re_comp(3) — Linux manual page

re_comp(3)              Library Functions Manual              re_comp(3)

NAME         top

       re_comp, re_exec - BSD regex functions

LIBRARY         top

       Standard C library (libc, -lc)

SYNOPSIS         top

       #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         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 │
       └───────────────────────────────────┴───────────────┴───────────┘

STANDARDS         top

       None.

HISTORY         top

       4.3BSD.

       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 the man-pages (Linux kernel and C library
       user-space interface documentation) project.  Information about
       the project can be found at 
       ⟨https://www.kernel.org/doc/man-pages/⟩.  If you have a bug report
       for this manual page, see
       ⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
       This page was obtained from the tarball man-pages-6.9.1.tar.gz
       fetched from
       ⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
       2024-06-26.  If you discover any rendering problems in this HTML
       version of the page, or you believe there is a better or more up-
       to-date source for the page, or you have corrections or
       improvements to the information in this COLOPHON (which is not
       part of the original manual page), send a mail to
       man-pages@man7.org

Linux man-pages 6.9.1          2024-05-02                     re_comp(3)

HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH.