avoid limited space of random temp file names if clock resolution is low

this is not an issue that was actually hit, but I noticed it during
previous changes to __randname: if the resolution of tv_nsec is too
low, the space of temp file names obtainable by a thread could
plausibly be exhausted. mixing in tv_sec avoids this.

diff --git a/src/temp/__randname.c b/src/temp/__randname.c
index 1425bad..e9b970f 100644 (file)
--- a/src/temp/__randname.c
+++ b/src/temp/__randname.c
@@ -11,7 +11,7 @@ char *__randname(char *template)
        unsigned long r;
 
        __clock_gettime(CLOCK_REALTIME, &ts);
-       r = ts.tv_nsec + __pthread_self()->tid * 65537UL;
+       r = ts.tv_sec + ts.tv_nsec + __pthread_self()->tid * 65537UL;
        for (i=0; i<6; i++, r>>=5)
                template[i] = 'A'+(r&15)+(r&16)*2;