STRNCMP(P) POSIX Programmer's Manual STRNCMP(P)
strncmp - compare part of two strings
int strncmp(const char *s1, const char *s2, size_t n);
The strncmp() function shall compare not more than n bytes (bytes that follow a null byte
are not compared) from the array pointed to by s1 to the array pointed to by s2.
The sign of a non-zero return value is determined by the sign of the difference between
the values of the first pair of bytes (both interpreted as type unsigned char) that differ
in the strings being compared.
Upon successful completion, strncmp() shall return an integer greater than, equal to, or
less than 0, if the possibly null-terminated array pointed to by s1 is greater than, equal
to, or less than the possibly null-terminated array pointed to by s2 respectively.
No errors are defined.
The following sections are informative.
strcmp() , the Base Definitions volume of IEEE Std 1003.1-2001, <string.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE Std
1003.1, 2003 Edition, Standard for Information Technology -- Portable Operating System
Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by
the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the
event of any discrepancy between this version and the original IEEE and The Open Group
Standard, the original IEEE and The Open Group Standard is the referee document. The orig-
inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .
IEEE/The Open Group 2003 STRNCMP(P)