Minix1.1/usr/include/stdio.h

#define BUFSIZ  1024
#define NFILES  20
#define NULL       0
#define EOF     (-1)
#define CMASK   0377

#define READMODE     1
#define WRITEMODE    2
#define UNBUFF       4
#define _EOF         8
#define _ERR        16
#define IOMYBUF     32
#define PERPRINTF   64
#define STRINGS    128

#ifndef FILE

extern struct _io_buf {
    int     _fd;
    int     _count;
    int     _flags;
    char   *_buf;
    char   *_ptr;
}  *_io_table[NFILES];


#endif	/* FILE */

#define FILE struct _io_buf


#define stdin  (_io_table[0])	
#define stdout 	(_io_table[1])
#define stderr 	(_io_table[2])

#define getchar() 		getc(stdin)
#define putchar(c) 		putc(c,stdout)
#define puts(s)			fputs(s,stdout)
#define fgetc(f)		getc(f)
#define fputc(c,f)		putc(c,f)
#define feof(p) 		(((p)->_flags & _EOF) != 0)
#define ferror(p) 		(((p)->_flags & _ERR) != 0)
#define fileno(p) 		((p)->_fd)
#define rewind(f)		fseek(f, 0L, 0)
#define testflag(p,x)		((p)->_flags & (x))

/* If you want a stream to be flushed after each printf use:
 * 
 *	perprintf(stream);
 *
 * If you want to stop with this kind of buffering use:
 *
 *	noperprintf(stream);
 */

#define noperprintf(p)		((p)->_flags &= ~PERPRINTF)
#define perprintf(p)		((p)->_flags |= PERPRINTF)