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-rw-r--r--src/temp/mkdtemp.c24
1 files changed, 14 insertions, 10 deletions
diff --git a/src/temp/mkdtemp.c b/src/temp/mkdtemp.c
index 76140c77..195e9cba 100644
--- a/src/temp/mkdtemp.c
+++ b/src/temp/mkdtemp.c
@@ -8,19 +8,23 @@
#include <sys/stat.h>
#include "libc.h"
-char *__mktemp(char *);
+char *__randname(char *);
char *mkdtemp(char *template)
{
- int retries = 100, t0 = *template;
- while (retries--) {
- if (!*__mktemp(template)) return 0;
- if (!mkdir(template, 0700)) return template;
- if (errno != EEXIST) return 0;
- /* this is safe because mktemp verified
- * that we have a valid template string */
- template[0] = t0;
- strcpy(template+strlen(template)-6, "XXXXXX");
+ size_t l = strlen(template);
+ int retries = 100;
+
+ if (l<6 || memcmp(template+l-6, "XXXXXX", 6)) {
+ errno = EINVAL;
+ return 0;
}
+
+ do {
+ __randname(template+l-6);
+ if (!mkdir(template, 0700)) return template;
+ } while (--retries && errno == EEXIST);
+
+ memcpy(template+l-6, "XXXXXX", 6);
return 0;
}