X-Git-Url: http://git.madism.org/?p=apps%2Fmadmutt.git;a=blobdiff_plain;f=mh.c;h=ca138834457a157c745e85a9f8574d65a1e38d0f;hp=e695a93566e83b16b79a533cfa009ea79533c52d;hb=529bd38e97bf5b597a7e8149293b63c6fb82984e;hpb=0f44dc85fc1280372ffab911d701e703d803fb4b

diff --git a/mh.c b/mh.c
index e695a93..ca13883 100644
--- a/mh.c
+++ b/mh.c
@@ -18,15 +18,19 @@
 #endif
 
 #include "mutt.h"
-#include "mailbox.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>
@@ -67,6 +71,11 @@ struct mh_sequences {
 #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;
@@ -74,7 +83,7 @@ static void mhs_alloc (struct mh_sequences *mhs, int i)
 
   if (i > mhs->max || !mhs->flags) {
     newmax = i + 128;
-    safe_realloc (&mhs->flags, sizeof (mhs->flags[0]) * (newmax + 1));
+    mem_realloc (&mhs->flags, sizeof (mhs->flags[0]) * (newmax + 1));
     for (j = mhs->max + 1; j <= newmax; j++)
       mhs->flags[j] = 0;
 
@@ -84,7 +93,7 @@ static void mhs_alloc (struct mh_sequences *mhs, int i)
 
 static void mhs_free_sequences (struct mh_sequences *mhs)
 {
-  FREE (&mhs->flags);
+  mem_free (&mhs->flags);
 }
 
 static short mhs_check (struct mh_sequences *mhs, int i)
@@ -150,11 +159,11 @@ static void mh_read_sequences (struct mh_sequences *mhs, const char *path)
     if (!(t = strtok (buff, " \t:")))
       continue;
 
-    if (!safe_strcmp (t, MhUnseen))
+    if (!str_cmp (t, MhUnseen))
       f = MH_SEQ_UNSEEN;
-    else if (!safe_strcmp (t, MhFlagged))
+    else if (!str_cmp (t, MhFlagged))
       f = MH_SEQ_FLAGGED;
-    else if (!safe_strcmp (t, MhReplied))
+    else if (!str_cmp (t, MhReplied))
       f = MH_SEQ_REPLIED;
     else                        /* unknown sequence */
       continue;
@@ -166,7 +175,7 @@ static void mh_read_sequences (struct mh_sequences *mhs, const char *path)
     }
   }
 
-  FREE (&buff);
+  mem_free (&buff);
   safe_fclose (&fp);
 }
 
@@ -201,13 +210,13 @@ static int mh_mkstemp (CONTEXT * dest, FILE ** fp, char **tgt)
       }
     }
     else {
-      *tgt = safe_strdup (path);
+      *tgt = str_dup (path);
       break;
     }
   }
 
   if ((*fp = fdopen (fd, "w")) == NULL) {
-    FREE (tgt);
+    mem_free (tgt);
     close (fd);
     unlink (path);
     return (-1);
@@ -297,11 +306,11 @@ void mh_update_sequences (CONTEXT * ctx)
   /* first, copy unknown sequences */
   if ((ofp = fopen (sequences, "r"))) {
     while ((buff = mutt_read_line (buff, &s, ofp, &l))) {
-      if (!safe_strncmp (buff, seq_unseen, safe_strlen (seq_unseen)))
+      if (!str_ncmp (buff, seq_unseen, str_len (seq_unseen)))
         continue;
-      if (!safe_strncmp (buff, seq_flagged, safe_strlen (seq_flagged)))
+      if (!str_ncmp (buff, seq_flagged, str_len (seq_flagged)))
         continue;
-      if (!safe_strncmp (buff, seq_replied, safe_strlen (seq_replied)))
+      if (!str_ncmp (buff, seq_replied, str_len (seq_replied)))
         continue;
 
       fprintf (nfp, "%s\n", buff);
@@ -355,7 +364,7 @@ void mh_update_sequences (CONTEXT * ctx)
     unlink (tmpfname);
   }
 
-  FREE (&tmpfname);
+  mem_free (&tmpfname);
 }
 
 static void mh_sequences_add_one (CONTEXT * ctx, int n, short unseen,
@@ -388,17 +397,17 @@ static void mh_sequences_add_one (CONTEXT * ctx, int n, short unseen,
   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, safe_strlen (seq_unseen))) {
+      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, safe_strlen (seq_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, safe_strlen (seq_replied))) {
+               && !strncmp (buff, seq_replied, str_len (seq_replied))) {
         fprintf (nfp, "%s %d\n", buff, n);
         replied_done = 1;
       }
@@ -407,7 +416,7 @@ static void mh_sequences_add_one (CONTEXT * ctx, int n, short unseen,
     }
   }
   safe_fclose (&ofp);
-  FREE (&buff);
+  mem_free (&buff);
 
   if (!unseen_done && unseen)
     fprintf (nfp, "%s: %d\n", NONULL (MhUnseen), n);
@@ -422,7 +431,7 @@ static void mh_sequences_add_one (CONTEXT * ctx, int n, short unseen,
   if (safe_rename (tmpfname, sequences) != 0)
     unlink (tmpfname);
 
-  FREE (&tmpfname);
+  mem_free (&tmpfname);
 }
 
 static void mh_update_maildir (struct maildir *md, struct mh_sequences *mhs)
@@ -453,11 +462,11 @@ static void maildir_free_entry (struct maildir **md)
   if (!md || !*md)
     return;
 
-  FREE (&(*md)->canon_fname);
+  mem_free (&(*md)->canon_fname);
   if ((*md)->h)
     mutt_free_header (&(*md)->h);
 
-  FREE (md);
+  mem_free (md);
 }
 
 static void maildir_free_maildir (struct maildir **md)
@@ -481,7 +490,7 @@ static void maildir_parse_flags (HEADER * h, const char *path)
   h->read = 0;
   h->replied = 0;
 
-  if ((p = strrchr (path, ':')) != NULL && safe_strncmp (p + 1, "2,", 2) == 0) {
+  if ((p = strrchr (path, ':')) != NULL && str_ncmp (p + 1, "2,", 2) == 0) {
     p += 3;
 
     str_replace (&h->maildir_flags, p);
@@ -518,7 +527,7 @@ static void maildir_parse_flags (HEADER * h, const char *path)
   }
 
   if (q == h->maildir_flags)
-    FREE (&h->maildir_flags);
+    mem_free (&h->maildir_flags);
   else if (q)
     *q = '\0';
 }
@@ -630,12 +639,12 @@ static int maildir_parse_entry (CONTEXT * ctx, struct maildir ***last,
 
     if (subdir) {
       snprintf (buf, sizeof (buf), "%s/%s", subdir, fname);
-      h->path = safe_strdup (buf);
+      h->path = str_dup (buf);
     }
     else
-      h->path = safe_strdup (fname);
+      h->path = str_dup (fname);
 
-    entry = safe_calloc (sizeof (struct maildir), 1);
+    entry = mem_calloc (sizeof (struct maildir), 1);
     entry->h = h;
     entry->header_parsed = (ctx->magic == M_MH);
 #ifdef USE_INODESORT
@@ -676,7 +685,7 @@ static int maildir_parse_dir (CONTEXT * ctx, struct maildir ***last,
 
   if (subdir) {
     snprintf (buf, sizeof (buf), "%s/%s", ctx->path, subdir);
-    is_old = (safe_strcmp ("cur", subdir) == 0);
+    is_old = (str_cmp ("cur", subdir) == 0);
   }
   else
     strfcpy (buf, ctx->path, sizeof (buf));
@@ -692,9 +701,7 @@ static int maildir_parse_dir (CONTEXT * ctx, struct maildir ***last,
 
     /* FOO - really ignore the return value? */
 
-    dprint (2,
-            (debugfile, "%s:%d: parsing %s\n", __FILE__, __LINE__,
-             de->d_name));
+    debug_print (2, ("parsing %s\n", de->d_name));
     maildir_parse_entry (ctx, last, subdir, de->d_name, count, is_old,
                          de->d_ino);
   }
@@ -709,16 +716,12 @@ static int maildir_add_to_context (CONTEXT * ctx, struct maildir *md)
 
   while (md) {
 
-    dprint (2, (debugfile, "%s:%d maildir_add_to_context(): Considering %s\n",
-                __FILE__, __LINE__, NONULL (md->canon_fname)));
+    debug_print (2, ("considering %s\n", NONULL (md->canon_fname)));
 
     if (md->h) {
-      dprint (2,
-              (debugfile,
-               "%s:%d Adding header structure. Flags: %s%s%s%s%s\n", __FILE__,
-               __LINE__, md->h->flagged ? "f" : "", md->h->deleted ? "D" : "",
-               md->h->replied ? "r" : "", md->h->old ? "O" : "",
-               md->h->read ? "R" : ""));
+      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);
 
@@ -834,7 +837,7 @@ static size_t maildir_hcache_keylen (const char *fn)
 {
   const char *p = strchr (fn, ':');
 
-  return p ? (size_t) (p - fn) : safe_strlen (fn);
+  return p ? (size_t) (p - fn) : str_len (fn);
 }
 #endif
 
@@ -896,7 +899,7 @@ void maildir_delayed_parsing (CONTEXT * ctx, struct maildir *md)
     else
       mutt_free_header (&p->h);
 #if USE_HCACHE
-    FREE (&data);
+    mem_free (&data);
 #endif
   }
 #if USE_HCACHE
@@ -911,7 +914,7 @@ void maildir_delayed_parsing (CONTEXT * ctx, struct maildir *md)
  *	subdir [IN]	NULL for MH mailboxes, otherwise the subdir of the
  *			maildir mailbox to read from
  */
-int mh_read_dir (CONTEXT * ctx, const char *subdir)
+static int _mh_read_dir (CONTEXT * ctx, const char *subdir)
 {
   struct maildir *md;
   struct mh_sequences mhs;
@@ -946,13 +949,17 @@ int mh_read_dir (CONTEXT * ctx, const char *subdir)
   return 0;
 }
 
+static int mh_read_dir (CONTEXT* ctx) {
+  return (_mh_read_dir (ctx, NULL));
+}
+
 /* read a maildir style mailbox */
-int maildir_read_dir (CONTEXT * ctx)
+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)
+  if (_mh_read_dir (ctx, "new") == -1 || _mh_read_dir (ctx, "cur") == -1)
     return (-1);
 
   return 0;
@@ -962,7 +969,7 @@ int maildir_read_dir (CONTEXT * ctx)
  * Open a new (temporary) message in an MH folder.
  */
 
-int mh_open_new_message (MESSAGE * msg, CONTEXT * dest, HEADER * hdr)
+static int mh_open_new_message (MESSAGE * msg, CONTEXT * dest, HEADER * hdr)
 {
   return mh_mkstemp (dest, &msg->fp, &msg->path);
 }
@@ -996,7 +1003,7 @@ static void maildir_flags (char *dest, size_t destlen, HEADER * hdr)
               hdr->read ? "S" : "", hdr->deleted ? "T" : "",
               NONULL (hdr->maildir_flags));
     if (hdr->maildir_flags)
-      qsort (tmp, safe_strlen (tmp), 1, ch_compar);
+      qsort (tmp, str_len (tmp), 1, ch_compar);
     snprintf (dest, destlen, ":2,%s", tmp);
   }
 }
@@ -1010,7 +1017,7 @@ static void maildir_flags (char *dest, size_t destlen, HEADER * hdr)
  *
  */
 
-int maildir_open_new_message (MESSAGE * msg, CONTEXT * dest, HEADER * hdr)
+static int maildir_open_new_message (MESSAGE * msg, CONTEXT * dest, HEADER * hdr)
 {
   int fd;
   char path[_POSIX_PATH_MAX];
@@ -1039,8 +1046,7 @@ int maildir_open_new_message (MESSAGE * msg, CONTEXT * dest, HEADER * hdr)
               dest->path, subdir, (long) time (NULL),
               (unsigned int) getpid (), Counter++, NONULL (Hostname), suffix);
 
-    dprint (2, (debugfile, "maildir_open_new_message (): Trying %s.\n",
-                path));
+    debug_print (2, ("trying %s.\n", path));
 
     umask (Umask);
     if ((fd = open (path, O_WRONLY | O_EXCL | O_CREAT, 0666)) == -1) {
@@ -1050,14 +1056,14 @@ int maildir_open_new_message (MESSAGE * msg, CONTEXT * dest, HEADER * hdr)
       }
     }
     else {
-      dprint (2, (debugfile, "maildir_open_new_message (): Success.\n"));
-      msg->path = safe_strdup (path);
+      debug_print (2, ("success.\n"));
+      msg->path = str_dup (path);
       break;
     }
   }
 
   if ((msg->fp = fdopen (fd, "w")) == NULL) {
-    FREE (&msg->path);
+    mem_free (&msg->path);
     close (fd);
     unlink (path);
     return (-1);
@@ -1089,7 +1095,7 @@ int maildir_open_new_message (MESSAGE * msg, CONTEXT * dest, HEADER * hdr)
  * 
  */
 
-int maildir_commit_message (CONTEXT * ctx, MESSAGE * msg, HEADER * hdr)
+static int maildir_commit_message (MESSAGE * msg, CONTEXT * ctx, HEADER * hdr)
 {
   char subdir[4];
   char suffix[16];
@@ -1117,13 +1123,12 @@ int maildir_commit_message (CONTEXT * ctx, MESSAGE * msg, HEADER * hdr)
               NONULL (Hostname), suffix);
     snprintf (full, _POSIX_PATH_MAX, "%s/%s", ctx->path, path);
 
-    dprint (2, (debugfile, "maildir_commit_message (): renaming %s to %s.\n",
-                msg->path, full));
+    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);
-      FREE (&msg->path);
+      mem_free (&msg->path);
 
       /*
        * Adjust the mtime on the file to match the time at which this
@@ -1158,7 +1163,7 @@ int maildir_commit_message (CONTEXT * ctx, MESSAGE * msg, HEADER * hdr)
  */
 
 
-static int _mh_commit_message (CONTEXT * ctx, MESSAGE * msg, HEADER * hdr,
+static int _mh_commit_message (MESSAGE * msg, CONTEXT * ctx, HEADER * hdr,
                                short updseq)
 {
   DIR *dirp;
@@ -1209,7 +1214,7 @@ static int _mh_commit_message (CONTEXT * ctx, MESSAGE * msg, HEADER * hdr,
     if (safe_rename (msg->path, path) == 0) {
       if (hdr)
         str_replace (&hdr->path, tmp);
-      FREE (&msg->path);
+      mem_free (&msg->path);
       break;
     }
     else if (errno != EEXIST) {
@@ -1223,12 +1228,10 @@ static int _mh_commit_message (CONTEXT * ctx, MESSAGE * msg, HEADER * hdr,
   return 0;
 }
 
-int mh_commit_message (CONTEXT * ctx, MESSAGE * msg, HEADER * hdr)
-{
-  return _mh_commit_message (ctx, msg, hdr, 1);
+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
@@ -1260,9 +1263,9 @@ static int mh_rewrite_message (CONTEXT * ctx, int msgno)
     strfcpy (partpath, h->path, _POSIX_PATH_MAX);
 
     if (ctx->magic == M_MAILDIR)
-      rc = maildir_commit_message (ctx, dest, h);
+      rc = maildir_commit_message (dest, ctx, h);
     else
-      rc = _mh_commit_message (ctx, dest, h, 0);
+      rc = _mh_commit_message (dest, ctx, h, 0);
 
     mx_close_message (&dest);
 
@@ -1309,7 +1312,8 @@ static int mh_sync_message (CONTEXT * ctx, int msgno)
 {
   HEADER *h = ctx->hdrs[msgno];
 
-  if (h->attach_del || h->refs_changed || h->irt_changed)
+  if (h->attach_del || 
+      (h->env && (h->env->refs_changed || h->env->irt_changed)))
     if (mh_rewrite_message (ctx, msgno) != 0)
       return -1;
 
@@ -1320,7 +1324,8 @@ static int maildir_sync_message (CONTEXT * ctx, int msgno)
 {
   HEADER *h = ctx->hdrs[msgno];
 
-  if (h->attach_del || h->refs_changed || h->irt_changed) {
+  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);
@@ -1336,10 +1341,7 @@ static int maildir_sync_message (CONTEXT * ctx, int msgno)
     char *p;
 
     if ((p = strrchr (h->path, '/')) == NULL) {
-      dprint (1,
-              (debugfile,
-               "maildir_sync_message: %s: unable to find subdir!\n",
-               h->path));
+      debug_print (1, ("%s: unable to find subdir!\n", h->path));
       return (-1);
     }
     p++;
@@ -1356,7 +1358,7 @@ static int maildir_sync_message (CONTEXT * ctx, int msgno)
     snprintf (fullpath, sizeof (fullpath), "%s/%s", ctx->path, partpath);
     snprintf (oldpath, sizeof (oldpath), "%s/%s", ctx->path, h->path);
 
-    if (safe_strcmp (fullpath, oldpath) == 0) {
+    if (str_cmp (fullpath, oldpath) == 0) {
       /* message hasn't really changed */
       return 0;
     }
@@ -1373,7 +1375,7 @@ static int maildir_sync_message (CONTEXT * ctx, int msgno)
   return (0);
 }
 
-int mh_sync_mailbox (CONTEXT * ctx, int *index_hint)
+static int mh_sync_mailbox (CONTEXT * ctx, int unused, int *index_hint)
 {
   char path[_POSIX_PATH_MAX], tmp[_POSIX_PATH_MAX];
   int i, j;
@@ -1383,9 +1385,9 @@ int mh_sync_mailbox (CONTEXT * ctx, int *index_hint)
 #endif /* USE_HCACHE */
 
   if (ctx->magic == M_MH)
-    i = mh_check_mailbox (ctx, index_hint);
+    i = mh_check_mailbox (ctx, index_hint, 0);
   else
-    i = maildir_check_mailbox (ctx, index_hint);
+    i = maildir_check_mailbox (ctx, index_hint, 0);
 
   if (i != 0)
     return i;
@@ -1548,7 +1550,7 @@ static void maildir_update_flags (CONTEXT * ctx, HEADER * o, HEADER * n)
  * either subdirectory differently, as mail could be copied directly into
  * the cur directory from another agent.
  */
-int maildir_check_mailbox (CONTEXT * ctx, int *index_hint)
+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 */
@@ -1563,9 +1565,6 @@ int maildir_check_mailbox (CONTEXT * ctx, int *index_hint)
   HASH *fnames;                 /* hash table for quickly looking up the base filename
                                    for a maildir message */
 
-  /* XXX seems like this check belongs in mx_check_mailbox()
-   * rather than here.
-   */
   if (!option (OPTCHECKNEW))
     return 0;
 
@@ -1608,7 +1607,7 @@ int maildir_check_mailbox (CONTEXT * ctx, int *index_hint)
 
   for (p = md; p; p = p->next) {
     maildir_canon_filename (buf, p->h->path, sizeof (buf));
-    p->canon_fname = safe_strdup (buf);
+    p->canon_fname = str_dup (buf);
     hash_insert (fnames, p->canon_fname, p, 0);
   }
 
@@ -1624,7 +1623,7 @@ int maildir_check_mailbox (CONTEXT * ctx, int *index_hint)
       /* check to see if the message has moved to a different
        * subdirectory.  If so, update the associated filename.
        */
-      if (safe_strcmp (ctx->hdrs[i]->path, p->h->path))
+      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
@@ -1688,7 +1687,7 @@ int maildir_check_mailbox (CONTEXT * ctx, int *index_hint)
  *
  */
 
-int mh_check_mailbox (CONTEXT * ctx, int *index_hint)
+static int mh_check_mailbox (CONTEXT * ctx, int *index_hint, int unused)
 {
   char buf[_POSIX_PATH_MAX];
   struct stat st, st_cur;
@@ -1716,7 +1715,7 @@ int mh_check_mailbox (CONTEXT * ctx, int *index_hint)
       safe_fclose (&fp);
       if (safe_rename (tmp, buf) == -1)
         unlink (tmp);
-      FREE (&tmp);
+      mem_free (&tmp);
     }
   }
 
@@ -1751,7 +1750,7 @@ int mh_check_mailbox (CONTEXT * ctx, int *index_hint)
     ctx->hdrs[i]->active = 0;
 
     if ((p = hash_find (fnames, ctx->hdrs[i]->path)) && p->h &&
-        (mbox_strict_cmp_headers (ctx->hdrs[i], p->h))) {
+        (mutt_cmp_header (ctx->hdrs[i], p->h))) {
       ctx->hdrs[i]->active = 1;
       /* found the right message */
       if (!ctx->hdrs[i]->changed)
@@ -1809,7 +1808,7 @@ FILE *_maildir_open_find_message (const char *folder, const char *unique,
   while ((de = readdir (dp))) {
     maildir_canon_filename (tunique, de->d_name, sizeof (tunique));
 
-    if (!safe_strcmp (tunique, unique)) {
+    if (!str_cmp (tunique, unique)) {
       snprintf (fname, sizeof (fname), "%s/%s/%s", folder, subfolder,
                 de->d_name);
       fp = fopen (fname, "r");  /* __FOPEN_CHECKED__ */
@@ -1866,7 +1865,7 @@ FILE *maildir_open_find_message (const char *folder, const char *msg)
  * 0 if there are messages in the mailbox
  * -1 on error
  */
-int maildir_check_empty (const char *path)
+static int maildir_check_empty (const char *path)
 {
   DIR *dp;
   struct dirent *de;
@@ -1921,3 +1920,92 @@ int mh_check_empty (const char *path)
 
   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);
+}