regex.h — Regular expression functions

The regex.h header file contains definitions for the following regular expression functions.

regcomp()

regerror()

regexec()

regfree()

The regex.h header file declares the regex_t type, which can store a compiled regular expression.

The regex.h header file declares the following macros:

Values of the cflags parameter of the regcomp() function: REG_EXTENDED, REG_ICASE, REG_NEWLINE, REG_NOSUB
Values of the eflags parameter of the regexec() function: REG_NOTBOL, REG_NOTEOL
Values of the errcode parameter of the regerror() function: REG_*.