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. Neither the name of the University nor the names of its contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.Dd January 12, 1994 29.Dt UUENCODE 5 30.Os 31.Sh NAME 32.Nm uuencode 33.Nd format of an encoded uuencode file 34.Sh DESCRIPTION 35Files output by 36.Xr uuencode 1 37consist of a header line, 38followed by a number of body lines, 39and a trailer line. 40The 41.Xr uudecode 1 42command 43will ignore any lines preceding the header or 44following the trailer. 45Lines preceding a header must not, of course, 46look like a header. 47.Pp 48The header line is distinguished by having the first 496 characters 50.Dq begin\ \& 51(note the trailing space). 52The word 53.Em begin 54is followed by a mode (in octal), 55and a string which names the remote file. 56A space separates the three items in the header line. 57.Pp 58The body consists of a number of lines, each at most 62 characters 59long (including the trailing newline). 60These consist of a character count, 61followed by encoded characters, 62followed by a newline. 63The character count is a single printing character, 64and represents an integer, the number of bytes 65the rest of the line represents. 66Such integers are always in the range from 1 to 45 or 64 and can 67be determined by subtracting the character space (octal 40) 68from the character. 69Character 64 represents a count of zero. 70.Pp 71Groups of 3 bytes are stored in 4 characters, 6 bits per character. 72All characters are always in range from 1 to 64 and are offset by a 73space (octal 40) to make the characters printing. 74Character 7564 represents a count of zero. 76The last line may be shorter than the normal 45 bytes. 77If the size is not a multiple of 3, this fact can be determined 78by the value of the count on the last line. 79Extra null characters will be included to make the character count a multiple 80of 4. 81The body is terminated by a line with a count of zero. 82This line consists of one 83.Tn ASCII 84backquote (octal 140) character. 85.Pp 86The trailer line consists of 87.Dq end 88on a line by itself. 89.Sh SEE ALSO 90.Xr mail 1 , 91.Xr uucp 1 , 92.Xr uudecode 1 , 93.Xr uuencode 1 94.Sh HISTORY 95The 96.Nm 97file format appeared in 98.Bx 4.0 . 99.\" It was named uuencode.5 prior to 4.3 100