NAME memcmp - compare byte string CONTENTS Library Synopsis Description Return Values See Also Standards LIBRARY .Lb libc SYNOPSIS .In string.h int memcmp "const void *b1" "const void *b2" "size_t len" DESCRIPTION The memcmp function compares byte string b1 against byte string b2. Both strings are assumed to be len bytes long. RETURN VALUES The memcmp function returns zero if the two strings are identical, otherwise returns the difference between the first two differing bytes (treated as unsigned char values, so that '\200' is greater than '\0', for example). Zero-length strings are always identical. SEE ALSO bcmp(3), strcasecmp(3), strcmp(3), strcoll(3), strxfrm(3) STANDARDS