From 8e933fac9fd068343bb602f13175c8d70a6c5768 Mon Sep 17 00:00:00 2001 From: Jake Mannens Date: Wed, 1 Aug 2018 02:27:57 +1000 Subject: Defined EOF as -1 in stdio.h. Implemented the sprintf() library function in lib/stdio.c which uses the vsprintf() function. Implemented a very primative controlling TTY for each process. This is achieved by a switch in the sys_puts system call which uses the 'ctty' element of the process' task structure to determine an appropriate I/O channel. A negative ctty value doesn't equate to any I/O channel effectively disabling the process' output. Added the sys_ctty system call which allows a process to set it's own ctty value. Removed the sys_rsputs system call. Output to serial is now performed by the process first setting it's ctty value to 1, then invoking sys_puts. --- include/kernel/sched.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/kernel/sched.h') diff --git a/include/kernel/sched.h b/include/kernel/sched.h index 6b0488e..4d2aca0 100644 --- a/include/kernel/sched.h +++ b/include/kernel/sched.h @@ -50,6 +50,7 @@ struct task_struct { pid_t pid; int state; uint32_t signal; + int ctty; unsigned int alarm; void *sig_handlers[NRSIG]; struct tss_struct tss; -- cgit v1.3