re_comp(3) — Linux manual pages

Linux manual pages	Section 3: Subroutines

Name

re_comp, re_exec — BSD regex functions

Synopsis

#define _REGEX_RE_COMP
#include <sys/types.h>
#include <regex.h>

char *re_comp( char *regex);

int re_exec( char *string);

DESCRIPTION

re_comp() is used to compile the null-terminated regular expression pointed to by regex. The compiled pattern occupies a static area, the pattern buffer, which is overwritten by subsequent use of re_comp(). If regex is NULL, no operation is performed and the pattern buffer's contents are not altered.

re_exec() is used to assess whether the null-terminated string pointed to by string matches the previously compiled regex.

RETURN VALUE

re_comp() returns NULL on successful compilation of regex otherwise it returns a pointer to an appropriate error message.

re_exec() returns 1 for a successful match, zero for failure.

ATTRIBUTES

Multithreading (see pthreads(7))

The re_comp() and re_exec() functions are not thread-safe.

CONFORMING TO

4.3BSD.

NOTES

These functions are obsolete; the functions documented in regcomp(3) should be used instead.

COLOPHON

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