ref: a6f27269f135c7f8f4d3ce30c9e15769f7201ed9
dir: /src/libc/string/strncat.c/
#include <string.h> #undef strncat char * strncat(char *restrict s1, const char *restrict s2, size_t n) { char *ret = s1; while(*s1) ++s1; while (n-- > 0 && *s2) *s1++ = *s2++; *s1 = '\0'; return ret; }