X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Funistd%2Fdup3.c;h=f919f79125a624c4d47c1cb50a103f82e0ba576f;hb=7634101069db26b003adeec09c6aa14646363557;hp=1f7134b3dcbf7ea16390b543f38798c4b33549b0;hpb=892cafff665b44d238e3b664f61ca38dd965cba6;p=musl

diff --git a/src/unistd/dup3.c b/src/unistd/dup3.c
index 1f7134b3..f919f791 100644
--- a/src/unistd/dup3.c
+++ b/src/unistd/dup3.c
@@ -3,11 +3,11 @@
 #include <errno.h>
 #include <fcntl.h>
 #include "syscall.h"
-#include "libc.h"
 
 int __dup3(int old, int new, int flags)
 {
 	int r;
+#ifdef SYS_dup2
 	if (old==new) return __syscall_ret(-EINVAL);
 	if (flags & O_CLOEXEC) {
 		while ((r=__syscall(SYS_dup3, old, new, flags))==-EBUSY);
@@ -15,6 +15,9 @@ int __dup3(int old, int new, int flags)
 	}
 	while ((r=__syscall(SYS_dup2, old, new))==-EBUSY);
 	if (flags & O_CLOEXEC) __syscall(SYS_fcntl, new, F_SETFD, FD_CLOEXEC);
+#else
+	while ((r=__syscall(SYS_dup3, old, new, flags))==-EBUSY);
+#endif
 	return __syscall_ret(r);
 }