libbb: introduce and use xmalloc_ttyname (-32 in bss).
ash: small code shrink
text data bss dec hex filename
793669 504 7524 801697 c3ba1 busybox_old
793659 504 7492 801655 c3b77 busybox_unstripped
diff --git a/loginutils/su.c b/loginutils/su.c
index e7e0001..de8c18d 100644
--- a/loginutils/su.c
+++ b/loginutils/su.c
@@ -44,7 +44,7 @@
But getlogin can fail -- usually due to lack of utmp entry.
in this case resort to getpwuid. */
old_user = xstrdup(USE_FEATURE_UTMP(getlogin() ? : ) (pw = getpwuid(cur_uid)) ? pw->pw_name : "");
- tty = ttyname(2) ? : "none";
+ tty = xmalloc_ttyname(2) ? : "none";
openlog(applet_name, 0, LOG_AUTH);
}