xv6-riscv-kernel/kernel/fcntl.h

#define O_RDONLY  0x000
#define O_WRONLY  0x001
#define O_RDWR    0x002
#define O_CREATE  0x200
#define O_TRUNC   0x400
low-level keyboard input (not hooked up to /dev yet) fix acquire() to cli() before incrementing nlock make T_SYSCALL a trap gate, not an interrupt gate sadly, various crashes if you hold down a keyboard key... 2006-08-10 04:07:10 +02:00			`#define O_RDONLY 0x000`
			`#define O_WRONLY 0x001`
			`#define O_RDWR 0x002`
nit 2007-08-28 06:13:24 +02:00			`#define O_CREATE 0x200`
make "echo hello > x" truncate file x. 2020-07-16 17:38:08 +02:00			`#define O_TRUNC 0x400`