re_exec(3) Linux Man Page - System Grab Bag

Name

re_comp, re_exec - BSD regex functions

Library

Standard C library ( libc ", " -lc )

Synopsis

#define _REGEX_RE_COMP 
#include <sys/types.h> 
#include <regex.h> 
[[deprecated]] char *re_comp(const char * regex );
[[deprecated]] int re_exec(const 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

For an explanation of the terms used in this section, see attributes(7). allbox; lbx lb lb T{ re_comp()re_exec()

Interface	Attribute	Value
T}	Thread safety	MT-Unsafe

Standards

None.

History

4.3BSD.

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