iotests: Use absolute paths for executables
A user may specify a relative path for accessing qemu, qemu-img, etc. through environment variables ($QEMU_PROG and friends) or a symlink. If a test decides to change its working directory, relative paths will cease to work, however. Work around this by making all of the paths to programs that should undergo testing absolute. Besides "realpath", we also have to use "type -p" to support programs in $PATH. As a side effect, this fixes specifying these programs as symlinks for out-of-tree builds: Before, you would have to create two symlinks, one in the build and one in the source tree (the first one for common.config to find, the second one for the iotest to use). Now it is sufficient to create one in the build tree because common.config will resolve it. Reported-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com> Message-id: 20170702150510.23276-2-mreitz@redhat.com Reviewed-by: Eric Blake <eblake@redhat.com> Tested-by: Eric Blake <eblake@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com>
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@ -103,6 +103,17 @@ if [ -z "$QEMU_VXHS_PROG" ]; then
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export QEMU_VXHS_PROG="`set_prog_path qnio_server`"
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fi
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export QEMU_PROG=$(realpath -- "$(type -p "$QEMU_PROG")")
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export QEMU_IMG_PROG=$(realpath -- "$(type -p "$QEMU_IMG_PROG")")
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export QEMU_IO_PROG=$(realpath -- "$(type -p "$QEMU_IO_PROG")")
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export QEMU_NBD_PROG=$(realpath -- "$(type -p "$QEMU_NBD_PROG")")
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# This program is not built as part of qemu but (possibly) provided by the
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# system, so it may not be present at all
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if [ -n "$QEMU_VXHS_PROG" ]; then
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export QEMU_VXHS_PROG=$(realpath -- "$(type -p "$QEMU_VXHS_PROG")")
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fi
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_qemu_wrapper()
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{
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(
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