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 at- tributes(7). ┌──────────────────────────────────────────┬───────────────┬───────────┐ │Interface │ Attribute │ Value │ ├──────────────────────────────────────────┼───────────────┼───────────┤ │re_comp(), re_exec() │ Thread safety │ MT-Unsafe │ └──────────────────────────────────────────┴───────────────┴───────────┘ STANDARDS 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 Linux man-pages 6.03 2022-12-15 re_comp(3)
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