fix invalid free of duplocale object when malloc has been replaced

[musl] / src / unistd / ctermid.c

diff --git a/src/unistd/ctermid.c b/src/unistd/ctermid.c
index c238905..1612770 100644 (file)
--- a/src/unistd/ctermid.c
+++ b/src/unistd/ctermid.c
@@ -1,24 +1,7 @@
 #include <stdio.h>
-#include <stdlib.h>
 #include <string.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <limits.h>
-#include "syscall.h"
 
 char *ctermid(char *s)
 {
-       static char *s2;
-       int fd;
-       if (!s) {
-               if (!s2) s2 = malloc(L_ctermid);
-               s = s2;
-       }
-       fd = open("/dev/tty", O_WRONLY | O_NOCTTY | O_CLOEXEC);
-       if (fd < 0)
-               return strcpy(s, "");
-       if (ttyname_r(fd, s, L_ctermid))
-               strcpy(s, "");
-       __syscall(SYS_close, fd);
-       return s;
+       return s ? strcpy(s, "/dev/tty") : "/dev/tty";
 }