From af9eb9114c2f8700d4315eaa1e2d637c2aaaf210 Mon Sep 17 00:00:00 2001 From: Robert Morris Date: Thu, 16 Jul 2020 11:38:08 -0400 Subject: make "echo hello > x" truncate file x. --- kernel/sysfile.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'kernel/sysfile.c') diff --git a/kernel/sysfile.c b/kernel/sysfile.c index 7768d20..015c942 100644 --- a/kernel/sysfile.c +++ b/kernel/sysfile.c @@ -341,6 +341,10 @@ sys_open(void) f->readable = !(omode & O_WRONLY); f->writable = (omode & O_WRONLY) || (omode & O_RDWR); + if((omode & O_TRUNC) && ip->type == T_FILE){ + itrunc(ip); + } + iunlock(ip); end_op(); -- cgit v1.2.3