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dda702fd16
Not all systems / distros have a `/bin/bash`, and these scripts are
more difficult to run at development time.
For example, my system is NixOS which doesn't have a /bin/bash. This
is not a problem for NixOS building ZFS as a package: the build
environment automatically replaces these shebangs with corrected
paths.
The problem is much more annoying at development time: either the
scripts don't run, or I correct them for my local machine and deal with
a perpetually dirty work tree.
Before committing this patch I confirmed there are existing scripts
which use `/usr/bin/env` to locate bash, so I am thinking this is a
safe transformation.
There are a handful of other shebangs in this repository which don't
work on my system. This patch is useful on its own specifically for
`commitcheck.sh`, otherwise I can't validate my commits before
submission.
Here are the remaining shebangs which NixOS systems won't have:
1274 #!/bin/ksh -p
91 #!/bin/ksh
89 #! /bin/ksh -p
2 #!/bin/sed -f
1 #!/usr/bin/perl -w
1 #!/usr/bin/ksh
1 #!/bin/nawk -f
plus this which will create an invalid shebang in
`tests/zfs-tests/tests/functional/mv_files/mv_files_common.kshlib`:
echo "#!/bin/ksh" > $TEST_BASE_DIR/exitsZero.ksh
I chose to leave those alone for now, and gauge the interest in this
much smaller patch first.
The fixes for these are easy enough by simply using `/usr/bin/env ksh`:
91 #!/bin/ksh
1 #!/usr/bin/ksh
The fix for the other set is much trickier. Quoting the GNU coreutils
manual:
Most operating systems (e.g. GNU/Linux, BSDs) treat all text after
the first space as a single argument. When using env in a script it
is thus not possible to specify multiple arguments.
and not all `env`'s support arguments.
Mine (GNU Coreutils 8.31) does, though this feature is new since
April 2018, GNU Coreutils 8.30:
https://git.savannah.gnu.org/cgit/coreutils.git/commit/?id=668306ed86c8c79b0af0db8b9c882654ebb66db2
and worse, requires the -S argument:
-S, --split-string=S process and split S into separate arguments;
used to pass multiple arguments on shebang
lines
Example:
$ seq 1 2 | $(nix-build '<nixpkgs>' -A coreutils)/bin/env "sort -nr"
/nix/[...]-coreutils-8.31/bin/env: ‘sort -nr’: No such file or directory
/nix/[...]-coreutils-8.31/bin/env: use -[v]S to pass options in shebang lines
$ seq 1 2 | $(nix-build '<nixpkgs>' -A coreutils)/bin/env "-S sort -nr"
2
1
GNU Coreutils says FreeBSD's `env` does, though I wonder if FreeBSD's
would be unhappy with the `-S`:
https://www.gnu.org/software/coreutils/manual/html_node/env-invocation.html#env-invocation
BusyBox v1.30.1 does not, and does not have a `-S`-like option:
$ seq 1 2 | $(nix-build '<nixpkgs>' -A busybox)/bin/env "sort -nr"
env: can't execute 'sort -nr': No such file or directory
Toybox 0.8.1 also does not, and also does not have a `-S` option:
$ seq 1 2 | $(nix-build '<nixpkgs>' -A toybox)/bin/env "sort -nr"
env: exec sort -nr: No such file or directory
---
At any rate, if this patch merges and the remaining ~1,500 are updated,
the much larger patch should probably include a checkstyle-like test
asserting all new shebangs use `/usr/bin/env`. I also don't mind
dealing with NixOS weirdness if the project would prefer that.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Signed-off-by: Graham Christensen <graham@grahamc.com>
Closes #9893
137 lines
3.8 KiB
Bash
Executable File
137 lines
3.8 KiB
Bash
Executable File
#!/usr/bin/env bash
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get_devtype() {
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local typ
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typ=$(udevadm info --query=property --name="$1" | grep "^ID_FS_TYPE=" | sed 's|^ID_FS_TYPE=||')
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if [ "$typ" = "" ] ; then
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typ=$(blkid -c /dev/null "$1" -o value -s TYPE)
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fi
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echo "$typ"
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}
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get_pool_devices() {
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# also present in 99zfssystemd
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local poolconfigtemp
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local poolconfigoutput
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local pooldev
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local prefix
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local resolved
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poolconfigtemp=`mktemp`
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@sbindir@/zpool list -v -H -P "$1" > "$poolconfigtemp" 2>&1
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if [ "$?" != "0" ] ; then
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poolconfigoutput=$(cat "$poolconfigtemp")
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dinfo "zfsexpandknowledge: pool $1 cannot be listed: $poolconfigoutput"
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else
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cat "$poolconfigtemp" | awk -F '\t' '/\t\/dev/ { print $2 }' | \
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while read pooldev ; do
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if [ -n "$pooldev" -a -e "$pooldev" ] ; then
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if [ -h "$pooldev" ] ; then
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resolved=`readlink -f "$pooldev"`
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else
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resolved="$pooldev"
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fi
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dinfo "zfsexpandknowledge: pool $1 has device $pooldev (which resolves to $resolved)"
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echo "$resolved"
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fi
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done
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fi
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rm -f "$poolconfigtemp"
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}
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find_zfs_block_devices() {
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local dev
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local blockdev
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local mp
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local fstype
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local pool
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local key
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local n
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local poolconfigoutput
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numfields=`head -1 /proc/self/mountinfo | awk '{print NF}'`
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if [ "$numfields" == "10" ] ; then
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fields="n n n n mp n n fstype dev n"
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else
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fields="n n n n mp n n n fstype dev n"
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fi
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while read $fields ; do
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if [ "$fstype" != "zfs" ]; then continue ; fi
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if [ "$mp" == "$1" ]; then
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pool=$(echo "$dev" | cut -d / -f 1)
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get_pool_devices "$pool"
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fi
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done < /proc/self/mountinfo
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}
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array_contains () {
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local e
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for e in "${@:2}"; do [[ "$e" == "$1" ]] && return 0; done
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return 1
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}
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check() {
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local mp
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local dev
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local blockdevs
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local fstype
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local majmin
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local _slavedev
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local _slavedevname
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local _slavedevtype
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local _slavemajmin
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local _dev
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if [[ $hostonly ]]; then
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for mp in \
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"/" \
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"/etc" \
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"/bin" \
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"/sbin" \
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"/lib" \
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"/lib64" \
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"/usr" \
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"/usr/bin" \
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"/usr/sbin" \
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"/usr/lib" \
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"/usr/lib64" \
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"/boot";
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do
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mp=$(readlink -f "$mp")
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mountpoint "$mp" >/dev/null 2>&1 || continue
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blockdevs=$(find_zfs_block_devices "$mp")
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if [ -z "$blockdevs" ] ; then continue ; fi
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dinfo "zfsexpandknowledge: block devices backing ZFS dataset $mp: $blockdevs"
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for dev in $blockdevs
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do
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array_contains "$dev" "${host_devs[@]}" || host_devs+=("$dev")
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fstype=$(get_devtype "$dev")
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host_fs_types["$dev"]="$fstype"
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majmin=$(get_maj_min "$dev")
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if [[ -d /sys/dev/block/$majmin/slaves ]] ; then
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for _slavedev in /sys/dev/block/$majmin/slaves/*; do
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[[ -f $_slavedev/dev ]] || continue
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_slavedev=/dev/$(basename "$_slavedev")
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_slavedevname=$(udevadm info --query=property --name="$_slavedev" | grep "^DEVNAME=" | sed 's|^DEVNAME=||')
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_slavedevtype=$(get_devtype "$_slavedevname")
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_slavemajmin=$(get_maj_min "$_slavedevname")
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dinfo "zfsexpandknowledge: slave block device backing ZFS dataset $mp: $_slavedevname"
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array_contains "$_slavedevname" "${host_devs[@]}" || host_devs+=("$_slavedevname")
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host_fs_types["$_slavedevname"]="$_slavedevtype"
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done
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fi
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done
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done
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for a in "${host_devs[@]}"
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do
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dinfo "zfsexpandknowledge: host device $a"
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done
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for a in "${!host_fs_types[@]}"
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do
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dinfo "zfsexpandknowledge: device $a of type ${host_fs_types[$a]}"
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done
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fi
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return 1
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}
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