fix broken ttyname[_r] (failure to null-terminate result)

[musl] / src / exit / exit.c

diff --git a/src/exit/exit.c b/src/exit/exit.c
index 1ff19db..e4aeaf1 100644 (file)
--- a/src/exit/exit.c
+++ b/src/exit/exit.c
@@ -2,29 +2,30 @@
 #include <unistd.h>
 #include <stdio.h>
 #include "libc.h"
+#include "atomic.h"
+#include "syscall.h"
 
 static void dummy()
 {
 }
 
-/* __towrite.c and atexit.c override these */
+/* __toread.c, __towrite.c, and atexit.c override these */
 weak_alias(dummy, __funcs_on_exit);
-weak_alias(dummy, __fflush_on_exit);
+weak_alias(dummy, __flush_on_exit);
+weak_alias(dummy, __seek_on_exit);
 
 void exit(int code)
 {
        static int lock;
 
        /* If more than one thread calls exit, hang until _Exit ends it all */
-       LOCK(&lock);
+       while (a_swap(&lock, 1)) __syscall(SYS_pause);
 
-       /* Only do atexit & stdio flush if they were actually used */
        __funcs_on_exit();
-       __fflush_on_exit();
-
-       /* Destructor s**t is kept separate from atexit to avoid bloat */
        if (libc.fini) libc.fini();
        if (libc.ldso_fini) libc.ldso_fini();
+       __flush_on_exit();
+       __seek_on_exit();
 
        _Exit(code);
        for(;;);