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