1.\" $OpenBSD: what.1,v 1.18 2014/06/03 21:20:40 jmc Exp $ 2.\" $NetBSD: what.1,v 1.3 1994/11/17 06:59:38 jtc Exp $ 3.\" 4.\" Copyright (c) 1980, 1991, 1993 5.\" The Regents of the University of California. All rights reserved. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions 9.\" are met: 10.\" 1. Redistributions of source code must retain the above copyright 11.\" notice, this list of conditions and the following disclaimer. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 3. Neither the name of the University nor the names of its contributors 16.\" may be used to endorse or promote products derived from this software 17.\" without specific prior written permission. 18.\" 19.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29.\" SUCH DAMAGE. 30.\" 31.\" @(#)what.1 8.1 (Berkeley) 6/6/93 32.\" 33.Dd $Mdocdate: June 3 2014 $ 34.Dt WHAT 1 35.Os 36.Sh NAME 37.Nm what 38.Nd show what versions of object modules were used to construct a file 39.Sh SYNOPSIS 40.Nm what 41.Op Fl s 42.Ar 43.Sh DESCRIPTION 44.Nm 45reads each 46.Ar file 47and searches for sequences of either the form 48.Sq $ 49immediately followed by the system name (sysname) as defined by 50.Xr uname 3 , 51or the form 52.Dq @(#) 53as inserted by the source code control system (SCCS). 54It prints the remainder 55of the string following this marker, up to a NUL, newline, double 56quote, backslash, or 57.Sq > 58character. 59.Pp 60If the 61.Fl s 62option is specified, only the first occurrence of an identification string in 63each file is printed. 64.Sh EXIT STATUS 65The 66.Nm 67utility exits with a return value of 0 if any identification strings were found, 68or with a return value of 1 otherwise. 69.Sh STANDARDS 70The 71.Nm 72utility is compliant with the 73X/Open System Interfaces option of the 74.St -p1003.1-2008 75specification. 76.Sh HISTORY 77The 78.Nm 79command appeared in 80.Bx 4.0 . 81.Sh BUGS 82As 83.Bx 84is not licensed to distribute 85.Tn SCCS , 86this is a rewrite of the 87.Nm 88command which is part of 89.Tn SCCS . 90As such it may not behave exactly the same as that 91command does. 92