mirror of
git://git.sv.gnu.org/coreutils.git
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39 lines
885 B
Bash
Executable File
39 lines
885 B
Bash
Executable File
#!/bin/sh
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# Ensure that tail -f works on an append-only file
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# Requires root access to do chattr +a, as well as an ext[23] or xfs file system
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if test "$VERBOSE" = yes; then
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set -x
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tail --version
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fi
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PRIV_CHECK_ARG=require-root . $srcdir/../priv-check
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pwd=`pwd`
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t0=`echo "$0"|sed 's,.*/,,'`.tmp; tmp=$t0/$$
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trap 'status=$?; cd $pwd; chmod -R u+rwx $t0; rm -rf $t0 && exit $status' 0
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trap '(exit $?); exit $?' 1 2 13 15
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framework_failure=0
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mkdir -p $tmp || framework_failure=1
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cd $tmp || framework_failure=1
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touch f
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chattr +a f 2>/dev/null || framework_failure=1
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( echo x > f ) 2>/dev/null && framework_failure=1
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echo x >> f || framework_failure=1
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if test $framework_failure = 1; then
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echo "$0: failure in testing framework" 1>&2
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(exit 1); exit 1
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fi
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fail=0
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sleep 1 &
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pid=$!
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tail --pid=$pid -f f > /dev/null 2>&1 || fail=1
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chattr -a f 2>/dev/null
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(exit $fail); exit $fail
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