ref: a57a6e511f15c02b4fd2690197b6f1333b171193
dir: /sys/src/ape/lib/ap/gen/strncpy.c/
#include <string.h> char* strncpy(char *s1, const char *s2, size_t n) { int i; char *os1; os1 = s1; for(i = 0; i < n; i++) if((*s1++ = *s2++) == 0) { while(++i < n) *s1++ = 0; return os1; } return os1; }