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

based on patch contributed by Anthony G. Basile (blueness)

some issues remain with the filename generation algorithm and other
small bugs, but this patch has been sitting around long enough that I
feel it's best to get it committed and then work out any remaining
issues.

1 files changed, 4 insertions, 10 deletions

diff --git a/src/temp/mktemp.c b/src/temp/mktemp.c
index c0e06f5e..ed2c103e 100644
--- a/src/temp/mktemp.c
+++ b/src/temp/mktemp.c
@@ -1,17 +1,14 @@
 #include <string.h>
-#include <stdio.h>
-#include <stdlib.h>
 #include <fcntl.h>
 #include <unistd.h>
 #include <errno.h>
-#include <time.h>
-#include <stdint.h>
 #include "libc.h"
 
+char *__randname(char *);
+
 char *__mktemp(char *template)
 {
-	struct timespec ts;
-	size_t i, l = strlen(template);
+	size_t l = strlen(template);
 	int retries = 10000;
 	unsigned long r;
 
@@ -21,10 +18,7 @@ char *__mktemp(char *template)
 		return template;
 	}
 	while (retries--) {
-		clock_gettime(CLOCK_REALTIME, &ts);
-		r = ts.tv_nsec + (uintptr_t)&ts / 16 + (uintptr_t)template;
-		for (i=1; i<=6; i++, r>>=4)
-			template[l-i] = 'A'+(r&15);
+		__randname(template+l-6);
 		if (access(template, F_OK) < 0) return template;
 	}
 	*template = 0;