diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/ttyname.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/ttyname.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/sysdeps/unix/sysv/linux/ttyname.c b/sysdeps/unix/sysv/linux/ttyname.c index aed0fd8e0a..1b79787515 100644 --- a/sysdeps/unix/sysv/linux/ttyname.c +++ b/sysdeps/unix/sysv/linux/ttyname.c @@ -22,6 +22,7 @@ #include <dirent.h> #include <sys/types.h> #include <sys/stat.h> +#include <termios.h> #include <unistd.h> #include <string.h> #include <stdlib.h> @@ -118,12 +119,12 @@ ttyname (int fd) int dostat = 0; char *name; int save = errno; + struct termios term; - if (__builtin_expect (!__isatty (fd), 0)) - { - __set_errno (ENOTTY); - return NULL; - } + /* isatty check, tcgetattr is used because it sets the correct + errno (EBADF resp. ENOTTY) on error. */ + if (__builtin_expect (__tcgetattr (fd, &term) < 0, 0)) + return NULL; /* We try using the /proc filesystem. */ *_fitoa_word (fd, __stpcpy (procname, "/proc/self/fd/"), 10, 0) = '\0'; |