path: root/support/dependencies/check-host-tar.sh
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authorGravatar Peter Korsgaard <peter@korsgaard.com>2018-04-02 11:48:08 +0200
committerGravatar Peter Korsgaard <peter@korsgaard.com>2018-04-02 14:46:52 +0200
commitcdac332d20d2d1326dee0111e188fa214549122b (patch)
tree756f9c89f45cafbb7061dc79116a8d80a507430c /support/dependencies/check-host-tar.sh
parentc8ef0c03b0b7f8238068f76a8c4f5c1c249c02e8 (diff)
check-host-tar.sh: bump minimum tar version to 1.27 for reproducible tar files with long paths
Fixes: http://autobuild.buildroot.net/results/b18/b187e64a61918f17f69588e2355a03286bc5808e tar 1.27 subtly changed the tar format when a GNU long link entry is added (which is done for path elements > 100 characters). The code used to set the permission mode of the link entry to 0: header = start_private_header ("././@LongLink", size, time (NULL)); FILL (header->header.mtime, '0'); FILL (header->header.mode, '0'); FILL (header->header.uid, '0'); FILL (header->header.gid, '0'); FILL (header->header.devmajor, 0); FILL (header->header.devminor, 0); This got dropped in 1.27 by commit df7b55a8f6354e3 (Fix some problems with negative and out-of-range integers), so the settings from start_private_header() are used directly - Which are: TIME_TO_CHARS (t < 0 ? 0 : min (t, MAX_OCTAL_VAL (header->header.mtime)), header->header.mtime); MODE_TO_CHARS (S_IFREG|S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH, header->header.mode); UID_TO_CHARS (0, header->header.uid); GID_TO_CHARS (0, header->header.gid); The end result is that tar >= 1.27 sets mode to 644. The consequence of this is that we create different tar files when long path names are encountered (which often happens when a package downloads a specific sha1 from a git repo) depending on the host tar version used, causing hash mismatches. As a workaround, bump our minimum tar version to 1.27. It would be nicer to only do this if we have packages from bzr/git/hg enabled, but that is an exercise for later. Signed-off-by: Peter Korsgaard <peter@korsgaard.com> Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Diffstat (limited to 'support/dependencies/check-host-tar.sh')
1 files changed, 4 insertions, 3 deletions
diff --git a/support/dependencies/check-host-tar.sh b/support/dependencies/check-host-tar.sh
index 2143877524..0857307396 100755
--- a/support/dependencies/check-host-tar.sh
+++ b/support/dependencies/check-host-tar.sh
@@ -26,10 +26,11 @@ if [ ! -z "${version_bsd}" ] ; then
-# Minimal version = 1.17 (previous versions do not correctly unpack archives
-# containing hard-links if the --strip-components option is used).
+# Minimal version = 1.27 (previous versions do not correctly unpack archives
+# containing hard-links if the --strip-components option is used or create
+# different gnu long link headers for path elements > 100 characters).
# Maximal version = 1.29 (1.30 changed --numeric-owner output for
# filenames > 100 characters). This is really a fix for a bug in