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.\" 34.Dd June 4, 1993 35.Dt RE_COMP 3 36.Os 37.Sh NAME 38.Nm re_comp , 39.Nm re_exec 40.Nd regular expression handler 41.Sh SYNOPSIS 42.Fd #include <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 48This interface is made obsolete by 49.Xr regex 3 . 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. If 68.Fn re_comp 69is passed 0 or a null string, it returns without changing the currently 70compiled regular expression. 71.Pp 72The 73.Fn re_exec 74function 75returns 1 if the string 76.Fa s 77matches the last compiled regular expression, 0 if the string 78.Fa s 79failed to match the last compiled regular expression, and \-1 if the compiled 80regular expression was invalid (indicating an internal error). 81.Pp 82The strings passed to both 83.Fn re_comp 84and 85.Fn re_exec 86may have trailing or embedded newline characters; 87they are terminated by 88.Dv NUL Ns s. 89The regular expressions recognized are described in the manual entry for 90.Xr ed 1 , 91given the above difference. 92.Sh DIAGNOSTICS 93The 94.Fn re_exec 95function 96returns \-1 for an internal error. 97.Pp 98The 99.Fn re_comp 100function 101returns one of the following strings if an error occurs: 102.Bd -unfilled -offset indent 103No previous regular expression, 104Regular expression too long, 105unmatched \e(, 106missing ], 107too many \e(\e) pairs, 108unmatched \e). 109.Ed 110.Sh SEE ALSO 111.Xr ed 1 , 112.Xr ex 1 , 113.Xr egrep 1 , 114.Xr fgrep 1 , 115.Xr grep 1 , 116.Xr regex 3 117.Sh HISTORY 118The 119.Fn re_comp 120and 121.Fn re_exec 122functions appeared in 123.Bx 4.0 . 124