path: root/src/linux/clone.c
diff options
authorBobby Bingham <>2014-02-06 22:11:22 -0600
committerBobby Bingham <>2014-02-09 20:07:43 -0600
commitfdf5f1b13123883ac1d5e298e5f32c7ed43578ce (patch)
tree56cddbaadf3f67c66a4914f4a3db7ae6d19a7aa6 /src/linux/clone.c
parent7ee48f7b69523c68768684551bc37ba05496c27f (diff)
clone: make clone a wrapper around __clone
The architecture-specific assembly versions of clone did not set errno on failure, which is inconsistent with glibc. __clone still returns the error via its return value, and clone is now a wrapper that sets errno as needed. The public clone has also been moved to src/linux, as it's not directly related to the pthreads API. __clone is called by pthread_create, which does not report errors via errno. Though not strictly necessary, it's nice to avoid clobbering errno here.
Diffstat (limited to 'src/linux/clone.c')
1 files changed, 19 insertions, 0 deletions
diff --git a/src/linux/clone.c b/src/linux/clone.c
new file mode 100644
index 00000000..b9e55945
--- /dev/null
+++ b/src/linux/clone.c
@@ -0,0 +1,19 @@
+#include <stdarg.h>
+#include <unistd.h>
+#include "pthread_impl.h"
+#include "syscall.h"
+int clone(int (*func)(void *), void *stack, int flags, void *arg, ...)
+ va_list ap;
+ pid_t *ptid, *ctid;
+ void *tls;
+ va_start(ap, arg);
+ ptid = va_arg(ap, pid_t *);
+ tls = va_arg(ap, void *);
+ ctid = va_arg(ap, pid_t *);
+ va_end(ap);
+ return __syscall_ret(__clone(func, stack, flags, arg, ptid, tls, ctid));