remove ugly prng from mk*temp and just re-poll time on retry

[musl] / src / temp / mktemp.c

diff --git a/src/temp/mktemp.c b/src/temp/mktemp.c
index 654a279..c0e06f5 100644 (file)
--- a/src/temp/mktemp.c
+++ b/src/temp/mktemp.c
@@ -11,7 +11,7 @@
 char *__mktemp(char *template)
 {
        struct timespec ts;
-       size_t l = strlen(template);
+       size_t i, l = strlen(template);
        int retries = 10000;
        unsigned long r;
 
@@ -20,12 +20,12 @@ char *__mktemp(char *template)
                *template = 0;
                return template;
        }
-       clock_gettime(CLOCK_REALTIME, &ts);
-       r = ts.tv_nsec + (uintptr_t)&ts / 16 + (uintptr_t)template;
        while (retries--) {
-               snprintf(template+l-6, 7, "%06lX", r & 0xffffff);
+               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);
                if (access(template, F_OK) < 0) return template;
-               r = r * 1103515245 + 12345;
        }
        *template = 0;
        errno = EEXIST;