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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
COLOPHON
       This  page  is  part of release 4.15 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                               2017-09-15                        RE_COMP(3)