hare

commit 431a3d1a5038ba6d3f93e5e6951189ed51266442
parent bf9678fa3d7e30201ce1ced4a1cc0507cb72f1a8
Author: Drew DeVault <sir@cmpwn.com>
Date:   Thu,  4 Nov 2021 15:02:55 +0100

rt+linux: use dup3 for dup2 implementation

dup2 is not available on ARM et al.

Signed-off-by: Drew DeVault <sir@cmpwn.com>

Diffstat:
M
rt/+linux/syscalls.ha
 | 
7
++++++-

1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/rt/+linux/syscalls.ha b/rt/+linux/syscalls.ha
@@ -160,7 +160,12 @@ export fn dup(fd: int) (int | errno) = {
 };
 
 export fn dup2(oldfd: int, newfd: int) (int | errno) = {
-	return wrap_return(syscall2(SYS_dup2, oldfd: u64, newfd: u64))?: int;
+	return dup3(oldfd, newfd, 0);
+};
+
+export fn dup3(oldfd: int, newfd: int, flags: int) (int | errno) = {
+	return wrap_return(syscall3(SYS_dup3,
+		oldfd: u64, newfd: u64, flags: u64))?: int;
 };
 
 export fn close(fd: int) (void | errno) = {