NAME

       strncpy - copy part of a string

SYNOPSIS

       #include <string.h>

       char *strncpy(char *restrict s1, const char *restrict s2, size_t n);

DESCRIPTION

       The strncpy() function shall copy not more than n bytes (bytes that follow a null byte are
       not copied) from the array pointed to by s2 to the array pointed to  by  s1.   If  copying
       takes place between objects that overlap, the behavior is undefined.

       If  the  array pointed to by s2 is a string that is shorter than n bytes, null bytes shall
       be appended to the copy in the array pointed to by s1, until n bytes in all are written.

RETURN VALUE

       The strncpy() function shall return s1; no return value is reserved to indicate an error.

ERRORS

       No errors are defined.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       Character  movement  is  performed  differently  in  different   implementations.    Thus,
       overlapping moves may yield surprises.

       If there is no null byte in the first n bytes of the array pointed to by s2, the result is
       not null-terminated.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       strcpy() , the Base Definitions volume of IEEE Std 1003.1-2001, <string.h>

COPYRIGHT

       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
       original Standard can be obtained online at http://www.opengroup.org/unix/online.html .