| .\" Copyright (C), 1995, Graeme W. Wilford. (Wilf.) |
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| .\" Wed Jun 14 16:10:28 BST 1995 Wilf. (G.Wilford@@ee.surrey.ac.uk) |
| .\" |
| .TH RE_COMP 3 2021-03-22 "GNU" "Linux Programmer's Manual" |
| .SH NAME |
| re_comp, re_exec \- BSD regex functions |
| .SH SYNOPSIS |
| .nf |
| .B #define _REGEX_RE_COMP |
| .B #include <sys/types.h> |
| .B #include <regex.h> |
| .PP |
| .BI "char *re_comp(const char *" regex ); |
| .BI "int re_exec(const char *" string ); |
| .fi |
| .SH DESCRIPTION |
| .BR re_comp () |
| is used to compile the null-terminated regular expression pointed to by |
| .IR regex . |
| The compiled pattern occupies a static area, the pattern buffer, |
| which is overwritten by subsequent use of |
| .BR re_comp (). |
| If |
| .I regex |
| is NULL, |
| no operation is performed and the pattern buffer's contents are not |
| altered. |
| .PP |
| .BR re_exec () |
| is used to assess whether the null-terminated string pointed to by |
| .I string |
| matches the previously compiled |
| .IR regex . |
| .SH RETURN VALUE |
| .BR re_comp () |
| returns NULL on successful compilation of |
| .I regex |
| otherwise it returns a pointer to an appropriate error message. |
| .PP |
| .BR re_exec () |
| returns 1 for a successful match, zero for failure. |
| .SH ATTRIBUTES |
| For an explanation of the terms used in this section, see |
| .BR attributes (7). |
| .ad l |
| .nh |
| .TS |
| allbox; |
| lbx lb lb |
| l l l. |
| Interface Attribute Value |
| T{ |
| .BR re_comp (), |
| .BR re_exec () |
| T} Thread safety MT-Unsafe |
| .TE |
| .hy |
| .ad |
| .sp 1 |
| .SH CONFORMING TO |
| 4.3BSD. |
| .SH NOTES |
| These functions are obsolete; the functions documented in |
| .BR regcomp (3) |
| should be used instead. |
| .SH SEE ALSO |
| .BR regcomp (3), |
| .BR regex (7), |
| GNU regex manual |
