fix negated error codes from ptsname_r

the incorrect error codes also made their way into errno when
__ptsname_r was called by plain ptsname, which reports errors via
errno rather than a return value.

diff --git a/src/misc/pty.c b/src/misc/pty.c
index 9e201ef3218b41bf8863ebabca04a845ddad70e0..b395d2c09e14f19bad0d7130de8c0a9c1cc14fd4 100644 (file)
--- a/src/misc/pty.c
+++ b/src/misc/pty.c
@@ -26,7 +26,7 @@ int __ptsname_r(int fd, char *buf, size_t len)
 {
        int pty, err;
        if (!buf) len = 0;
-       if ((err = __syscall(SYS_ioctl, fd, TIOCGPTN, &pty))) return err;
+       if ((err = __syscall(SYS_ioctl, fd, TIOCGPTN, &pty))) return -err;
        if (snprintf(buf, len, "/dev/pts/%d", pty) >= len) return ERANGE;
        return 0;
 }