eliminate mk*temp dependency on snprintf

this helps some tiny programs be even more tiny, and barly increases
code size even if both are used.

diff --git a/src/temp/mktemp.c b/src/temp/mktemp.c
index 654a279..b04f5de 100644 (file)
--- a/src/temp/mktemp.c
+++ b/src/temp/mktemp.c
@@ -11,9 +11,9 @@
 char *__mktemp(char *template)
 {
        struct timespec ts;
-       size_t l = strlen(template);
+       size_t i, l = strlen(template);
        int retries = 10000;
-       unsigned long r;
+       unsigned long r, t;
 
        if (l < 6 || strcmp(template+l-6, "XXXXXX")) {
                errno = EINVAL;
@@ -23,7 +23,8 @@ char *__mktemp(char *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);
+               for (t=r, i=1; i<=6; i++, t>>=4)
+                       template[l-i] = 'A'+(t&15);
                if (access(template, F_OK) < 0) return template;
                r = r * 1103515245 + 12345;
        }