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. 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.\" @(#)re_comp.3 8.1 (Berkeley) 6/4/93 33.\" $FreeBSD: src/lib/libcompat/4.3/re_comp.3,v 1.6.2.4 2001/12/17 10:08:29 ru Exp $ 34.\" $DragonFly: src/lib/libcompat/4.3/re_comp.3,v 1.2 2003/06/17 04:26:48 dillon Exp $ 35.\" 36.Dd June 4, 1993 37.Dt RE_COMP 3 38.Os 39.Sh NAME 40.Nm re_comp , 41.Nm re_exec 42.Nd regular expression handler 43.Sh LIBRARY 44.Lb libcompat 45.Sh SYNOPSIS 46.In unistd.h 47.Ft char * 48.Fn re_comp "const char *s" 49.Ft int 50.Fn re_exec "const char *s" 51.Sh DESCRIPTION 52.Bf -symbolic 53This interface is made obsolete by 54.Xr regex 3 . 55.Ef 56.Pp 57The 58.Fn re_comp 59function 60compiles a string into an internal form suitable for pattern matching. 61The 62.Fn re_exec 63function 64checks the argument string against the last string passed to 65.Fn re_comp . 66.Pp 67The 68.Fn re_comp 69function 70returns 0 if the string 71.Fa s 72was compiled successfully; otherwise a string containing an 73error message is returned. 74If 75.Fn re_comp 76is passed 0 or a null string, it returns without changing the currently 77compiled regular expression. 78.Pp 79The 80.Fn re_exec 81function 82returns 1 if the string 83.Fa s 84matches the last compiled regular expression, 0 if the string 85.Fa s 86failed to match the last compiled regular expression, and \-1 if the compiled 87regular expression was invalid (indicating an internal error). 88.Pp 89The strings passed to both 90.Fn re_comp 91and 92.Fn re_exec 93may have trailing or embedded newline characters; 94they are terminated by 95.Dv NUL Ns s . 96The regular expressions recognized are described in the manual entry for 97.Xr ed 1 , 98given the above difference. 99.Sh DIAGNOSTICS 100The 101.Fn re_exec 102function 103returns \-1 for an internal error. 104.Pp 105The 106.Fn re_comp 107function 108returns one of the following strings if an error occurs: 109.Bd -unfilled -offset indent 110No previous regular expression, 111Regular expression too long, 112unmatched \e(, 113missing ], 114too many \e(\e) pairs, 115unmatched \e). 116.Ed 117.Sh SEE ALSO 118.Xr ed 1 , 119.Xr egrep 1 , 120.Xr ex 1 , 121.Xr fgrep 1 , 122.Xr grep 1 , 123.Xr regex 3 124.Sh HISTORY 125The 126.Fn re_comp 127and 128.Fn re_exec 129functions appeared in 130.Bx 4.0 . 131