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| author | Christian Brauner <christian.brauner@canonical.com> | 2017-01-27 15:59:59 +0100 |
|---|---|---|
| committer | Dmitry V. Levin <ldv@altlinux.org> | 2017-03-19 17:36:13 +0000 |
| commit | 15e9a4f378c8607c2ae1aa465436af4321db0e23 (patch) | |
| tree | 021ac3c62fe588a8745fcdf09d29392a837759e0 /ChangeLog | |
| parent | 345118d7f5bc42c8d4c3a8ef70b9b709fa57e93d (diff) | |
| download | glibc-15e9a4f378c8607c2ae1aa465436af4321db0e23.zip glibc-15e9a4f378c8607c2ae1aa465436af4321db0e23.tar.gz glibc-15e9a4f378c8607c2ae1aa465436af4321db0e23.tar.bz2 | |
linux ttyname and ttyname_r: do not return wrong results
If a link (say /proc/self/fd/0) pointing to a device, say /dev/pts/2, in a
parent mount namespace is passed to ttyname, and a /dev/pts/2 exists (in a
different devpts) in the current namespace, then it returns /dev/pts/2.
But /dev/pts/2 is NOT the current tty, it is a different file and device.
Detect this case and return ENODEV. Userspace can choose to take this as a hint
that the fd points to a tty device but to act on the fd rather than the link.
Signed-off-by: Serge Hallyn <serge@hallyn.com>
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 12 |
1 files changed, 12 insertions, 0 deletions
@@ -1,3 +1,15 @@ +2017-03-19 Christian Brauner <christian.brauner@ubuntu.com> + + * sysdeps/unix/sysv/linux/ttyname.h: New file. + * sysdeps/unix/sysv/linux/ttyname.c: Include "ttyname.h". + (ttyname) [!_STATBUF_ST_RDEV]: Make code unconditional. + Call is_pty when the link does not exist or does not match, fail + with ENODEV when it returns true. + * sysdeps/unix/sysv/linux/ttyname_r.c: Include "ttyname.h". + (__ttyname_r) [!_STATBUF_ST_RDEV]: Make code unconditional. + Call is_pty when the link does not exist or does not match, fail + with ENODEV when it returns true. + 2017-03-18 Joseph Myers <joseph@codesourcery.com> [BZ #16437] |