URL:
<http://savannah.gnu.org/bugs/?43921>
Summary: make does not check error result of ttyname()
Project: make
Submitted by: frank
Submitted on: Sa 03 Jan 2015 08:39:03 GMT
Severity: 3 - Normal
Item Group: Bug
Status: None
Privacy: Public
Assigned to: None
Open/Closed: Open
Discussion Lock: Any
Component Version: 4.1
Operating System: POSIX-Based
Fixed Release: None
Triage Status: None
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Details:
make uses isatty() on stdout/stderr and if successful, calls
define_variable_cname() with the result of ttyname() without checking whether
it's NULL.
Of course, normally this won't happen after isatty() returns 1, but it may in
special circumstances, e.g. under GNU/Linux if it's a pty, but /dev/pts is not
readable. That's one way to reproduce it:
% sudo chmod 0 /dev/pts
% make
Segmentation fault
% sudo chmod 755 /dev/pts
(What I'd actually done when I saw it was to run make in a chroot where I had
bind-mounted /dev, but forgotten about /dev/pts -- should have used --rbind.)
So you might say it's a case of don't-do-that, and it's not really important
to me, just wanted to let you know ...
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<http://savannah.gnu.org/bugs/?43921>
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