re_comp(3) — Linux manual page
re_comp(3) Library Functions Manual re_comp(3)
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).
┌───────────────────────────────────┬───────────────┬───────────┐
│ Interface │ Attribute │ Value │
├───────────────────────────────────┼───────────────┼───────────┤
│ re_comp(), re_exec() │ Thread safety │ MT-Unsafe │
└───────────────────────────────────┴───────────────┴───────────┘
STANDARDS
None.
HISTORY
4.3BSD.
These functions are obsolete; the functions documented in
regcomp(3) should be used instead.
SEE ALSO
regcomp(3), regex(7), GNU regex manual
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