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
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Referenced By
The man page re_exec(3) is an alias of re_comp(3).