/**
* lock_realpath - Try to lock the ctx->realpath
* @param m Mailbox to lock
* @param excl Lock exclusively?
* @retval true Success (locked or readonly)
* @retval false Error (can't lock the file)
*
* Try to (exclusively) lock the mailbox. If we succeed, then we mark the
* mailbox as locked. If we fail, but we didn't want exclusive rights, then
* the mailbox will be marked readonly.
*/
static bool lock_realpath(struct Mailbox *m, bool excl)
{
if (!m || !m->compress_info)
return false;
struct CompressInfo *ci = m->compress_info;
if (ci->locked)
return true;
if (excl)
ci->fp_lock = fopen(m->realpath, "a");
else
ci->fp_lock = fopen(m->realpath, "r");
if (!ci->fp_lock)
{
mutt_perror(m->realpath);
return false;
}
int r = mutt_file_lock(fileno(ci->fp_lock), excl, true);
if (r == 0)
ci->locked = true;
else if (excl)
{
mutt_file_fclose(&ci->fp_lock);
m->readonly = true;
return true;
}
return r == 0;
}
/**
* mbox_lock_mailbox - Lock a mailbox
* @param m Mailbox to lock
* @param excl Exclusive lock?
* @param retry Should retry if unable to lock?
* @retval 0 Success
* @retval -1 Failure
*/
static int mbox_lock_mailbox(struct Mailbox *m, bool excl, bool retry)
{
struct MboxAccountData *adata = mbox_adata_get(m);
if (!adata)
return -1;
int rc = mutt_file_lock(fileno(adata->fp), excl, retry);
if (rc == 0)
adata->locked = true;
else if (retry && !excl)
{
m->readonly = true;
return 0;
}
return rc;
}
