NAME regcomp, regexec, regerror, regfree - POSIX regex functions LIBRARY Standard C library ( libc , -lc ) SYNOPSIS ... Nullable restrict . nmatch ], int eflags ); size_t regerror(…NAME regcomp, regexec, regerror, regfree - POSIX regex functions LIBRARY Standard C library ( libc , -lc ) SYNOPSIS ... Nullable restrict . nmatch ], int eflags ); size_t regerror(…NAME regcomp, regexec, regerror, regfree - POSIX regex functions LIBRARY Standard C library ( libc , -lc ) SYNOPSIS ... Nullable restrict . nmatch ], int eflags ); size_t regerror(…NAME regcomp, regexec, regerror, regfree - POSIX regex functions LIBRARY Standard C library ( libc , -lc ) SYNOPSIS ... Nullable restrict . nmatch ], int eflags ); size_t regerror(…NAME regcomp, regexec, regerror, regfree - POSIX regex functions LIBRARY Standard C library ( libc , -lc ) SYNOPSIS ... Nullable restrict . nmatch ], int eflags ); size_t regerror(…NAME regcomp, regexec, regerror, regfree - POSIX regex functions LIBRARY Standard C library ( libc , -lc ) SYNOPSIS ... Nullable restrict . nmatch ], int eflags ); size_t regerror(…NAME regcomp, regexec, regerror, regfree - POSIX regex functions LIBRARY Standard C library ( libc , -lc ) SYNOPSIS ... Nullable restrict . nmatch ], int eflags ); size_t regerror(…NAME regcomp, regexec, regerror, regfree - POSIX regex functions LIBRARY Standard C library ( libc , -lc ) SYNOPSIS ... Nullable restrict . nmatch ], int eflags ); size_t regerror(…following functions are present: regcomp () regerror () regexec () regfree () --- - _POSIX_SAVED_IDS - _SC_SAVED