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mh.c
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mh.c
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/**
* @file
* Maildir/MH local mailbox type
*
* @authors
* Copyright (C) 1996-2002,2007,2009 Michael R. Elkins <[email protected]>
* Copyright (C) 1999-2005 Thomas Roessler <[email protected]>
* Copyright (C) 2010,2013 Michael R. Elkins <[email protected]>
*
* @copyright
* This program is free software: you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation, either version 2 of the License, or (at your option) any later
* version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* This file contains routines specific to MH and ``maildir'' style
* mailboxes.
*/
#include "config.h"
#include <ctype.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <limits.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <time.h>
#include <unistd.h>
#include <utime.h>
#include "mutt.h"
#include "body.h"
#include "buffy.h"
#include "context.h"
#include "copy.h"
#include "envelope.h"
#include "globals.h"
#include "header.h"
#include "lib/lib.h"
#include "mailbox.h"
#include "mutt_curses.h"
#include "mx.h"
#include "options.h"
#include "protos.h"
#include "sort.h"
#include "thread.h"
#ifdef USE_NOTMUCH
#include "mutt_notmuch.h"
#endif
#ifdef USE_HCACHE
#include "hcache/hcache.h"
#endif
#define INS_SORT_THRESHOLD 6
/**
* struct Maildir - A Maildir mailbox
*/
struct Maildir
{
struct Header *h;
char *canon_fname;
unsigned header_parsed : 1;
ino_t inode;
struct Maildir *next;
};
/**
* struct MhSequences - Set of MH sequence numbers
*/
struct MhSequences
{
int max;
short *flags;
};
/**
* struct MhData - MH-specific mailbox data
*/
struct MhData
{
time_t mtime_cur;
mode_t mh_umask;
};
/* mh_sequences support */
#define MH_SEQ_UNSEEN (1 << 0)
#define MH_SEQ_REPLIED (1 << 1)
#define MH_SEQ_FLAGGED (1 << 2)
static inline struct MhData *mh_data(struct Context *ctx)
{
return (struct MhData *) ctx->data;
}
static void mhs_alloc(struct MhSequences *mhs, int i)
{
int j;
int newmax;
if (i > mhs->max || !mhs->flags)
{
newmax = i + 128;
j = mhs->flags ? mhs->max + 1 : 0;
safe_realloc(&mhs->flags, sizeof(mhs->flags[0]) * (newmax + 1));
while (j <= newmax)
mhs->flags[j++] = 0;
mhs->max = newmax;
}
}
static void mhs_free_sequences(struct MhSequences *mhs)
{
FREE(&mhs->flags);
}
static short mhs_check(struct MhSequences *mhs, int i)
{
if (!mhs->flags || i > mhs->max)
return 0;
else
return mhs->flags[i];
}
static short mhs_set(struct MhSequences *mhs, int i, short f)
{
mhs_alloc(mhs, i);
mhs->flags[i] |= f;
return mhs->flags[i];
}
static int mh_read_token(char *t, int *first, int *last)
{
char *p = NULL;
if ((p = strchr(t, '-')))
{
*p++ = '\0';
if (mutt_atoi(t, first) < 0 || mutt_atoi(p, last) < 0)
return -1;
}
else
{
if (mutt_atoi(t, first) < 0)
return -1;
*last = *first;
}
return 0;
}
static int mh_read_sequences(struct MhSequences *mhs, const char *path)
{
FILE *fp = NULL;
int line = 1;
char *buff = NULL;
char *t = NULL;
size_t sz = 0;
short f;
int first, last, rc = 0;
char pathname[_POSIX_PATH_MAX];
snprintf(pathname, sizeof(pathname), "%s/.mh_sequences", path);
if (!(fp = fopen(pathname, "r")))
return 0; /* yes, ask callers to silently ignore the error */
while ((buff = mutt_read_line(buff, &sz, fp, &line, 0)))
{
if (!(t = strtok(buff, " \t:")))
continue;
if (mutt_strcmp(t, MhUnseen) == 0)
f = MH_SEQ_UNSEEN;
else if (mutt_strcmp(t, MhFlagged) == 0)
f = MH_SEQ_FLAGGED;
else if (mutt_strcmp(t, MhReplied) == 0)
f = MH_SEQ_REPLIED;
else /* unknown sequence */
continue;
while ((t = strtok(NULL, " \t:")))
{
if (mh_read_token(t, &first, &last) < 0)
{
mhs_free_sequences(mhs);
rc = -1;
goto out;
}
for (; first <= last; first++)
mhs_set(mhs, first, f);
}
}
rc = 0;
out:
FREE(&buff);
safe_fclose(&fp);
return rc;
}
static inline mode_t mh_umask(struct Context *ctx)
{
struct stat st;
struct MhData *data = mh_data(ctx);
if (data && data->mh_umask)
return data->mh_umask;
if (stat(ctx->path, &st))
{
mutt_debug(1, "stat failed on %s\n", ctx->path);
return 077;
}
return 0777 & ~st.st_mode;
}
/**
* mh_sequences_changed - Has the mailbox changed
* @param b Mailbox
* @retval 1 mh_sequences last modification time is more recent than the last visit to this mailbox
* @retval 0 modification time is older
* @retval -1 Error
*/
static int mh_sequences_changed(struct Buffy *b)
{
char path[_POSIX_PATH_MAX];
struct stat sb;
if ((snprintf(path, sizeof(path), "%s/.mh_sequences", b->path) < sizeof(path)) &&
(stat(path, &sb) == 0))
return (sb.st_mtime > b->last_visited);
return -1;
}
/**
* mh_already_notified - Has the message changed
* @param b Mailbox
* @param msgno Message number
* @retval 1 Modification time on the message file is older than the last visit to this mailbox
* @retval 0 Modification time on the message file is newer
* @retval -1 Error
*/
static int mh_already_notified(struct Buffy *b, int msgno)
{
char path[_POSIX_PATH_MAX];
struct stat sb;
if ((snprintf(path, sizeof(path), "%s/%d", b->path, msgno) < sizeof(path)) &&
(stat(path, &sb) == 0))
return (sb.st_mtime <= b->last_visited);
return -1;
}
/**
* mh_valid_message - Is this a valid MH message filename
* @param s Pathname to examine
* @retval true name is valid
* @retval false name is invalid
*
* Ignore the garbage files. A valid MH message consists of only
* digits. Deleted message get moved to a filename with a comma before
* it.
*/
static bool mh_valid_message(const char *s)
{
for (; *s; s++)
{
if (!isdigit((unsigned char) *s))
return false;
}
return true;
}
/**
* mh_buffy - Check for new mail for a mh mailbox
* @param mailbox Mailbox to check
* @param check_stats Also count total, new, and flagged messages
* @retval true if the mailbox has new mail
*/
int mh_buffy(struct Buffy *mailbox, int check_stats)
{
struct MhSequences mhs;
int check_new = 1;
int rc = 0;
DIR *dirp = NULL;
struct dirent *de = NULL;
/* when $mail_check_recent is set and the .mh_sequences file hasn't changed
* since the last mailbox visit, there is no "new mail" */
if (option(OPT_MAIL_CHECK_RECENT) && mh_sequences_changed(mailbox) <= 0)
{
rc = 0;
check_new = 0;
}
if (!(check_new || check_stats))
return rc;
memset(&mhs, 0, sizeof(mhs));
if (mh_read_sequences(&mhs, mailbox->path) < 0)
return 0;
if (check_stats)
{
mailbox->msg_count = 0;
mailbox->msg_unread = 0;
mailbox->msg_flagged = 0;
}
for (int i = mhs.max; i > 0; i--)
{
if (check_stats && (mhs_check(&mhs, i) & MH_SEQ_FLAGGED))
mailbox->msg_flagged++;
if (mhs_check(&mhs, i) & MH_SEQ_UNSEEN)
{
if (check_stats)
mailbox->msg_unread++;
if (check_new)
{
/* if the first unseen message we encounter was in the mailbox during the
last visit, don't notify about it */
if (!option(OPT_MAIL_CHECK_RECENT) || mh_already_notified(mailbox, i) == 0)
{
mailbox->new = true;
rc = 1;
}
/* Because we are traversing from high to low, we can stop
* checking for new mail after the first unseen message.
* Whether it resulted in "new mail" or not. */
check_new = 0;
if (!check_stats)
break;
}
}
}
mhs_free_sequences(&mhs);
if (check_stats)
{
if ((dirp = opendir(mailbox->path)) != NULL)
{
while ((de = readdir(dirp)) != NULL)
{
if (*de->d_name == '.')
continue;
if (mh_valid_message(de->d_name))
mailbox->msg_count++;
}
closedir(dirp);
}
}
return rc;
}
static int mh_mkstemp(struct Context *dest, FILE **fp, char **tgt)
{
int fd;
char path[_POSIX_PATH_MAX];
mode_t omask;
omask = umask(mh_umask(dest));
while (true)
{
snprintf(path, _POSIX_PATH_MAX, "%s/.mutt-%s-%d-%" PRIu64, dest->path,
NONULL(Hostname), (int) getpid(), mutt_rand64());
if ((fd = open(path, O_WRONLY | O_EXCL | O_CREAT, 0666)) == -1)
{
if (errno != EEXIST)
{
mutt_perror(path);
umask(omask);
return -1;
}
}
else
{
*tgt = safe_strdup(path);
break;
}
}
umask(omask);
if ((*fp = fdopen(fd, "w")) == NULL)
{
FREE(tgt);
close(fd);
unlink(path);
return -1;
}
return 0;
}
static void mhs_write_one_sequence(FILE *fp, struct MhSequences *mhs, short f, const char *tag)
{
int first, last;
fprintf(fp, "%s:", tag);
first = -1;
last = -1;
for (int 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);
}
/**
* mh_update_sequences - Update sequence numbers
*
* XXX we don't currently remove deleted messages from sequences we don't know.
* Should we?
*/
static void mh_update_sequences(struct Context *ctx)
{
FILE *ofp = NULL, *nfp = NULL;
char sequences[_POSIX_PATH_MAX];
char *tmpfname = NULL;
char *buff = NULL;
char *p = NULL;
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 MhSequences 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, 0)))
{
if (mutt_strncmp(buff, seq_unseen, mutt_strlen(seq_unseen)) == 0)
continue;
if (mutt_strncmp(buff, seq_flagged, mutt_strlen(seq_flagged)) == 0)
continue;
if (mutt_strncmp(buff, seq_replied, mutt_strlen(seq_replied)) == 0)
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;
if (mutt_atoi(p, &i) < 0)
continue;
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);
}
FREE(&tmpfname);
}
static void mh_sequences_add_one(struct 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 = NULL;
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, 0)))
{
if (unseen && (strncmp(buff, seq_unseen, mutt_strlen(seq_unseen)) == 0))
{
fprintf(nfp, "%s %d\n", buff, n);
unseen_done = 1;
}
else if (flagged && (strncmp(buff, seq_flagged, mutt_strlen(seq_flagged)) == 0))
{
fprintf(nfp, "%s %d\n", buff, n);
flagged_done = 1;
}
else if (replied && (strncmp(buff, seq_replied, mutt_strlen(seq_replied)) == 0))
{
fprintf(nfp, "%s %d\n", buff, n);
replied_done = 1;
}
else
fprintf(nfp, "%s\n", buff);
}
}
safe_fclose(&ofp);
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);
FREE(&tmpfname);
}
static void mh_update_maildir(struct Maildir *md, struct MhSequences *mhs)
{
int i;
short f;
char *p = NULL;
for (; md; md = md->next)
{
if ((p = strrchr(md->h->path, '/')))
p++;
else
p = md->h->path;
if (mutt_atoi(p, &i) < 0)
continue;
f = mhs_check(mhs, i);
md->h->read = (f & MH_SEQ_UNSEEN) ? false : true;
md->h->flagged = (f & MH_SEQ_FLAGGED) ? true : false;
md->h->replied = (f & MH_SEQ_REPLIED) ? true : false;
}
}
/**
* maildir_free_entry - Free a maildir object
*/
static void maildir_free_entry(struct Maildir **md)
{
if (!md || !*md)
return;
FREE(&(*md)->canon_fname);
if ((*md)->h)
mutt_free_header(&(*md)->h);
FREE(md);
}
static void maildir_free_maildir(struct Maildir **md)
{
struct Maildir *p = NULL, *q = NULL;
if (!md || !*md)
return;
for (p = *md; p; p = q)
{
q = p->next;
maildir_free_entry(&p);
}
}
void maildir_parse_flags(struct Header *h, const char *path)
{
char *p = NULL, *q = NULL;
h->flagged = false;
h->read = false;
h->replied = false;
if ((p = strrchr(path, ':')) != NULL && (mutt_strncmp(p + 1, "2,", 2) == 0))
{
p += 3;
mutt_str_replace(&h->maildir_flags, p);
q = h->maildir_flags;
while (*p)
{
switch (*p)
{
case 'F':
h->flagged = true;
break;
case 'S': /* seen */
h->read = true;
break;
case 'R': /* replied */
h->replied = true;
break;
case 'T': /* trashed */
if (!h->flagged || !option(OPT_FLAG_SAFE))
{
h->trash = true;
h->deleted = true;
}
break;
default:
*q++ = *p;
break;
}
p++;
}
}
if (q == h->maildir_flags)
FREE(&h->maildir_flags);
else if (q)
*q = '\0';
}
static void maildir_update_mtime(struct Context *ctx)
{
char buf[_POSIX_PATH_MAX];
struct stat st;
struct MhData *data = mh_data(ctx);
if (ctx->magic == MUTT_MAILDIR)
{
snprintf(buf, sizeof(buf), "%s/%s", ctx->path, "cur");
if (stat(buf, &st) == 0)
data->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)
data->mtime_cur = st.st_mtime;
strfcpy(buf, ctx->path, sizeof(buf));
}
if (stat(buf, &st) == 0)
ctx->mtime = st.st_mtime;
}
/**
* maildir_parse_stream - Parse a Maildir message
*
* Actually parse a maildir message. This may also be used to fill
* out a fake header structure generated by lazy maildir parsing.
*/
struct Header *maildir_parse_stream(int magic, FILE *f, const char *fname,
int is_old, struct Header *_h)
{
struct Header *h = _h;
struct stat st;
if (!h)
h = mutt_new_header();
h->env = mutt_read_rfc822_header(f, h, 0, 0);
fstat(fileno(f), &st);
if (!h->received)
h->received = h->date_sent;
/* always update the length since we have fresh information available. */
h->content->length = st.st_size - h->content->offset;
h->index = -1;
if (magic == MUTT_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;
}
/**
* maildir_parse_message - Actually parse a maildir message
*
* This may also be used to fill out a fake header structure generated by lazy
* maildir parsing.
*/
struct Header *maildir_parse_message(int magic, const char *fname, int is_old,
struct Header *h)
{
FILE *f = NULL;
if ((f = fopen(fname, "r")) != NULL)
{
h = maildir_parse_stream(magic, f, fname, is_old, h);
safe_fclose(&f);
return h;
}
return NULL;
}
static int maildir_parse_dir(struct Context *ctx, struct Maildir ***last,
const char *subdir, int *count, struct Progress *progress)
{
DIR *dirp = NULL;
struct dirent *de = NULL;
char buf[_POSIX_PATH_MAX];
int is_old = 0;
struct Maildir *entry = NULL;
struct Header *h = NULL;
if (subdir)
{
snprintf(buf, sizeof(buf), "%s/%s", ctx->path, subdir);
is_old = option(OPT_MARK_OLD) ? (mutt_strcmp("cur", subdir) == 0) : false;
}
else
strfcpy(buf, ctx->path, sizeof(buf));
if ((dirp = opendir(buf)) == NULL)
return -1;
while (((de = readdir(dirp)) != NULL) && (SigInt != 1))
{
if ((ctx->magic == MUTT_MH && !mh_valid_message(de->d_name)) ||
(ctx->magic == MUTT_MAILDIR && *de->d_name == '.'))
continue;
/* FOO - really ignore the return value? */
mutt_debug(2, "%s:%d: queueing %s\n", __FILE__, __LINE__, de->d_name);
h = mutt_new_header();
h->old = is_old;
if (ctx->magic == MUTT_MAILDIR)
maildir_parse_flags(h, de->d_name);
if (count)
{
(*count)++;
if (!ctx->quiet && progress)
mutt_progress_update(progress, *count, -1);
}
if (subdir)
{
char tmp[_POSIX_PATH_MAX];
snprintf(tmp, sizeof(tmp), "%s/%s", subdir, de->d_name);
h->path = safe_strdup(tmp);
}
else
h->path = safe_strdup(de->d_name);
entry = safe_calloc(1, sizeof(struct Maildir));
entry->h = h;
entry->inode = de->d_ino;
**last = entry;
*last = &entry->next;
}
closedir(dirp);
if (SigInt == 1)
{
SigInt = 0;
return -2; /* action aborted */
}
return 0;
}
static bool maildir_add_to_context(struct Context *ctx, struct Maildir *md)
{
int oldmsgcount = ctx->msgcount;
while (md)
{
mutt_debug(2, "%s:%d maildir_add_to_context(): Considering %s\n", __FILE__,
__LINE__, NONULL(md->canon_fname));
if (md->h)
{
mutt_debug(2, "%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" : "");
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 true;
}
return false;
}
static int maildir_move_to_context(struct Context *ctx, struct Maildir **md)
{
int r;
r = maildir_add_to_context(ctx, *md);
maildir_free_maildir(md);
return r;
}
#ifdef USE_HCACHE
static size_t maildir_hcache_keylen(const char *fn)
{
const char *p = strrchr(fn, ':');
return p ? (size_t)(p - fn) : mutt_strlen(fn);
}
#endif
static int md_cmp_inode(struct Maildir *a, struct Maildir *b)
{
return a->inode - b->inode;
}
static int md_cmp_path(struct Maildir *a, struct Maildir *b)
{
return strcmp(a->h->path, b->h->path);
}
/**
* maildir_merge_lists - Merge two maildir lists according to the inode numbers
*/
static struct Maildir *maildir_merge_lists(struct Maildir *left, struct Maildir *right,
int (*cmp)(struct Maildir *, struct Maildir *))
{
struct Maildir *head = NULL;
struct Maildir *tail = NULL;
if (left && right)
{
if (cmp(left, right) < 0)
{
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 (cmp(left, right) < 0)
{
tail->next = left;
left = left->next;
}
else