1 files changed, 24 insertions, 0 deletions
diff --git a/src/libunixonacid/mkdir_unique.c b/src/libunixonacid/mkdir_unique.c
new file mode 100644
index 0000000..523ecef
--- /dev/null
+++ b/src/libunixonacid/mkdir_unique.c
@@ -0,0 +1,24 @@
+/* ISC license. */
+
+#include <sys/stat.h>
+#include <skalibs/stralloc.h>
+#include <skalibs/random.h>
+#include <skalibs/unix-transactional.h>
+
+int mkdir_unique (stralloc *sa, char const *fn, unsigned int mode)
+{
+  unsigned int base = sa->len ;
+  int wasnull = !sa->s ;
+  if (!stralloc_cats(sa, fn)) return 0 ;
+  if (!stralloc_cats(sa, "/mkdir_unique")) goto fail ;
+  if (random_sauniquename(sa, 8) < 0) goto fail ;
+  if (!stralloc_0(sa)) goto fail ;
+  if (mkdir(sa->s + base, mode) < 0) goto fail ;
+  sa->len-- ;
+  return 1 ;
+
+ fail:
+  if (wasnull) stralloc_free(sa) ;
+  else sa->len = base ;
+  return 0 ;
+}