ref: fe2b29d13bac3ab3c16490b859f452201c6b4c77
dir: /src/libc/stdio/fflush.c/
#include <stdio.h> #include "../libc.h" #undef fflush int fflush(FILE *fp) { int err; if (fp) return _flsbuf(fp); err = 0; for (fp = __iob; fp < &__iob[FOPEN_MAX]; ++fp) { if ((fp->flags & _IOWRITE) == 0 && _flsbuf(fp)) err = EOF; } return err; }