STRCASECMP(3) BSD Programmer's Manual STRCASECMP(3)
strcasecmp - compare strings, ignoring case
strcasecmp(const char *s1, const char *s2);
strncasecmp(const char *s1, const char *s2, size_t len);
The strcasecmp() and strncasecmp() functions compare the null-terminated
strings s1 and s2 and return an integer greater than, equal to, or less
than 0, according as s1 is lexicographically greater than, equal to, or
less than s2 after translation of each corresponding character to lower-
case. The strings themselves are not modified. The comparison is done
using unsigned characters, so that `\200' is greater than `\0'.
The strncasecmp() compares at most len characters.
bcmp(3), memcmp(3), strcmp(3), strcoll(3), strxfrm(3)
The strcasecmp() and strncasecmp() functions first appeared in 4.4BSD.
4.4BSD June 9, 1993 1