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Use a pty for prefixed output instead of pipes for stdout/stderr. This

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is so that programs can get information about the controlling terminal.
This change was triggered by bug #188506 where it's possible that
stdin, stdout and stderr didn't point to a terminal but ended up on one
via our pipes. Using a pty means that stdout and stderr always point to
a terminal, but we lose the ability to tell them apart.
If there is not a pty available then we use un-prefixed output as normal.
This change has also introduced the need for a signal pipe so that
SIGCHLD can exit the loop cleanly.
This commit is contained in:
Roy Marples
2007-09-21 08:49:43 +00:00
parent ca58877ed0
commit 45bd125dcc
5 changed files with 123 additions and 137 deletions
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12
ChangeLog
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@@ -1,6 +1,18 @@
# ChangeLog for Gentoo System Intialization ("rc") scripts
# Copyright 1999-2007 Gentoo Foundation; Distributed under the GPLv2
21 Sep 2007; Roy Marples <uberlord@gentoo.org>:
Use a pty for prefixed output instead of pipes for stdout/stderr. This
is so that programs can get information about the controlling terminal.
This change was triggered by bug #188506 where it's possible that
stdin, stdout and stderr didn't point to a terminal but ended up on one
via our pipes. Using a pty means that stdout and stderr always point to
a terminal, but we lose the ability to tell them apart.
If there is not a pty available then we use un-prefixed output as normal.
This change has also introduced the need for a signal pipe so that
SIGCHLD can exit the loop cleanly.
20 Sep 2007; Roy Marples <uberlord@gentoo.org>:
libeinfo now works out the number of columns from stdout rather than