add posix_spawn [f]chdir file actions

these are presently extensions, thus named with _np to match glibc and
other implementations that provide them; however they are likely to be
standardized in the future without the _np suffix as a result of
Austin Group issue 1208. if so, both names will be kept as aliases.

1 files changed, 17 insertions, 0 deletions

diff --git a/src/process/posix_spawn_file_actions_addfchdir.c b/src/process/posix_spawn_file_actions_addfchdir.c
new file mode 100644
index 00000000..436c683d
--- /dev/null
+++ b/src/process/posix_spawn_file_actions_addfchdir.c
@@ -0,0 +1,17 @@
+#include <spawn.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include "fdop.h"
+
+int posix_spawn_file_actions_addfchdir_np(posix_spawn_file_actions_t *fa, int fd)
+{
+	struct fdop *op = malloc(sizeof *op);
+	if (!op) return ENOMEM;
+	op->cmd = FDOP_FCHDIR;
+	op->fd = fd;
+	if ((op->next = fa->__actions)) op->next->prev = op;
+	op->prev = 0;
+	fa->__actions = op;
+	return 0;
+}