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Neither the name of the University nor the names of its contributors .\" may be used to endorse or promote products derived from this software .\" without specific prior written permission. .\" .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .\" @(#)uuencode.1 8.1 (Berkeley) 6/6/93 .\" $FreeBSD: src/usr.bin/uuencode/uuencode.1,v 188.8.131.52 2002/04/27 01:55:11 jmallett Exp $ .\" .Dd January 27, 2002 .Dt UUENCODE 1 .Os .Sh NAME .Nm uudecode , .Nm uuencode .Nd encode/decode a binary file .Sh SYNOPSIS .Nm uuencode .Op Fl m .Op Fl o Ar output_file .Op Ar file .Ar name .Nm uudecode .Op Fl cips .Op Ar .Nm uudecode .Op Fl i .Fl o Ar output_file .Op Ar file .Sh DESCRIPTION The .Nm uuencode and .Nm uudecode utilities are used to transmit binary files over transmission mediums that do not support other than simple .Tn ASCII data. .Pp The .Nm uuencode utility reads .Ar file (or by default the standard input) and writes an encoded version to the standard output, or .Ar output_file if one has been specified. The encoding uses only printing .Tn ASCII characters and includes the mode of the file and the operand .Ar name for use by .Nm uudecode . .Pp The .Nm uudecode utility transforms .Em uuencoded files (or by default, the standard input) into the original form. The resulting file is named either .Ar name or (depending on options passed to .Nm uudecode ) .Ar output_file and will have the mode of the original file except that setuid and execute bits are not retained. The .Nm uudecode utility ignores any leading and trailing lines. .Pp The following options are available for .Nm uuencode : .Bl -tag -width ident .It Fl m Use the Base64 method of encoding, rather than the traditional .Nm uuencode algorithm. .It Fl o Ar output_file Output to .Ar output_file instead of standard output. .El .Pp The following options are available for .Nm uudecode : .Bl -tag -width ident .It Fl c Decode more than one uuencode'd file from .Ar file if possible. .It Fl i Do not overwrite files. .It Fl o Ar output_file Output to .Ar output_file instead of any pathname contained in the input data. .It Fl p Decode .Ar file and write output to standard output. .It Fl s Do not strip output pathname to base filename. By default .Nm uudecode deletes any prefix ending with the last slash '/' for security purpose. .El .Sh EXAMPLES The following example packages up a source tree, compresses it, uuencodes it and mails it to a user on another system. When .Nm uudecode is run on the target system, the file ``src_tree.tar.Z'' will be created which may then be uncompressed and extracted into the original tree. .Pp .Bd -literal -offset indent -compact tar cf \- src_tree \&| compress \&| uuencode src_tree.tar.Z \&| mail sys1!sys2!user .Ed .Pp The following example unpack all uuencode'd files from your mailbox into your current working directory. .Pp .Bd -literal -offset indent -compact uudecode -c < $MAIL .Ed .Pp The following example extract a compress'ed tar archive from your mailbox .Pp .Bd -literal -offset indent -compact uudecode -o /dev/stdout < $MAIL | zcat | tar xfv - .Ed .Sh LEGACY DESCRIPTION In legacy operation, .Nm uudecode masks file modes with 0666, preventing the creation of executable files. .Pp .Nm uudecode cannot change the mode of a created file which is not owned by the current user (unless that user is root). In legacy operation, .Xr fchmod 2 allows the mode to be changed. .Pp For more information about legacy mode, see .Xr compat 5 . .Sh SEE ALSO .Xr basename 1 , .Xr compress 1 , .Xr mail 1 , .Xr uucp 1 , .Xr fchmod 2 , .Xr uuencode 5 .Sh BUGS Files encoded using the traditional algorithm are expanded by 35% (3 bytes become 4, plus control information). .Sh HISTORY The .Nm uudecode and .Nm uuencode utilities appeared in .Bx 4.0 .