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/sys.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'include/kernel/sys.h') diff --git a/include/kernel/sys.h b/include/kernel/sys.h index ba2dc0c..32788b1 100644 --- a/include/kernel/sys.h +++ b/include/kernel/sys.h @@ -5,9 +5,9 @@ extern int sys_time(void); extern int sys_getpid(void); extern int sys_getpdir(void); extern int sys_signal(void); -extern int sys_rsputs(void); extern int sys_alarm(void); extern int sys_pause(void); +extern int sys_ctty(void); extern int sys_dummy(void); syscall_t call_table[256] = { @@ -16,9 +16,9 @@ syscall_t call_table[256] = { [2] = &sys_getpid, [3] = &sys_getpdir, [4] = &sys_signal, - [5] = &sys_rsputs, - [6] = &sys_alarm, - [7] = &sys_pause, + [5] = &sys_alarm, + [6] = &sys_pause, + [7] = &sys_ctty, [8] = &sys_dummy, [9] = &sys_dummy, [10] = &sys_dummy, -- cgit v1.3