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diff --git a/imapsync.1 b/imapsync.1 deleted file mode 100644 index af753b3..0000000 --- a/imapsync.1 +++ /dev/null @@ -1,333 +0,0 @@ -.TH IMAPSYNC "1" "JULY 2015" "imapsync" "User Commands" - -.SH NAME -imapsync \- IMAP-to-IMAP synchronization program for QRESYNC-capable servers - -.SH SYNOPSIS -.B imapsync\fR [\fIOPTION\fR ...] [\fICOMMAND\fR] [\fIMAILBOX\fR ...] - - -.SH DESCRIPTION -.PP -.B imapsync\fR performs stateful synchronization between two IMAP4rev1 -servers. -Such synchronization is made possible by the QRESYNC extension from -[RFC7162]; for convenience reasons servers must also support -LIST\-EXTENDED [RFC5258], LIST\-STATUS [RFC5819] and UIDPLUS [RFC4315]. -Furthermore, while \fBimapsync\fR can work with servers lacking support -for LITERAL+ [RFC2088] and MULTIAPPEND [RFC3502], these extensions -greatly improve performance by reducing the number of required round -trips hence are recommended. - -.PP -Stateful synchronization is only possible for mailboxes supporting -persistent message Unique Identifiers (UID) and persistent storage of -mod\-sequences (MODSEQ); any non\-compliant mailbox will cause -\fBimapsync\fR to abort. -Furthermore, because UIDs are allocated not by the client but by the -server, \fBimapsync\fR needs to keep track of associations between local -and remote UIDs for each mailbox. -The synchronization state of a mailbox consists of its UIDNEXT and -HIGHESTMODSEQ values on each server; -it is then assumed that each message with UID < $UIDNEXT have been -replicated to the other server, and that the metadata (such as flags) of -each message with MODSEQ <= $HIGHESTMODSEQ have been synchronized. -Conceptually, the synchronization algorithm is derived from [RFC4549] -with the [RFC7162, section 6] amendments, and works as follows: - -.nr step 1 1 -.IP \n[step]. 8 -SELECT (on both servers) a mailbox the current UIDNEXT or HIGHESTMODSEQ -values of which differ from the values found in the database (for either -server). Use the QRESYNC SELECT parameter from [RFC7162] to list -changes (vanished messages and flag updates) since $HIGHESTMODSEQ to -messages with UID<$UIDNEXT. - -.IP \n+[step]. -Propagate these changes onto the other server: get the corresponding -UIDs from the database, then a/ issue an UID STORE + UID EXPUNGE command -to remove messages that have not already been deleted on both servers, -and b/ issue UID STORE commands to propagate flag updates (send a single -command for each flag list in order the reduce the number of round -trips). -(Conflicts may occur if the metadata of a message has been updated on -both servers with different flag lists; in that case \fBimapsync\fR -issues a warning and updates the message on each server with the union -of both flag lists.) -Repeat this step if the server sent some updates in the meantime. -Otherwise, update the HIGHESTMODSEQ value in the database. - -.IP \n+[step]. -Process new messages (if the current UIDNEXT value differ from the one -found in the database) by issuing an UID FETCH command and for each -message RFC822 body received, issue an APPEND command to the other -server on\-the\-fly. -Repeat this step if the server received new messages in the meantime. -Otherwise, update the UIDNEXT value in the database. -Go back to step 2 if the server sent some updates in the meantime. - -.IP \n+[step]. -Go back to step 1 to proceed with the next unsynchronized mailbox. - -.SH COMMANDS -.PP -By default \fBimapsync\fR synchronizes each mailbox listed by the -\(lqLIST "" "*"\(rq IMAP command; -the \fIlist-mailbox\fR, \fIlist-select-opts\fR and \fIignore-mailbox\fR -options from the configuration file can be used to shrink that list and -save bandwidth. -However if some extra argument are provided on the command line, -\fBimapsync\fR ignores said options and synchronizes the given -\fIMAILBOX\fRes instead. Note that each \fIMAILBOX\fR is taken \(lqas -is\(rq; in particular, it must be UTF-7 encoded, unquoted, and the list -wildcards \(oq*\(cq and \(oq%\(cq are not interpolated. - -.PP -If the synchronization was interrupted during a previous run while some -messages were being replicated (but before the UIDNEXT or HIGHESTMODSEQ -values have been updated), \fBimapsync\fR performs a \(lqfull -synchronization\(rq on theses messages only: -downloading the whole UID and flag lists on each servers allows -\fBimapsync\fR to detect messages that have been removed or for which -their flags have changed in the meantime. -Finally, after propagating the offline changes for these messages, -\fBimapsync\fR resumes the synchronization for the rest of the mailbox. - -.PP -Specifying one of the commands below makes \fBimapsync\fR perform an -action other than the default QRESYNC-based synchronization. - -.TP -.B \-\-repair \fR[\fIMAILBOX\fR ...] -List the database anomalies and try to repair them. -(Consider only the given \fIMAILBOX\fRes if non-optional arguments are -provided.) -This is done by performing a so\-called \(lqfull synchronization\(rq, -namely 1/ download all UIDs along with their flags from both the local -and remote servers, 2/ ensure that each entry in the database corresponds -to an existing UID, and 3/ ensure that both flag lists match. -Any message found on a server but not in the database is replicated on -the other server (which in the worst case, might lead to a message -duplicate). -Flag conflicts are solved by updating each message to the union of both -lists. - -.TP -.B \-\-delete \fIMAILBOX\fR [...] -Delete the given \fIMAILBOX\fRes on each target (by default each server -plus the database, unless \fB\-\-target\fR specifies otherwise) where -it exists. -Note that per [RFC3501] deletion is not recursive: \fIMAILBOX\fR's -children are not deleted. - -.TP -.B \-\-rename \fISOURCE\fR \fIDEST\fR -Rename the mailbox \fISOURCE\fR to \fIDEST\fR on each target (by default -each server plus the database, unless \fB\-\-target\fR specifies -otherwise) where it exists. -\fBimapsync\fR aborts if \fIDEST\fR already exists on either target. -Note that per [RFC3501] the renaming is recursive: \fISOURCE\fR's -children are moved to become \fIDEST\fR's children instead. - - -.SH OPTIONS -.TP -.B \-\-config=\fR\fIFILE\fR -Specify an alternate configuration file. Relative paths start from -\fI$XDG_CONFIG_HOME\fR, or \fI~/.config\fR if the XDG_CONFIG_HOME -environment variable is unset. - -.TP -.B \fB\-\-target=\fR{local,remote,database} -Limit the scope of a \fB\-\-delete\fR or \fB\-\-rename\fR command -to the given target. Can be repeated to act on multiple targets. By -default all three targets are considered. - -.TP -.B \-q\fR, \fB\-\-quiet\fR -Try to be quiet. - -.TP -.B \-\-debug -Turn on debug mode. Debug messages are written to the given \fIlogfile\fR. -Note that this include all IMAP traffic (except literals). Depending on the -chosen authentication mechanism, this might include authentication credentials. - -.TP -.B \-h\fR, \fB\-\-help\fR -Output a brief help and exit. - -.TP -.B \-\-version -Show the version number and exit. - -.SH CONFIGURATION FILE - -Unless told otherwise by the \fB\-\-config=\fR\fIFILE\fR option, -\fBimapsync\fR reads its configuration from -\fI$XDG_CONFIG_HOME/imapsync\fR (or \fI~/.config/imapsync\fR if the -XDG_CONFIG_HOME environment variable is unset) as an INI file. -The syntax of the configuration file is a serie of -\fIOPTION\fR=\fIVALUE\fR lines organized under some \fI[SECTION]\fR; -lines starting with a \(oq#\(cq or \(oq;\(cq character are ignored as -comments. -The sections \(lq[local]\(rq and \(lq[remote]\(rq define the two IMAP -servers to synchronize. -Valid options are: - -.TP -.I database -SQLite version 3 database file to use to keep track of associations -between local and remote UIDs, as well as the UIDVALIDITY, UIDNEXT and -HIGHESTMODSEQ of each known mailbox on both servers. -Relative paths start from \fI$XDG_DATA_HOME/imapsync\fR, or -\fI~/.local/share/imapsync\fR if the XDG_DATA_HOME environment variable -is unset. -This option is only available in the default section. -(Default: \(lq\fIhost\fR.db\)\(rq, where \fIhost\fR is taken from the -\(lq[remote]\(rq or \(lq[local]\(rq sections, in that order.) - -.TP -.I list-mailbox -A space separated list of mailbox patterns to use when issuing the -initial LIST command (overridden by the \fIMAILBOX\fRes given as -command-line arguments). -Note that each pattern containing special characters such as spaces or -brackets (see [RFC3501] for the exact syntax) must be quoted. -Furthermore, non-ASCII names must be UTF\-7 encoded. -Two wildcards are available: a \(oq*\(cq character matches zero or more -characters, while a \(oq%\(cq character matches zero or more characters -up to the mailbox's hierarchy delimiter. -This option is only available in the default section. -(The default pattern, \(lq*\(rq, matches all visible mailboxes on the -server.) - -.TP -.I list-select-opts -An optional space separated list of selectors for the initial LIST -command. (Requires a server supporting the LIST-EXTENDED [RFC5258] -extension.) Useful values are -\(lqSUBSCRIBED\(rq (to list only subscribed mailboxes), -\(lqREMOTE\(rq (to also list remote mailboxes on a server supporting -mailbox referrals), and \(lqRECURSIVEMATCH\(rq (to list parent mailboxes -with children matching one of the \fIlist-mailbox\fR patterns above). -This option is only available in the default section. - -.TP -.I ignore-mailbox -An optional Perl Compatible Regular Expressions (PCRE) covering -mailboxes to exclude: -any (UTF-7 encoded, unquoted) mailbox listed in the initial LIST -responses is ignored if it matches the given expression. -Note that the \fIMAILBOX\fRes given as command-line arguments bypass the -check and are always considered for synchronization. -This option is only available in the default section. - -.TP -.I logfile -A file name to use to log debug and informational messages. This option is -only available in the default section. - -.TP -.I type -One of \(lqimap\(rq, \(lqimaps\(rq or \(lqtunnel\(rq. -\fItype\fR=imap and \fItype\fR=imaps are respectively used for IMAP and -IMAP over SSL/TLS connections over a INET socket. -\fItype\fR=tunnel causes \fBimapsync\fR to open a pipe to a -\fIcommand\fR instead of a raw socket. -Note that specifying \fItype\fR=tunnel in the \(lq[remote]\(rq section -makes the default \fIdatabase\fR to be \(lqlocalhost.db\(rq. -(Default: \(lqimaps\(rq.) - -.TP -.I host -Server hostname, for \fItype\fR=imap and \fItype\fR=imaps. -(Default: \(lqlocalhost\(rq.) - -.TP -.I port -Server port. -(Default: \(lq143\(rq for \fItype\fR=imap, \(lq993\(rq for -\fItype\fR=imaps.) - -.TP -.I command -Command to use for \fItype\fR=tunnel. Must speak the IMAP4rev1 protocol -on its standard output, and understand it on its standard input. - -.TP -.I STARTTLS -Whether to use the \(lqSTARTTLS\(rq directive to upgrade to a secure -connection. Setting this to \(lqYES\(rq for a server not advertising -the \(lqSTARTTLS\(rq capability causes \fBimapsync\fR to immediately -abort the connection. -(Ignored for \fItype\fRs other than \(lqimap\(rq. Default: \(lqYES\(rq.) - -.TP -.I auth -Space\-separated list of preferred authentication mechanisms. -\fBimapsync\fR uses the first mechanism in that list that is also -advertised (prefixed with \(lqAUTH=\(rq) in the server's capability list. -Supported authentication mechanisms are \(lqPLAIN\(rq and \(lqLOGIN\(rq. -(Default: \(lqPLAIN LOGIN\(rq.) - -.TP -.I username\fR, \fIpassword\fR -Username and password to authenticate with. Can be required for non -pre\-authenticated connections, depending on the chosen authentication -mechanism. - -.TP -.I SSL_cipher_list -Cipher list to use for the connection. -See \fIciphers\fR(1ssl) for the format of such list. - -.TP -.I SSL_fingerprint -Fingerprint of the server certificate in the form -\fIALGO\fR$\fIDIGEST_HEX\fR, where \fIALGO\fR is the used algorithm -(default \(lqsha256\(rq). -Attempting to connect to a server with a non-matching certificate -fingerprint causes \fBimapsync\fR to abort the connection immediately -after the SSL/TLS handshake. - -.TP -.I SSL_verify_trusted_peer -Whether to verify that the peer certificate has been signed by a trusted -Certificate Authority. Note that using \fISSL_fingerprint\fR to specify -the fingerprint of the server certificate is orthogonal and does not -rely on Certificate Authorities. -(Default: \(lqYES\(rq.) - -.TP -.I SSL_ca_path -Directory containing the certificate(s) of the trusted Certificate -Authorities, used for server certificate verification. - -.SH KNOWN BUGS AND LIMITATIONS - -.IP \[bu] -Using \fBimapsync\fR on two identical servers with a non-existent or -empty database will duplicate each message due to the absence of -local/remote UID association. -.IP \[bu] -\fBimapsync\fR is single threaded and doesn't use IMAP command -pipelining. Synchronization could be boosted up by sending independent -commands (such as the initial LIST/STATUS command) to each server in -parallel, and for a given server, by sending independent commands (such -as flag updates) in a pipeline. -.IP \[bu] -Because the IMAP protocol doesn't have a specific response code for when -a message is moved to another mailbox (using the MOVE command from -[RFC6851] or COPY + STORE + EXPUNGE), moving a messages causes -\fBimapsync\fR to believe that it was deleted while another one (which -is replicated again) was added to the other mailbox in the meantime. - -.IP \[bu] -\(lqPLAIN\(rq and \(lqLOGIN\(rq are the only authentication mechanisms -currently supported. - -.SH AUTHOR -Written by Guilhem Moulin -.MT guilhem@fripost.org -.ME . |