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authorNick Kralevich <nnk@google.com>2018-10-22 10:18:14 -0500
committerRob Landley <rob@landley.net>2018-10-22 10:18:14 -0500
commitad1f2685eb2768dbc2b52a9962d6279aa90a343d (patch)
tree4aa04d07fb311fedd81dae4725ea1adbe0c6c66e /kconfig/zconf.tab.c_shipped
parente13985bf81681373fe4337d03382e3c0201912ba (diff)
downloadtoybox-ad1f2685eb2768dbc2b52a9962d6279aa90a343d.tar.gz
Don't call TIOCGWINSZ on non-ttys
Prior to calling TIOCGWINSZ on stdin/stdout/stderr, check to see if the file descriptor is a tty. Calling TIOCGWINSZ on a non-tty doesn't make any sense. Calling TIOCGWINSZ on a non-tty is mildly problematic for systems like Android where strict ioctl filtering is in place, and generates SELinux audit noise. Strict ioctl filtering for non-filesystem fifo_files (eg pipe() or pipe2() generated pipes) was enabled in Android in commit https://android-review.googlesource.com/c/platform/system/sepolicy/+/792599
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