strncpy---counted copy string
#include <string.h> char *strncpy(char *dst, const char *src, size_t length);
strncpy copies not more than length characters from the
the string pointed to by src (including the terminating
null character) to the array pointed to by dst. If the
string pointed to by src is shorter than length
characters, null characters are appended to the destination
array until a total of length characters have been
This function returns the initial value of dst.
strncpy is ANSI C.
strncpy requires no supporting OS subroutines.
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