| Commit message (Collapse) | Author | Age |
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Previously we always expanded here-documents in a subshell. This is
contrary to the POSIX specification and how other shells behave. What's
more this slows down many expansions due to the extra fork (however, it
must be said that it is possible for it speed up certain expansions by
running it simultaneously with the command on two CPUs).
This patch move the expansion into the current shell environment.
Test case:
unset a
cat <<- EOF > /dev/null
${a=NOT}
EOF
echo ${a}BAD
Old result:
BAD
New result:
NOTBAD
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Add likely flag on REDIR_PUSH.
Remove sv check on REDIR_SAVEFD2 (it implies REDIR_PUSH).
Optimise NTOFD/NFROMFD same fd check.
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As it stands if a redirection occurs on a file descriptor that was
previously closed, it won't be closed after that redirection goes
out of effect. This is because we don't keep track of closed file
descriptors properly as we do for open ones.
This patch fixes this by introducing two new states, CLOSED and
REALLY_CLOSED. The first represents an initially closed descriptor
which is now open while the second one represents an initally closed
descriptor which is now closed.
This patch is based on work by Rainer Weikusat.
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Now that we're marking file descriptors as CLOEXEC in savefd, we no longer
need to close them on exec or in setinputfd.
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There are two kinds of users to copyfd, those that want to copy an fd to
an exact value and those that want to move an fd to a value >= 10. The
former can simply use dup2 directly while the latter share a lot of common
code that now constitutes savefd.
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No caller of copyfd need to ignore EMFILE so we can remove the special
case and just let it call sh_error on any error.
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This change updates the BSD licence to the three-clause version since
NetBSD has already done so. This makes dash GPL-compatible.
It also adds Christos Zoulas (NetBSD ash maintainer) to the COPYING file.
I've added "copyright by Herbert Xu" to most files.
Finally all CVS IDs and inclusion of sys/cdefs.h have been removed.
The latter is needed for support of klibc.
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