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/stdio.h | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) (limited to 'include/stdio.h') diff --git a/include/stdio.h b/include/stdio.h index 94cf227..824eb31 100644 --- a/include/stdio.h +++ b/include/stdio.h @@ -3,12 +3,15 @@ #include +#define EOF -1 + int puts(char*); -int rsputs(char*); int printf(char*, ...); -int rsprintf(char*, ...); +int sprintf(char*, char*, ...); int vsprintf(char*, char*, va_list); +int ctty(int ctty); + #endif -- cgit v1.3