hfaxd

HFAXD(8C)                                                            HFAXD(8C)



NAME
       hfaxd - HylaFAX client-server protocol server

SYNOPSIS
       /usr/lib/fax/hfaxd [ -d ] [ -q dir ] [ -o port ] [ -O ] [ -l
       bindaddress ] [ -i port ] [ -I ] [ -s port ] [ -S ]

DESCRIPTION
       hfaxd is the HylaFAX program that implements the server portion of:

       ·  the client-server protocol and

       ·  the Simple Network Paging Protocol (SNPP) used to submit message
          pager jobs to the IXO/TAP and UCP support.

       Additional client-server protocols are planned and hfaxd is intended to
       be the ``carrier'' through which they are supported.

       hfaxd is typically used in one of two ways; either as a standalone
       process that is started at system boot time to listen for client
       connections on one or more ports (in which case the -i, -o, or -s
       option must be used), or as a subservient process to the inetd(8C)
       program.  The two forms of use may however be combined so long as the
       same service is not provided both by the standalone hfaxd and through
       inetd.

HYLAFAX (NEW) CLIENT-SERVER PROTOCOL SUPPORT
       If hfaxd is started with the -i option it will service clients using
       the HylaFAX client-server protocol.  This protocol is strongly related
       to the Internet File Transfer Protocol (FTP); so much so in fact that
       FTP client programs that include support for ``quoted commands'' may be
       used to communicate with hfaxd using the new protocol.  (It should also
       be possible to use FTP-aware World Wide Web browsers such as Mosaic and
       Netscape Navigator to access HylaFAX servers through the new protocol;
       but the current format for information returned in directory listings
       confuses them.)

       The hfaxd server currently recognizes the following protocol requests;
       case is not distinguished.  Entries marked with a ¹ can be used only
       when the client has established administrative privileges with ADMIN.

       Request         Description
       ABOR            abort previous command
       ACCT            specify account (ignored)
       ADMIN           specify password for administrative privileges
       ALLO            allocate storage (vacuously)
       ANSWER¹         request that call be answered
       APPE            append to a file
       CDUP            change to parent of current working directory
       CHMOD           change mode of a file
       CHOWN¹          change owner of a file
       CWD             change working directory
       DELE            delete a file
       DISABLE¹        disable outbound use of modem
       ENABLE¹         enable outbound use of modem
       HELP            give help information
       FILEFMT         specify/query format for returning file status
       FILESORTFMT     specify/query format for sorting file status listing
       FORM            specify data transfer format
       IDLE            set idle-timer (in seconds)
       JDELE           delete done or suspended job
       JINTR           interrupt job
       JKILL           kill job
       JNEW            create new job
       JOB             set/query current job
       JOBFMT          specify/query format for returning job status
       JOBSORTFMT      specify/query format for sorting job status listing
       JPARM           specify/query job state parameter
       JREST           reset current job state
       JSUBM           submit job to scheduler
       JSUSP           suspend job from scheduling
       JWAIT           wait for job to complete
       JGDELE          delete group of jobs
       JGKILL          kill group of jobs
       JGINTR          interrupt group of jobs
       JGNEW           place current job in a new job group
       JGPARM          set state parameter in a group of jobs
       JGREST          reset current state for a group of jobs
       JGRP            set/query current job group
       JGSUBM          submit group of jobs to scheduler
       JGSUSP          suspend group of jobs from scheduling
       JGWAIT          wait for group of jobs to complete
       LIST            list files in a directory
       MDTM            show last modification time of file
       MODE            specify data transfer mode
       MDMFMT          specify/query format for returning modem status
       MDMSORTFMT      specify/query format for sorting modem status listing
       NLST            give name list of files in directory
       NOOP            do nothing
       PASS            specify password
       PASV            prepare for server-to-server transfer
       PORT            specify data connection port
       PWD             print the current working directory
       QUIT            terminate session
       RCVFMT          specify/query format for returning received facsimile status
       RCVSORTFMT      specify/query format for sorting received facsimile status listing
       REIN            reinitiate server state
       REST            restart incomplete transfer
       RETP            retrieve the next page in a file
       RETR            retrieve a file
       SHUT            schedule server shutdown
       SITE            non-standard commands (see next section)
       SIZE            return size of file
       STAT            return status of server or file
       STOR            store a file
       STOT            store a temporary file with a unique name
       STOU            store a file with a unique name
       STRU            specify data transfer structure
       SYST            show operating system type of server system
       TYPE            specify data transfer type
       TZONE           specify timezone handling for dates and times
       USER            specify user name
       VRFY            verify dialstring handling and/or least-cost routing

       The following non-standard or experimental commands are supported
       through the SITE request.

       Request          Description
       ADDMODEM¹        add/configure new modem for use
       ADDUSER¹         add client access control entry
       CONFIG¹          send configuration parameter setting to server
       DELMODEM¹        deconfigure/remove modem
       DELUSER¹         remove client access control entry
       TRIGGER          register realtime event trigger
       HELP             give help information, e.g., SITE HELP

       In addition FTP requests that are specified in Internet RFC 959 but not
       listed here are recognized, but not implemented.

       The hfaxd server will abort an active data transfer only when the ABOR
       command is preceded by a Telnet "Interrupt Process" (IP) signal and a
       Telnet "Synch" signal in the command Telnet stream, as described in
       Internet RFC 959.  If a STAT command is received during a data
       transfer, preceded by a Telnet IP and Synch, transfer status will be
       returned.

SIMPLE NETWORK PAGING PROTOCOL (SNPP) SUPPORT
       If hfaxd is started with the -s option it will service clients using
       the Simple Network Pager Protocol (SNPP) as specified in RFC 1861
       (which obsoletes RFC 1645).

       The hfaxd server currently recognizes the SNPP protocol requests listed
       below.  Requests marked with a ¹ are non-standard extensions to RFC
       1861 that may be added to SNPP at some future time.  Case is not
       distinguished and only the first four characters of requests are used
       in identifying commands.

       Request      Description
       2WAY         preface a 2-way transaction
       ABOR¹        abort previous command
       ACKR         set read acknowledgement handling for subsequent requests
       ALER         set the alter-level for subsequent requests
       CALL         set the caller-ID for subsequent requests
       COVE         set the alternate coverage area for subsequent requests
       DATA         specify a multi-line message
       EXPT         set the expiration time for subsequent requests
       HELP         give help information
       HOLD         set the time at which subsequent requests are to be delivered
       KTAG         kill a previously submitted request
       LEVE         set the service level for subsequent requests
       LOGI         login to server
       MCRE         specify multiple response text and code
       MESS         specify a single-line message
       MSTA         return the status of a previously submitted request
       NOQU         disable message queueing
       PAGE         specify the destination pager
       PING         locate/validate a pager
       QUIT         terminate session
       RESE         reset server state
       RTYP         set the reply type code for subsequent requests
       SEND         send message(s)
       SITE¹        site-specific commands (see next section)
       STAT¹        return server status
       SUBJ         set the message text for subsequent requests

       The hfaxd server will abort an active SEND operation when an ABOR
       command is preceded by a Telnet "Interrupt Process" (IP) signal and a
       Telnet "Synch" signal in the command Telnet stream.

       The following non-standard or experimental commands are also supported
       through the SITE request.

       Request        Description
       FROMUSER       specify the sender's identity
       IDLE           set idle-timer (in seconds)
       JPARM          query job parameter status
       JQUEUE         control whether or not job is queued
       LASTTIME       set the time to terminate an unfinished job
       MAILADDR       set the e-mail address to use for notification
       MAXDIALS       set the maximum number of times to dial the phone
       MAXTRIES       set the maximum number of times to try sending the page
       MODEM          set the modem or class of modems to use
       NOTIFY         set the e-mail notification
       RETRYTIME      set the time to delay between job retries
       SCHEDPRI       set the scheduling priority for the job
       HELP           give help information, e.g., SITE HELP

       Note that hfaxd requires that SNPP clients login first with the LOGI
       directive while RFC 1861 permits clients to submit pages anonymously.

CLIENT ACCESS CONTROL
       hfaxd controls client access according to the information in the file
       /var/spool/hylafax/etc/hosts.hfaxd.  This file defines the set of users
       and machines that may receive service and, optionally, defines password
       challenges to use in authenticating clients.  Clients may be permitted
       access to services with or without a password challenge.  Access may
       also be restricted based on the host machine that a request for service
       originates from.  Consult hosts.hfaxd(5F) for information on the format
       and content of this file.  The SITE ADDUSER protocol request is
       provided for adding new users to a server (available only to clients
       with administrative privileges).

       Server resources are controlled based on clients' identities.  Jobs and
       documents, both received and submitted, are protected by the server.
       Typically clients are permitted access to anything they own or that is
       publicly accessible.  There are also administrative privileges that
       clients may acquire and which permit them wide access to objects that
       reside on the server.

       A complete client-server protocol specification is still outstanding.

       hfaxd operates with its root directory set to the top of the HylaFAX
       spooling area; /var/spool/hylafax.  This is done so that clients see a
       virtual file hierarchy that is completely contained within the HylaFAX
       operating environment on the server machine.  Administrators however
       must be aware of this action when specifying files in the hfaxd
       configuration file: absolute pathnames relative to the root of the
       spooling should be used to specify filenames.

SERVER ACCESS CONTROL
       The file /var/spool/hylafax/etc/shutdown, when present, specifies when
       to restrict access to a server machine.  When this file is present and
       contains valid information hfaxd will permit only users with
       administrative privileges to access the server.  Any other users that
       request service will be denied access and negative server responses
       will include any shutdown message specified in the shutdown file.
       Consult hylafax-shutdown(5F) for information on the format and content
       of this file.

       The SHUT protocol request can be used to schedule a server shutdown; it
       is available only to clients with administrative privileges.  To make a
       shutdown server available again the shutdown file can be deleted with
       the DELE protocol request (this is to be replaced with an ``unshut''
       protocol request so that implementation details are not part of the
       protocol).

CONFIGURATION FILES
       hfaxd reads configuration information from the file
       /usr/lib/fax/hfaxd.conf each time a new server process is started (i.e.
       for each new client).  This file uses the same conventions used by
       other HylaFAX configuration files; as described in hylafax-config(5F).
       The following configuration parameters are recognized; items marked
       ``(SNPP)'' are used only by the SNPP support.
       Tag                      Type       Default                             Description
       AllowSortFormat          boolean    true                                Allow client to request sorting formats
       FaxContact               string     see below                           contact address to show in help text
       FileFmt                  string     see below                           format string for file status results
       FileSortFmt              string     -                                   format string for sorting file status listing
       IdleTimeout              integer    900                                 client idle timeout in seconds
       JobFmt                   string     see below                           format string for job status results
       JobSortFmt               string     -                                   format string for sorting job status listing
       JobProtection            octal      0444                                permissions for job qfiles in sendq/doneq
       KillTimeMap              string     see below                           mapping from service level to job kill time (SNPP)
       LogFacility              string     daemon                              syslog facility name for tracing messages
       MaxAdminAttempts         integer    5                                   maximum admin attempts before disconnecting
       MaxConsecutiveBadCmds    integer    10                                  maximum invalid commands before disconnecting
       MaxIdleTimeout           integer    7200                                maximum client idle timeout permitted
       MaxLoginAttempts         integer    5                                   maximum login attempts before disconnecting
       MaxMsgLength             integer    128                                 maximum pager message length (SNPP)
       ModemFmt                 string     see below                           format string for modem status results
       ModemSortFmt             string     -                                   format string for sorting modem status listing
       PagerIDMapFile           string     /var/spool/hylafax/etc/pagermap     name of file for mapping pager IDs (SNPP)
       PriorityMap              string     see below                           mapping from service level to job priority (SNPP)
       PublicJobQ               boolean    true                                Allow public listing access to the sendq/doneq
       PublicRecvQ              boolean    true                                Allow public listing access to the recvq
       RcvFmt                   string     see below                           format string for received facsimile status results
       RcvSortFmt               string     -                                   format string for sorting received facsimile status results listing
       RetryTimeMap             string     see below                           mapping from service level to job retry time (SNPP)
       ServerTracing            integer    1                                   server tracing control vector
       ShutdownFile             string     /var/spool/hylafax/etc/shutdown     name of shutdown control file
       UserAccessFile           string     /var/spool/hylafax/etc/hosts.hfaxd  name of access control file
       XferLogFile              string     /var/spool/hylafax/etc/clientlog    name of file for logging client data transfers

       The configuration parameters are explained below:

       AllowSortFormat
                 This controls whether the server accept the *SORTFMT commands
                 which the client issues to change the server sort the
                 listings.

       FaxContact
                 The e-mail address to display as a point of contact in the
                 help text returned to a client in response to the HELP or
                 SITE HELP commands.  By default this is
                 ``FaxMaster@hostname'', where hostname is the fully qualified
                 name for the machine where the server is running.

       FileFmt   The format string to use when returning file status
                 information with the LIST and STAT commands.  Formats are
                 specified using printf(3S) style conventions but using the
                 field identifiers listed below.  Each item can include field
                 width, precision, left-justification, 0-filling, etc. just as
                 for printf; e.g. %-8p for an 8-character wide, left-
                 justified, blank-padded field containing the file protection
                 flags.

                 Format    Description
                 a         Last access time
                 c         Creation time
                 d         Device number (octal)
                 f         Filename
                 g         Group identifier (decimal)
                 i         Inode number (decimal)
                 l         Link count (decimal)
                 m         Last modification time
                 o         Owner (based on file GID)
                 p         Fax-style protection flags (no group bits)
                 q         UNIX-style protection flags
                 r         Root device number (octal)
                 s         File size in bytes (decimal)
                 u         User identifier (decimal)

                 The default format string is ``%-7p %3l %8o %8s %-12.12m
                 %.48f''.  It is recommended that all items include a field
                 width so that client applications that construct headers from
                 the format string can constrain the width of column title
                 strings.

       FileSortFmt
                 The format string to use when sorting the listing for
                 directories using the LIST command.  Follows the FileFmt
                 formatting rules.

       IdleTimeout
                 The initial/default timeout to use in timing out idle
                 clients.  This value defines the maximum amount of time (in
                 seconds) that hfaxd will wait for a command from a client
                 before terminating the connection.  Unprivileged clients may
                 alter the idle timeout up to the value of MaxIdleTimeout;
                 privileged clients may set the timeout to any value.

       JobFmt    The format string to use when returning job status
                 information for jobs in the sendq and doneq directories.
                 Formats are specified using printf(3S) style conventions but
                 using the field identifiers listed below.  Each item can
                 include field width, precision, left-justification,
                 0-filling, etc. just as for printf; e.g. %-3j for a
                 3-character wide, left-justified, blank-padded field
                 containing the job state.

                 Format    Description
                 A         Destination SubAddress
                 B         Destination Password
                 C         Destination company name
                 D         Total # dials/maximum # dials
                 E         Desired signalling rate
                 F         Client-specific tagline format string
                 G         Desired min-scanline time
                 H         Desired data format
                 I         Client-specified scheduling priority
                 J         Client-specified job tag string
                 K         Desired use of ECM
                 L         Destination geographic location
                 M         Notification e-mail address
                 N         Desired use of private tagline (one-character symbol)
                 O         Whether to use continuation cover page (one-character symbol)
                 P         # pages transmitted/total # pages to transmit
                 Q         Client-specified minimum acceptable signalling rate
                 R         Destination person (receiver)
                 S         Sender's identity
                 T         Total # tries/maximum # tries
                 U         Page chopping threshold (inches)
                 V         Job done operation
                 W         Communication identifier
                 X         Job type (one-character symbol)
                 Y         Scheduled date and time
                 Z         Scheduled time in seconds since the UNIX epoch
                 a         Job state (one-character symbol)
                 b         # consecutive failed tries
                 c         Client machine name
                 d         Total # dials
                 e         Public (external) format of dialstring
                 f         # consecutive failed dials
                 g         Group identifier
                 h         Page chop handling (one-character symbol)
                 i         Current scheduling priority
                 j         Job identifier
                 k         Job kill time
                 l         Page length in mm
                 m         Assigned modem
                 n         E-mail notification handling (one-character symbol)
                 o         Job owner
                 p         # pages transmitted
                 q         Job retry time (MM::SS)
                 r         Document resolution in lines/inch
                 s         Job status information from last failure
                 t         Total # tries attempted
                 u         Maximum # tries
                 v         Client-specified dialstring
                 w         Page width in mm
                 x         Maximum # dials
                 y         Total # pages to transmit
                 z         Time to send job

                 The default format string is ``%-4j %3i %1a %6.6o %-12.12e
                 %5P %5D %7z %.25s''.  This string constrains each status line
                 to be less than 80 characters.  It is recommended that all
                 items include a field width so that client applications, such
                 as faxstat(1) that construct headers from the format string
                 can constrain the width of column title strings.

       JobSortFmt
                 The format string to use when sorting the listing for jobs in
                 the sendq and doneq directories.  Follows the JobFmt
                 formatting rules.

       JobProtection
                 The file mode setting for job qfiles in the HylaFAX queues
                 (sendq and doneq).  The default setting of ``0644'' allows
                 all users to view all job parameters in the send/done queues.
                 If PublicJobQ is set to false, then this file mode determines
                 the permissions of the clients to see the jobs, following the
                 HylaFAX permission model of the group bits controlling uid
                 permissions and the other bits controlling other permissions.

       KillTimeMap
                 The mapping from SNPP service level (0-11) to job expiration
                 time (kill time).  A mapping is specified as a string of
                 space-separate numbers where each value is the number of
                 minutes to permit a job to run.  The default mapping is ``5 5
                 5 15 60 240 720 1440 1440 1440 1440 1440'' which expires a
                 job in 5 minutes for service levels 0-2, 15 minutes for level
                 three, 60 minutes for level four, etc.

       LogFacility
                 The symbolic name for the syslog(3) facility to use when
                 logging error messages and informational/debugging messages
                 requested through the ServerTracing parameter.  The list of
                 facility names is found in the system include file
                 <syslog.h>; comparisons are case-insensitive.

       MaxAdminAttempts
                 The maximum number of unsuccessful attempts gain
                 administrative privileges with the ADMIN command that hfaxd
                 will permit a client before terminating the connection.  Note
                 that the count of attempts is reset if/when the client
                 successfully gains administrative privileges.

       MaxConsecutiveBadCmds
                 The maximum number of consecutive unrecognized,
                 unimplemented, syntactically incorrect, or otherwise
                 unacceptable commands to permit a client before terminating
                 the connection.  This control has two purposes: to handle
                 naive or malicious clients from sending long streams of
                 nonsense commands to a server, and to insure that clients are
                 forcibly terminated when a server is marked shutdown.

       MaxIdleTimeout
                 The maximum value that a client may set the idle timeout to.
                 This value is not enforced if the client has administrative
                 privileges.

       MaxLoginAttempts
                 The maximum number of unsuccessful attempts to login with the
                 USER and PASS commands that hfaxd will permit a client before
                 terminating the connection.

       MaxMsgLength
                 The maximum number of characters to accept in a pager message
                 specified with the DATA or MESS commands.  Messages longer
                 than this value are rejected.

       ModemFmt  The format string to use when returning modem status
                 information for modems listed in the status directory.
                 Formats are specified using printf(3S) style conventions but
                 using the field identifiers listed below.  Each item can
                 include field width, precision, left-justification,
                 0-filling, etc. just as for printf; e.g. %-8h for an
                 8-character wide, left-justified, blank-padded field
                 containing the name of the host the server is running on.

                 Format    Description
                 h         Server hostname
                 l         Local identifier string
                 m         Canonical modem name
                 n         FAX phone number
                 r         Maximum pages that can be received in a single call
                 s         Status information string
                 t         Server and session tracing levels (xxxxx:yyyyy)
                 v         Modem speaker volume as one-character symbol
                 z         A ``*'' if a faxgetty(8C) process is running; otherwise `` '' (space)

                 The default format string is ``Modem %m (%n): %s''.

       ModemSortFmt
                 The format string to use when sorting the listsin for  modem
                 status information in the status directory.

       PagerIDMapFile
                 The absolute pathname of the file that contains directions
                 for mapping pager identifiers to IXO/TAP or UCP service
                 providers (and optionally a pager identification number).
                 Consult pagermap(5F) for information on the format and
                 content of this file.  (Note that absolute pathnames are
                 relative to the root of the spooling area).

       PriorityMap
                 The mapping from SNPP service level (0-11) to job scheduling
                 priority.  A mapping is specified as a string of space-
                 separate numbers where each value is the priority to assign
                 to a job.  The default mapping is ``63 127 127 127 127 127
                 127 127 127 127 127 127'' which assigns a high priority to
                 service level zero and normal (default) priority to all other
                 service levels.

       PublicJobQ
                 By default, HylaFAX has always made the listings of the
                 sendq/doneq include all jobs to any client connected to
                 hfaxd.  By setting this to false, hfaxd will also enforce
                 it's normal access restrictions on the listing of jobs in the
                 sendq/doneq.  These access restrictions are based on the file
                 mode (see JobProtection ) and the logged in uid (see
                 hosts.hfaxd )

       PublicRecvQ
                 By default, HylaFAX has always made the listings of the recvq
                 include all faxes to any client connected to hfaxd.  By
                 setting this to false, hfaxd will also enforce it's normal
                 access restrictions on the listing of faxes in the recvq.
                 These access restrictions are based on the file mode faxgetty
                 (and it's related FaxDispatch ) set for the fax, and the
                 logged in uid (see hosts.hfaxd )


       RcvFmt    The format string to use when returning status information
                 for received facsimile in the recvq directory.  Formats are
                 specified using printf(3S) style conventions but using the
                 field identifiers listed below.  Each item can include field
                 width, precision, left-justification, 0-filling, etc. just as
                 for printf; e.g. %-3b for a 3-character wide, left-justified,
                 blank-padded field containing the signalling rate.

                 Format    Description
                 a         SubAddress received from sender (if any)
                 b         Signalling rate used during receive
                 d         Data format used during receive
                 e         Error description if an error occurred during receive
                 f         Document filename (relative to the recvq directory)
                 h         Time spent receiving document (HH:MM:SS)
                 l         Page length in mm
                 m         Fax-style protection mode string (``-rwxrwx'')
                 n         File size (number of bytes)
                 o         File owner
                 p         Number of pages in document
                 q         UNIX-style protection flags
                 r         Resolution of received data
                 s         Sender identity (TSI)
                 t         Compact representation of the time when the receive happened
                 w         Page width in mm
                 z         A ``*'' if receive is going on; otherwise `` '' (space)

                 The default format string is ``%-7m %4p%1z %-8.8o %14.14s %7t
                 %f''.  This string constrains each status line to be less
                 than 80 characters.  It is recommended that all items include
                 a field width so that client applications, such as faxstat(1)
                 that construct headers from the format string can constrain
                 the width of column title strings.

       RcvSortFmt
                 The format string to use when sorting the listing for
                 received facsimile in the recvq directory.  Follows the
                 RcvFmt formatting rules.

       RetryTimeMap
                 The mapping from SNPP service level (0-11) to job retry time.
                 A mapping is specified as a string of space-separate numbers
                 where each value is the number of seconds to delay between
                 delivery attempts.  A value of zero causes retries to be
                 scheduled using the default algorithm used by the HylaFAX job
                 scheduler.  The default mapping is ``30 60 60 180 0 0 0 0 0 0
                 0 0'' which retries a level 0 job after a 30 second delay,
                 levels 1 and 2 after 60 seconds, level 3 after 3 minutes, and
                 other jobs are retried according to the usual scheduling
                 algorithm.

       ServerTracing
                 A number that controls the generation of tracing information
                 by a server.  areas that are individually controlled.  To
                 enable tracing of multiple areas of operation, the flag
                 associated with each area should be bit-or'd to form the
                 value for this tag.
                 Flag             Description
                 1 (0x00001)      General server operation
                 2 (0x00002)      Client-server protocol requests and responses
                 4 (0x00004)      File transfers from client to server
                 8 (0x00008)      File transfers from server to client
                 16 (0x00010)     Client logins
                 32 (0x00020)     All network connections
                 64 (0x00040)     FIFO messages to and from faxq(8C)
                 128 (0x00080)    TIFF Library errors and warnings
                 256 (0x00100)    Configuration file processing

                 Tracing messages are directed to syslog(3) using the facility
                 specified with the LogFacility configuration parameter.  Note
                 that syslogd(8C) must be configured to capture facility.info,
                 facility.debug, facility.warning, and facility.err messages.

       ShutdownFile
                 The absolute pathname of the server shutdown file; see
                 hylafax-shutdown(5F) for information on the format and
                 content of this file.  (Note that absolute pathnames are
                 relative to the root of the spooling area).

       UserAccessFile
                 The absolute pathname of the user access control file; see
                 hosts.hfaxd(5F) for information on the format and content of
                 this file.  (Note that absolute pathnames are relative to the
                 root of the spooling area).

       XferLogFile
                 The absolute pathname of the file to use for logging client-
                 server file transfers (when enabled through the ServerTracing
                 parameter).  (Note that absolute pathnames are relative to
                 the root of the spooling area).

OPTIONS
       -q dir    The specified directory is treated as the spooling area.  The
                 default spooling area, /var/spool/hylafax, is defined at the
                 time the software is built.

       -d        Stop hfaxd from detaching itself from the controlling
                 terminal.  This option is normally used only when running
                 hfaxd under a debugger or when hfaxd is started up from the
                 inetd(8C) process.

       -l bindaddress
                 Bind to the specified bindaddress the tcp port. Please note
                 that this argument need to be specified before the -i
                 otherwise it will be ignored. A better approach to improve
                 security would be to run hfaxd from xinetd, binding its
                 service to the specific port. This will also make hylafax
                 benefits from tcp wrappers and other options provided by
                 xinetd.

       -i port   Listen on the specified port for service requests and respond
                 with the client-server protocol.  The port may be specified
                 either symbolically, e.g. ``hylafax'' or numerically.  This
                 flag may be specified multiple times to request service on
                 multiple different ports.  Each time this flag is specified,
                 it will listen on the specified port, bound to the last -l
                 bindaddress specified.  If no -l bindaddress was specified,
                 it will bind to the system configured default wildcard
                 address, which could be any of IPv6, or IPv4, or both.

       -s port   Listen on the specified port for service requests and respond
                 with the Simple Network Paging (SNPP) protocol.  The port may
                 be specified either symbolically, e.g. ``snpp'' or
                 numerically.  This flag may be specified multiple times to
                 request service on multiple different ports.

       -I        Service the client-server protocol using the standard input
                 and output.  This option is useful when hfaxd is started up
                 by inetd(8C).

       -S        Service the Simple Network Paging (SNPP) protocol using the
                 standard input and output.  This option is useful when hfaxd
                 is started up by inetd(8C).

DIAGNOSTICS
       Diagnostics generated by hfaxd are logged using syslog(3).

FILES
       /usr/lib/fax/hfaxd.conf             server configuration file
       /var/spool/hylafax                  spooling area
       /var/spool/hylafax/FIFO             for submitting the job
       /var/spool/hylafax/sendq            where job description is placed
       /var/spool/hylafax/sendq/seqf       for assigning job identifiers
       /var/spool/hylafax/docq/seqf        for assigning document identifiers
       /var/spool/hylafax/tmp              temporary location of job-related files
       /var/spool/hylafax/docq             where document files are placed
       /var/spool/hylafax/recvq            where received facsimile are found
       /var/spool/hylafax/archive          where archived jobs are placed
       /var/spool/hylafax/log              for server log files
       /var/spool/hylafax/client           for FIFO files used in communicating with faxq
       /var/spool/hylafax/status           for server status information
       /var/spool/hylafax/config.device    for returning server status
       /var/spool/hylafax/etc/hosts.hfaxd  host access control list
       /var/spool/hylafax/etc/shutdown     server shutdown control
       /var/spool/hylafax/etc/pagermap     SNPP pager ID mapping file

BUGS
       To be filled in.

SEE ALSO
       sendfax(1), sendpage(1), faxalter(1), faxrm(1), faxstat(1), faxq(8C),
       syslog(3) hylafax-server(5F), hosts.hfaxd(5F), status(5F), hylafax-
       shutdown(5F),



                                 July 12, 1996                       HFAXD(8C)