1.\" Copyright (c) 1989, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)uuencode.format.5 8.2 (Berkeley) 1/12/94 33.\" 34.Dd January 12, 1994 35.Dt UUENCODE 5 36.Os BSD 4 37.Sh NAME 38.Nm uuencode 39.Nd format of an encoded uuencode file 40.Sh DESCRIPTION 41Files output by 42.Xr uuencode 1 43consist of a header line, 44followed by a number of body lines, 45and a trailer line. 46The 47.Xr uudecode 1 48command 49will ignore any lines preceding the header or 50following the trailer. 51Lines preceding a header must not, of course, 52look like a header. 53.Pp 54The header line is distinguished by having the first 556 characters 56.Dq begin\ \& 57(note the trailing space). 58The word 59.Em begin 60is followed by a mode (in octal), 61and a string which names the remote file. 62A space separates the three items in the header line. 63.Pp 64The body consists of a number of lines, each at most 62 characters 65long (including the trailing newline). 66These consist of a character count, 67followed by encoded characters, 68followed by a newline. 69The character count is a single printing character, 70and represents an integer, the number of bytes 71the rest of the line represents. 72Such integers are always in the range from 1 to 45 or 64 and can 73be determined by subtracting the character space (octal 40) 74from the character. 75Character 64 represents a count of zero. 76.Pp 77Groups of 3 bytes are stored in 4 characters, 6 bits per character. 78All characters are always in range from 1 to 64 and are offset by a 79space (octal 40) to make the characters printing. Character 8064 represents a count of zero. 81The last line may be shorter than the normal 45 bytes. 82If the size is not a multiple of 3, this fact can be determined 83by the value of the count on the last line. 84Extra garbage will be included to make the character count a multiple 85of 4. 86The body is terminated by a line with a count of zero. 87This line consists of one 88.Tn ASCII 89backquote (octal 140) character. 90.Pp 91The trailer line consists of 92.Dq end 93on a line by itself. 94.Sh SEE ALSO 95.Xr mail 1 , 96.Xr uucp 1 , 97.Xr uudecode 1 , 98.Xr uuencode 1 99.Sh HISTORY 100The 101.Nm uuencode 102file format appeared in 103.Bx 4.0 . 104.\" It was named uuencode.5 prior to 4.3 105