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authorDan McGee <dan@archlinux.org>2011-08-19 13:10:17 -0500
committerDan McGee <dan@archlinux.org>2011-08-19 13:10:17 -0500
commite07547ee4ed4fd812a7f50b998589fa27c12de4c (patch)
tree4ab4b3869e7e3cf1ab6bf96e954beea4ab9de276 /contrib
parent6d544984f2418ea34caab4c433580487b760362a (diff)
downloadpacman-e07547ee4ed4fd812a7f50b998589fa27c12de4c.tar.xz
Rework finding a writable cache directory
This is a refactor and refresh of the code used to find where we should download packages. * Incorporate suggestions from FS#25435 to use TMPDIR from the environment if set, otherwise fall back to /tmp as before. * Make the writability tests a bit more in depth. We now do a three part check consisting of: - S_ISDIR(): is this even a directory - access(W_OK): is this directory writable by the current user. Unfortunately for root, this almost always returns that it is, but in the case of a RO mount or NFS share inaccessible to root, this check will exclude the directory. - mode & (any write bit): is there a writable bit set on this directory. This makes it possible to enforce a read-only cache directory by setting permissions to 0555, for example. Signed-off-by: Dan McGee <dan@archlinux.org>
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