261 lines
7.2 KiB
Groff
261 lines
7.2 KiB
Groff
.\" Copyright (c) 1996 Jordan Hubbard (jkh@FreeBSD.org)
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY JORDAN HUBBARD ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd June 17, 1996
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.Dt FTPIO 3
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.Os
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.Sh NAME
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.Nm ftpLogin ,
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.Nm ftpChdir ,
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.Nm ftpErrno ,
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.Nm ftpGetModtime ,
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.Nm ftpGetSize ,
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.Nm ftpGet ,
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.Nm ftpPut ,
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.Nm ftpBinary ,
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.Nm ftpPassive ,
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.Nm ftpVerbose ,
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.Nm ftpGetURL ,
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.Nm ftpPutURL ,
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.Nm ftpLoginAf ,
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.Nm ftpGetURLAf ,
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.Nm ftpPutURLAf
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.Nd FTPIO user library
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.Sh SYNOPSIS
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.In ftpio.h
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.Ft FILE *
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.Fn ftpLogin "char *host" "char *user" "char *passwd" "int ftp_port" "int verbose" "int *retcode"
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.Ft int
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.Fn ftpChdir "FILE *stream" "char *dirname"
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.Ft int
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.Fn ftpErrno "FILE *stream"
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.Ft const char *
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.Fn ftpErrString "int errno"
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.Ft time_t
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.Fn ftpGetModtime "FILE *stream" "char *file"
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.Ft off_t
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.Fn ftpGetSize "FILE *stream" "char *file"
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.Ft FILE *
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.Fn ftpGet "FILE *stream" "char *file" "off_t *seekto"
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.Ft FILE *
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.Fn ftpPut "FILE *stream" "char *file"
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.Ft int
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.Fn ftpAscii "FILE *stream"
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.Ft int
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.Fn ftpBinary "FILE *stream"
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.Ft int
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.Fn ftpPassive "FILE *stream" "int status"
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.Ft void
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.Fn ftpVerbose "FILE *stream" "int status"
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.Ft FILE *
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.Fn ftpGetURL "char *url" "char *user" "char *passwd" "int *retcode"
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.Ft FILE *
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.Fn ftpPutURL "char *url" "char *user" "char *passwd" "int *retcode"
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.Ft FILE *
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.Fn ftpLoginAf "char *host" "int af" "char *user" "char *passwd" "int ftp_port" "int verbose" "int *retcode"
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.Ft FILE *
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.Fn ftpGetURLAf "char *url" "int af" "char *user" "char *passwd" "int *retcode"
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.Ft FILE *
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.Fn ftpPutURLAf "char *url" "int af" "char *user" "char *passwd" "int *retcode"
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.Sh DESCRIPTION
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These functions implement a high-level library for managing FTP connections.
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.Pp
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The
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.Fn ftpLogin
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function attempts to log in using the supplied
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.Fa user ,
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.Fa passwd ,
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.Fa ftp_port
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(if passed as 0,
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.Fa ftp_port
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defaults to the standard ftp port of 21) and
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.Fa verbose
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fields.
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If it is successful, a
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standard stream descriptor is returned which should be passed to
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subsequent FTP operations.
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On failure, NULL is returned and
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.Fa retcode
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will have the error code returned by the foreign server.
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.Pp
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The
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.Fn ftpChdir
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function attempts to issue a server CD command to the directory named in
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.Fa dir .
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On success, zero is returned.
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On failure, the error code from the server.
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.Pp
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The
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.Fn ftpErrno
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function returns the server failure code for the last operation (useful for
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seeing more about what happened if you are familiar with FTP error codes).
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The
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.Fn ftpErrString
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function returns a human readable version of the supplied server failure code.
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.Pp
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The
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.Fn ftpGet
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function attempts to retrieve the file named by the
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.Fa file
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argument (which is assumed to be relative to the FTP server's current directory,
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see
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.Fn ftpChdir )
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and returns a new FILE* pointer for the file or NULL on failure.
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If
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.Fa seekto
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is non-NULL, the contents of the integer it points to will be used
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as a restart point for the file, that is to say that the stream
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returned will point
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.Fa *seekto
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bytes into the file gotten (this is handy for restarting failed
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transfers efficiently).
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If the seek operation fails, the value
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of
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.Fa *seekto
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will be zero'd.
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.Pp
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The
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.Fn ftpGetModtime
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function returns the last modification time of the file named by the
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.Fa file
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argument.
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If the file could not be opened or stat'd, 0 is returned.
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.Pp
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The
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.Fn ftpGetSize
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function returns the size in bytes of the file named by the
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.Fa file
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argument.
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If the file could not be opened or stat'd, -1 is returned.
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.Pp
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The
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.Fn ftpPut
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function attempts to create a new file named by the
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.Fa file
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argument (which is assumed to be relative to the FTP server's current directory,
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see
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.Fn ftpChdir )
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and returns a new
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.Fa stream
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pointer for the file or NULL on failure.
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.Pp
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The
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.Fn ftpAscii
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function sets
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.Tn ASCII
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mode for the current server connection named by
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.Fa stream .
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.Pp
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The
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.Fn ftpBinary
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function sets binary mode for the current server connection named by
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.Fa stream .
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.Pp
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The
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.Fn ftpPassive
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function sets passive mode (for firewalls) for the current server connection
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named by
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.Fa stream
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to boolean value
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.Fa status .
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.Pp
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The
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.Fn ftpVerbose
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function sets the verbosity mode for the current server connection named by
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.Fa stream
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to boolean value
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.Fa status .
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.Pp
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The
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.Fn ftpGetURL
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function attempts to retrieve the file named by the supplied
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.Fa URL
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and can be considered equivalent to the combined
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.Fn ftpLogin ,
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.Fn ftpChdir
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and
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.Fn ftpGet
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operations except that no server
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.Fa stream
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is ever returned - the connection to the server closes when
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the file has been completely read.
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Use the lower-level routines
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if multiple gets are required as it will be far more efficient.
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.Pp
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The
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.Fn ftpPutURL
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function attempts to create the file named by the supplied
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.Fa URL
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and can be considered equivalent to the combined
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.Fn ftpLogin ,
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.Fn ftpChdir
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and
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.Fn ftpPut
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operations except that no server stream is ever returned - the connection
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to the server closes when the file has been completely written.
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Use the
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lower-level routines if multiple puts are required as it will be far more
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efficient.
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.Pp
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The
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.Fn ftpLoginAf ,
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.Fn ftpGetURLAf ,
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.Fn ftpPutURLAf
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functions are same as
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.Fn ftpLogin ,
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.Fn ftpGetURL ,
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.Fn ftpPutURL
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except that they are able to specify address family
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.Fa af .
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.Sh ENVIRONMENT
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.Bl -tag -width FTP_PASSIVE_MODE -offset 3n
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.It Ev FTP_TIMEOUT
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Maximum time, in seconds, to wait for a response
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from the peer before aborting an
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.Tn FTP
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connection.
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.It Ev FTP_PASSIVE_MODE
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If defined, forces the use of passive mode, unless equal
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to ``NO'' or ``no'' in which case active mode is forced.
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If defined, the setting of this variable always overrides any calls to
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.Fn ftpPassive .
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.El
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.Sh HISTORY
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Started life as Poul-Henning Kamp's ftp driver for the system installation
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utility, later significantly mutated into a more general form as an
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extension of stdio by Jordan Hubbard.
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Also incorporates some ideas and
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extensions from Jean-Marc Zucconi.
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.Sh AUTHORS
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.An Jordan Hubbard ,
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.An Poul-Henning Kamp
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and
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.An Jean-Marc Zucconi
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.Sh BUGS
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I am sure you can get this thing's internal state machine confused if
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you really work at it, but so far it has proven itself pretty robust in
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all my tests.
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