message.c File Reference

Manage IMAP messages. More...

#include "config.h"
#include <assert.h>
#include <ctype.h>
#include <limits.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "private.h"
#include "mutt/lib.h"
#include "config/lib.h"
#include "email/lib.h"
#include "core/lib.h"
#include "conn/lib.h"
#include "gui/lib.h"
#include "mutt.h"
#include "message.h"
#include "lib.h"
#include "bcache/lib.h"
#include "progress/lib.h"
#include "question/lib.h"
#include "adata.h"
#include "edata.h"
#include "external.h"
#include "globals.h"
#include "mdata.h"
#include "msn.h"
#include "mutt_logging.h"
#include "mx.h"
#include "protos.h"
#include <libintl.h>
#include "hcache/lib.h"

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Functions
static struct BodyCache *	msg_cache_open (struct Mailbox *m)
	Open a message cache. More...
static FILE *	msg_cache_get (struct Mailbox *m, struct Email *e)
	Get the message cache entry for an email. More...
static FILE *	msg_cache_put (struct Mailbox *m, struct Email *e)
	Put an email into the message cache. More...
static int	msg_cache_commit (struct Mailbox *m, struct Email *e)
	Add to the message cache. More...
static int	msg_cache_clean_cb (const char *id, struct BodyCache *bcache, void *data)
	Delete an entry from the message cache - Implements bcache_list_t -. More...
static char *	msg_parse_flags (struct ImapHeader *h, char *s)
	Read a FLAGS token into an ImapHeader. More...
static int	msg_parse_fetch (struct ImapHeader *h, char *s)
	Handle headers returned from header fetch. More...
static int	msg_fetch_header (struct Mailbox *m, struct ImapHeader *ih, char *buf, FILE *fp)
	Import IMAP FETCH response into an ImapHeader. More...
static int	flush_buffer (char *buf, size_t *len, struct Connection *conn)
	Write data to a connection. More...
static bool	query_abort_header_download (struct ImapAccountData *adata)
	Ask the user whether to abort the download. More...
static void	imap_alloc_uid_hash (struct ImapAccountData *adata, unsigned int msn_count)
	Create a Hash Table for the UIDs. More...
static unsigned int	imap_fetch_msn_seqset (struct Buffer *buf, struct ImapAccountData *adata, bool evalhc, unsigned int msn_begin, unsigned int msn_end, unsigned int *fetch_msn_end)
	Generate a sequence set. More...
static void	set_changed_flag (struct Mailbox *m, struct Email *e, int local_changes, bool *server_changes, enum MessageType flag_name, bool old_hd_flag, bool new_hd_flag, bool h_flag)
	Have the flags of an email changed. More...
static int	read_headers_normal_eval_cache (struct ImapAccountData *adata, unsigned int msn_end, unsigned int uid_next, bool store_flag_updates, bool eval_condstore)
	Retrieve data from the header cache. More...
static int	read_headers_qresync_eval_cache (struct ImapAccountData *adata, char *uid_seqset)
	Retrieve data from the header cache. More...
static int	read_headers_condstore_qresync_updates (struct ImapAccountData *adata, unsigned int msn_end, unsigned int uid_next, unsigned long long hc_modseq, bool eval_qresync)
	Retrieve updates from the server. More...
static int	imap_verify_qresync (struct Mailbox *m)
	Check to see if QRESYNC got jumbled. More...
static int	read_headers_fetch_new (struct Mailbox *m, unsigned int msn_begin, unsigned int msn_end, bool evalhc, unsigned int *maxuid, bool initial_download)
	Retrieve new messages from the server. More...
int	imap_read_headers (struct Mailbox *m, unsigned int msn_begin, unsigned int msn_end, bool initial_download)
	Read headers from the server. More...
int	imap_append_message (struct Mailbox *m, struct Message *msg)
	Write an email back to the server. More...
int	imap_copy_messages (struct Mailbox *m, struct EmailList *el, const char *dest, enum MessageSaveOpt save_opt)
	Server COPY messages to another folder. More...
int	imap_cache_del (struct Mailbox *m, struct Email *e)
	Delete an email from the body cache. More...
int	imap_cache_clean (struct Mailbox *m)
	Delete all the entries in the message cache. More...
char *	imap_set_flags (struct Mailbox *m, struct Email *e, char *s, bool *server_changes)
	Fill the message header according to the server flags. More...
bool	imap_msg_open (struct Mailbox *m, struct Message *msg, int msgno)
	Open an email message in a Mailbox - Implements MxOps::msg_open() -. More...
int	imap_msg_commit (struct Mailbox *m, struct Message *msg)
	Save changes to an email - Implements MxOps::msg_commit() -. More...
int	imap_msg_close (struct Mailbox *m, struct Message *msg)
	Close an email - Implements MxOps::msg_close() -. More...
int	imap_msg_save_hcache (struct Mailbox *m, struct Email *e)
	Save message to the header cache - Implements MxOps::msg_save_hcache() -. More...

Detailed Description

Manage IMAP messages.

Authors

• Brandon Long
• Brendan Cully
• Richard Russon

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/.

Definition in file message.c.

Function Documentation

msg_cache_open()

static struct BodyCache * msg_cache_open ( struct Mailbox *  m )

static

Open a message cache.

Parameters

m	Selected Imap Mailbox

Return values

ptr	Success, using existing cache (or opened new cache)
NULL	Failure

Definition at line 77 of file message.c.

{
  struct ImapAccountData *adata = imap_adata_get(m);
  struct ImapMboxData *mdata = imap_mdata_get(m);
 
  if (!adata || (adata->mailbox != m))
    return NULL;
 
  if (mdata->bcache)
    return mdata->bcache;
 
  struct Buffer *mailbox = mutt_buffer_pool_get();
  imap_cachepath(adata->delim, mdata->name, mailbox);
 
  struct BodyCache *bc = mutt_bcache_open(&adata->conn->account,
                                          mutt_buffer_string(mailbox));
  mutt_buffer_pool_release(&mailbox);
 
  return bc;
}

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msg_cache_get()

static FILE * msg_cache_get ( struct Mailbox *  m, struct Email *  e  )

static

Get the message cache entry for an email.

Parameters

m	Selected Imap Mailbox
e	Email

Return values

ptr	Success, handle of cache entry
NULL	Failure

Definition at line 105 of file message.c.

{
  struct ImapAccountData *adata = imap_adata_get(m);
  struct ImapMboxData *mdata = imap_mdata_get(m);
 
  if (!e || !adata || (adata->mailbox != m))
    return NULL;
 
  mdata->bcache = msg_cache_open(m);
  char id[64] = { 0 };
  snprintf(id, sizeof(id), "%u-%u", mdata->uidvalidity, imap_edata_get(e)->uid);
  return mutt_bcache_get(mdata->bcache, id);
}

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msg_cache_put()

static FILE * msg_cache_put ( struct Mailbox *  m, struct Email *  e  )

static

Put an email into the message cache.

Parameters

m	Selected Imap Mailbox
e	Email

Return values

ptr	Success, handle of cache entry
NULL	Failure

Definition at line 126 of file message.c.

{
  struct ImapAccountData *adata = imap_adata_get(m);
  struct ImapMboxData *mdata = imap_mdata_get(m);
 
  if (!e || !adata || (adata->mailbox != m))
    return NULL;
 
  mdata->bcache = msg_cache_open(m);
  char id[64] = { 0 };
  snprintf(id, sizeof(id), "%u-%u", mdata->uidvalidity, imap_edata_get(e)->uid);
  return mutt_bcache_put(mdata->bcache, id);
}

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msg_cache_commit()

static int msg_cache_commit ( struct Mailbox *  m, struct Email *  e  )

static

Add to the message cache.

Parameters

m	Selected Imap Mailbox
e	Email

Return values

0	Success
-1	Failure

Definition at line 147 of file message.c.

{
  struct ImapAccountData *adata = imap_adata_get(m);
  struct ImapMboxData *mdata = imap_mdata_get(m);
 
  if (!e || !adata || (adata->mailbox != m))
    return -1;
 
  mdata->bcache = msg_cache_open(m);
  char id[64] = { 0 };
  snprintf(id, sizeof(id), "%u-%u", mdata->uidvalidity, imap_edata_get(e)->uid);
 
  return mutt_bcache_commit(mdata->bcache, id);
}

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msg_parse_flags()

static char * msg_parse_flags ( struct ImapHeader *  h, char *  s  )

static

Read a FLAGS token into an ImapHeader.

Parameters

h	Header to store flags
s	Command string containing flags

Return values

ptr	The end of flags string
NULL	Failure

Definition at line 189 of file message.c.

{
  struct ImapEmailData *edata = h->edata;
 
  /* sanity-check string */
  size_t plen = mutt_istr_startswith(s, "FLAGS");
  if (plen == 0)
  {
    mutt_debug(LL_DEBUG1, "not a FLAGS response: %s\n", s);
    return NULL;
  }
  s += plen;
  SKIPWS(s);
  if (*s != '(')
  {
    mutt_debug(LL_DEBUG1, "bogus FLAGS response: %s\n", s);
    return NULL;
  }
  s++;
 
  FREE(&edata->flags_system);
  FREE(&edata->flags_remote);
 
  edata->deleted = false;
  edata->flagged = false;
  edata->replied = false;
  edata->read = false;
  edata->old = false;
 
  /* start parsing */
  while (*s && (*s != ')'))
  {
    if ((plen = mutt_istr_startswith(s, "\\deleted")))
    {
      s += plen;
      edata->deleted = true;
    }
    else if ((plen = mutt_istr_startswith(s, "\\flagged")))
    {
      s += plen;
      edata->flagged = true;
    }
    else if ((plen = mutt_istr_startswith(s, "\\answered")))
    {
      s += plen;
      edata->replied = true;
    }
    else if ((plen = mutt_istr_startswith(s, "\\seen")))
    {
      s += plen;
      edata->read = true;
    }
    else if ((plen = mutt_istr_startswith(s, "\\recent")))
    {
      s += plen;
    }
    else if ((plen = mutt_istr_startswith(s, "old")))
    {
      s += plen;
      edata->old = cs_subset_bool(NeoMutt->sub, "mark_old");
    }
    else
    {
      char ctmp;
      char *flag_word = s;
      bool is_system_keyword = mutt_istr_startswith(s, "\\");
 
      while (*s && !IS_SPACE(*s) && (*s != ')'))
        s++;
 
      ctmp = *s;
      *s = '\0';
 
      /* store other system flags as well (mainly \\Draft) */
      if (is_system_keyword)
        mutt_str_append_item(&edata->flags_system, flag_word, ' ');
      /* store custom flags as well */
      else
        mutt_str_append_item(&edata->flags_remote, flag_word, ' ');
 
      *s = ctmp;
    }
    SKIPWS(s);
  }
 
  /* wrap up, or note bad flags response */
  if (*s == ')')
  {
    s++;
  }
  else
  {
    mutt_debug(LL_DEBUG1, "Unterminated FLAGS response: %s\n", s);
    return NULL;
  }
 
  return s;
}

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msg_parse_fetch()

static int msg_parse_fetch ( struct ImapHeader *  h, char *  s  )

static

Handle headers returned from header fetch.

Parameters

h	IMAP Header
s	Command string

Return values

0	Success
-1	String is corrupted
-2	Fetch contains a body or header lines that still need to be parsed

Definition at line 296 of file message.c.

{
  if (!s)
    return -1;
 
  char tmp[128] = { 0 };
  char *ptmp = NULL;
  size_t plen = 0;
 
  while (*s)
  {
    SKIPWS(s);
 
    if (mutt_istr_startswith(s, "FLAGS"))
    {
      s = msg_parse_flags(h, s);
      if (!s)
        return -1;
    }
    else if ((plen = mutt_istr_startswith(s, "UID")))
    {
      s += plen;
      SKIPWS(s);
      if (!mutt_str_atoui(s, &h->edata->uid))
        return -1;
 
      s = imap_next_word(s);
    }
    else if ((plen = mutt_istr_startswith(s, "INTERNALDATE")))
    {
      s += plen;
      SKIPWS(s);
      if (*s != '\"')
      {
        mutt_debug(LL_DEBUG1, "bogus INTERNALDATE entry: %s\n", s);
        return -1;
      }
      s++;
      ptmp = tmp;
      while (*s && (*s != '\"') && (ptmp != (tmp + sizeof(tmp) - 1)))
        *ptmp++ = *s++;
      if (*s != '\"')
        return -1;
      s++; /* skip past the trailing " */
      *ptmp = '\0';
      h->received = mutt_date_parse_imap(tmp);
    }
    else if ((plen = mutt_istr_startswith(s, "RFC822.SIZE")))
    {
      s += plen;
      SKIPWS(s);
      ptmp = tmp;
      while (isdigit((unsigned char) *s) && (ptmp != (tmp + sizeof(tmp) - 1)))
        *ptmp++ = *s++;
      *ptmp = '\0';
      if (!mutt_str_atol(tmp, &h->content_length))
        return -1;
    }
    else if (mutt_istr_startswith(s, "BODY") || mutt_istr_startswith(s, "RFC822.HEADER"))
    {
      /* handle above, in msg_fetch_header */
      return -2;
    }
    else if ((plen = mutt_istr_startswith(s, "MODSEQ")))
    {
      s += plen;
      SKIPWS(s);
      if (*s != '(')
      {
        mutt_debug(LL_DEBUG1, "bogus MODSEQ response: %s\n", s);
        return -1;
      }
      s++;
      while (*s && (*s != ')'))
        s++;
      if (*s == ')')
      {
        s++;
      }
      else
      {
        mutt_debug(LL_DEBUG1, "Unterminated MODSEQ response: %s\n", s);
        return -1;
      }
    }
    else if (*s == ')')
      s++; /* end of request */
    else if (*s)
    {
      /* got something i don't understand */
      imap_error("msg_parse_fetch", s);
      return -1;
    }
  }
 
  return 0;
}

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msg_fetch_header()

static int msg_fetch_header ( struct Mailbox *  m, struct ImapHeader *  ih, char *  buf, FILE *  fp  )

static

Import IMAP FETCH response into an ImapHeader.

Parameters

m	Mailbox
ih	ImapHeader
buf	Server string containing FETCH response
fp	Connection to server

Return values

0	Success
-1	String is not a fetch response
-2	String is a corrupt fetch response

Expects string beginning with * n FETCH.

Definition at line 406 of file message.c.

{
  int rc = -1; /* default now is that string isn't FETCH response */
 
  struct ImapAccountData *adata = imap_adata_get(m);
 
  if (buf[0] != '*')
    return rc;
 
  /* skip to message number */
  buf = imap_next_word(buf);
  if (!mutt_str_atoui(buf, &ih->edata->msn))
    return rc;
 
  /* find FETCH tag */
  buf = imap_next_word(buf);
  if (!mutt_istr_startswith(buf, "FETCH"))
    return rc;
 
  rc = -2; /* we've got a FETCH response, for better or worse */
  buf = strchr(buf, '(');
  if (!buf)
    return rc;
  buf++;
 
  /* FIXME: current implementation - call msg_parse_fetch - if it returns -2,
   *   read header lines and call it again. Silly. */
  int parse_rc = msg_parse_fetch(ih, buf);
  if (parse_rc == 0)
    return 0;
  if ((parse_rc != -2) || !fp)
    return rc;
 
  unsigned int bytes = 0;
  if (imap_get_literal_count(buf, &bytes) == 0)
  {
    imap_read_literal(fp, adata, bytes, NULL);
 
    /* we may have other fields of the FETCH _after_ the literal
     * (eg Domino puts FLAGS here). Nothing wrong with that, either.
     * This all has to go - we should accept literals and nonliterals
     * interchangeably at any time. */
    if (imap_cmd_step(adata) != IMAP_RES_CONTINUE)
      return rc;
 
    if (msg_parse_fetch(ih, adata->buf) == -1)
      return rc;
  }
 
  rc = 0; /* success */
 
  /* subtract headers from message size - unfortunately only the subset of
   * headers we've requested. */
  ih->content_length -= bytes;
 
  return rc;
}

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flush_buffer()

static int flush_buffer ( char *  buf, size_t *  len, struct Connection *  conn  )

static

Write data to a connection.

Parameters

buf	Buffer containing data
len	Length of buffer
conn	Network connection

Return values

>0	Number of bytes written
-1	Error

Definition at line 472 of file message.c.

{
  buf[*len] = '\0';
  int rc = mutt_socket_write_n(conn, buf, *len);
  *len = 0;
  return rc;
}

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query_abort_header_download()

static bool query_abort_header_download ( struct ImapAccountData *  adata )

static

Ask the user whether to abort the download.

Parameters

adata

Imap Account data

Return values

true	Abort the download

If the user hits ctrl-c during an initial header download for a mailbox, prompt whether to completely abort the download and close the mailbox.

Definition at line 488 of file message.c.

{
  bool abort = false;
 
  mutt_flushinp();
  /* L10N: This prompt is made if the user hits Ctrl-C when opening an IMAP mailbox */
  if (mutt_yesorno(_("Abort download and close mailbox?"), MUTT_YES) == MUTT_YES)
  {
    abort = true;
    imap_close_connection(adata);
  }
  SigInt = false;
 
  return abort;
}

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imap_alloc_uid_hash()

static void imap_alloc_uid_hash ( struct ImapAccountData *  adata, unsigned int  msn_count  )

static

Create a Hash Table for the UIDs.

Parameters

adata	Imap Account data
msn_count	Number of MSNs in use

This function is run after imap_imap_msn_reserve, so we skip the malicious msn_count size check.

Definition at line 512 of file message.c.

{
  struct ImapMboxData *mdata = adata->mailbox->mdata;
  if (!mdata->uid_hash)
    mdata->uid_hash = mutt_hash_int_new(MAX(6 * msn_count / 5, 30), MUTT_HASH_NO_FLAGS);
}

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imap_fetch_msn_seqset()

static unsigned int imap_fetch_msn_seqset ( struct Buffer *  buf, struct ImapAccountData *  adata, bool  evalhc, unsigned int  msn_begin, unsigned int  msn_end, unsigned int *  fetch_msn_end  )

static

Generate a sequence set.

Parameters

[in]	buf	Buffer for the result
[in]	adata	Imap Account data
[in]	evalhc	If true, check the Header Cache
[in]	msn_begin	First Message Sequence Number
[in]	msn_end	Last Message Sequence Number
[out]	fetch_msn_end	Highest Message Sequence Number fetched

Return values

num

MSN count

Generates a more complicated sequence set after using the header cache, in case there are missing MSNs in the middle.

This can happen if during a sync/close, messages are deleted from the cache, but the server doesn't get the updates (via a dropped network connection, or just plain refusing the updates).

Definition at line 536 of file message.c.

{
  struct ImapMboxData *mdata = adata->mailbox->mdata;
  unsigned int max_headers_per_fetch = UINT_MAX;
  bool first_chunk = true;
  int state = 0; /* 1: single msn, 2: range of msn */
  unsigned int msn;
  unsigned int range_begin = 0;
  unsigned int range_end = 0;
  unsigned int msn_count = 0;
 
  mutt_buffer_reset(buf);
  if (msn_end < msn_begin)
    return 0;
 
  const long c_imap_fetch_chunk_size = cs_subset_long(NeoMutt->sub, "imap_fetch_chunk_size");
  if (c_imap_fetch_chunk_size > 0)
    max_headers_per_fetch = c_imap_fetch_chunk_size;
 
  if (!evalhc)
  {
    if (msn_end - msn_begin + 1 <= max_headers_per_fetch)
      *fetch_msn_end = msn_end;
    else
      *fetch_msn_end = msn_begin + max_headers_per_fetch - 1;
    mutt_buffer_printf(buf, "%u:%u", msn_begin, *fetch_msn_end);
    return (*fetch_msn_end - msn_begin + 1);
  }
 
  for (msn = msn_begin; msn <= (msn_end + 1); msn++)
  {
    if (msn_count < max_headers_per_fetch && msn <= msn_end &&
        !imap_msn_get(&mdata->msn, msn - 1))
    {
      msn_count++;
 
      switch (state)
      {
        case 1: /* single: convert to a range */
          state = 2;
        /* fallthrough */
        case 2: /* extend range ending */
          range_end = msn;
          break;
        default:
          state = 1;
          range_begin = msn;
          break;
      }
    }
    else if (state)
    {
      if (first_chunk)
        first_chunk = false;
      else
        mutt_buffer_addch(buf, ',');
 
      if (state == 1)
        mutt_buffer_add_printf(buf, "%u", range_begin);
      else if (state == 2)
        mutt_buffer_add_printf(buf, "%u:%u", range_begin, range_end);
      state = 0;
 
      if ((mutt_buffer_len(buf) > 500) || (msn_count >= max_headers_per_fetch))
        break;
    }
  }
 
  /* The loop index goes one past to terminate the range if needed. */
  *fetch_msn_end = msn - 1;
 
  return msn_count;
}

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set_changed_flag()

static void set_changed_flag ( struct Mailbox *  m, struct Email *  e, int  local_changes, bool *  server_changes, enum MessageType  flag_name, bool  old_hd_flag, bool  new_hd_flag, bool  h_flag  )

static

Have the flags of an email changed.

Parameters

[in]	m	Mailbox
[in]	e	Email
[in]	local_changes	Has the local mailbox been changed?
[out]	server_changes	Set to true if the flag has changed
[in]	flag_name	Flag to check, e.g. MUTT_FLAG
[in]	old_hd_flag	Old header flags
[in]	new_hd_flag	New header flags
[in]	h_flag	Email's value for flag_name

Sets server_changes to 1 if a change to a flag is made, or in the case of local_changes, if a change to a flag would have been made.

Definition at line 627 of file message.c.

{
  /* If there are local_changes, we only want to note if the server
   * flags have changed, so we can set a reopen flag in
   * cmd_parse_fetch().  We don't want to count a local modification
   * to the header flag as a "change".  */
  if ((old_hd_flag == new_hd_flag) && (local_changes != 0))
    return;
 
  if (new_hd_flag == h_flag)
    return;
 
  if (server_changes)
    *server_changes = true;
 
  /* Local changes have priority */
  if (local_changes == 0)
    mutt_set_flag(m, e, flag_name, new_hd_flag);
}

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read_headers_normal_eval_cache()

static int read_headers_normal_eval_cache ( struct ImapAccountData *  adata, unsigned int  msn_end, unsigned int  uid_next, bool  store_flag_updates, bool  eval_condstore  )

static

Retrieve data from the header cache.

Parameters

adata	Imap Account data
msn_end	Last Message Sequence number
uid_next	UID of next email
store_flag_updates	if true, save flags to the header cache
eval_condstore	if true, use CONDSTORE to fetch flags

Return values

0	Success
-1	Error

Without CONDSTORE or QRESYNC, we need to query all the current UIDs and update their flag state and current MSN.

For CONDSTORE, we still need to grab the existing UIDs and their MSN. The current flag state will be queried in read_headers_condstore_qresync_updates().

Definition at line 667 of file message.c.

{
  struct Progress *progress = NULL;
  char buf[1024] = { 0 };
  int rc = -1;
 
  struct Mailbox *m = adata->mailbox;
  struct ImapMboxData *mdata = imap_mdata_get(m);
  int idx = m->msg_count;
 
  if (m->verbose)
  {
    /* L10N: Comparing the cached data with the IMAP server's data */
    progress = progress_new(_("Evaluating cache..."), MUTT_PROGRESS_READ, msn_end);
  }
 
  /* If we are using CONDSTORE's "FETCH CHANGEDSINCE", then we keep
   * the flags in the header cache, and update them further below.
   * Otherwise, we fetch the current state of the flags here. */
  snprintf(buf, sizeof(buf), "UID FETCH 1:%u (UID%s)", uid_next - 1,
           eval_condstore ? "" : " FLAGS");
 
  imap_cmd_start(adata, buf);
 
  rc = IMAP_RES_CONTINUE;
  int mfhrc = 0;
  struct ImapHeader h;
  for (int msgno = 1; rc == IMAP_RES_CONTINUE; msgno++)
  {
    if (SigInt && query_abort_header_download(adata))
      goto fail;
 
    if (m->verbose)
      progress_update(progress, msgno, -1);
 
    memset(&h, 0, sizeof(h));
    h.edata = imap_edata_new();
    do
    {
      rc = imap_cmd_step(adata);
      if (rc != IMAP_RES_CONTINUE)
        break;
 
      mfhrc = msg_fetch_header(m, &h, adata->buf, NULL);
      if (mfhrc < 0)
        continue;
 
      if (!h.edata->uid)
      {
        mutt_debug(LL_DEBUG2, "skipping hcache FETCH response for message number %d missing a UID\n",
                   h.edata->msn);
        continue;
      }
 
      if ((h.edata->msn < 1) || (h.edata->msn > msn_end))
      {
        mutt_debug(LL_DEBUG1, "skipping hcache FETCH response for unknown message number %d\n",
                   h.edata->msn);
        continue;
      }
 
      if (imap_msn_get(&mdata->msn, h.edata->msn - 1))
      {
        mutt_debug(LL_DEBUG2, "skipping hcache FETCH for duplicate message %d\n",
                   h.edata->msn);
        continue;
      }
 
      struct Email *e = imap_hcache_get(mdata, h.edata->uid);
      m->emails[idx] = e;
      if (e)
      {
        imap_msn_set(&mdata->msn, h.edata->msn - 1, e);
        mutt_hash_int_insert(mdata->uid_hash, h.edata->uid, e);
 
        e->index = h.edata->uid;
        /* messages which have not been expunged are ACTIVE (borrowed from mh
         * folders) */
        e->active = true;
        e->changed = false;
        if (eval_condstore)
        {
          h.edata->read = e->read;
          h.edata->old = e->old;
          h.edata->deleted = e->deleted;
          h.edata->flagged = e->flagged;
          h.edata->replied = e->replied;
        }
        else
        {
          e->read = h.edata->read;
          e->old = h.edata->old;
          e->deleted = h.edata->deleted;
          e->flagged = h.edata->flagged;
          e->replied = h.edata->replied;
        }
 
        /*  mailbox->emails[msgno]->received is restored from mutt_hcache_restore */
        e->edata = h.edata;
        e->edata_free = imap_edata_free;
 
        /* We take a copy of the tags so we can split the string */
        char *tags_copy = mutt_str_dup(h.edata->flags_remote);
        driver_tags_replace(&e->tags, tags_copy);
        FREE(&tags_copy);
 
        m->msg_count++;
        mailbox_size_add(m, e);
 
        /* If this is the first time we are fetching, we need to
         * store the current state of flags back into the header cache */
        if (!eval_condstore && store_flag_updates)
          imap_hcache_put(mdata, e);
 
        h.edata = NULL;
        idx++;
      }
    } while (mfhrc == -1);
 
    imap_edata_free((void **) &h.edata);
 
    if ((mfhrc < -1) || ((rc != IMAP_RES_CONTINUE) && (rc != IMAP_RES_OK)))
      goto fail;
  }
 
  rc = 0;
fail:
  progress_free(&progress);
  return rc;
}

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read_headers_qresync_eval_cache()

static int read_headers_qresync_eval_cache ( struct ImapAccountData *  adata, char *  uid_seqset  )

static

Retrieve data from the header cache.

Parameters

adata	Imap Account data
uid_seqset	Sequence Set of UIDs

Return values

>=0	Success
-1	Error

For QRESYNC, we grab the UIDs in order by MSN from the header cache.

In read_headers_condstore_qresync_updates(). We will update change flags using CHANGEDSINCE and find out what UIDs have been expunged using VANISHED.

Definition at line 812 of file message.c.

{
  int rc;
  unsigned int uid = 0;
 
  mutt_debug(LL_DEBUG2, "Reading uid seqset from header cache\n");
  struct Mailbox *m = adata->mailbox;
  struct ImapMboxData *mdata = adata->mailbox->mdata;
  unsigned int msn = 1;
 
  if (m->verbose)
    mutt_message(_("Evaluating cache..."));
 
  struct SeqsetIterator *iter = mutt_seqset_iterator_new(uid_seqset);
  if (!iter)
    return -1;
 
  while ((rc = mutt_seqset_iterator_next(iter, &uid)) == 0)
  {
    /* The seqset may contain more headers than the fetch request, so
     * we need to watch and reallocate the context and msn_index */
    imap_msn_reserve(&mdata->msn, msn);
 
    struct Email *e = imap_hcache_get(mdata, uid);
    if (e)
    {
      imap_msn_set(&mdata->msn, msn - 1, e);
 
      if (m->msg_count >= m->email_max)
        mx_alloc_memory(m);
 
      struct ImapEmailData *edata = imap_edata_new();
      e->edata = edata;
      e->edata_free = imap_edata_free;
 
      e->index = uid;
      e->active = true;
      e->changed = false;
      edata->read = e->read;
      edata->old = e->old;
      edata->deleted = e->deleted;
      edata->flagged = e->flagged;
      edata->replied = e->replied;
 
      edata->msn = msn;
      edata->uid = uid;
      mutt_hash_int_insert(mdata->uid_hash, uid, e);
 
      mailbox_size_add(m, e);
      m->emails[m->msg_count++] = e;
 
      msn++;
    }
    /* A non-zero uid missing from the header cache is either the
     * result of an expunged message (not recorded in the uid seqset)
     * or a hole in the header cache.
     *
     * We have to assume it's an earlier expunge and compact the msn's
     * in that case, because cmd_parse_vanished() won't find it in the
     * uid_hash and decrement later msn's there.
     *
     * Thus we only increment the uid if the uid was 0: an actual
     * stored "blank" in the uid seqset.
     */
    else if (!uid)
    {
      msn++;
    }
  }
 
  mutt_seqset_iterator_free(&iter);
 
  return rc;
}

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read_headers_condstore_qresync_updates()

static int read_headers_condstore_qresync_updates ( struct ImapAccountData *  adata, unsigned int  msn_end, unsigned int  uid_next, unsigned long long  hc_modseq, bool  eval_qresync  )

static

Retrieve updates from the server.

Parameters

adata	Imap Account data
msn_end	Last Message Sequence number
uid_next	UID of next email
hc_modseq	Timestamp of last Header Cache update
eval_qresync	If true, use QRESYNC

Return values

0	Success
-1	Error

CONDSTORE and QRESYNC use FETCH extensions to grab updates.

Definition at line 899 of file message.c.

{
  struct Progress *progress = NULL;
  char buf[1024] = { 0 };
  unsigned int header_msn = 0;
 
  struct Mailbox *m = adata->mailbox;
  struct ImapMboxData *mdata = imap_mdata_get(m);
 
  if (m->verbose)
  {
    /* L10N: Fetching IMAP flag changes, using the CONDSTORE extension */
    progress = progress_new(_("Fetching flag updates..."), MUTT_PROGRESS_READ, msn_end);
  }
 
  snprintf(buf, sizeof(buf), "UID FETCH 1:%u (FLAGS) (CHANGEDSINCE %llu%s)",
           uid_next - 1, hc_modseq, eval_qresync ? " VANISHED" : "");
 
  imap_cmd_start(adata, buf);
 
  int rc = IMAP_RES_CONTINUE;
  for (int msgno = 1; rc == IMAP_RES_CONTINUE; msgno++)
  {
    if (SigInt && query_abort_header_download(adata))
      goto fail;
 
    if (m->verbose)
      progress_update(progress, msgno, -1);
 
    /* cmd_parse_fetch will update the flags */
    rc = imap_cmd_step(adata);
    if (rc != IMAP_RES_CONTINUE)
      break;
 
    /* so we just need to grab the header and persist it back into
     * the header cache */
    char *fetch_buf = adata->buf;
    if (fetch_buf[0] != '*')
      continue;
 
    fetch_buf = imap_next_word(fetch_buf);
    if (!isdigit((unsigned char) *fetch_buf) || !mutt_str_atoui(fetch_buf, &header_msn))
      continue;
 
    if ((header_msn < 1) || (header_msn > msn_end) ||
        !imap_msn_get(&mdata->msn, header_msn - 1))
    {
      mutt_debug(LL_DEBUG1, "skipping CONDSTORE flag update for unknown message number %u\n",
                 header_msn);
      continue;
    }
 
    imap_hcache_put(mdata, imap_msn_get(&mdata->msn, header_msn - 1));
  }
 
  if (rc != IMAP_RES_OK)
    goto fail;
 
  /* The IMAP flag setting as part of cmd_parse_fetch() ends up
   * flipping these on. */
  mdata->check_status &= ~IMAP_FLAGS_PENDING;
  m->changed = false;
 
  /* VANISHED handling: we need to empty out the messages */
  if (mdata->reopen & IMAP_EXPUNGE_PENDING)
  {
    imap_hcache_close(mdata);
    imap_expunge_mailbox(m, false);
 
    imap_hcache_open(adata, mdata);
    mdata->reopen &= ~IMAP_EXPUNGE_PENDING;
  }
 
  /* undo expunge count updates.
   * mview_update() will do this at the end of the header fetch. */
  m->vcount = 0;
  m->msg_tagged = 0;
  m->msg_deleted = 0;
  m->msg_new = 0;
  m->msg_unread = 0;
  m->msg_flagged = 0;
  m->changed = false;
 
  rc = 0;
fail:
  progress_free(&progress);
  return rc;
}

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imap_verify_qresync()

static int imap_verify_qresync ( struct Mailbox *  m )

static

Check to see if QRESYNC got jumbled.

Parameters

m	Imap Selected Mailbox

Return values

0	Success
-1	Error

If so, wipe the context and try again with a normal download.

Definition at line 998 of file message.c.

{
  assert(m);
  struct ImapAccountData *adata = imap_adata_get(m);
  struct ImapMboxData *mdata = imap_mdata_get(m);
  if (!adata || (adata->mailbox != m))
    return -1;
 
  const size_t max_msn = imap_msn_highest(&mdata->msn);
 
  unsigned int msn;
  unsigned int uid;
  struct Email *e = NULL;
  struct Email *uidh = NULL;
 
  for (int i = 0; i < m->msg_count; i++)
  {
    e = m->emails[i];
    const struct ImapEmailData *edata = imap_edata_get(e);
    if (!edata)
      goto fail;
 
    msn = imap_edata_get(e)->msn;
    uid = imap_edata_get(e)->uid;
 
    if ((msn < 1) || (msn > max_msn) || imap_msn_get(&mdata->msn, msn - 1) != e)
      goto fail;
 
    uidh = (struct Email *) mutt_hash_int_find(mdata->uid_hash, uid);
    if (uidh != e)
      goto fail;
  }
 
  return 0;
 
fail:
  imap_msn_free(&mdata->msn);
  mutt_hash_free(&mdata->uid_hash);
  mutt_hash_free(&m->subj_hash);
  mutt_hash_free(&m->id_hash);
  mutt_hash_free(&m->label_hash);
 
  for (int i = 0; i < m->msg_count; i++)
  {
    if (m->emails[i] && m->emails[i]->edata)
      imap_edata_free(&m->emails[i]->edata);
    email_free(&m->emails[i]);
  }
  m->msg_count = 0;
  m->size = 0;
  mutt_hcache_delete_record(mdata->hcache, "/MODSEQ", 7);
  imap_hcache_clear_uid_seqset(mdata);
  imap_hcache_close(mdata);
 
  if (m->verbose)
  {
    /* L10N: After opening an IMAP mailbox using QRESYNC, Mutt performs a quick
       sanity check.  If that fails, Mutt reopens the mailbox using a normal
       download.  */
    mutt_error(_("QRESYNC failed.  Reopening mailbox."));
  }
  return -1;
}

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read_headers_fetch_new()

static int read_headers_fetch_new ( struct Mailbox *  m, unsigned int  msn_begin, unsigned int  msn_end, bool  evalhc, unsigned int *  maxuid, bool  initial_download  )

static

Retrieve new messages from the server.

Parameters

[in]	m	Imap Selected Mailbox
[in]	msn_begin	First Message Sequence number
[in]	msn_end	Last Message Sequence number
[in]	evalhc	If true, check the Header Cache
[out]	maxuid	Highest UID seen
[in]	initial_download	true, if this is the first opening of the mailbox

Return values

0	Success
-1	Error

Definition at line 1075 of file message.c.

{
  int retval = -1;
  unsigned int fetch_msn_end = 0;
  struct Progress *progress = NULL;
  char *hdrreq = NULL;
  struct Buffer *tempfile = NULL;
  FILE *fp = NULL;
  struct ImapHeader h;
  struct Buffer *buf = NULL;
  static const char *const want_headers = "DATE FROM SENDER SUBJECT TO CC MESSAGE-ID REFERENCES "
                                          "CONTENT-TYPE CONTENT-DESCRIPTION IN-REPLY-TO REPLY-TO "
                                          "LINES LIST-POST LIST-SUBSCRIBE LIST-UNSUBSCRIBE X-LABEL "
                                          "X-ORIGINAL-TO";
 
  struct ImapAccountData *adata = imap_adata_get(m);
  struct ImapMboxData *mdata = imap_mdata_get(m);
 
  if (!adata || (adata->mailbox != m))
    return -1;
 
  struct Buffer *hdr_list = mutt_buffer_pool_get();
  mutt_buffer_strcpy(hdr_list, want_headers);
  const char *const c_imap_headers = cs_subset_string(NeoMutt->sub, "imap_headers");
  if (c_imap_headers)
  {
    mutt_buffer_addch(hdr_list, ' ');
    mutt_buffer_addstr(hdr_list, c_imap_headers);
  }
#ifdef USE_AUTOCRYPT
  const bool c_autocrypt = cs_subset_bool(NeoMutt->sub, "autocrypt");
  if (c_autocrypt)
  {
    mutt_buffer_addch(hdr_list, ' ');
    mutt_buffer_addstr(hdr_list, "AUTOCRYPT");
  }
#endif
 
  if (adata->capabilities & IMAP_CAP_IMAP4REV1)
  {
    mutt_str_asprintf(&hdrreq, "BODY.PEEK[HEADER.FIELDS (%s)]", mutt_buffer_string(hdr_list));
  }
  else if (adata->capabilities & IMAP_CAP_IMAP4)
  {
    mutt_str_asprintf(&hdrreq, "RFC822.HEADER.LINES (%s)", mutt_buffer_string(hdr_list));
  }
  else
  { /* Unable to fetch headers for lower versions */
    mutt_error(_("Unable to fetch headers from this IMAP server version"));
    goto bail;
  }
 
  mutt_buffer_pool_release(&hdr_list);
 
  /* instead of downloading all headers and then parsing them, we parse them
   * as they come in. */
  tempfile = mutt_buffer_pool_get();
  mutt_buffer_mktemp(tempfile);
  fp = mutt_file_fopen(mutt_buffer_string(tempfile), "w+");
  if (!fp)
  {
    mutt_error(_("Could not create temporary file %s"), mutt_buffer_string(tempfile));
    goto bail;
  }
  unlink(mutt_buffer_string(tempfile));
  mutt_buffer_pool_release(&tempfile);
 
  if (m->verbose)
  {
    progress = progress_new(_("Fetching message headers..."), MUTT_PROGRESS_READ, msn_end);
  }
 
  buf = mutt_buffer_pool_get();
 
  /* NOTE:
   *   The (fetch_msn_end < msn_end) used to be important to prevent
   *   an infinite loop, in the event the server did not return all
   *   the headers (due to a pending expunge, for example).
   *
   *   I believe the new chunking imap_fetch_msn_seqset()
   *   implementation and "msn_begin = fetch_msn_end + 1" assignment
   *   at the end of the loop makes the comparison unneeded, but to be
   *   cautious I'm keeping it.
   */
  struct ImapEmailData *edata = imap_edata_new();
  while ((fetch_msn_end < msn_end) &&
         imap_fetch_msn_seqset(buf, adata, evalhc, msn_begin, msn_end, &fetch_msn_end))
  {
    char *cmd = NULL;
    mutt_str_asprintf(&cmd, "FETCH %s (UID FLAGS INTERNALDATE RFC822.SIZE %s)",
                      mutt_buffer_string(buf), hdrreq);
    imap_cmd_start(adata, cmd);
    FREE(&cmd);
 
    int msgno = msn_begin;
 
    while (true)
    {
      rewind(fp);
      memset(&h, 0, sizeof(h));
      h.edata = edata;
 
      if (initial_download && SigInt && query_abort_header_download(adata))
      {
        goto bail;
      }
 
      const int rc = imap_cmd_step(adata);
      if (rc != IMAP_RES_CONTINUE)
      {
        if (rc != IMAP_RES_OK)
        {
          goto bail;
        }
        break;
      }
 
      switch (msg_fetch_header(m, &h, adata->buf, fp))
      {
        case 0:
          break;
        case -1:
          continue;
        case -2:
          goto bail;
      }
 
      if (!ftello(fp))
      {
        mutt_debug(LL_DEBUG2, "ignoring fetch response with no body\n");
        continue;
      }
 
      /* make sure we don't get remnants from older larger message headers */
      fputs("\n\n", fp);
 
      if ((h.edata->msn < 1) || (h.edata->msn > fetch_msn_end))
      {
        mutt_debug(LL_DEBUG1, "skipping FETCH response for unknown message number %d\n",
                   h.edata->msn);
        continue;
      }
 
      /* May receive FLAGS updates in a separate untagged response */
      if (imap_msn_get(&mdata->msn, h.edata->msn - 1))
      {
        mutt_debug(LL_DEBUG2, "skipping FETCH response for duplicate message %d\n",
                   h.edata->msn);
        continue;
      }
 
      if (m->verbose)
      {
        progress_update(progress, msgno++, -1);
      }
 
      struct Email *e = email_new();
      if (m->msg_count >= m->email_max)
      {
        mx_alloc_memory(m);
      }
 
      m->emails[m->msg_count++] = e;
 
      imap_msn_set(&mdata->msn, h.edata->msn - 1, e);
      mutt_hash_int_insert(mdata->uid_hash, h.edata->uid, e);
 
      e->index = h.edata->uid;
      /* messages which have not been expunged are ACTIVE (borrowed from mh
       * folders) */
      e->active = true;
      e->changed = false;
      e->read = h.edata->read;
      e->old = h.edata->old;
      e->deleted = h.edata->deleted;
      e->flagged = h.edata->flagged;
      e->replied = h.edata->replied;
      e->received = h.received;
      e->edata = (void *) imap_edata_clone(h.edata);
      e->edata_free = imap_edata_free;
      STAILQ_INIT(&e->tags);
 
      /* We take a copy of the tags so we can split the string */
      char *tags_copy = mutt_str_dup(h.edata->flags_remote);
      driver_tags_replace(&e->tags, tags_copy);
      FREE(&tags_copy);
 
      if (*maxuid < h.edata->uid)
        *maxuid = h.edata->uid;
 
      rewind(fp);
      /* NOTE: if Date: header is missing, mutt_rfc822_read_header depends
       *   on h.received being set */
      e->env = mutt_rfc822_read_header(fp, e, false, false);
      /* body built as a side-effect of mutt_rfc822_read_header */
      e->body->length = h.content_length;
      mailbox_size_add(m, e);
 
#ifdef USE_HCACHE
      imap_hcache_put(mdata, e);
#endif /* USE_HCACHE */
    }
 
    /* In case we get new mail while fetching the headers. */
    if (mdata->reopen & IMAP_NEWMAIL_PENDING)
    {
      msn_end = mdata->new_mail_count;
      while (msn_end > m->email_max)
        mx_alloc_memory(m);
      imap_msn_reserve(&mdata->msn, msn_end);
      mdata->reopen &= ~IMAP_NEWMAIL_PENDING;
      mdata->new_mail_count = 0;
    }
 
    /* Note: RFC3501 section 7.4.1 and RFC7162 section 3.2.10.2 say we
     * must not get any EXPUNGE/VANISHED responses in the middle of a
     * FETCH, nor when no command is in progress (e.g. between the
     * chunked FETCH commands).  We previously tried to be robust by
     * setting:
     *   msn_begin = mdata->max_msn + 1;
     * but with chunking and header cache holes this
     * may not be correct.  So here we must assume the msn values have
     * not been altered during or after the fetch.  */
    msn_begin = fetch_msn_end + 1;
  }
 
  retval = 0;
 
bail:
  mutt_buffer_pool_release(&hdr_list);
  mutt_buffer_pool_release(&buf);
  mutt_buffer_pool_release(&tempfile);
  mutt_file_fclose(&fp);
  FREE(&hdrreq);
  imap_edata_free((void **) &edata);
  progress_free(&progress);
 
  return retval;
}

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imap_read_headers()

int imap_read_headers	(	struct Mailbox *	m,
		unsigned int	msn_begin,
		unsigned int	msn_end,
		bool	initial_download
	)

Read headers from the server.

Parameters

m	Imap Selected Mailbox
msn_begin	First Message Sequence Number
msn_end	Last Message Sequence Number
initial_download	true, if this is the first opening of the mailbox

Return values

num	Last MSN
-1	Failure

Changed to read many headers instead of just one. It will return the msn of the last message read. It will return a value other than msn_end if mail comes in while downloading headers (in theory).

Definition at line 1330 of file message.c.

{
  int oldmsgcount;
  unsigned int maxuid = 0;
  int retval = -1;
  bool evalhc = false;
 
#ifdef USE_HCACHE
  uint32_t uidvalidity = 0;
  unsigned int uid_next = 0;
  unsigned long long modseq = 0;
  bool has_condstore = false;
  bool has_qresync = false;
  bool eval_condstore = false;
  bool eval_qresync = false;
  char *uid_seqset = NULL;
  const unsigned int msn_begin_save = msn_begin;
#endif /* USE_HCACHE */
 
  struct ImapAccountData *adata = imap_adata_get(m);
  struct ImapMboxData *mdata = imap_mdata_get(m);
  if (!adata || (adata->mailbox != m))
    return -1;
 
#ifdef USE_HCACHE
retry:
#endif /* USE_HCACHE */
 
  /* make sure context has room to hold the mailbox */
  while (msn_end > m->email_max)
    mx_alloc_memory(m);
  imap_msn_reserve(&mdata->msn, msn_end);
  imap_alloc_uid_hash(adata, msn_end);
 
  oldmsgcount = m->msg_count;
  mdata->reopen &= ~(IMAP_REOPEN_ALLOW | IMAP_NEWMAIL_PENDING);
  mdata->new_mail_count = 0;
 
#ifdef USE_HCACHE
  imap_hcache_open(adata, mdata);
 
  if (mdata->hcache && initial_download)
  {
    mutt_hcache_fetch_obj(mdata->hcache, "/UIDVALIDITY", 12, &uidvalidity);
    mutt_hcache_fetch_obj(mdata->hcache, "/UIDNEXT", 8, &uid_next);
    if (mdata->modseq)
    {
      const bool c_imap_condstore = cs_subset_bool(NeoMutt->sub, "imap_condstore");
      if ((adata->capabilities & IMAP_CAP_CONDSTORE) && c_imap_condstore)
        has_condstore = true;
 
      /* If IMAP_CAP_QRESYNC and ImapQResync then NeoMutt sends ENABLE QRESYNC.
       * If we receive an ENABLED response back, then adata->qresync is set.  */
      if (adata->qresync)
        has_qresync = true;
    }
 
    if (uidvalidity && uid_next && uidvalidity == mdata->uidvalidity)
    {
      evalhc = true;
      if (mutt_hcache_fetch_obj(mdata->hcache, "/MODSEQ", 7, &modseq))
      {
        if (has_qresync)
        {
          uid_seqset = imap_hcache_get_uid_seqset(mdata);
          if (uid_seqset)
            eval_qresync = true;
        }
 
        if (!eval_qresync && has_condstore)
          eval_condstore = true;
      }
    }
  }
  if (evalhc)
  {
    if (eval_qresync)
    {
      if (read_headers_qresync_eval_cache(adata, uid_seqset) < 0)
        goto bail;
    }
    else
    {
      if (read_headers_normal_eval_cache(adata, msn_end, uid_next, has_condstore || has_qresync,
                                         eval_condstore) < 0)
        goto bail;
    }
 
    if ((eval_condstore || eval_qresync) && (modseq != mdata->modseq))
    {
      if (read_headers_condstore_qresync_updates(adata, msn_end, uid_next,
                                                 modseq, eval_qresync) < 0)
      {
        goto bail;
      }
    }
 
    /* Look for the first empty MSN and start there */
    while (msn_begin <= msn_end)
    {
      if (!imap_msn_get(&mdata->msn, msn_begin - 1))
        break;
      msn_begin++;
    }
  }
#endif /* USE_HCACHE */
 
  if (read_headers_fetch_new(m, msn_begin, msn_end, evalhc, &maxuid, initial_download) < 0)
    goto bail;
 
#ifdef USE_HCACHE
  if (eval_qresync && initial_download)
  {
    if (imap_verify_qresync(m) != 0)
    {
      eval_qresync = false;
      eval_condstore = false;
      evalhc = false;
      modseq = 0;
      maxuid = 0;
      FREE(&uid_seqset);
      uidvalidity = 0;
      uid_next = 0;
      msn_begin = msn_begin_save;
 
      goto retry;
    }
  }
#endif /* USE_HCACHE */
 
  if (maxuid && (mdata->uid_next < maxuid + 1))
    mdata->uid_next = maxuid + 1;
 
#ifdef USE_HCACHE
  mutt_hcache_store_raw(mdata->hcache, "/UIDVALIDITY", 12, &mdata->uidvalidity,
                        sizeof(mdata->uidvalidity));
  if (maxuid && (mdata->uid_next < maxuid + 1))
  {
    mutt_debug(LL_DEBUG2, "Overriding UIDNEXT: %u -> %u\n", mdata->uid_next, maxuid + 1);
    mdata->uid_next = maxuid + 1;
  }
  if (mdata->uid_next > 1)
  {
    mutt_hcache_store_raw(mdata->hcache, "/UIDNEXT", 8, &mdata->uid_next,
                          sizeof(mdata->uid_next));
  }
 
  /* We currently only sync CONDSTORE and QRESYNC on the initial download.
   * To do it more often, we'll need to deal with flag updates combined with
   * unsync'ed local flag changes.  We'll also need to properly sync flags to
   * the header cache on close.  I'm not sure it's worth the added complexity.  */
  if (initial_download)
  {
    if (has_condstore || has_qresync)
    {
      mutt_hcache_store_raw(mdata->hcache, "/MODSEQ", 7, &mdata->modseq,
                            sizeof(mdata->modseq));
    }
    else
    {
      mutt_hcache_delete_record(mdata->hcache, "/MODSEQ", 7);
    }
 
    if (has_qresync)
      imap_hcache_store_uid_seqset(mdata);
    else
      imap_hcache_clear_uid_seqset(mdata);
  }
#endif /* USE_HCACHE */
 
  if (m->msg_count > oldmsgcount)
  {
    /* TODO: it's not clear to me why we are calling mx_alloc_memory
     *       yet again. */
    mx_alloc_memory(m);
  }
 
  mdata->reopen |= IMAP_REOPEN_ALLOW;
 
  retval = msn_end;
 
bail:
#ifdef USE_HCACHE
  imap_hcache_close(mdata);
  FREE(&uid_seqset);
#endif /* USE_HCACHE */
 
  return retval;
}

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imap_append_message()

int imap_append_message	(	struct Mailbox *	m,
		struct Message *	msg
	)

Write an email back to the server.

Parameters

m	Mailbox
msg	Message to save

Return values

0	Success
-1	Failure

Definition at line 1528 of file message.c.

{
  if (!m || !msg)
    return -1;
 
  FILE *fp = NULL;
  char buf[1024 * 2];
  char internaldate[IMAP_DATELEN] = { 0 };
  char imap_flags[128] = { 0 };
  size_t len;
  struct Progress *progress = NULL;
  size_t sent;
  int c, last;
  int rc;
 
  struct ImapAccountData *adata = imap_adata_get(m);
  struct ImapMboxData *mdata = imap_mdata_get(m);
 
  fp = fopen(msg->path, "r");
  if (!fp)
  {
    mutt_perror(msg->path);
    goto fail;
  }
 
  /* currently we set the \Seen flag on all messages, but probably we
   * should scan the message Status header for flag info. Since we're
   * already rereading the whole file for length it isn't any more
   * expensive (it'd be nice if we had the file size passed in already
   * by the code that writes the file, but that's a lot of changes.
   * Ideally we'd have an Email structure with flag info here... */
  for (last = EOF, len = 0; (c = fgetc(fp)) != EOF; last = c)
  {
    if ((c == '\n') && (last != '\r'))
      len++;
 
    len++;
  }
  rewind(fp);
 
  if (m->verbose)
    progress = progress_new(_("Uploading message..."), MUTT_PROGRESS_NET, len);
 
  mutt_date_make_imap(internaldate, sizeof(internaldate), msg->received);
 
  imap_flags[0] = '\0';
  imap_flags[1] = '\0';
 
  if (msg->flags.read)
    mutt_str_cat(imap_flags, sizeof(imap_flags), " \\Seen");
  if (msg->flags.replied)
    mutt_str_cat(imap_flags, sizeof(imap_flags), " \\Answered");
  if (msg->flags.flagged)
    mutt_str_cat(imap_flags, sizeof(imap_flags), " \\Flagged");
  if (msg->flags.draft)
    mutt_str_cat(imap_flags, sizeof(imap_flags), " \\Draft");
 
  snprintf(buf, sizeof(buf), "APPEND %s (%s) \"%s\" {%lu}", mdata->munge_name,
           imap_flags + 1, internaldate, (unsigned long) len);
 
  imap_cmd_start(adata, buf);
 
  do
  {
    rc = imap_cmd_step(adata);
  } while (rc == IMAP_RES_CONTINUE);
 
  if (rc != IMAP_RES_RESPOND)
    goto cmd_step_fail;
 
  for (last = EOF, sent = len = 0; (c = fgetc(fp)) != EOF; last = c)
  {
    if ((c == '\n') && (last != '\r'))
      buf[len++] = '\r';
 
    buf[len++] = c;
 
    if (len > sizeof(buf) - 3)
    {
      sent += len;
      if (flush_buffer(buf, &len, adata->conn) < 0)
        goto fail;
      if (m->verbose)
        progress_update(progress, sent, -1);
    }
  }
 
  if (len)
    if (flush_buffer(buf, &len, adata->conn) < 0)
      goto fail;
 
  if (mutt_socket_send(adata->conn, "\r\n") < 0)
    goto fail;
  mutt_file_fclose(&fp);
 
  do
  {
    rc = imap_cmd_step(adata);
  } while (rc == IMAP_RES_CONTINUE);
 
  if (rc != IMAP_RES_OK)
    goto cmd_step_fail;
 
  progress_free(&progress);
  return 0;
 
cmd_step_fail:
  mutt_debug(LL_DEBUG1, "command failed: %s\n", adata->buf);
  if (rc != IMAP_RES_BAD)
  {
    char *pc = imap_next_word(adata->buf); /* skip sequence number or token */
    pc = imap_next_word(pc);               /* skip response code */
    if (*pc != '\0')
      mutt_error("%s", pc);
  }
 
fail:
  mutt_file_fclose(&fp);
  progress_free(&progress);
  return -1;
}

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imap_copy_messages()

int imap_copy_messages	(	struct Mailbox *	m,
		struct EmailList *	el,
		const char *	dest,
		enum MessageSaveOpt	save_opt
	)

Server COPY messages to another folder.

Parameters

m	Mailbox
el	List of Emails to copy
dest	Destination folder
save_opt	Copy or move, e.g. SAVE_MOVE

Return values

-1	Error
0	Success
1	Non-fatal error - try fetch/append

Definition at line 1660 of file message.c.

{
  if (!m || !el || !dest)
    return -1;
 
  struct Buffer cmd, sync_cmd;
  char buf[PATH_MAX] = { 0 };
  char mbox[PATH_MAX] = { 0 };
  char mmbox[PATH_MAX] = { 0 };
  char prompt[PATH_MAX + 64];
  int rc;
  struct ConnAccount cac = { { 0 } };
  enum QuadOption err_continue = MUTT_NO;
  int triedcreate = 0;
  struct EmailNode *en = STAILQ_FIRST(el);
  bool single = !STAILQ_NEXT(en, entries);
  struct ImapAccountData *adata = imap_adata_get(m);
 
  if (single && en->email->attach_del)
  {
    mutt_debug(LL_DEBUG3, "#1 Message contains attachments to be deleted\n");
    return 1;
  }
 
  if (imap_parse_path(dest, &cac, buf, sizeof(buf)))
  {
    mutt_debug(LL_DEBUG1, "bad destination %s\n", dest);
    return -1;
  }
 
  /* check that the save-to folder is in the same account */
  if (!imap_account_match(&adata->conn->account, &cac))
  {
    mutt_debug(LL_DEBUG3, "%s not same server as %s\n", dest, mailbox_path(m));
    return 1;
  }
 
  imap_fix_path(adata->delim, buf, mbox, sizeof(mbox));
  if (*mbox == '\0')
    mutt_str_copy(mbox, "INBOX", sizeof(mbox));
  imap_munge_mbox_name(adata->unicode, mmbox, sizeof(mmbox), mbox);
 
  /* loop in case of TRYCREATE */
  do
  {
    mutt_buffer_init(&sync_cmd);
    mutt_buffer_init(&cmd);
 
    if (!single) /* copy tagged messages */
    {
      /* if any messages have attachments to delete, fall through to FETCH
       * and APPEND. TODO: Copy what we can with COPY, fall through for the
       * remainder. */
      STAILQ_FOREACH(en, el, entries)
      {
        if (en->email->attach_del)
        {
          mutt_debug(LL_DEBUG3, "#2 Message contains attachments to be deleted\n");
          return 1;
        }
 
        if (en->email->active && en->email->changed)
        {
          rc = imap_sync_message_for_copy(m, en->email, &sync_cmd, &err_continue);
          if (rc < 0)
          {
            mutt_debug(LL_DEBUG1, "#1 could not sync\n");
            goto out;
          }
        }
      }
 
      rc = imap_exec_msgset(m, "UID COPY", mmbox, MUTT_TAG, false, false);
      if (rc == 0)
      {
        mutt_debug(LL_DEBUG1, "No messages tagged\n");
        rc = -1;
        goto out;
      }
      else if (rc < 0)
      {
        mutt_debug(LL_DEBUG1, "#1 could not queue copy\n");
        goto out;
      }
      else
      {
        mutt_message(ngettext("Copying %d message to %s...", "Copying %d messages to %s...", rc),
                     rc, mbox);
      }
    }
    else
    {
      mutt_message(_("Copying message %d to %s..."), en->email->index + 1, mbox);
      mutt_buffer_add_printf(&cmd, "UID COPY %u %s", imap_edata_get(en->email)->uid, mmbox);
 
      if (en->email->active && en->email->changed)
      {
        rc = imap_sync_message_for_copy(m, en->email, &sync_cmd, &err_continue);
        if (rc < 0)
        {
          mutt_debug(LL_DEBUG1, "#2 could not sync\n");
          goto out;
        }
      }
      rc = imap_exec(adata, cmd.data, IMAP_CMD_QUEUE);
      if (rc != IMAP_EXEC_SUCCESS)
      {
        mutt_debug(LL_DEBUG1, "#2 could not queue copy\n");
        goto out;
      }
    }
 
    /* let's get it on */
    rc = imap_exec(adata, NULL, IMAP_CMD_NO_FLAGS);
    if (rc == IMAP_EXEC_ERROR)
    {
      if (triedcreate)
      {
        mutt_debug(LL_DEBUG1, "Already tried to create mailbox %s\n", mbox);
        break;
      }
      /* bail out if command failed for reasons other than nonexistent target */
      if (!mutt_istr_startswith(imap_get_qualifier(adata->buf), "[TRYCREATE]"))
        break;
      mutt_debug(LL_DEBUG3, "server suggests TRYCREATE\n");
      snprintf(prompt, sizeof(prompt), _("Create %s?"), mbox);
      const bool c_confirm_create = cs_subset_bool(NeoMutt->sub, "confirm_create");
      if (c_confirm_create && (mutt_yesorno(prompt, MUTT_YES) != MUTT_YES))
      {
        mutt_clear_error();
        goto out;
      }
      if (imap_create_mailbox(adata, mbox) < 0)
        break;
      triedcreate = 1;
    }
  } while (rc == IMAP_EXEC_ERROR);
 
  if (rc != 0)
  {
    imap_error("imap_copy_messages", adata->buf);
    goto out;
  }
 
  /* cleanup */
  if (save_opt == SAVE_MOVE)
  {
    const bool c_delete_untag = cs_subset_bool(NeoMutt->sub, "delete_untag");
    STAILQ_FOREACH(en, el, entries)
    {
      mutt_set_flag(m, en->email, MUTT_DELETE, true);
      mutt_set_flag(m, en->email, MUTT_PURGE, true);
      if (c_delete_untag)
        mutt_set_flag(m, en->email, MUTT_TAG, false);
    }
  }
 
  rc = 0;
 
out:
  FREE(&cmd.data);
  FREE(&sync_cmd.data);
 
  return (rc < 0) ? -1 : rc;
}

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imap_cache_del()

int imap_cache_del	(	struct Mailbox *	m,
		struct Email *	e
	)

Delete an email from the body cache.

Parameters

m	Selected Imap Mailbox
e	Email

Return values

0	Success
-1	Failure

Definition at line 1834 of file message.c.

{
  struct ImapAccountData *adata = imap_adata_get(m);
  struct ImapMboxData *mdata = imap_mdata_get(m);
 
  if (!e || !adata || (adata->mailbox != m))
    return -1;
 
  mdata->bcache = msg_cache_open(m);
  char id[64] = { 0 };
  snprintf(id, sizeof(id), "%u-%u", mdata->uidvalidity, imap_edata_get(e)->uid);
  return mutt_bcache_del(mdata->bcache, id);
}

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imap_cache_clean()

int imap_cache_clean

(

struct Mailbox *

m

)

Delete all the entries in the message cache.

Parameters

m	SelectedImap Mailbox

Return values

0

Always

Definition at line 1853 of file message.c.

{
  struct ImapAccountData *adata = imap_adata_get(m);
  struct ImapMboxData *mdata = imap_mdata_get(m);
 
  if (!adata || (adata->mailbox != m))
    return -1;
 
  mdata->bcache = msg_cache_open(m);
  mutt_bcache_list(mdata->bcache, msg_cache_clean_cb, mdata);
 
  return 0;
}

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imap_set_flags()

char * imap_set_flags	(	struct Mailbox *	m,
		struct Email *	e,
		char *	s,
		bool *	server_changes
	)

Fill the message header according to the server flags.

Parameters

[in]	m	Imap Selected Mailbox
[in]	e	Email
[in]	s	Command string
[out]	server_changes	Set to true if the flags have changed

Return values

ptr	The end of flags string
NULL	Failure

Expects a flags line of the form "FLAGS (flag flag ...)"

imap_set_flags: fill out the message header according to the flags from the server. Expects a flags line of the form "FLAGS (flag flag ...)"

Sets server_changes to 1 if a change to a flag is made, or in the case of e->changed, if a change to a flag would have been made.

Definition at line 1885 of file message.c.

{
  struct ImapAccountData *adata = imap_adata_get(m);
  if (!adata || (adata->mailbox != m))
    return NULL;
 
  struct ImapHeader newh = { 0 };
  struct ImapEmailData old_edata = { 0 };
  int local_changes = e->changed;
 
  struct ImapEmailData *edata = e->edata;
  newh.edata = edata;
 
  mutt_debug(LL_DEBUG2, "parsing FLAGS\n");
  s = msg_parse_flags(&newh, s);
  if (!s)
    return NULL;
 
  /* Update tags system */
  /* We take a copy of the tags so we can split the string */
  char *tags_copy = mutt_str_dup(edata->flags_remote);
  driver_tags_replace(&e->tags, tags_copy);
  FREE(&tags_copy);
 
  /* YAUH (yet another ugly hack): temporarily set context to
   * read-write even if it's read-only, so *server* updates of
   * flags can be processed by mutt_set_flag. mailbox->changed must
   * be restored afterwards */
  bool readonly = m->readonly;
  m->readonly = false;
 
  /* This is redundant with the following two checks. Removing:
   * mutt_set_flag (m, e, MUTT_NEW, !(edata->read || edata->old)); */
  set_changed_flag(m, e, local_changes, server_changes, MUTT_OLD, old_edata.old,
                   edata->old, e->old);
  set_changed_flag(m, e, local_changes, server_changes, MUTT_READ,
                   old_edata.read, edata->read, e->read);
  set_changed_flag(m, e, local_changes, server_changes, MUTT_DELETE,
                   old_edata.deleted, edata->deleted, e->deleted);
  set_changed_flag(m, e, local_changes, server_changes, MUTT_FLAG,
                   old_edata.flagged, edata->flagged, e->flagged);
  set_changed_flag(m, e, local_changes, server_changes, MUTT_REPLIED,
                   old_edata.replied, edata->replied, e->replied);
 
  /* this message is now definitively *not* changed (mutt_set_flag
   * marks things changed as a side-effect) */
  if (local_changes == 0)
    e->changed = false;
  m->changed &= !readonly;
  m->readonly = readonly;
 
  return s;
}

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