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       strncpy.3 (858B)
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            1 .TH strncpy 3
            2 .SH NAME
            3 strncpy - copy bounded-length string
            4 .SH SYNOPSIS
            5 #include <string.h>
            6 
            7 char *strncpy(char *restrict s1, const char *restrict s2, size_t n)
            8 .SH DESCRIPTION
            9 The
           10 .BR strncpy ()
           11 function copies not more than
           12 .I n
           13 characters
           14 (characters that follow a null character are not copied)
           15 from the array pointed to by
           16 .I s2
           17 into the array pointed to by
           18 .IR s1 .
           19 .PP
           20 If copying takes place between objects that overlap,
           21 the behaviour is undefined.
           22 .PP
           23 If the array pointed to by
           24 .I s2
           25 is a string that is shorter than
           26 .I n
           27 characters,
           28 null characters are appended
           29 to the copy in the array pointed to by
           30 .IR s1 ,
           31 until n characters in all have been written.
           32 .PP
           33 The function shall not copy anything if
           34 .I n
           35 is equal to 0.
           36 .SH RETURN VALUE
           37 The
           38 .BR strcpy ()
           39 function shall return the pointer
           40 .IR s1 .
           41 .SH STANDARDS
           42 ISO/IEC 9899:1999 Section 7.21.2.4