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STRCMP(3) Library Functions Manual STRCMP(3)

strcmp — compare strings

#include <string.h>

int
strcmp(const char *s1, const char *s2);

int
strncmp(const char *s1, const char *s2, size_t len);

The () and () functions lexicographically compare the null-terminated strings s1 and s2.

The strcmp() and strncmp() return an integer greater than, equal to, or less than 0, according as the string s1 is greater than, equal to, or less than the string s2. The comparison is done using unsigned characters, so that ‘\200’ is greater than ‘\0’.

The strncmp() compares not more than len characters.

bcmp(3), memcmp(3), strcasecmp(3), strcoll(3), strxfrm(3)

The strcmp() and strncmp() functions conform to ANSI X3.159-1989 (“ANSI C89”).

4.4BSD-Lite2 June 4, 1993 STRCMP(3)