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Diffstat (limited to 'sysdeps/posix/ttyname_r.c')
| -rw-r--r-- | sysdeps/posix/ttyname_r.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/sysdeps/posix/ttyname_r.c b/sysdeps/posix/ttyname_r.c index a05dbd5be3..e6172f1c97 100644 --- a/sysdeps/posix/ttyname_r.c +++ b/sysdeps/posix/ttyname_r.c @@ -54,6 +54,9 @@ __ttyname_r (fd, buf, buflen) return -1; } + if (!__isatty (fd)) + return -1; + if (fstat (fd, &st) < 0) return -1; mydev = st.st_dev; |