1 files changed, 18 insertions, 0 deletions
diff --git a/libc-top-half/musl/src/process/posix_spawn_file_actions_adddup2.c b/libc-top-half/musl/src/process/posix_spawn_file_actions_adddup2.c
new file mode 100644
index 0000000..addca4d
--- /dev/null
+++ b/libc-top-half/musl/src/process/posix_spawn_file_actions_adddup2.c
@@ -0,0 +1,18 @@
+#include <spawn.h>
+#include <stdlib.h>
+#include <errno.h>
+#include "fdop.h"
+
+int posix_spawn_file_actions_adddup2(posix_spawn_file_actions_t *fa, int srcfd, int fd)
+{
+	if (srcfd < 0 || fd < 0) return EBADF;
+	struct fdop *op = malloc(sizeof *op);
+	if (!op) return ENOMEM;
+	op->cmd = FDOP_DUP2;
+	op->srcfd = srcfd;
+	op->fd = fd;
+	if ((op->next = fa->__actions)) op->next->prev = op;
+	op->prev = 0;
+	fa->__actions = op;
+	return 0;
+}