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The Linux fs.protected_regular sysctl setting could cause rsync to fail to write a file in-place with the O_CREAT flag set, so the code now tries an open without O_CREAT when it might help to avoid an EACCES error. A testsuite script is included (and slightly improved by Wayne to ensure that it outputs a SKIP when fs.protected_regular is turned off).
32 lines
1.1 KiB
Bash
32 lines
1.1 KiB
Bash
#!/bin/sh
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# Copyright (C) 2021 by Achim Leitner <aleitner@lis-engineering.de>
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# This program is distributable under the terms of the GNU GPL (see COPYING)
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#
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# Modern linux systems have the protected_regular feature set to 1 or 2
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# See https://www.kernel.org/doc/Documentation/sysctl/fs.txt
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# Make sure we can still write these files in --inplace mode
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. "$suitedir/rsync.fns"
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test -f /proc/sys/fs/protected_regular || test_skipped "Can't find protected_regular setting (only available on Linux)"
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pr_lvl=`cat /proc/sys/fs/protected_regular 2>/dev/null` || test_skipped "Can't check if fs.protected_regular is enabled (probably need root)"
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test "$pr_lvl" != 0 || test_skipped "fs.protected_regular is not enabled"
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workdir="$tmpdir/files"
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mkdir "$workdir"
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chmod 1777 "$workdir"
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echo "Source" > "$workdir/src"
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echo "" > "$workdir/dst"
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chown 5001 "$workdir/dst" || test_skipped "Can't chown (probably need root)"
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# Output is only shown in case of an error
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echo "Contents of $workdir:"
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ls -al "$workdir"
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$RSYNC --inplace "$workdir/src" "$workdir/dst" || test_fail
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# The script would have aborted on error, so getting here means we've won.
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exit 0
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