1.\" Copyright (c) 1980, 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.\" @(#)re_comp.3 8.1 (Berkeley) 6/4/93 29.\" $FreeBSD: src/lib/libcompat/4.3/re_comp.3,v 1.6.2.4 2001/12/17 10:08:29 ru Exp $ 30.\" $DragonFly: src/lib/libcompat/4.3/re_comp.3,v 1.2 2003/06/17 04:26:48 dillon Exp $ 31.\" 32.Dd June 4, 1993 33.Dt RE_COMP 3 34.Os 35.Sh NAME 36.Nm re_comp , 37.Nm re_exec 38.Nd regular expression handler 39.Sh LIBRARY 40.Lb libcompat 41.Sh SYNOPSIS 42.In unistd.h 43.Ft char * 44.Fn re_comp "const char *s" 45.Ft int 46.Fn re_exec "const char *s" 47.Sh DESCRIPTION 48.Bf -symbolic 49This interface is made obsolete by 50.Xr regex 3 . 51.Ef 52.Pp 53The 54.Fn re_comp 55function 56compiles a string into an internal form suitable for pattern matching. 57The 58.Fn re_exec 59function 60checks the argument string against the last string passed to 61.Fn re_comp . 62.Pp 63The 64.Fn re_comp 65function 66returns 0 if the string 67.Fa s 68was compiled successfully; otherwise a string containing an 69error message is returned. 70If 71.Fn re_comp 72is passed 0 or a null string, it returns without changing the currently 73compiled regular expression. 74.Pp 75The 76.Fn re_exec 77function 78returns 1 if the string 79.Fa s 80matches the last compiled regular expression, 0 if the string 81.Fa s 82failed to match the last compiled regular expression, and \-1 if the compiled 83regular expression was invalid (indicating an internal error). 84.Pp 85The strings passed to both 86.Fn re_comp 87and 88.Fn re_exec 89may have trailing or embedded newline characters; 90they are terminated by 91.Dv NUL Ns s . 92The regular expressions recognized are described in the manual entry for 93.Xr ed 1 , 94given the above difference. 95.Sh DIAGNOSTICS 96The 97.Fn re_exec 98function 99returns \-1 for an internal error. 100.Pp 101The 102.Fn re_comp 103function 104returns 105.Dq no previous regular expression 106or one of the strings generated by 107.Xr regerror 3 . 108.Sh SEE ALSO 109.Xr ed 1 , 110.Xr egrep 1 , 111.Xr ex 1 , 112.Xr fgrep 1 , 113.Xr grep 1 , 114.Xr regex 3 115.Sh HISTORY 116The 117.Fn re_comp 118and 119.Fn re_exec 120functions appeared in 121.Bx 4.0 . 122