mkostemp: fix implementation

mkostemp(char *template, int flags) generates a unique temporary
filename from a template.  The flags parameter accepts three of
the same flags as open(2): O_APPEND, O_CLOEXEC, and O_SYNC.  The
current implementation of mkostemp(3) does not respect the flags
and in fact confuses the flags with the file mode which should
always be S_IRUSR | S_IWUSR.  This patch corrects this issue.

Signed-off-by: Anthony G. Basile <blueness@gentoo.org>

1 files changed, 22 insertions, 0 deletions

diff --git a/test/stdlib/test-mkostemp-child.c b/test/stdlib/test-mkostemp-child.c
new file mode 100644
index 000000000..708bd80a1
--- /dev/null
+++ b/test/stdlib/test-mkostemp-child.c
@@ -0,0 +1,22 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+int main(int argc, char *argv[]) {
+    int fd;
+
+    /* This file gets built and run as a test, but its
+     * really just a helper for test-mkostemp-O_CLOEXEC.c.
+     * So, we'll always return succcess.
+     */
+    if(argc != 2)
+        exit(EXIT_SUCCESS);
+
+    sscanf(argv[1], "%d", &fd);
+
+    if(write(fd, "test\0", 5) == -1)
+        ; /* Don't Panic!  Failure is okay here. */
+
+    close(fd);
+    exit(EXIT_SUCCESS);
+}