- file = cachefile;
- if ((*ct->c_ceopenfnx) (ct, &file) != NOTOK)
- chmod(cachefile, cachetype ? m_gmprot() : 0444);
- }
-}
-
-
-int
-find_cache(CT ct, int policy, int *writing, char *id, char *buffer, int buflen)
-{
- int status = NOTOK;
-
- if (id == NULL)
- return NOTOK;
- id = trimcpy(id);
-
- if (debugsw)
- fprintf(stderr, "find_cache %s(%d) %s %s\n",
- caches[policy].sw, policy,
- writing ? "writing" : "reading", id);
-
- switch (policy) {
- case CACHE_NEVER:
- default:
- break;
-
- case CACHE_ASK:
- case CACHE_PUBLIC:
- if (cache_private && !writing &&
- find_cache_aux(writing ? 2 : 0,
- cache_private, id, buffer, buflen) == OK) {
- if (access(buffer, R_OK) != NOTOK) {
-got_private:
- if (writing)
- *writing = 1;
-got_it:
- status = OK;
- break;
- }
- }
- if (cache_public && find_cache_aux(writing ? 1 : 0,
- cache_public, id, buffer, buflen) == OK) {
- if (writing || access(buffer, R_OK) != NOTOK) {
- if (writing)
- *writing = 0;
- goto got_it;
- }
- }
- break;
-
- case CACHE_PRIVATE:
- if (cache_private && find_cache_aux(writing ? 2 : 0,
- cache_private, id, buffer, buflen) == OK) {
- if (writing || access(buffer, R_OK) != NOTOK)
- goto got_private;
- }
- break;
-
- }
-
- if (status == OK && policy == CACHE_ASK) {
- int len, buflen;
- char *bp, query[BUFSIZ];
-
- if (xpid) {
- if (xpid < 0)
- xpid = -xpid;
- pidcheck(pidwait(xpid, NOTOK));
- xpid = 0;
- }
-
- /* Get buffer ready to go */
- bp = query;
- buflen = sizeof(query);
-
- /* Now, construct query */
- if (writing) {
- snprintf(bp, buflen, "Make cached, publically-accessible copy");
- } else {
- struct stat st;
-
- snprintf(bp, buflen, "Use cached copy");
- len = strlen(bp);
- bp += len;
- buflen -= len;
-
- if (ct->c_partno) {
- snprintf(bp, buflen, " of content %s",
- ct->c_partno);
- len = strlen(bp);
- bp += len;
- buflen -= len;
- }
-
- stat(buffer, &st);
- snprintf(bp, buflen, " (size %lu octets)",
- (unsigned long) st.st_size);
- }
- len = strlen(bp);
- bp += len;
- buflen -= len;
-
- snprintf(bp, buflen, "\n in file %s? ", buffer);
-
- /* Now, check answer */
- if (!getanswer(query))
- status = NOTOK;
- }
-
- if (status == OK && writing) {
- if (*writing && strchr(buffer, '/'))
- make_intermediates(buffer);
- unlink(buffer);
- }
-
- free(id);
- return status;
-}
-
-
-static int
-find_cache_aux(int writing, char *directory, char *id, char *buffer,
- int buflen)
-{
- int mask, usemap;
- char mapfile[BUFSIZ], mapname[BUFSIZ];
- FILE *fp;
- static int partno, pid;
- static time_t clock = 0;
- usemap = 1;
-
- if (debugsw)
- fprintf(stderr, "find_cache_aux %s usemap=%d\n",
- directory, usemap);
-
- snprintf(mapfile, sizeof(mapfile), "%s/cache.map", directory);
- if (find_cache_aux2(mapfile, id, mapname, sizeof(mapname)) == OK)
- goto done_map;
-
- if (!writing) {
- if (usemap)
- return NOTOK;
-
-use_raw:
- snprintf(buffer, buflen, "%s/%s", directory, id);
- return OK;
- }
-
- if (!usemap && access(mapfile, W_OK) == NOTOK)
- goto use_raw;
-
- if (clock != 0) {
- time_t now;
-
- time(&now);
- if (now > clock)
- clock = 0;
- } else {
- pid = getpid();
- }
-
- if (clock == 0) {
- time(&clock);
- partno = 0;
- } else {
- if (partno > 0xff) {
- clock++;
- partno = 0;
- }
- }
-
- snprintf(mapname, sizeof(mapname), "%08x%04x%02x",
- (unsigned int) (clock & 0xffffffff),
- (unsigned int) (pid & 0xffff),
- (unsigned int) (partno++ & 0xff));
-
- if (debugsw)
- fprintf(stderr, "creating mapping %s->%s\n", mapname, id);
-
- make_intermediates(mapfile);
- mask = umask(writing == 2 ? 0077 : 0);
- if (!(fp = lkfopen(mapfile, "a")) && errno == ENOENT) {
- int fd;
-
- if ((fd = creat(mapfile, 0666)) != NOTOK) {
- close(fd);
- fp = lkfopen(mapfile, "a");
- }
- }
- umask(mask);
- if (!fp)
- return NOTOK;
- fprintf(fp, "%s: %s\n", mapname, id);
- lkfclose(fp, mapfile);
-
-done_map:
- if (*mapname == '/')
- strncpy(buffer, mapname, buflen);
- else
- snprintf(buffer, buflen, "%s/%s", directory, mapname);
- if (debugsw)
- fprintf(stderr, "use %s\n", buffer);
-
- return OK;
-}
-
-
-static int
-find_cache_aux2(char *mapfile, char *id, char *mapname, int namelen)
-{
- int state;
- char buf[BUFSIZ], name[NAMESZ];
- FILE *fp;
-
- if (!(fp = lkfopen(mapfile, "r")))
- return NOTOK;
-
- for (state = FLD;;) {
- int result;
- char *cp, *dp;
-
- switch (state = m_getfld(state, name, buf, sizeof(buf), fp)) {
- case FLD:
- case FLDPLUS:
- case FLDEOF:
- strncpy(mapname, name, namelen);
- if (state != FLDPLUS)
- cp = buf;
- else {
- cp = getcpy(buf);
- while (state == FLDPLUS) {
- state = m_getfld(state, name, buf,
- sizeof(buf), fp);
- cp = add(buf, cp);
- }
- }
- dp = trimcpy(cp);
- if (cp != buf)
- free(cp);
- if (debugsw)
- fprintf(stderr, "compare %s to %s <- %s\n",
- id, dp, mapname);
- result = strcmp(id, dp);
- free(dp);
- if (result == 0) {
- lkfclose(fp, mapfile);
- return OK;
- }
- if (state != FLDEOF)
- continue;
- /* else fall... */
-
- case BODY:
- case BODYEOF:
- case FILEEOF:
- default:
- break;
- }
- break;
- }
-
- lkfclose(fp, mapfile);
- return NOTOK;
-}
projects / mmh / blobdiff