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