1.\" Copyright (c) 1990, 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 1, 2025 29.Dt SHAR 1 30.Os 31.Sh NAME 32.Nm shar 33.Nd create a shell archive of files 34.Sh DEPRECATION NOTICE 35.Nm 36is obsolete and may not be present in 37.Fx 15 38and later. 39Because shell archives are simultaneously data and code and are typically 40interpreted by 41.Xr sh 1 , 42they can easily be trojan-horsed and pose a significant security risk to users. 43The 44.Xr tar 1 45utility can still produce shar encodings of files if needed. 46.Sh SYNOPSIS 47.Nm 48.Ar 49.Sh DESCRIPTION 50The 51.Nm 52command writes a 53.Xr sh 1 54shell script to the standard output which will recreate the file 55hierarchy specified by the command line operands. 56Directories will be recreated and must be specified before the 57files they contain (the 58.Xr find 1 59utility does this correctly). 60.Pp 61The 62.Nm 63command is normally used for distributing files by 64.Xr ftp 1 65or 66.Xr mail 1 . 67.Sh EXAMPLES 68To create a shell archive of the program 69.Xr ls 1 70and mail it to Rick: 71.Bd -literal -offset indent 72cd ls 73shar `find . -print` \&| mail -s "ls source" rick 74.Ed 75.Pp 76To recreate the program directory: 77.Bd -literal -offset indent 78mkdir ls 79cd ls 80\&... 81<delete header lines and examine mailed archive> 82\&... 83sh archive 84.Ed 85.Sh SEE ALSO 86.Xr compress 1 , 87.Xr mail 1 , 88.Xr tar 1 , 89.Xr uuencode 1 90.Sh HISTORY 91The 92.Nm 93command appeared in 94.Bx 4.4 . 95.Sh BUGS 96The 97.Nm 98command makes no provisions for special types of files or files containing 99magic characters. 100The 101.Nm 102command cannot handle files without a newline ('\\n') 103as the last character. 104.Pp 105It is easy to insert trojan horses into 106.Nm 107files. 108It is strongly recommended that all shell archive files be examined 109before running them through 110.Xr sh 1 . 111Archives produced using this implementation of 112.Nm 113may be easily examined with the command: 114.Bd -literal -offset indent 115egrep -av '^[X#]' shar.file 116.Ed 117