/*
* Copyright notice from original mutt:
* Copyright (C) 1996-2002 Michael R. Elkins <me@mutt.org>
* Copyright (C) 1999-2002 Thomas Roessler <roessler@does-not-exist.org>
*
* This file is part of mutt-ng, see http://www.muttng.org/.
* It's licensed under the GNU General Public License,
* please see the file GPL in the top level source directory.
*/
/*
* This file contains routines specific to MH and ``maildir'' style
* mailboxes.
*/
#if HAVE_CONFIG_H
# include "config.h"
#endif
#include "mutt.h"
#include "mx.h"
#include "mh.h"
#include "mbox.h"
#include "copy.h"
#include "buffy.h"
#include "sort.h"
#include "thread.h"
#include "hcache.h"
#include "lib/mem.h"
#include "lib/intl.h"
#include "lib/str.h"
#include "lib/debug.h"
#include <sys/stat.h>
#include <sys/types.h>
#include <dirent.h>
#include <limits.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>
#include <utime.h>
#if HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
struct maildir {
HEADER *h;
char *canon_fname;
unsigned header_parsed:1;
#ifdef USE_INODESORT
ino_t inode;
#endif /* USE_INODESORT */
struct maildir *next;
};
struct mh_sequences {
int max;
short *flags;
};
/* mh_sequences support */
#define MH_SEQ_UNSEEN (1 << 0)
#define MH_SEQ_REPLIED (1 << 1)
#define MH_SEQ_FLAGGED (1 << 2)
/* prototypes */
static int maildir_check_empty (const char*);
static int maildir_check_mailbox (CONTEXT*, int*, int);
static int mh_check_mailbox (CONTEXT*, int*, int);
static void mhs_alloc (struct mh_sequences *mhs, int i)
{
int j;
int newmax;
if (i > mhs->max || !mhs->flags) {
newmax = i + 128;
mem_realloc (&mhs->flags, sizeof (mhs->flags[0]) * (newmax + 1));
for (j = mhs->max + 1; j <= newmax; j++)
mhs->flags[j] = 0;
mhs->max = newmax;
}
}
static void mhs_free_sequences (struct mh_sequences *mhs)
{
mem_free (&mhs->flags);
}
static short mhs_check (struct mh_sequences *mhs, int i)
{
if (!mhs->flags || i > mhs->max)
return 0;
else
return mhs->flags[i];
}
static short mhs_set (struct mh_sequences *mhs, int i, short f)
{
mhs_alloc (mhs, i);
mhs->flags[i] |= f;
return mhs->flags[i];
}
#if 0
/* unused */
static short mhs_unset (struct mh_sequences *mhs, int i, short f)
{
mhs_alloc (mhs, i);
mhs->flags[i] &= ~f;
return mhs->flags[i];
}
#endif
static void mh_read_token (char *t, int *first, int *last)
{
char *p;
if ((p = strchr (t, '-'))) {
*p++ = '\0';
*first = atoi (t);
*last = atoi (p);
}
else
*first = *last = atoi (t);
}
static void mh_read_sequences (struct mh_sequences *mhs, const char *path)
{
FILE *fp;
int line = 1;
char *buff = NULL;
char *t;
size_t sz = 0;
short f;
int first, last;
char pathname[_POSIX_PATH_MAX];
snprintf (pathname, sizeof (pathname), "%s/.mh_sequences", path);
if (!(fp = fopen (pathname, "r")))
return;
while ((buff = mutt_read_line (buff, &sz, fp, &line))) {
if (!(t = strtok (buff, " \t:")))
continue;
if (!str_cmp (t, MhUnseen))
f = MH_SEQ_UNSEEN;
else if (!str_cmp (t, MhFlagged))
f = MH_SEQ_FLAGGED;
else if (!str_cmp (t, MhReplied))
f = MH_SEQ_REPLIED;
else /* unknown sequence */
continue;
while ((t = strtok (NULL, " \t:"))) {
mh_read_token (t, &first, &last);
for (; first <= last; first++)
mhs_set (mhs, first, f);
}
}
mem_free (&buff);
safe_fclose (&fp);
}
int mh_buffy (const char *path)
{
int i, r = 0;
struct mh_sequences mhs;
memset (&mhs, 0, sizeof (mhs));
mh_read_sequences (&mhs, path);
for (i = 0; !r && i <= mhs.max; i++)
if (mhs_check (&mhs, i) & MH_SEQ_UNSEEN)
r = 1;
mhs_free_sequences (&mhs);
return r;
}
static int mh_mkstemp (CONTEXT * dest, FILE ** fp, char **tgt)
{
int fd;
char path[_POSIX_PATH_MAX];
FOREVER {
snprintf (path, _POSIX_PATH_MAX, "%s/.mutt-%s-%d-%d",
dest->path, NONULL (Hostname), (int) getpid (), Counter++);
umask (Umask);
if ((fd = open (path, O_WRONLY | O_EXCL | O_CREAT, 0666)) == -1) {
if (errno != EEXIST) {
mutt_perror (path);
return -1;
}
}
else {
*tgt = str_dup (path);
break;
}
}
if ((*fp = fdopen (fd, "w")) == NULL) {
mem_free (tgt);
close (fd);
unlink (path);
return (-1);
}
return 0;
}
static void mhs_write_one_sequence (FILE * fp, struct mh_sequences *mhs,
short f, const char *tag)
{
int i;
int first, last;
fprintf (fp, "%s:", tag);
first = -1;
last = -1;
for (i = 0; i <= mhs->max; i++) {
if ((mhs_check (mhs, i) & f)) {
if (first < 0)
first = i;
else
last = i;
}
else if (first >= 0) {
if (last < 0)
fprintf (fp, " %d", first);
else
fprintf (fp, " %d-%d", first, last);
first = -1;
last = -1;
}
}
if (first >= 0) {
if (last < 0)
fprintf (fp, " %d", first);
else
fprintf (fp, " %d-%d", first, last);
}
fputc ('\n', fp);
}
/* XXX - we don't currently remove deleted messages from sequences we don't know. Should we? */
void mh_update_sequences (CONTEXT * ctx)
{
FILE *ofp, *nfp;
char sequences[_POSIX_PATH_MAX];
char *tmpfname;
char *buff = NULL;
char *p;
size_t s;
int l = 0;
int i;
int unseen = 0;
int flagged = 0;
int replied = 0;
char seq_unseen[STRING];
char seq_replied[STRING];
char seq_flagged[STRING];
struct mh_sequences mhs;
memset (&mhs, 0, sizeof (mhs));
snprintf (seq_unseen, sizeof (seq_unseen), "%s:", NONULL (MhUnseen));
snprintf (seq_replied, sizeof (seq_replied), "%s:", NONULL (MhReplied));
snprintf (seq_flagged, sizeof (seq_flagged), "%s:", NONULL (MhFlagged));
if (mh_mkstemp (ctx, &nfp, &tmpfname) != 0) {
/* error message? */
return;
}
snprintf (sequences, sizeof (sequences), "%s/.mh_sequences", ctx->path);
/* first, copy unknown sequences */
if ((ofp = fopen (sequences, "r"))) {
while ((buff = mutt_read_line (buff, &s, ofp, &l))) {
if (!str_ncmp (buff, seq_unseen, str_len (seq_unseen)))
continue;
if (!str_ncmp (buff, seq_flagged, str_len (seq_flagged)))
continue;
if (!str_ncmp (buff, seq_replied, str_len (seq_replied)))
continue;
fprintf (nfp, "%s\n", buff);
}
}
safe_fclose (&ofp);
/* now, update our unseen, flagged, and replied sequences */
for (l = 0; l < ctx->msgcount; l++) {
if (ctx->hdrs[l]->deleted)
continue;
if ((p = strrchr (ctx->hdrs[l]->path, '/')))
p++;
else
p = ctx->hdrs[l]->path;
i = atoi (p);
if (!ctx->hdrs[l]->read) {
mhs_set (&mhs, i, MH_SEQ_UNSEEN);
unseen++;
}
if (ctx->hdrs[l]->flagged) {
mhs_set (&mhs, i, MH_SEQ_FLAGGED);
flagged++;
}
if (ctx->hdrs[l]->replied) {
mhs_set (&mhs, i, MH_SEQ_REPLIED);
replied++;
}
}
/* write out the new sequences */
if (unseen)
mhs_write_one_sequence (nfp, &mhs, MH_SEQ_UNSEEN, NONULL (MhUnseen));
if (flagged)
mhs_write_one_sequence (nfp, &mhs, MH_SEQ_FLAGGED, NONULL (MhFlagged));
if (replied)
mhs_write_one_sequence (nfp, &mhs, MH_SEQ_REPLIED, NONULL (MhReplied));
mhs_free_sequences (&mhs);
/* try to commit the changes - no guarantee here */
safe_fclose (&nfp);
unlink (sequences);
if (safe_rename (tmpfname, sequences) != 0) {
/* report an error? */
unlink (tmpfname);
}
mem_free (&tmpfname);
}
static void mh_sequences_add_one (CONTEXT * ctx, int n, short unseen,
short flagged, short replied)
{
short unseen_done = 0;
short flagged_done = 0;
short replied_done = 0;
FILE *ofp = NULL, *nfp = NULL;
char *tmpfname;
char sequences[_POSIX_PATH_MAX];
char seq_unseen[STRING];
char seq_replied[STRING];
char seq_flagged[STRING];
char *buff = NULL;
int line;
size_t sz;
if (mh_mkstemp (ctx, &nfp, &tmpfname) == -1)
return;
snprintf (seq_unseen, sizeof (seq_unseen), "%s:", NONULL (MhUnseen));
snprintf (seq_replied, sizeof (seq_replied), "%s:", NONULL (MhReplied));
snprintf (seq_flagged, sizeof (seq_flagged), "%s:", NONULL (MhFlagged));
snprintf (sequences, sizeof (sequences), "%s/.mh_sequences", ctx->path);
if ((ofp = fopen (sequences, "r"))) {
while ((buff = mutt_read_line (buff, &sz, ofp, &line))) {
if (unseen && !strncmp (buff, seq_unseen, str_len (seq_unseen))) {
fprintf (nfp, "%s %d\n", buff, n);
unseen_done = 1;
}
else if (flagged
&& !strncmp (buff, seq_flagged, str_len (seq_flagged))) {
fprintf (nfp, "%s %d\n", buff, n);
flagged_done = 1;
}
else if (replied
&& !strncmp (buff, seq_replied, str_len (seq_replied))) {
fprintf (nfp, "%s %d\n", buff, n);
replied_done = 1;
}
else
fprintf (nfp, "%s\n", buff);
}
}
safe_fclose (&ofp);
mem_free (&buff);
if (!unseen_done && unseen)
fprintf (nfp, "%s: %d\n", NONULL (MhUnseen), n);
if (!flagged_done && flagged)
fprintf (nfp, "%s: %d\n", NONULL (MhFlagged), n);
if (!replied_done && replied)
fprintf (nfp, "%s: %d\n", NONULL (MhReplied), n);
safe_fclose (&nfp);
unlink (sequences);
if (safe_rename (tmpfname, sequences) != 0)
unlink (tmpfname);
mem_free (&tmpfname);
}
static void mh_update_maildir (struct maildir *md, struct mh_sequences *mhs)
{
int i;
short f;
char *p;
for (; md; md = md->next) {
if ((p = strrchr (md->h->path, '/')))
p++;
else
p = md->h->path;
i = atoi (p);
f = mhs_check (mhs, i);
md->h->read = (f & MH_SEQ_UNSEEN) ? 0 : 1;
md->h->flagged = (f & MH_SEQ_FLAGGED) ? 1 : 0;
md->h->replied = (f & MH_SEQ_REPLIED) ? 1 : 0;
}
}
/* maildir support */
static void maildir_free_entry (struct maildir **md)
{
if (!md || !*md)
return;
mem_free (&(*md)->canon_fname);
if ((*md)->h)
mutt_free_header (&(*md)->h);
mem_free (md);
}
static void maildir_free_maildir (struct maildir **md)
{
struct maildir *p, *q;
if (!md || !*md)
return;
for (p = *md; p; p = q) {
q = p->next;
maildir_free_entry (&p);
}
}
static void maildir_parse_flags (HEADER * h, const char *path)
{
char *p, *q = NULL;
h->flagged = 0;
h->read = 0;
h->replied = 0;
if ((p = strrchr (path, ':')) != NULL && str_ncmp (p + 1, "2,", 2) == 0) {
p += 3;
str_replace (&h->maildir_flags, p);
q = h->maildir_flags;
while (*p) {
switch (*p) {
case 'F':
h->flagged = 1;
break;
case 'S': /* seen */
h->read = 1;
break;
case 'R': /* replied */
h->replied = 1;
break;
case 'T': /* trashed */
h->trash = 1;
h->deleted = 1;
break;
default:
*q++ = *p;
break;
}
p++;
}
}
if (q == h->maildir_flags)
mem_free (&h->maildir_flags);
else if (q)
*q = '\0';
}
static void maildir_update_mtime (CONTEXT * ctx)
{
char buf[_POSIX_PATH_MAX];
struct stat st;
if (ctx->magic == M_MAILDIR) {
snprintf (buf, sizeof (buf), "%s/%s", ctx->path, "cur");
if (stat (buf, &st) == 0)
ctx->mtime_cur = st.st_mtime;
snprintf (buf, sizeof (buf), "%s/%s", ctx->path, "new");
}
else {
snprintf (buf, sizeof (buf), "%s/.mh_sequences", ctx->path);
if (stat (buf, &st) == 0)
ctx->mtime_cur = st.st_mtime;
strfcpy (buf, ctx->path, sizeof (buf));
}
if (stat (buf, &st) == 0)
ctx->mtime = st.st_mtime;
}
/*
* Actually parse a maildir message. This may also be used to fill
* out a fake header structure generated by lazy maildir parsing.
*/
static HEADER *maildir_parse_message (int magic, const char *fname,
int is_old, HEADER * _h)
{
FILE *f;
HEADER *h = _h;
struct stat st;
if ((f = fopen (fname, "r")) != NULL) {
if (!h)
h = mutt_new_header ();
h->env = mutt_read_rfc822_header (f, h, 0, 0);
fstat (fileno (f), &st);
fclose (f);
if (!h->received)
h->received = h->date_sent;
if (h->content->length <= 0)
h->content->length = st.st_size - h->content->offset;
h->index = -1;
if (magic == M_MAILDIR) {
/*
* maildir stores its flags in the filename, so ignore the
* flags in the header of the message
*/
h->old = is_old;
maildir_parse_flags (h, fname);
}
return h;
}
return NULL;
}
/*
* Note that this routine will _not_ modify the context given by
* ctx.
*
* It's used in the first parsing pass on maildir and MH folders.
* In the MH case, this means full parsing of the folder. In the
* maildir case, it means that we only look at flags, and create a
* fake HEADER structure, which may later be filled in by
* maildir_parse_message(), when called from
* maildir_delayed_parsing().
*
*/
static int maildir_parse_entry (CONTEXT * ctx, struct maildir ***last,
const char *subdir, const char *fname,
int *count, int is_old, ino_t inode)
{
struct maildir *entry;
HEADER *h = NULL;
char buf[_POSIX_PATH_MAX];
if (subdir)
snprintf (buf, sizeof (buf), "%s/%s/%s", ctx->path, subdir, fname);
else
snprintf (buf, sizeof (buf), "%s/%s", ctx->path, fname);
if (ctx->magic == M_MH)
h = maildir_parse_message (ctx->magic, buf, is_old, NULL);
else {
h = mutt_new_header ();
h->old = is_old;
maildir_parse_flags (h, buf);
}
if (h != NULL) {
if (count) {
(*count)++;
if (!ctx->quiet && ReadInc && ((*count % ReadInc) == 0 || *count == 1))
mutt_message (_("Reading %s... %d"), ctx->path, *count);
}
if (subdir) {
snprintf (buf, sizeof (buf), "%s/%s", subdir, fname);
h->path = str_dup (buf);
}
else
h->path = str_dup (fname);
entry = mem_calloc (sizeof (struct maildir), 1);
entry->h = h;
entry->header_parsed = (ctx->magic == M_MH);
#ifdef USE_INODESORT
entry->inode = inode;
#endif /* USE_INODESORT */
**last = entry;
*last = &entry->next;
return 0;
}
return -1;
}
/* Ignore the garbage files. A valid MH message consists of only
* digits. Deleted message get moved to a filename with a comma before
* it.
*/
int mh_valid_message (const char *s)
{
for (; *s; s++) {
if (!isdigit ((unsigned char) *s))
return 0;
}
return 1;
}
static int maildir_parse_dir (CONTEXT * ctx, struct maildir ***last,
const char *subdir, int *count)
{
DIR *dirp;
struct dirent *de;
char buf[_POSIX_PATH_MAX];
int is_old = 0;
if (subdir) {
snprintf (buf, sizeof (buf), "%s/%s", ctx->path, subdir);
is_old = (str_cmp ("cur", subdir) == 0);
}
else
strfcpy (buf, ctx->path, sizeof (buf));
if ((dirp = opendir (buf)) == NULL)
return -1;
while ((de = readdir (dirp)) != NULL) {
if ((ctx->magic == M_MH && !mh_valid_message (de->d_name))
|| (ctx->magic == M_MAILDIR && *de->d_name == '.'))
continue;
/* FOO - really ignore the return value? */
debug_print (2, ("parsing %s\n", de->d_name));
maildir_parse_entry (ctx, last, subdir, de->d_name, count, is_old,
#if HAVE_DIRENT_D_INO
de->d_ino
#else
0
#endif
);
}
closedir (dirp);
return 0;
}
static int maildir_add_to_context (CONTEXT * ctx, struct maildir *md)
{
int oldmsgcount = ctx->msgcount;
while (md) {
debug_print (2, ("considering %s\n", NONULL (md->canon_fname)));
if (md->h) {
debug_print (2, ("flags: %s%s%s%s%s\n", md->h->flagged ? "f" : "",
md->h->deleted ? "D" : "", md->h->replied ? "r" : "",
md->h->old ? "O" : "", md->h->read ? "R" : ""));
if (ctx->msgcount == ctx->hdrmax)
mx_alloc_memory (ctx);
ctx->hdrs[ctx->msgcount] = md->h;
ctx->hdrs[ctx->msgcount]->index = ctx->msgcount;
ctx->size +=
md->h->content->length + md->h->content->offset -
md->h->content->hdr_offset;
md->h = NULL;
ctx->msgcount++;
}
md = md->next;
}
if (ctx->msgcount > oldmsgcount) {
mx_update_context (ctx, ctx->msgcount - oldmsgcount);
return 1;
}
return 0;
}
static int maildir_move_to_context (CONTEXT * ctx, struct maildir **md)
{
int r;
r = maildir_add_to_context (ctx, *md);
maildir_free_maildir (md);
return r;
}
#ifdef USE_INODESORT
/*
* Merge two maildir lists according to the inode numbers.
*/
static struct maildir *maildir_merge_inode (struct maildir *left,
struct maildir *right)
{
struct maildir *head;
struct maildir *tail;
if (left && right) {
if (left->inode < right->inode) {
head = left;
left = left->next;
}
else {
head = right;
right = right->next;
}
}
else {
if (left)
return left;
else
return right;
}
tail = head;
while (left && right) {
if (left->inode < right->inode) {
tail->next = left;
left = left->next;
}
else {
tail->next = right;
right = right->next;
}
tail = tail->next;
}
if (left) {
tail->next = left;
}
else {
tail->next = right;
}
return head;
}
/*
* Sort maildir list according to inode.
*/
static struct maildir *maildir_sort_inode (struct maildir *list)
{
struct maildir *left = list;
struct maildir *right = list;
if (!list || !list->next) {
return list;
}
list = list->next;
while (list && list->next) {
right = right->next;
list = list->next->next;
}
list = right;
right = right->next;
list->next = 0;
left = maildir_sort_inode (left);
right = maildir_sort_inode (right);
return maildir_merge_inode (left, right);
}
#endif /* USE_INODESORT */
#if USE_HCACHE
static size_t maildir_hcache_keylen (const char *fn)
{
const char *p = strchr (fn, ':');
return p ? (size_t) (p - fn) : str_len (fn);
}
#endif
/*
* This function does the second parsing pass for a maildir-style
* folder.
*/
void maildir_delayed_parsing (CONTEXT * ctx, struct maildir *md)
{
struct maildir *p;
char fn[_POSIX_PATH_MAX];
int count;
#if USE_HCACHE
void *hc = NULL;
void *data;
struct timeval *when = NULL;
struct stat lastchanged;
int ret;
hc = mutt_hcache_open (HeaderCache, ctx->path);
#endif
for (p = md, count = 0; p; p = p->next, count++) {
if (!(p && p->h && !p->header_parsed))
continue;
#if USE_HCACHE
data = mutt_hcache_fetch (hc, p->h->path + 3, &maildir_hcache_keylen);
when = (struct timeval *) data;
#endif
if (!ctx->quiet && ReadInc && ((count % ReadInc) == 0 || count == 1))
mutt_message (_("Reading %s... %d"), ctx->path, count);
snprintf (fn, sizeof (fn), "%s/%s", ctx->path, p->h->path);
#if USE_HCACHE
if (option (OPTHCACHEVERIFY)) {
ret = stat (fn, &lastchanged);
}
else {
lastchanged.st_mtime = 0;
ret = 0;
}
if (data != NULL && !ret && lastchanged.st_mtime <= when->tv_sec) {
p->h = mutt_hcache_restore ((unsigned char *) data, &p->h);
maildir_parse_flags (p->h, fn);
}
else
#endif
if (maildir_parse_message (ctx->magic, fn, p->h->old, p->h)) {
p->header_parsed = 1;
maildir_parse_flags (p->h, fn);
#if USE_HCACHE
mutt_hcache_store (hc, p->h->path + 3, p->h, 0, &maildir_hcache_keylen);
#endif
}
else
mutt_free_header (&p->h);
#if USE_HCACHE
mem_free (&data);
#endif
}
#if USE_HCACHE
mutt_hcache_close (hc);
#endif
}
/* Read a MH/maildir style mailbox.
*
* args:
* ctx [IN/OUT] context for this mailbox
* subdir [IN] NULL for MH mailboxes, otherwise the subdir of the
* maildir mailbox to read from
*/
static int _mh_read_dir (CONTEXT * ctx, const char *subdir)
{
struct maildir *md;
struct mh_sequences mhs;
struct maildir **last;
int count;
memset (&mhs, 0, sizeof (mhs));
maildir_update_mtime (ctx);
md = NULL;
last = &md;
count = 0;
if (maildir_parse_dir (ctx, &last, subdir, &count) == -1)
return -1;
if (ctx->magic == M_MH) {
mh_read_sequences (&mhs, ctx->path);
mh_update_maildir (md, &mhs);
mhs_free_sequences (&mhs);
}
#ifdef USE_INODESORT
md = maildir_sort_inode (md);
#endif /* USE_INODESORT */
if (ctx->magic == M_MAILDIR)
maildir_delayed_parsing (ctx, md);
maildir_move_to_context (ctx, &md);
return 0;
}
static int mh_read_dir (CONTEXT* ctx) {
return (_mh_read_dir (ctx, NULL));
}
/* read a maildir style mailbox */
static int maildir_read_dir (CONTEXT * ctx)
{
/* maildir looks sort of like MH, except that there are two subdirectories
* of the main folder path from which to read messages
*/
if (_mh_read_dir (ctx, "new") == -1 || _mh_read_dir (ctx, "cur") == -1)
return (-1);
return 0;
}
/*
* Open a new (temporary) message in an MH folder.
*/
static int mh_open_new_message (MESSAGE * msg, CONTEXT * dest, HEADER * hdr)
{
return mh_mkstemp (dest, &msg->fp, &msg->path);
}
int ch_compar (const void *a, const void *b)
{
return (int) (*((const char *) a) - *((const char *) b));
}
static void maildir_flags (char *dest, size_t destlen, HEADER * hdr)
{
*dest = '\0';
/*
* The maildir specification requires that all files in the cur
* subdirectory have the :unique string appeneded, regardless of whether
* or not there are any flags. If .old is set, we know that this message
* will end up in the cur directory, so we include it in the following
* test even though there is no associated flag.
*/
if (hdr
&& (hdr->flagged || hdr->replied || hdr->read || hdr->deleted
|| hdr->old || hdr->maildir_flags)) {
char tmp[LONG_STRING];
snprintf (tmp, sizeof (tmp),
"%s%s%s%s%s",
hdr->flagged ? "F" : "",
hdr->replied ? "R" : "",
hdr->read ? "S" : "", hdr->deleted ? "T" : "",
NONULL (hdr->maildir_flags));
if (hdr->maildir_flags)
qsort (tmp, str_len (tmp), 1, ch_compar);
snprintf (dest, destlen, ":2,%s", tmp);
}
}
/*
* Open a new (temporary) message in a maildir folder.
*
* Note that this uses _almost_ the maildir file name format, but
* with a {cur,new} prefix.
*
*/
static int maildir_open_new_message (MESSAGE * msg, CONTEXT * dest, HEADER * hdr)
{
int fd;
char path[_POSIX_PATH_MAX];
char suffix[16];
char subdir[16];
if (hdr) {
short deleted = hdr->deleted;
hdr->deleted = 0;
maildir_flags (suffix, sizeof (suffix), hdr);
hdr->deleted = deleted;
}
else
*suffix = '\0';
if (hdr && (hdr->read || hdr->old))
strfcpy (subdir, "cur", sizeof (subdir));
else
strfcpy (subdir, "new", sizeof (subdir));
FOREVER {
snprintf (path, _POSIX_PATH_MAX, "%s/tmp/%s.%ld.%u_%d.%s%s",
dest->path, subdir, (long) time (NULL),
(unsigned int) getpid (), Counter++, NONULL (Hostname), suffix);
debug_print (2, ("trying %s.\n", path));
umask (Umask);
if ((fd = open (path, O_WRONLY | O_EXCL | O_CREAT, 0666)) == -1) {
if (errno != EEXIST) {
mutt_perror (path);
return -1;
}
}
else {
debug_print (2, ("success.\n"));
msg->path = str_dup (path);
break;
}
}
if ((msg->fp = fdopen (fd, "w")) == NULL) {
mem_free (&msg->path);
close (fd);
unlink (path);
return (-1);
}
return 0;
}
/*
* Commit a message to a maildir folder.
*
* msg->path contains the file name of a file in tmp/. We take the
* flags from this file's name.
*
* ctx is the mail folder we commit to.
*
* hdr is a header structure to which we write the message's new
* file name. This is used in the mh and maildir folder synch
* routines. When this routine is invoked from mx_commit_message,
* hdr is NULL.
*
* msg->path looks like this:
*
* tmp/{cur,new}.mutt-HOSTNAME-PID-COUNTER:flags
*
* See also maildir_open_new_message().
*
*/
static int maildir_commit_message (MESSAGE * msg, CONTEXT * ctx, HEADER * hdr)
{
char subdir[4];
char suffix[16];
char path[_POSIX_PATH_MAX];
char full[_POSIX_PATH_MAX];
char *s;
if (safe_fclose (&msg->fp) != 0)
return -1;
/* extract the subdir */
s = strrchr (msg->path, '/') + 1;
strfcpy (subdir, s, 4);
/* extract the flags */
if ((s = strchr (s, ':')))
strfcpy (suffix, s, sizeof (suffix));
else
suffix[0] = '\0';
/* construct a new file name. */
FOREVER {
snprintf (path, _POSIX_PATH_MAX, "%s/%ld.%u_%d.%s%s", subdir,
(long) time (NULL), (unsigned int) getpid (), Counter++,
NONULL (Hostname), suffix);
snprintf (full, _POSIX_PATH_MAX, "%s/%s", ctx->path, path);
debug_print (2, ("renaming %s to %s.\n", msg->path, full));
if (safe_rename (msg->path, full) == 0) {
if (hdr)
str_replace (&hdr->path, path);
mem_free (&msg->path);
/*
* Adjust the mtime on the file to match the time at which this
* message was received. Currently this is only set when copying
* messages between mailboxes, so we test to ensure that it is
* actually set.
*/
if (msg->received) {
struct utimbuf ut;
ut.actime = msg->received;
ut.modtime = msg->received;
if (utime (full, &ut)) {
mutt_perror (_
("maildir_commit_message(): unable to set time on file"));
return -1;
}
}
return 0;
}
else if (errno != EEXIST) {
mutt_perror (ctx->path);
return -1;
}
}
}
/*
* commit a message to an MH folder.
*
*/
static int _mh_commit_message (MESSAGE * msg, CONTEXT * ctx, HEADER * hdr,
short updseq)
{
DIR *dirp;
struct dirent *de;
char *cp, *dep;
unsigned int n, hi = 0;
char path[_POSIX_PATH_MAX];
char tmp[16];
if (safe_fclose (&msg->fp) != 0)
return -1;
if ((dirp = opendir (ctx->path)) == NULL) {
mutt_perror (ctx->path);
return (-1);
}
/* figure out what the next message number is */
while ((de = readdir (dirp)) != NULL) {
dep = de->d_name;
if (*dep == ',')
dep++;
cp = dep;
while (*cp) {
if (!isdigit ((unsigned char) *cp))
break;
cp++;
}
if (!*cp) {
n = atoi (dep);
if (n > hi)
hi = n;
}
}
closedir (dirp);
/*
* Now try to rename the file to the proper name.
*
* Note: We may have to try multiple times, until we find a free
* slot.
*/
FOREVER {
hi++;
snprintf (tmp, sizeof (tmp), "%d", hi);
snprintf (path, sizeof (path), "%s/%s", ctx->path, tmp);
if (safe_rename (msg->path, path) == 0) {
if (hdr)
str_replace (&hdr->path, tmp);
mem_free (&msg->path);
break;
}
else if (errno != EEXIST) {
mutt_perror (ctx->path);
return -1;
}
}
if (updseq)
mh_sequences_add_one (ctx, hi, !msg->flags.read, msg->flags.flagged,
msg->flags.replied);
return 0;
}
static int mh_commit_message (MESSAGE * msg, CONTEXT * ctx, HEADER * hdr) {
return _mh_commit_message (msg, ctx, hdr, 1);
}
/* Sync a message in an MH folder.
*
* This code is also used for attachment deletion in maildir
* folders.
*/
static int mh_rewrite_message (CONTEXT * ctx, int msgno)
{
HEADER *h = ctx->hdrs[msgno];
MESSAGE *dest;
int rc;
short restore = 1;
char oldpath[_POSIX_PATH_MAX];
char newpath[_POSIX_PATH_MAX];
char partpath[_POSIX_PATH_MAX];
long old_body_offset = h->content->offset;
long old_body_length = h->content->length;
long old_hdr_lines = h->lines;
if ((dest = mx_open_new_message (ctx, h, 0)) == NULL)
return -1;
if ((rc = mutt_copy_message (dest->fp, ctx, h,
M_CM_UPDATE, CH_UPDATE | CH_UPDATE_LEN)) == 0)
{
snprintf (oldpath, _POSIX_PATH_MAX, "%s/%s", ctx->path, h->path);
strfcpy (partpath, h->path, _POSIX_PATH_MAX);
if (ctx->magic == M_MAILDIR)
rc = maildir_commit_message (dest, ctx, h);
else
rc = _mh_commit_message (dest, ctx, h, 0);
mx_close_message (&dest);
if (rc == 0) {
unlink (oldpath);
restore = 0;
}
/*
* Try to move the new message to the old place.
* (MH only.)
*
* This is important when we are just updating flags.
*
* Note that there is a race condition against programs which
* use the first free slot instead of the maximum message
* number. Mutt does _not_ behave like this.
*
* Anyway, if this fails, the message is in the folder, so
* all what happens is that a concurrently runnung mutt will
* lose flag modifications.
*/
if (ctx->magic == M_MH && rc == 0) {
snprintf (newpath, _POSIX_PATH_MAX, "%s/%s", ctx->path, h->path);
if ((rc = safe_rename (newpath, oldpath)) == 0)
str_replace (&h->path, partpath);
}
}
else
mx_close_message (&dest);
if (rc == -1 && restore) {
h->content->offset = old_body_offset;
h->content->length = old_body_length;
h->lines = old_hdr_lines;
}
mutt_free_body (&h->content->parts);
return rc;
}
static int mh_sync_message (CONTEXT * ctx, int msgno)
{
HEADER *h = ctx->hdrs[msgno];
if (h->attach_del ||
(h->env && (h->env->refs_changed || h->env->irt_changed)))
if (mh_rewrite_message (ctx, msgno) != 0)
return -1;
return 0;
}
static int maildir_sync_message (CONTEXT * ctx, int msgno)
{
HEADER *h = ctx->hdrs[msgno];
if (h->attach_del ||
(h->env && (h->env->refs_changed || h->env->irt_changed))) {
/* when doing attachment deletion/rethreading, fall back to the MH case. */
if (mh_rewrite_message (ctx, msgno) != 0)
return (-1);
}
else {
/* we just have to rename the file. */
char newpath[_POSIX_PATH_MAX];
char partpath[_POSIX_PATH_MAX];
char fullpath[_POSIX_PATH_MAX];
char oldpath[_POSIX_PATH_MAX];
char suffix[16];
char *p;
if ((p = strrchr (h->path, '/')) == NULL) {
debug_print (1, ("%s: unable to find subdir!\n", h->path));
return (-1);
}
p++;
strfcpy (newpath, p, sizeof (newpath));
/* kill the previous flags */
if ((p = strchr (newpath, ':')) != NULL)
*p = 0;
maildir_flags (suffix, sizeof (suffix), h);
snprintf (partpath, sizeof (partpath), "%s/%s%s",
(h->read || h->old) ? "cur" : "new", newpath, suffix);
snprintf (fullpath, sizeof (fullpath), "%s/%s", ctx->path, partpath);
snprintf (oldpath, sizeof (oldpath), "%s/%s", ctx->path, h->path);
if (str_cmp (fullpath, oldpath) == 0) {
/* message hasn't really changed */
return 0;
}
/* record that the message is possibly marked as trashed on disk */
h->trash = h->deleted;
if (rename (oldpath, fullpath) != 0) {
mutt_perror ("rename");
return (-1);
}
str_replace (&h->path, partpath);
}
return (0);
}
static int mh_sync_mailbox (CONTEXT * ctx, int unused, int *index_hint)
{
char path[_POSIX_PATH_MAX], tmp[_POSIX_PATH_MAX];
int i, j;
#if USE_HCACHE
void *hc = NULL;
#endif /* USE_HCACHE */
if (ctx->magic == M_MH)
i = mh_check_mailbox (ctx, index_hint, 0);
else
i = maildir_check_mailbox (ctx, index_hint, 0);
if (i != 0)
return i;
#if USE_HCACHE
if (ctx->magic == M_MAILDIR)
hc = mutt_hcache_open (HeaderCache, ctx->path);
#endif /* USE_HCACHE */
for (i = 0; i < ctx->msgcount; i++) {
if (ctx->hdrs[i]->deleted
&& (ctx->magic != M_MAILDIR || !option (OPTMAILDIRTRASH))) {
snprintf (path, sizeof (path), "%s/%s", ctx->path, ctx->hdrs[i]->path);
if (ctx->magic == M_MAILDIR
|| (option (OPTMHPURGE) && ctx->magic == M_MH)) {
#if USE_HCACHE
if (ctx->magic == M_MAILDIR)
mutt_hcache_delete (hc, ctx->hdrs[i]->path + 3,
&maildir_hcache_keylen);
#endif /* USE_HCACHE */
unlink (path);
}
else if (ctx->magic == M_MH) {
/* MH just moves files out of the way when you delete them */
if (*ctx->hdrs[i]->path != ',') {
snprintf (tmp, sizeof (tmp), "%s/,%s", ctx->path,
ctx->hdrs[i]->path);
unlink (tmp);
rename (path, tmp);
}
}
}
else if (ctx->hdrs[i]->changed || ctx->hdrs[i]->attach_del ||
(ctx->magic == M_MAILDIR
&& (option (OPTMAILDIRTRASH) || ctx->hdrs[i]->trash)
&& (ctx->hdrs[i]->deleted != ctx->hdrs[i]->trash))) {
if (ctx->magic == M_MAILDIR) {
if (maildir_sync_message (ctx, i) == -1)
goto err;
}
else {
if (mh_sync_message (ctx, i) == -1)
goto err;
}
}
}
#if USE_HCACHE
if (ctx->magic == M_MAILDIR)
mutt_hcache_close (hc);
#endif /* USE_HCACHE */
if (ctx->magic == M_MH)
mh_update_sequences (ctx);
/* XXX race condition? */
maildir_update_mtime (ctx);
/* adjust indices */
if (ctx->deleted) {
for (i = 0, j = 0; i < ctx->msgcount; i++) {
if (!ctx->hdrs[i]->deleted
|| (ctx->magic == M_MAILDIR && option (OPTMAILDIRTRASH)))
ctx->hdrs[i]->index = j++;
}
}
return 0;
err:
#if USE_HCACHE
if (ctx->magic == M_MAILDIR)
mutt_hcache_close (hc);
#endif /* USE_HCACHE */
return -1;
}
static char *maildir_canon_filename (char *dest, const char *src, size_t l)
{
char *t, *u;
if ((t = strrchr (src, '/')))
src = t + 1;
strfcpy (dest, src, l);
if ((u = strrchr (dest, ':')))
*u = '\0';
return dest;
}
static void maildir_update_tables (CONTEXT * ctx, int *index_hint)
{
short old_sort;
int old_count;
int i, j;
if (Sort != SORT_ORDER) {
old_sort = Sort;
Sort = SORT_ORDER;
mutt_sort_headers (ctx, 1);
Sort = old_sort;
}
old_count = ctx->msgcount;
for (i = 0, j = 0; i < old_count; i++) {
if (ctx->hdrs[i]->active && index_hint && *index_hint == i)
*index_hint = j;
if (ctx->hdrs[i]->active)
ctx->hdrs[i]->index = j++;
}
mx_update_tables (ctx, 0);
mutt_clear_threads (ctx);
}
static void maildir_update_flags (CONTEXT * ctx, HEADER * o, HEADER * n)
{
/* save the global state here so we can reset it at the
* end of list block if required.
*/
int context_changed = ctx->changed;
/* user didn't modify this message. alter the flags to
* match the current state on disk. This may not actually
* do anything, but we can't tell right now. mutt_set_flag()
* will just ignore the call if the status bits are
* already properly set.
*/
mutt_set_flag (ctx, o, M_FLAG, n->flagged);
mutt_set_flag (ctx, o, M_REPLIED, n->replied);
mutt_set_flag (ctx, o, M_READ, n->read);
mutt_set_flag (ctx, o, M_OLD, n->old);
/* mutt_set_flag() will set this, but we don't need to
* sync the changes we made because we just updated the
* context to match the current on-disk state of the
* message.
*/
o->changed = 0;
/* if the mailbox was not modified before we made these
* changes, unset the changed flag since nothing needs to
* be synchronized.
*/
if (!context_changed)
ctx->changed = 0;
}
/* This function handles arrival of new mail and reopening of
* maildir folders. The basic idea here is we check to see if either
* the new or cur subdirectories have changed, and if so, we scan them
* for the list of files. We check for newly added messages, and
* then merge the flags messages we already knew about. We don't treat
* either subdirectory differently, as mail could be copied directly into
* the cur directory from another agent.
*/
static int maildir_check_mailbox (CONTEXT * ctx, int *index_hint, int unused)
{
struct stat st_new; /* status of the "new" subdirectory */
struct stat st_cur; /* status of the "cur" subdirectory */
char buf[_POSIX_PATH_MAX];
int changed = 0; /* bitmask representing which subdirectories
have changed. 0x1 = new, 0x2 = cur */
int occult = 0; /* messages were removed from the mailbox */
int have_new = 0; /* messages were added to the mailbox */
struct maildir *md; /* list of messages in the mailbox */
struct maildir **last, *p;
int i;
HASH *fnames; /* hash table for quickly looking up the base filename
for a maildir message */
if (!option (OPTCHECKNEW))
return 0;
snprintf (buf, sizeof (buf), "%s/new", ctx->path);
if (stat (buf, &st_new) == -1)
return -1;
snprintf (buf, sizeof (buf), "%s/cur", ctx->path);
if (stat (buf, &st_cur) == -1)
return -1;
/* determine which subdirectories need to be scanned */
if (st_new.st_mtime > ctx->mtime)
changed = 1;
if (st_cur.st_mtime > ctx->mtime_cur)
changed |= 2;
if (!changed)
return 0; /* nothing to do */
/* update the modification times on the mailbox */
ctx->mtime_cur = st_cur.st_mtime;
ctx->mtime = st_new.st_mtime;
/* do a fast scan of just the filenames in
* the subdirectories that have changed.
*/
md = NULL;
last = &md;
if (changed & 1)
maildir_parse_dir (ctx, &last, "new", NULL);
if (changed & 2)
maildir_parse_dir (ctx, &last, "cur", NULL);
/* we create a hash table keyed off the canonical (sans flags) filename
* of each message we scanned. This is used in the loop over the
* existing messages below to do some correlation.
*/
fnames = hash_create (1031);
for (p = md; p; p = p->next) {
maildir_canon_filename (buf, p->h->path, sizeof (buf));
p->canon_fname = str_dup (buf);
hash_insert (fnames, p->canon_fname, p, 0);
}
/* check for modifications and adjust flags */
for (i = 0; i < ctx->msgcount; i++) {
ctx->hdrs[i]->active = 0;
maildir_canon_filename (buf, ctx->hdrs[i]->path, sizeof (buf));
p = hash_find (fnames, buf);
if (p && p->h) {
/* message already exists, merge flags */
ctx->hdrs[i]->active = 1;
/* check to see if the message has moved to a different
* subdirectory. If so, update the associated filename.
*/
if (str_cmp (ctx->hdrs[i]->path, p->h->path))
str_replace (&ctx->hdrs[i]->path, p->h->path);
/* if the user hasn't modified the flags on this message, update
* the flags we just detected.
*/
if (!ctx->hdrs[i]->changed)
maildir_update_flags (ctx, ctx->hdrs[i], p->h);
if (ctx->hdrs[i]->deleted == ctx->hdrs[i]->trash)
ctx->hdrs[i]->deleted = p->h->deleted;
ctx->hdrs[i]->trash = p->h->trash;
/* this is a duplicate of an existing header, so remove it */
mutt_free_header (&p->h);
}
/* This message was not in the list of messages we just scanned.
* Check to see if we have enough information to know if the
* message has disappeared out from underneath us.
*/
else if (((changed & 1) && (!strncmp (ctx->hdrs[i]->path, "new/", 4))) ||
((changed & 2) && (!strncmp (ctx->hdrs[i]->path, "cur/", 4)))) {
/* This message disappeared, so we need to simulate a "reopen"
* event. We know it disappeared because we just scanned the
* subdirectory it used to reside in.
*/
occult = 1;
}
else {
/* This message resides in a subdirectory which was not
* modified, so we assume that it is still present and
* unchanged.
*/
ctx->hdrs[i]->active = 1;
}
}
/* destroy the file name hash */
hash_destroy (&fnames, NULL);
/* If we didn't just get new mail, update the tables. */
if (occult)
maildir_update_tables (ctx, index_hint);
/* do any delayed parsing we need to do. */
maildir_delayed_parsing (ctx, md);
/* Incorporate new messages */
have_new = maildir_move_to_context (ctx, &md);
return occult ? M_REOPENED : (have_new ? M_NEW_MAIL : 0);
}
/*
* This function handles arrival of new mail and reopening of
* mh/maildir folders. Things are getting rather complex because we
* don't have a well-defined "mailbox order", so the tricks from
* mbox.c and mx.c won't work here.
*
* Don't change this code unless you _really_ understand what
* happens.
*
*/
static int mh_check_mailbox (CONTEXT * ctx, int *index_hint, int unused)
{
char buf[_POSIX_PATH_MAX];
struct stat st, st_cur;
short modified = 0, have_new = 0, occult = 0;
struct maildir *md, *p;
struct maildir **last = NULL;
struct mh_sequences mhs;
HASH *fnames;
int i;
if (!option (OPTCHECKNEW))
return 0;
strfcpy (buf, ctx->path, sizeof (buf));
if (stat (buf, &st) == -1)
return -1;
/* create .mh_sequences when there isn't one. */
snprintf (buf, sizeof (buf), "%s/.mh_sequences", ctx->path);
if ((i = stat (buf, &st_cur) == -1) && errno == ENOENT) {
char *tmp;
FILE *fp = NULL;
if (mh_mkstemp (ctx, &fp, &tmp) == 0) {
safe_fclose (&fp);
if (safe_rename (tmp, buf) == -1)
unlink (tmp);
mem_free (&tmp);
}
}
if (i == -1 && stat (buf, &st_cur) == -1)
modified = 1;
if (st.st_mtime > ctx->mtime || st_cur.st_mtime > ctx->mtime_cur)
modified = 1;
if (!modified)
return 0;
ctx->mtime_cur = st_cur.st_mtime;
ctx->mtime = st.st_mtime;
memset (&mhs, 0, sizeof (mhs));
md = NULL;
last = &md;
maildir_parse_dir (ctx, &last, NULL, NULL);
mh_read_sequences (&mhs, ctx->path);
mh_update_maildir (md, &mhs);
mhs_free_sequences (&mhs);
/* check for modifications and adjust flags */
fnames = hash_create (1031);
for (p = md; p; p = p->next)
hash_insert (fnames, p->h->path, p, 0);
for (i = 0; i < ctx->msgcount; i++) {
ctx->hdrs[i]->active = 0;
if ((p = hash_find (fnames, ctx->hdrs[i]->path)) && p->h &&
(mutt_cmp_header (ctx->hdrs[i], p->h))) {
ctx->hdrs[i]->active = 1;
/* found the right message */
if (!ctx->hdrs[i]->changed)
maildir_update_flags (ctx, ctx->hdrs[i], p->h);
mutt_free_header (&p->h);
}
else /* message has disappeared */
occult = 1;
}
/* destroy the file name hash */
hash_destroy (&fnames, NULL);
/* If we didn't just get new mail, update the tables. */
if (occult)
maildir_update_tables (ctx, index_hint);
/* Incorporate new messages */
have_new = maildir_move_to_context (ctx, &md);
return occult ? M_REOPENED : (have_new ? M_NEW_MAIL : 0);
}
/*
* These functions try to find a message in a maildir folder when it
* has moved under our feet. Note that this code is rather expensive, but
* then again, it's called rarely.
*/
FILE *_maildir_open_find_message (const char *folder, const char *unique,
const char *subfolder)
{
char dir[_POSIX_PATH_MAX];
char tunique[_POSIX_PATH_MAX];
char fname[_POSIX_PATH_MAX];
DIR *dp;
struct dirent *de;
FILE *fp = NULL;
int oe = ENOENT;
snprintf (dir, sizeof (dir), "%s/%s", folder, subfolder);
if ((dp = opendir (dir)) == NULL) {
errno = ENOENT;
return NULL;
}
while ((de = readdir (dp))) {
maildir_canon_filename (tunique, de->d_name, sizeof (tunique));
if (!str_cmp (tunique, unique)) {
snprintf (fname, sizeof (fname), "%s/%s/%s", folder, subfolder,
de->d_name);
fp = fopen (fname, "r"); /* __FOPEN_CHECKED__ */
oe = errno;
break;
}
}
closedir (dp);
errno = oe;
return fp;
}
FILE *maildir_open_find_message (const char *folder, const char *msg)
{
char unique[_POSIX_PATH_MAX];
FILE *fp;
static unsigned int new_hits = 0, cur_hits = 0; /* simple dynamic optimization */
maildir_canon_filename (unique, msg, sizeof (unique));
if ((fp =
_maildir_open_find_message (folder, unique,
new_hits > cur_hits ? "new" : "cur"))
|| errno != ENOENT) {
if (new_hits < UINT_MAX && cur_hits < UINT_MAX) {
new_hits += (new_hits > cur_hits ? 1 : 0);
cur_hits += (new_hits > cur_hits ? 0 : 1);
}
return fp;
}
if ((fp =
_maildir_open_find_message (folder, unique,
new_hits > cur_hits ? "cur" : "new"))
|| errno != ENOENT) {
if (new_hits < UINT_MAX && cur_hits < UINT_MAX) {
new_hits += (new_hits > cur_hits ? 0 : 1);
cur_hits += (new_hits > cur_hits ? 1 : 0);
}
return fp;
}
return NULL;
}
/*
* Returns:
* 1 if there are no messages in the mailbox
* 0 if there are messages in the mailbox
* -1 on error
*/
static int maildir_check_empty (const char *path)
{
DIR *dp;
struct dirent *de;
int r = 1; /* assume empty until we find a message */
char realpath[_POSIX_PATH_MAX];
int iter = 0;
/* Strategy here is to look for any file not beginning with a period */
do {
/* we do "cur" on the first iteration since its more likely that we'll
* find old messages without having to scan both subdirs
*/
snprintf (realpath, sizeof (realpath), "%s/%s", path,
iter == 0 ? "cur" : "new");
if ((dp = opendir (realpath)) == NULL)
return -1;
while ((de = readdir (dp))) {
if (*de->d_name != '.') {
r = 0;
break;
}
}
closedir (dp);
iter++;
} while (r && iter < 2);
return r;
}
/*
* Returns:
* 1 if there are no messages in the mailbox
* 0 if there are messages in the mailbox
* -1 on error
*/
int mh_check_empty (const char *path)
{
DIR *dp;
struct dirent *de;
int r = 1; /* assume empty until we find a message */
if ((dp = opendir (path)) == NULL)
return -1;
while ((de = readdir (dp))) {
if (mh_valid_message (de->d_name)) {
r = 0;
break;
}
}
closedir (dp);
return r;
}
static int mh_is_magic (const char* path, struct stat* st) {
char tmp[_POSIX_PATH_MAX];
if (S_ISDIR (st->st_mode)) {
snprintf (tmp, sizeof (tmp), "%s/.mh_sequences", path);
if (access (tmp, F_OK) == 0)
return (M_MH);
snprintf (tmp, sizeof (tmp), "%s/.xmhcache", path);
if (access (tmp, F_OK) == 0)
return (M_MH);
snprintf (tmp, sizeof (tmp), "%s/.mew_cache", path);
if (access (tmp, F_OK) == 0)
return (M_MH);
snprintf (tmp, sizeof (tmp), "%s/.mew-cache", path);
if (access (tmp, F_OK) == 0)
return (M_MH);
snprintf (tmp, sizeof (tmp), "%s/.sylpheed_cache", path);
if (access (tmp, F_OK) == 0)
return (M_MH);
/*
* ok, this isn't an mh folder, but mh mode can be used to read
* Usenet news from the spool. ;-)
*/
snprintf (tmp, sizeof (tmp), "%s/.overview", path);
if (access (tmp, F_OK) == 0)
return (M_MH);
}
return (-1);
}
static int maildir_is_magic (const char* path, struct stat* st) {
struct stat sb;
char tmp[_POSIX_PATH_MAX];
if (S_ISDIR (st->st_mode)) {
snprintf (tmp, sizeof (tmp), "%s/cur", path);
if (stat (tmp, &sb) == 0 && S_ISDIR (sb.st_mode))
return (M_MAILDIR);
}
return (-1);
}
/* routines common to maildir and mh */
static mx_t* reg_mx (void) {
mx_t* fmt = mem_calloc (1, sizeof (mx_t));
fmt->local = 1;
fmt->mx_access = access;
fmt->mx_sync_mailbox = mh_sync_mailbox;
return (fmt);
}
static int mh_commit (MESSAGE* msg, CONTEXT* ctx) {
return (mh_commit_message (msg, ctx, NULL));
}
static int maildir_commit (MESSAGE* msg, CONTEXT* ctx) {
return (maildir_commit_message (msg, ctx, NULL));
}
mx_t* mh_reg_mx (void) {
mx_t* fmt = reg_mx ();
fmt->type = M_MH;
fmt->mx_check_empty = mh_check_empty;
fmt->mx_is_magic = mh_is_magic;
fmt->mx_open_mailbox = mh_read_dir;
fmt->mx_open_new_message = mh_open_new_message;
fmt->mx_check_mailbox = mh_check_mailbox;
fmt->mx_commit_message = mh_commit;
return (fmt);
}
mx_t* maildir_reg_mx (void) {
mx_t* fmt = reg_mx ();
fmt->type = M_MAILDIR;
fmt->mx_check_empty = maildir_check_empty;
fmt->mx_is_magic = maildir_is_magic;
fmt->mx_open_mailbox = maildir_read_dir;
fmt->mx_open_new_message = maildir_open_new_message;
fmt->mx_check_mailbox = maildir_check_mailbox;
fmt->mx_commit_message = maildir_commit;
return (fmt);
}
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