add mkostemp, mkstemps, and mkostemps functions and reorganize temp internals

[musl] / src / temp / __randname.c

diff --git a/src/temp/__randname.c b/src/temp/__randname.c
new file mode 100644 (file)
index 0000000..b097576
--- /dev/null
+++ b/src/temp/__randname.c
@@ -0,0 +1,21 @@
+#include <string.h>
+#include <time.h>
+#include <stdint.h>
+
+int __clock_gettime(clockid_t, struct timespec *);
+
+/* This assumes that a check for the
+   template size has alrady been made */
+char *__randname(char *template)
+{
+       int i;
+       struct timespec ts;
+       unsigned long r;
+
+       __clock_gettime(CLOCK_REALTIME, &ts);
+       r = ts.tv_nsec*65537 ^ (uintptr_t)&ts / 16 + (uintptr_t)template;
+       for (i=0; i<6; i++, r>>=5)
+               template[i] = 'A'+(r&15)+(r&16)*2;
+
+       return template;
+}