RE_COMP(3)                                                              Linux Programmer's Manual                                                             RE_COMP(3)

NAME
       re_comp, re_exec - BSD regex functions

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

       char *re_comp(const char *regex);
       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).

       ┌────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┬───────────────┬───────────┐
       │Interface                                                                                                                           │ Attribute     │ Value     │
       ├────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┼───────────────┼───────────┤
       │re_comp(), re_exec()                                                                                                                │ Thread safety │ MT-Unsafe │
       └────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┴───────────────┴───────────┘

CONFORMING TO
       4.3BSD.

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

SEE ALSO
       regcomp(3), regex(7), GNU regex manual

GNU                                                                            2021-03-22                                                                     RE_COMP(3)