util.c File Reference

IMAP helper functions. More...

#include "config.h"
#include <arpa/inet.h>
#include <errno.h>
#include <netdb.h>
#include <signal.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/wait.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 "lib.h"
#include "bcache/lib.h"
#include "question/lib.h"
#include "store/lib.h"
#include "adata.h"
#include "edata.h"
#include "globals.h"
#include "mdata.h"
#include "msn.h"
#include "hcache/lib.h"

Include dependency graph for util.c:

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Functions
int	imap_adata_find (const char *path, struct ImapAccountData **adata, struct ImapMboxData **mdata)
	Find the Account data for this path.
void	imap_mdata_cache_reset (struct ImapMboxData *mdata)
	Release and clear cache data of ImapMboxData structure.
void	imap_get_parent (const char *mbox, char delim, char *buf, size_t buflen)
	Get an IMAP folder's parent.
void	imap_get_parent_path (const char *path, char *buf, size_t buflen)
	Get the path of the parent folder.
void	imap_clean_path (char *path, size_t plen)
	Cleans an IMAP path using imap_fix_path.
static const char *	imap_get_field (enum ConnAccountField field, void *gf_data)
	Get connection login credentials - Implements ConnAccount::get_field() -.
static void	imap_msn_index_to_uid_seqset (struct Buffer *buf, struct ImapMboxData *mdata)
	Convert MSN index of UIDs to Seqset.
static void	imap_hcache_namer (const struct StoreOps *store_ops, const char *path, struct Buffer *dest)
	Generate a filename for the header cache - Implements hcache_namer_t -.
void	imap_hcache_open (struct ImapAccountData *adata, struct ImapMboxData *mdata, bool create)
	Open a header cache.
void	imap_hcache_close (struct ImapMboxData *mdata)
	Close the header cache.
struct Email *	imap_hcache_get (struct ImapMboxData *mdata, unsigned int uid)
	Get a header cache entry by its UID.
int	imap_hcache_put (struct ImapMboxData *mdata, struct Email *e)
	Add an entry to the header cache.
int	imap_hcache_del (struct ImapMboxData *mdata, unsigned int uid)
	Delete an item from the header cache.
int	imap_hcache_store_uid_seqset (struct ImapMboxData *mdata)
	Store a UID Sequence Set in the header cache.
int	imap_hcache_clear_uid_seqset (struct ImapMboxData *mdata)
	Delete a UID Sequence Set from the header cache.
char *	imap_hcache_get_uid_seqset (struct ImapMboxData *mdata)
	Get a UID Sequence Set from the header cache.
int	imap_parse_path (const char *path, struct ConnAccount *cac, char *mailbox, size_t mailboxlen)
	Parse an IMAP mailbox name into ConnAccount, name.
int	imap_mxcmp (const char *mx1, const char *mx2)
	Compare mailbox names, giving priority to INBOX.
void	imap_pretty_mailbox (char *path, size_t pathlen, const char *folder)
	Prettify an IMAP mailbox name.
enum QuadOption	imap_continue (const char *msg, const char *resp)
	Display a message and ask the user if they want to go on.
void	imap_error (const char *where, const char *msg)
	Show an error and abort.
char *	imap_fix_path (const char *mailbox, char *path, size_t plen)
	Fix up the imap path.
char *	imap_fix_path_with_delim (const char delim, const char *mailbox, char *path, size_t plen)
	Fix up the imap path.
void	imap_cachepath (char delim, const char *mailbox, struct Buffer *dest)
	Generate a cache path for a mailbox.
int	imap_get_literal_count (char *buf, unsigned int *bytes)
	Write number of bytes in an IMAP literal into bytes.
char *	imap_get_qualifier (char *buf)
	Get the qualifier from a tagged response.
char *	imap_next_word (char *s)
	Find where the next IMAP word begins.
void	imap_qualify_path (char *buf, size_t buflen, struct ConnAccount *cac, char *path)
	Make an absolute IMAP folder target.
void	imap_buf_qualify_path (struct Buffer *buf, struct ConnAccount *cac, char *path)
	Make an absolute IMAP folder target to a buffer.
void	imap_quote_string (char *dest, size_t dlen, const char *src, bool quote_backtick)
	Quote string according to IMAP rules.
void	imap_unquote_string (char *s)
	Equally stupid unquoting routine.
void	imap_munge_mbox_name (bool unicode, char *dest, size_t dlen, const char *src)
	Quote awkward characters in a mailbox name.
void	imap_unmunge_mbox_name (bool unicode, char *s)
	Remove quoting from a mailbox name.
void	imap_keep_alive (void)
	Poll the current folder to keep the connection alive.
int	imap_wait_keep_alive (pid_t pid)
	Wait for a process to change state.
void	imap_allow_reopen (struct Mailbox *m)
	Allow re-opening a folder upon expunge.
void	imap_disallow_reopen (struct Mailbox *m)
	Disallow re-opening a folder upon expunge.
bool	imap_account_match (const struct ConnAccount *a1, const struct ConnAccount *a2)
	Compare two Accounts.
struct SeqsetIterator *	mutt_seqset_iterator_new (const char *seqset)
	Create a new Sequence Set Iterator.
int	mutt_seqset_iterator_next (struct SeqsetIterator *iter, unsigned int *next)
	Get the next UID from a Sequence Set.
void	mutt_seqset_iterator_free (struct SeqsetIterator **ptr)
	Free a Sequence Set Iterator.

Detailed Description

IMAP helper functions.

Authors

• Michael R. Elkins
• Brandon Long
• Brendan Cully
• Richard Russon
• Mehdi Abaakouk
• Pietro Cerutti
• Thomas Klausner

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 util.c.

Function Documentation

imap_adata_find()

int imap_adata_find	(	const char *	path,
		struct ImapAccountData **	adata,
		struct ImapMboxData **	mdata )

Find the Account data for this path.

Parameters

path	Path to search for
adata	Imap Account data
mdata	Imap Mailbox data

Return values

0	Success
-1	Failure

Definition at line 73 of file util.c.

{
  struct ConnAccount cac = { { 0 } };
  struct ImapAccountData *tmp_adata = NULL;
  char tmp[1024] = { 0 };
 
  if (imap_parse_path(path, &cac, tmp, sizeof(tmp)) < 0)
    return -1;
 
  struct Account **ap = NULL;
  ARRAY_FOREACH(ap, &NeoMutt->accounts)
  {
    struct Account *a = *ap;
    if (a->type != MUTT_IMAP)
      continue;
 
    tmp_adata = a->adata;
    if (!tmp_adata)
      continue;
    if (imap_account_match(&tmp_adata->conn->account, &cac))
    {
      if (mdata)
      {
        *mdata = imap_mdata_new(tmp_adata, tmp);
      }
      *adata = tmp_adata;
      return 0;
    }
  }
  mutt_debug(LL_DEBUG3, "no ImapAccountData found\n");
  return -1;
}

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imap_mdata_cache_reset()

void imap_mdata_cache_reset

(

struct ImapMboxData *

mdata

)

Release and clear cache data of ImapMboxData structure.

Parameters

mdata

Imap Mailbox data

Definition at line 111 of file util.c.

{
  mdata->check_status = IMAP_OPEN_NONE;
  mdata->reopen = IMAP_OPEN_NONE;
  mutt_hash_free(&mdata->uid_hash);
  imap_msn_free(&mdata->msn);
  mutt_bcache_close(&mdata->bcache);
}

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imap_get_parent()

void imap_get_parent	(	const char *	mbox,
		char	delim,
		char *	buf,
		size_t	buflen )

Get an IMAP folder's parent.

Parameters

mbox	Mailbox whose parent is to be determined
delim	Path delimiter
buf	Buffer for the result
buflen	Length of the buffer

Definition at line 127 of file util.c.

{
  /* Make a copy of the mailbox name, but only if the pointers are different */
  if (mbox != buf)
    mutt_str_copy(buf, mbox, buflen);
 
  int n = mutt_str_len(buf);
 
  /* Let's go backwards until the next delimiter
   *
   * If buf[n] is a '/', the first n-- will allow us
   * to ignore it. If it isn't, then buf looks like
   * "/aaaaa/bbbb". There is at least one "b", so we can't skip
   * the "/" after the 'a's.
   *
   * If buf == '/', then n-- => n == 0, so the loop ends
   * immediately */
  for (n--; (n >= 0) && (buf[n] != delim); n--)
    ; // do nothing
 
  /* We stopped before the beginning. There is a trailing slash.  */
  if (n > 0)
  {
    /* Strip the trailing delimiter.  */
    buf[n] = '\0';
  }
  else
  {
    buf[0] = (n == 0) ? delim : '\0';
  }
}

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imap_get_parent_path()

void imap_get_parent_path	(	const char *	path,
		char *	buf,
		size_t	buflen )

Get the path of the parent folder.

Parameters

path	Mailbox whose parent is to be determined
buf	Buffer for the result
buflen	Length of the buffer

Provided an imap path, returns in buf the parent directory if existent. Else returns the same path.

Definition at line 168 of file util.c.

{
  struct ImapAccountData *adata = NULL;
  struct ImapMboxData *mdata = NULL;
  char mbox[1024] = { 0 };
 
  if (imap_adata_find(path, &adata, &mdata) < 0)
  {
    mutt_str_copy(buf, path, buflen);
    return;
  }
 
  /* Gets the parent mbox in mbox */
  imap_get_parent(mdata->name, adata->delim, mbox, sizeof(mbox));
 
  /* Returns a fully qualified IMAP url */
  imap_qualify_path(buf, buflen, &adata->conn->account, mbox);
  imap_mdata_free((void *) &mdata);
}

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imap_clean_path()

void imap_clean_path	(	char *	path,
		size_t	plen )

Cleans an IMAP path using imap_fix_path.

Parameters

path	Path to be cleaned
plen	Length of the buffer

Does it in place.

Definition at line 195 of file util.c.

{
  struct ImapAccountData *adata = NULL;
  struct ImapMboxData *mdata = NULL;
 
  if (imap_adata_find(path, &adata, &mdata) < 0)
    return;
 
  /* Returns a fully qualified IMAP url */
  imap_qualify_path(path, plen, &adata->conn->account, mdata->name);
  imap_mdata_free((void *) &mdata);
}

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imap_msn_index_to_uid_seqset()

static void imap_msn_index_to_uid_seqset ( struct Buffer * buf, struct ImapMboxData * mdata )

static

Convert MSN index of UIDs to Seqset.

Parameters

buf	Buffer for the result
mdata	Imap Mailbox data

Generates a seqseq of the UIDs in msn_index to persist in the header cache. Empty spots are stored as 0.

Definition at line 238 of file util.c.

{
  int first = 1;
  int state = 0;
  unsigned int cur_uid = 0;
  unsigned int last_uid = 0;
  unsigned int range_begin = 0;
  unsigned int range_end = 0;
  const size_t max_msn = imap_msn_highest(&mdata->msn);
 
  for (unsigned int msn = 1; msn <= max_msn + 1; msn++)
  {
    bool match = false;
    if (msn <= max_msn)
    {
      struct Email *e_cur = imap_msn_get(&mdata->msn, msn - 1);
      cur_uid = e_cur ? imap_edata_get(e_cur)->uid : 0;
      if (!state || (cur_uid && ((cur_uid - 1) == last_uid)))
        match = true;
      last_uid = cur_uid;
    }
 
    if (match)
    {
      switch (state)
      {
        case 1: /* single: convert to a range */
          state = 2;
          FALLTHROUGH;
 
        case 2: /* extend range ending */
          range_end = cur_uid;
          break;
        default:
          state = 1;
          range_begin = cur_uid;
          break;
      }
    }
    else if (state)
    {
      if (first)
        first = 0;
      else
        buf_addch(buf, ',');
 
      if (state == 1)
        buf_add_printf(buf, "%u", range_begin);
      else if (state == 2)
        buf_add_printf(buf, "%u:%u", range_begin, range_end);
 
      state = 1;
      range_begin = cur_uid;
    }
  }
}

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imap_hcache_open()

void imap_hcache_open	(	struct ImapAccountData *	adata,
		struct ImapMboxData *	mdata,
		bool	create )

Open a header cache.

Parameters

adata	Imap Account data
mdata	Imap Mailbox data
create	Create a new header cache if missing?

Definition at line 310 of file util.c.

{
  if (!adata || !mdata)
    return;
 
  if (mdata->hcache)
    return;
 
  struct HeaderCache *hc = NULL;
  struct Buffer *mbox = buf_pool_get();
  struct Buffer *cachepath = buf_pool_get();
 
  imap_cachepath(adata->delim, mdata->name, mbox);
 
  if (strstr(buf_string(mbox), "/../") || mutt_str_equal(buf_string(mbox), "..") ||
      mutt_strn_equal(buf_string(mbox), "../", 3))
  {
    goto cleanup;
  }
  size_t len = buf_len(mbox);
  if ((len > 3) && (mutt_str_equal(buf_string(mbox) + len - 3, "/..")))
    goto cleanup;
 
  struct Url url = { 0 };
  account_to_url(&adata->conn->account, &url);
  url.path = mbox->data;
  url_tobuffer(&url, cachepath, U_PATH);
 
  const char *const c_header_cache = cs_subset_path(NeoMutt->sub, "header_cache");
  hc = hcache_open(c_header_cache, buf_string(cachepath), imap_hcache_namer, create);
 
cleanup:
  buf_pool_release(&mbox);
  buf_pool_release(&cachepath);
  mdata->hcache = hc;
}

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imap_hcache_close()

void imap_hcache_close

(

struct ImapMboxData *

mdata

)

Close the header cache.

Parameters

mdata

Imap Mailbox data

Definition at line 351 of file util.c.

{
  if (!mdata->hcache)
    return;
 
  hcache_close(&mdata->hcache);
}

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imap_hcache_get()

struct Email * imap_hcache_get	(	struct ImapMboxData *	mdata,
		unsigned int	uid )

Get a header cache entry by its UID.

Parameters

mdata	Imap Mailbox data
uid	UID to find

Return values

ptr	Email
NULL	Failure

Definition at line 366 of file util.c.

{
  if (!mdata->hcache)
    return NULL;
 
  char key[16] = { 0 };
 
  snprintf(key, sizeof(key), "%u", uid);
  struct HCacheEntry hce = hcache_fetch_email(mdata->hcache, key, mutt_str_len(key),
                                              mdata->uidvalidity);
  if (!hce.email && hce.uidvalidity)
  {
    mutt_debug(LL_DEBUG3, "hcache uidvalidity mismatch: %u\n", hce.uidvalidity);
  }
 
  return hce.email;
}

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imap_hcache_put()

int imap_hcache_put	(	struct ImapMboxData *	mdata,
		struct Email *	e )

Add an entry to the header cache.

Parameters

mdata	Imap Mailbox data
e	Email

Return values

0	Success
-1	Failure

Definition at line 391 of file util.c.

{
  if (!mdata->hcache)
    return -1;
 
  char key[16] = { 0 };
 
  snprintf(key, sizeof(key), "%u", imap_edata_get(e)->uid);
  return hcache_store_email(mdata->hcache, key, mutt_str_len(key), e, mdata->uidvalidity);
}

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imap_hcache_del()

int imap_hcache_del	(	struct ImapMboxData *	mdata,
		unsigned int	uid )

Delete an item from the header cache.

Parameters

mdata	Imap Mailbox data
uid	UID of entry to delete

Return values

0	Success
-1	Failure

Definition at line 409 of file util.c.

{
  if (!mdata->hcache)
    return -1;
 
  char key[16] = { 0 };
 
  snprintf(key, sizeof(key), "%u", uid);
  return hcache_delete_email(mdata->hcache, key, mutt_str_len(key));
}

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imap_hcache_store_uid_seqset()

int imap_hcache_store_uid_seqset

(

struct ImapMboxData *

mdata

)

Store a UID Sequence Set in the header cache.

Parameters

mdata

Imap Mailbox data

Return values

0	Success
-1	Error

Definition at line 426 of file util.c.

{
  if (!mdata->hcache)
    return -1;
 
  struct Buffer *buf = buf_pool_get();
  buf_alloc(buf, 8192); // The seqset is likely large.  Preallocate to reduce reallocs
  imap_msn_index_to_uid_seqset(buf, mdata);
 
  int rc = hcache_store_raw(mdata->hcache, "UIDSEQSET", 9, buf->data, buf_len(buf) + 1);
  mutt_debug(LL_DEBUG3, "Stored UIDSEQSET %s\n", buf_string(buf));
  buf_pool_release(&buf);
  return rc;
}

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imap_hcache_clear_uid_seqset()

int imap_hcache_clear_uid_seqset

(

struct ImapMboxData *

mdata

)

Delete a UID Sequence Set from the header cache.

Parameters

mdata

Imap Mailbox data

Return values

0	Success
-1	Error

Definition at line 447 of file util.c.

{
  if (!mdata->hcache)
    return -1;
 
  return hcache_delete_raw(mdata->hcache, "UIDSEQSET", 9);
}

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imap_hcache_get_uid_seqset()

char * imap_hcache_get_uid_seqset

(

struct ImapMboxData *

mdata

)

Get a UID Sequence Set from the header cache.

Parameters

mdata

Imap Mailbox data

Return values

ptr	UID Sequence Set
NULL	Error

Definition at line 461 of file util.c.

{
  if (!mdata->hcache)
    return NULL;
 
  char *seqset = hcache_fetch_raw_str(mdata->hcache, "UIDSEQSET", 9);
  mutt_debug(LL_DEBUG3, "Retrieved UIDSEQSET %s\n", NONULL(seqset));
 
  return seqset;
}

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imap_parse_path()

int imap_parse_path	(	const char *	path,
		struct ConnAccount *	cac,
		char *	mailbox,
		size_t	mailboxlen )

Parse an IMAP mailbox name into ConnAccount, name.

Parameters

path	Mailbox path to parse
cac	Account credentials
mailbox	Buffer for mailbox name
mailboxlen	Length of buffer

Return values

0	Success
-1	Failure

Given an IMAP mailbox name, return host, port and a path IMAP servers will recognize.

Definition at line 485 of file util.c.

{
  static unsigned short ImapPort = 0;
  static unsigned short ImapsPort = 0;
 
  if (ImapPort == 0)
  {
    struct servent *service = getservbyname("imap", "tcp");
    if (service)
      ImapPort = ntohs(service->s_port);
    else
      ImapPort = IMAP_PORT;
    mutt_debug(LL_DEBUG3, "Using default IMAP port %d\n", ImapPort);
  }
 
  if (ImapsPort == 0)
  {
    struct servent *service = getservbyname("imaps", "tcp");
    if (service)
      ImapsPort = ntohs(service->s_port);
    else
      ImapsPort = IMAP_SSL_PORT;
    mutt_debug(LL_DEBUG3, "Using default IMAPS port %d\n", ImapsPort);
  }
 
  /* Defaults */
  cac->port = ImapPort;
  cac->type = MUTT_ACCT_TYPE_IMAP;
  cac->service = "imap";
  cac->get_field = imap_get_field;
 
  struct Url *url = url_parse(path);
  if (!url)
    return -1;
 
  if ((url->scheme != U_IMAP) && (url->scheme != U_IMAPS))
  {
    url_free(&url);
    return -1;
  }
 
  if ((account_from_url(cac, url) < 0) || (cac->host[0] == '\0'))
  {
    url_free(&url);
    return -1;
  }
 
  if (url->scheme == U_IMAPS)
    cac->flags |= MUTT_ACCT_SSL;
 
  mutt_str_copy(mailbox, url->path, mailboxlen);
 
  url_free(&url);
 
  if ((cac->flags & MUTT_ACCT_SSL) && !(cac->flags & MUTT_ACCT_PORT))
    cac->port = ImapsPort;
 
  return 0;
}

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imap_mxcmp()

int imap_mxcmp	(	const char *	mx1,
		const char *	mx2 )

Compare mailbox names, giving priority to INBOX.

Parameters

mx1	First mailbox name
mx2	Second mailbox name

Return values

<0	First mailbox precedes Second mailbox
0	Mailboxes are the same
>0	Second mailbox precedes First mailbox

Like a normal sort function except that "INBOX" will be sorted to the beginning of the list.

Definition at line 556 of file util.c.

{
  char *b1 = NULL;
  char *b2 = NULL;
  int rc;
 
  if (!mx1 || (*mx1 == '\0'))
    mx1 = "INBOX";
  if (!mx2 || (*mx2 == '\0'))
    mx2 = "INBOX";
  if (mutt_istr_equal(mx1, "INBOX") && mutt_istr_equal(mx2, "INBOX"))
  {
    return 0;
  }
 
  b1 = MUTT_MEM_MALLOC(strlen(mx1) + 1, char);
  b2 = MUTT_MEM_MALLOC(strlen(mx2) + 1, char);
 
  imap_fix_path(mx1, b1, strlen(mx1) + 1);
  imap_fix_path(mx2, b2, strlen(mx2) + 1);
 
  rc = mutt_str_cmp(b1, b2);
  FREE(&b1);
  FREE(&b2);
 
  return rc;
}

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imap_pretty_mailbox()

void imap_pretty_mailbox	(	char *	path,
		size_t	pathlen,
		const char *	folder )

Prettify an IMAP mailbox name.

Parameters

path	Mailbox name to be tidied
pathlen	Length of path
folder	Path to use for '+' abbreviations

Called by mutt_pretty_mailbox() to make IMAP paths look nice.

Definition at line 592 of file util.c.

{
  struct ConnAccount cac_target = { { 0 } };
  struct ConnAccount cac_home = { { 0 } };
  struct Url url = { 0 };
  const char *delim = NULL;
  int tlen;
  int hlen = 0;
  bool home_match = false;
  char target_mailbox[1024] = { 0 };
  char home_mailbox[1024] = { 0 };
 
  if (imap_parse_path(path, &cac_target, target_mailbox, sizeof(target_mailbox)) < 0)
    return;
 
  if (imap_path_probe(folder, NULL) != MUTT_IMAP)
    goto fallback;
 
  if (imap_parse_path(folder, &cac_home, home_mailbox, sizeof(home_mailbox)) < 0)
    goto fallback;
 
  tlen = mutt_str_len(target_mailbox);
  hlen = mutt_str_len(home_mailbox);
 
  /* check whether we can do '+' substitution */
  if (tlen && imap_account_match(&cac_home, &cac_target) &&
      mutt_strn_equal(home_mailbox, target_mailbox, hlen))
  {
    const char *const c_imap_delim_chars = cs_subset_string(NeoMutt->sub, "imap_delim_chars");
    if (hlen == 0)
    {
      home_match = true;
    }
    else if (c_imap_delim_chars)
    {
      for (delim = c_imap_delim_chars; *delim != '\0'; delim++)
        if (target_mailbox[hlen] == *delim)
          home_match = true;
    }
  }
 
  /* do the '+' substitution */
  if (home_match)
  {
    *path++ = '+';
    /* copy remaining path, skipping delimiter */
    if (hlen != 0)
      hlen++;
    memcpy(path, target_mailbox + hlen, tlen - hlen);
    path[tlen - hlen] = '\0';
    return;
  }
 
fallback:
  account_to_url(&cac_target, &url);
  url.path = target_mailbox;
  url_tostring(&url, path, pathlen, U_NONE);
}

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imap_continue()

enum QuadOption imap_continue	(	const char *	msg,
		const char *	resp )

Display a message and ask the user if they want to go on.

Parameters

msg	Location of the error
resp	Message for user

Return values

QuadOption

Result, e.g. MUTT_NO

Definition at line 657 of file util.c.

{
  imap_error(msg, resp);
  return query_yesorno(_("Continue?"), MUTT_NO);
}

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imap_error()

void imap_error	(	const char *	where,
		const char *	msg )

Show an error and abort.

Parameters

where	Location of the error
msg	Message for user

Definition at line 668 of file util.c.

{
  mutt_error("%s [%s]", where, msg);
}

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imap_fix_path()

char * imap_fix_path	(	const char *	mailbox,
		char *	path,
		size_t	plen )

Fix up the imap path.

Parameters

mailbox	Mailbox path
path	Buffer for the result
plen	Length of buffer

Return values

ptr	Fixed-up path

Note

the first character in mailbox matching any of the characters in $imap_delim_chars is used as a delimiter.

This is necessary because the rest of neomutt assumes a hierarchy delimiter of '/', which is not necessarily true in IMAP. Additionally, the filesystem converts multiple hierarchy delimiters into a single one, ie "///" is equal to "/". IMAP servers are not required to do this. Moreover, IMAP servers may dislike the path ending with the delimiter.

Definition at line 689 of file util.c.

{
  const char *const c_imap_delim_chars = cs_subset_string(NeoMutt->sub, "imap_delim_chars");
 
  char *out = path;
  size_t space_left = plen - 1;
 
  if (mailbox)
  {
    for (const char *c = mailbox; *c && space_left; c++, space_left--)
    {
      if (strchr(NONULL(c_imap_delim_chars), *c))
      {
        return imap_fix_path_with_delim(*c, mailbox, path, plen);
      }
      *out++ = *c;
    }
  }
 
  *out = '\0';
  return path;
}

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imap_fix_path_with_delim()

char * imap_fix_path_with_delim	(	const char	delim,
		const char *	mailbox,
		char *	path,
		size_t	plen )

Fix up the imap path.

Parameters

delim	Delimiter specified by the server
mailbox	Mailbox path
path	Buffer for the result
plen	Length of buffer

Return values

ptr	Fixed-up path

Definition at line 721 of file util.c.

{
  char *out = path;
  size_t space_left = plen - 1;
 
  if (mailbox)
  {
    for (const char *c = mailbox; *c && space_left; c++, space_left--)
    {
      if (*c == delim || *c == '/')
      {
        while (*c && *(c + 1) == *c)
          c++;
        *out++ = delim;
      }
      else
      {
        *out++ = *c;
      }
    }
  }
 
  if (out != path && *(out - 1) == delim)
  {
    out--;
  }
  *out = '\0';
  return path;
}

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imap_cachepath()

void imap_cachepath	(	char	delim,
		const char *	mailbox,
		struct Buffer *	dest )

Generate a cache path for a mailbox.

Parameters

delim	Imap server delimiter
mailbox	Mailbox name
dest	Buffer to store cache path

Definition at line 757 of file util.c.

{
  const char *p = mailbox;
  buf_reset(dest);
  if (!p)
    return;
 
  while (*p)
  {
    if (p[0] == delim)
    {
      buf_addch(dest, '/');
      /* simple way to avoid collisions with UIDs */
      if ((p[1] >= '0') && (p[1] <= '9'))
        buf_addch(dest, '_');
    }
    else
    {
      buf_addch(dest, *p);
    }
    p++;
  }
}

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imap_get_literal_count()

int imap_get_literal_count	(	char *	buf,
		unsigned int *	bytes )

Write number of bytes in an IMAP literal into bytes.

Parameters

[in]	buf	Number as a string
[out]	bytes	Resulting number

Return values

0	Success
-1	Failure

Definition at line 788 of file util.c.

{
  char *pc = NULL;
  char *pn = NULL;
 
  if (!buf || !(pc = strchr(buf, '{')))
    return -1;
 
  pc++;
  pn = pc;
  while (mutt_isdigit(*pc))
    pc++;
  *pc = '\0';
  if (!mutt_str_atoui(pn, bytes))
    return -1;
 
  return 0;
}

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imap_get_qualifier()

char * imap_get_qualifier

(

char *

buf

)

Get the qualifier from a tagged response.

Parameters

buf	Command string to process

Return values

ptr	Start of the qualifier

In a tagged response, skip tag and status for the qualifier message. Used by imap_copy_message for TRYCREATE

Definition at line 815 of file util.c.

{
  char *s = buf;
 
  /* skip tag */
  s = imap_next_word(s);
  /* skip OK/NO/BAD response */
  s = imap_next_word(s);
 
  return s;
}

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imap_next_word()

char * imap_next_word

(

char *

s

)

Find where the next IMAP word begins.

Parameters

s	Command string to process

Return values

ptr	Next IMAP word

Definition at line 832 of file util.c.

{
  bool quoted = false;
 
  while (*s)
  {
    if (*s == '\\')
    {
      s++;
      if (*s)
        s++;
      continue;
    }
    if (*s == '\"')
      quoted = !quoted;
    if (!quoted && mutt_isspace(*s))
      break;
    s++;
  }
 
  SKIPWS(s);
  return s;
}

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imap_qualify_path()

void imap_qualify_path	(	char *	buf,
		size_t	buflen,
		struct ConnAccount *	cac,
		char *	path )

Make an absolute IMAP folder target.

Parameters

buf	Buffer for the result
buflen	Length of buffer
cac	ConnAccount of the account
path	Path relative to the mailbox

Definition at line 863 of file util.c.

{
  struct Url url = { 0 };
  account_to_url(cac, &url);
  url.path = path;
  url_tostring(&url, buf, buflen, U_NONE);
}

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imap_buf_qualify_path()

void imap_buf_qualify_path	(	struct Buffer *	buf,
		struct ConnAccount *	cac,
		char *	path )

Make an absolute IMAP folder target to a buffer.

Parameters

buf	Buffer for the result
cac	ConnAccount of the account
path	Path relative to the mailbox

Definition at line 877 of file util.c.

{
  struct Url url = { 0 };
  account_to_url(cac, &url);
  url.path = path;
  url_tobuffer(&url, buf, U_NONE);
}

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imap_quote_string()

void imap_quote_string	(	char *	dest,
		size_t	dlen,
		const char *	src,
		bool	quote_backtick )

Quote string according to IMAP rules.

Parameters

dest	Buffer for the result
dlen	Length of the buffer
src	String to be quoted
quote_backtick	If true, quote backticks too

Surround string with quotes, escape " and \ with backslash

Definition at line 894 of file util.c.

{
  const char *quote = "`\"\\";
  if (!quote_backtick)
    quote++;
 
  char *pt = dest;
  const char *s = src;
 
  if (dlen < 3)
  {
    *dest = '\0';
    return;
  }
 
  *pt++ = '"';
  /* save room for quote-chars */
  dlen -= 3;
 
  for (; *s && dlen; s++)
  {
    if (strchr(quote, *s))
    {
      if (dlen < 2)
        break;
      dlen -= 2;
      *pt++ = '\\';
      *pt++ = *s;
    }
    else
    {
      *pt++ = *s;
      dlen--;
    }
  }
  *pt++ = '"';
  *pt = '\0';
}

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imap_unquote_string()

void imap_unquote_string

(

char *

s

)

Equally stupid unquoting routine.

Parameters

s	String to be unquoted

Definition at line 937 of file util.c.

{
  char *d = s;
 
  if (*s == '\"')
    s++;
  else
    return;
 
  while (*s)
  {
    if (*s == '\"')
    {
      *d = '\0';
      return;
    }
    if (*s == '\\')
    {
      s++;
    }
    if (*s)
    {
      *d = *s;
      d++;
      s++;
    }
  }
  *d = '\0';
}

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imap_munge_mbox_name()

void imap_munge_mbox_name	(	bool	unicode,
		char *	dest,
		size_t	dlen,
		const char *	src )

Quote awkward characters in a mailbox name.

Parameters

unicode	true if Unicode is allowed
dest	Buffer to store safe mailbox name
dlen	Length of buffer
src	Mailbox name

Definition at line 974 of file util.c.

{
  char *buf = mutt_str_dup(src);
  imap_utf_encode(unicode, &buf);
 
  imap_quote_string(dest, dlen, buf, false);
 
  FREE(&buf);
}

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imap_unmunge_mbox_name()

void imap_unmunge_mbox_name	(	bool	unicode,
		char *	s )

Remove quoting from a mailbox name.

Parameters

unicode	true if Unicode is allowed
s	Mailbox name

The string will be altered in-place.

Definition at line 991 of file util.c.

{
  imap_unquote_string(s);
 
  char *buf = mutt_str_dup(s);
  if (buf)
  {
    imap_utf_decode(unicode, &buf);
    strncpy(s, buf, strlen(s));
  }
 
  FREE(&buf);
}

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imap_keep_alive()

void imap_keep_alive

(

void

)

Poll the current folder to keep the connection alive.

Definition at line 1008 of file util.c.

{
  time_t now = mutt_date_now();
  const short c_imap_keep_alive = cs_subset_number(NeoMutt->sub, "imap_keep_alive");
 
  struct Account **ap = NULL;
  ARRAY_FOREACH(ap, &NeoMutt->accounts)
  {
    struct Account *a = *ap;
    if (a->type != MUTT_IMAP)
      continue;
 
    struct ImapAccountData *adata = a->adata;
    if (!adata || !adata->mailbox)
      continue;
 
    if ((adata->state >= IMAP_AUTHENTICATED) && (now >= (adata->lastread + c_imap_keep_alive)))
      imap_check_mailbox(adata->mailbox, true);
  }
}

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imap_wait_keep_alive()

int imap_wait_keep_alive

(

pid_t

pid

)

Wait for a process to change state.

Parameters

pid	Process ID to listen to

Return values

num	'wstatus' from waitpid()

Definition at line 1034 of file util.c.

{
  struct sigaction oldalrm = { 0 };
  struct sigaction act = { 0 };
  sigset_t oldmask = { 0 };
  int rc = 0;
 
  const bool c_imap_passive = cs_subset_bool(NeoMutt->sub, "imap_passive");
  cs_subset_str_native_set(NeoMutt->sub, "imap_passive", true, NULL);
  OptKeepQuiet = true;
 
  sigprocmask(SIG_SETMASK, NULL, &oldmask);
 
  sigemptyset(&act.sa_mask);
  act.sa_handler = mutt_sig_empty_handler;
#ifdef SA_INTERRUPT
  act.sa_flags = SA_INTERRUPT;
#else
  act.sa_flags = 0;
#endif
 
  sigaction(SIGALRM, &act, &oldalrm);
 
  const short c_imap_keep_alive = cs_subset_number(NeoMutt->sub, "imap_keep_alive");
  alarm(c_imap_keep_alive);
  while ((waitpid(pid, &rc, 0) < 0) && (errno == EINTR))
  {
    alarm(0); /* cancel a possibly pending alarm */
    imap_keep_alive();
    alarm(c_imap_keep_alive);
  }
 
  alarm(0); /* cancel a possibly pending alarm */
 
  sigaction(SIGALRM, &oldalrm, NULL);
  sigprocmask(SIG_SETMASK, &oldmask, NULL);
 
  OptKeepQuiet = false;
  cs_subset_str_native_set(NeoMutt->sub, "imap_passive", c_imap_passive, NULL);
 
  return rc;
}

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imap_allow_reopen()

void imap_allow_reopen

(

struct Mailbox *

m

)

Allow re-opening a folder upon expunge.

Parameters

m

Mailbox

Definition at line 1081 of file util.c.

{
  struct ImapAccountData *adata = imap_adata_get(m);
  struct ImapMboxData *mdata = imap_mdata_get(m);
  if (!adata || !adata->mailbox || (adata->mailbox != m) || !mdata)
    return;
  mdata->reopen |= IMAP_REOPEN_ALLOW;
}

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imap_disallow_reopen()

void imap_disallow_reopen

(

struct Mailbox *

m

)

Disallow re-opening a folder upon expunge.

Parameters

m

Mailbox

Definition at line 1094 of file util.c.

{
  struct ImapAccountData *adata = imap_adata_get(m);
  struct ImapMboxData *mdata = imap_mdata_get(m);
  if (!adata || !adata->mailbox || (adata->mailbox != m) || !mdata)
    return;
  mdata->reopen &= ~IMAP_REOPEN_ALLOW;
}

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imap_account_match()

bool imap_account_match	(	const struct ConnAccount *	a1,
		const struct ConnAccount *	a2 )

Compare two Accounts.

Parameters

a1	First ConnAccount
a2	Second ConnAccount

Return values

true	Accounts match

Definition at line 1109 of file util.c.

{
  if (!a1 || !a2)
    return false;
  if (a1->type != a2->type)
    return false;
  if (!mutt_istr_equal(a1->host, a2->host))
    return false;
  if ((a1->port != 0) && (a2->port != 0) && (a1->port != a2->port))
    return false;
  if (a1->flags & a2->flags & MUTT_ACCT_USER)
    return mutt_str_equal(a1->user, a2->user);
 
  const char *user = NONULL(NeoMutt->username);
 
  const char *const c_imap_user = cs_subset_string(NeoMutt->sub, "imap_user");
  if ((a1->type == MUTT_ACCT_TYPE_IMAP) && c_imap_user)
    user = c_imap_user;
 
  if (a1->flags & MUTT_ACCT_USER)
    return mutt_str_equal(a1->user, user);
  if (a2->flags & MUTT_ACCT_USER)
    return mutt_str_equal(a2->user, user);
 
  return true;
}

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mutt_seqset_iterator_new()

struct SeqsetIterator * mutt_seqset_iterator_new

(

const char *

seqset

)

Create a new Sequence Set Iterator.

Parameters

seqset

Source Sequence Set

Return values

ptr	Newly allocated Sequence Set Iterator

Definition at line 1141 of file util.c.

{
  if (!seqset || (*seqset == '\0'))
    return NULL;
 
  struct SeqsetIterator *iter = MUTT_MEM_CALLOC(1, struct SeqsetIterator);
  iter->full_seqset = mutt_str_dup(seqset);
  iter->eostr = strchr(iter->full_seqset, '\0');
  iter->substr_cur = iter->substr_end = iter->full_seqset;
 
  return iter;
}

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mutt_seqset_iterator_next()

int mutt_seqset_iterator_next	(	struct SeqsetIterator *	iter,
		unsigned int *	next )

Get the next UID from a Sequence Set.

Parameters

[in]	iter	Sequence Set Iterator
[out]	next	Next UID in set

Return values

0	Next sequence is generated
1	Iterator is finished
-1	error

Definition at line 1162 of file util.c.

{
  if (!iter || !next)
    return -1;
 
  if (iter->in_range)
  {
    if ((iter->down && (iter->range_cur == (iter->range_end - 1))) ||
        (!iter->down && (iter->range_cur == (iter->range_end + 1))))
    {
      iter->in_range = 0;
    }
  }
 
  if (!iter->in_range)
  {
    iter->substr_cur = iter->substr_end;
    if (iter->substr_cur == iter->eostr)
      return 1;
 
    iter->substr_end = strchr(iter->substr_cur, ',');
    if (!iter->substr_end)
      iter->substr_end = iter->eostr;
    else
      *(iter->substr_end++) = '\0';
 
    char *range_sep = strchr(iter->substr_cur, ':');
    if (range_sep)
      *range_sep++ = '\0';
 
    if (!mutt_str_atoui_full(iter->substr_cur, &iter->range_cur))
      return -1;
    if (range_sep)
    {
      if (!mutt_str_atoui_full(range_sep, &iter->range_end))
        return -1;
    }
    else
    {
      iter->range_end = iter->range_cur;
    }
 
    iter->down = (iter->range_end < iter->range_cur);
    iter->in_range = 1;
  }
 
  *next = iter->range_cur;
  if (iter->down)
    iter->range_cur--;
  else
    iter->range_cur++;
 
  return 0;
}

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mutt_seqset_iterator_free()

void mutt_seqset_iterator_free

(

struct SeqsetIterator **

ptr

)

Free a Sequence Set Iterator.

Parameters

[out]

ptr

Iterator to free

Definition at line 1221 of file util.c.

{
  if (!ptr || !*ptr)
    return;
 
  struct SeqsetIterator *iter = *ptr;
  FREE(&iter->full_seqset);
  FREE(ptr);
}

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