re_comp(3) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ATTRIBUTES | CONFORMING TO | NOTES | SEE ALSO | COLOPHON

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

NAME         top

       re_comp, re_exec - BSD regex functions

SYNOPSIS         top

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

       char *re_comp(const char *regex);
       int re_exec(const char *string);

DESCRIPTION         top

       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         top

       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         top

       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         top

       4.3BSD.

NOTES         top

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

SEE ALSO         top

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

COLOPHON         top

       This page is part of release 5.13 of the Linux man-pages project.
       A description of the project, information about reporting bugs,
       and the latest version of this page, can be found at
       https://www.kernel.org/doc/man-pages/.

GNU                            2021-03-22                     RE_COMP(3)