1 files changed, 34 insertions, 0 deletions
diff --git a/src/libunixonacid/dd_open_write.c b/src/libunixonacid/dd_open_write.c
new file mode 100644
index 0000000..efee60f
--- /dev/null
+++ b/src/libunixonacid/dd_open_write.c
@@ -0,0 +1,34 @@
+/* ISC license. */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <errno.h>
+#include <skalibs/stralloc.h>
+#include <skalibs/djbunix.h>
+#include <skalibs/random.h>
+#include <skalibs/unix-transactional.h>
+
+int dd_open_write (dirdescriptor_t_ref dd, char const *lnkfn, unsigned int mode)
+{
+  dirdescriptor_t d = DIRDESCRIPTOR_ZERO ;
+  d.lnkfn = lnkfn ;
+  if (!stralloc_cats(&d.new, lnkfn)) return 0 ;
+  if (random_sauniquename(&d.new, 8) < 0) goto fail ;
+  if (!stralloc_0(&d.new)) goto fail ;
+  if (mkdir(d.new.s, mode) < 0) goto fail ;
+  d.fd = open_read(d.new.s) ;
+  if (d.fd < 0)
+  {
+    register int e = errno ;
+    rmdir(d.new.s) ;
+    errno = e ;
+    goto fail ;
+  }
+  *dd = d ;
+  return 1 ;
+
+ fail:
+  stralloc_free(&d.new) ;
+  return 0 ;
+}