- if (__syscall(SYS_access, P_tmpdir, R_OK|W_OK|X_OK) != 0)
- return NULL;
-
- do {
- __syscall(SYS_clock_gettime, CLOCK_REALTIME, &ts, 0);
- n = ts.tv_nsec ^ (unsigned)&s ^ (unsigned)s;
- snprintf(s, L_tmpnam, "/tmp/t%x-%x", a_fetch_add(&index, 1), n);
- } while (!__syscall(SYS_access, s, F_OK) && try++<MAXTRIES);
- return try==MAXTRIES ? 0 : s;
+char *tmpnam(char *buf)
+{
+ static char internal[L_tmpnam];
+ char s[] = "/tmp/tmpnam_XXXXXX";
+ int try;
+ int r;
+ for (try=0; try<MAXTRIES; try++) {
+ __randname(s+12);
+#ifdef SYS_lstat
+ r = __syscall(SYS_lstat, s, &(struct stat){0});
+#else
+ r = __syscall(SYS_fstatat, AT_FDCWD, s,
+ &(struct stat){0}, AT_SYMLINK_NOFOLLOW);
+#endif
+ if (r == -ENOENT) return strcpy(buf ? buf : internal, s);
+ }
+ return 0;