Libc-1044.40.1.tar.gz

[apple/libc.git] / stdlib / grantpt.c

diff --git a/stdlib/grantpt.c b/stdlib/grantpt.c
index d0411baa5cf08e3701f83dd427c2b481d6b4970f..c8653ec961c0f327cc009286a679aaf33d28ce1f 100644 (file)
--- a/stdlib/grantpt.c
+++ b/stdlib/grantpt.c
@@ -62,11 +62,15 @@ grantpt(int fd)
 char *
 ptsname(int fd)
 {
-       static char ptsnamebuf[ 128];   /* ioctl knows length */
+       static char *ptsnamebuf = NULL;
        int error;
        char *retval = NULL;
        struct stat sbuf;
 
+       if (ptsnamebuf == NULL) {
+               ptsnamebuf = malloc(128); // defined by TIOCPTYGNAME
+       }
+       
        error = ioctl(fd, TIOCPTYGNAME, ptsnamebuf);
        if (!error) {
                /*
@@ -75,8 +79,9 @@ ptsname(int fd)
                 * POSIX: Handle device rename test case, which is expected
                 * to fail if the pty has been renamed.
                 */
-               if (stat(ptsnamebuf, &sbuf) == 0)
+               if (stat(ptsnamebuf, &sbuf) == 0) {
                        retval = ptsnamebuf;
+               }
        }
 
        return (retval);