mirror of https://github.com/mkerrisk/man-pages
74 lines
2.3 KiB
Groff
74 lines
2.3 KiB
Groff
.\" Copyright (C), 1995, Graeme W. Wilford. (Wilf.)
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.\"
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.\" Permission is granted to make and distribute verbatim copies of this
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.\" manual provided the copyright notice and this permission notice are
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.\" preserved on all copies.
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.\"
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.\" Permission is granted to copy and distribute modified versions of this
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.\" manual under the conditions for verbatim copying, provided that the
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.\" entire resulting derived work is distributed under the terms of a
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.\" permission notice identical to this one.
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.\"
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.\" Since the Linux kernel and libraries are constantly changing, this
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.\" manual page may be incorrect or out-of-date. The author(s) assume no
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.\" responsibility for errors or omissions, or for damages resulting from
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.\" the use of the information contained herein. The author(s) may not
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.\" have taken the same level of care in the production of this manual,
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.\" which is licensed free of charge, as they might when working
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.\" professionally.
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.\"
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.\" Formatted or processed versions of this manual, if unaccompanied by
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.\" the source, must acknowledge the copyright and authors of this work.
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.\"
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.\" Wed Jun 14 16:10:28 BST 1995 Wilf. (G.Wilford@@ee.surrey.ac.uk)
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.\"
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.TH RE_COMP 3 1995-07-14 "GNU" "Linux Programmer's Manual"
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.SH NAME
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re_comp, re_exec \- BSD regex functions
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.SH SYNOPSIS
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.B #define _REGEX_RE_COMP
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.br
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.B #include <sys/types.h>
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.br
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.B #include <regex.h>
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.sp
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.BI "char *re_comp(char *" regex );
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.sp
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.BI "int re_exec(char *" string );
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.SH DESCRIPTION
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.BR re_comp ()
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is used to compile the null-terminated regular expression pointed to by
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.IR regex .
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The compiled pattern occupies a static area, the pattern buffer,
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which is overwritten by subsequent use of
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.BR re_comp ().
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If
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.I regex
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is NULL,
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no operation is performed and the pattern buffer's contents are not
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altered.
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.BR re_exec ()
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is used to assess whether the null-terminated string pointed to by
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.I string
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matches the previously compiled
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.IR regex .
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.SH "RETURN VALUE"
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.BR re_comp ()
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returns NULL on successful compilation of
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.I regex
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otherwise it returns a pointer to an appropriate error message.
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.BR re_exec ()
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returns 1 for a successful match, zero for failure.
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.SH "CONFORMING TO"
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4.3BSD
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.SH NOTES
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These functions are obsolete; the functions documented in
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.BR regcomp (3)
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should be used instead.
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.SH "SEE ALSO"
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.BR regcomp (3),
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.BR regex (7),
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GNU regex manual
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