** Description changed:
+ [Impact]
+
+ * For consistency reasons sbin should be ordered before bin in PATH.
+
+ [Test Case]
+
+ * $ env -u PATH /bin/bash -c 'echo $PATH'
+
+ And check that matching pairs in PATH, have /sbin variant leading /bin
+ variant.
+
+ [Regression Potential]
+
+ * Ubuntu does not ship duplicate binries, with different behaviour
+ between /sbin and /bin, thus all binaries will continue to be found in
+ all locations. Also PATH is normally already set in the environment, and
+ this change only affects the fallback path when bash is executed without
+ any environment, i.e. booting with 'init=/bin/bash'
+
+ [Other Info]
+
+ * Original bug report detailing inconsistent paths between various shells.
+
+ ---
+
+
$ env -u PATH /bin/sh -c 'echo $PATH'
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
$ env -u PATH /bin/dash -c 'echo $PATH'
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
$ systemd-run --unit test-env env # ... and check journal for PATH
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
$ env -u PATH /bin/bash -c 'echo $PATH'
/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin:.
$ env -u PATH /bin/busybox sh -c 'echo $PATH'
/sbin:/usr/sbin:/bin:/usr/bin
$ grep 'export PATH=' -r initramfs-tools-0.131ubuntu10/
initramfs-tools-0.131ubuntu10/mkinitramfs:export PATH='/usr/bin:/sbin:/bin'
initramfs-tools-0.131ubuntu10/init:export PATH=/sbin:/usr/sbin:/bin:/usr/bin
dracut.sh has DRACUT_PATH=${DRACUT_PATH:-/sbin /bin /usr/sbin /usr/bin}
exported as PATH
dracut-047+31/modules.d/99shutdown/shutdown.sh:export
PATH=/usr/sbin:/usr/bin:/sbin:/bin
$ cat /etc/environment
PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games"
apt & dpkg => should probably initiate /usr/local-less PATH
Imho the rest should probably be harmonised to:
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin
===
From a duplicate
https://bugs.launchpad.net/ubuntu/+source/bash/+bug/1614080 :
$ for i in 12.04 12.10 13.04 13.10 14.04 14.10 15.04 15.10 16.04; do echo $i;
docker run -it --rm ubuntu:$i bash -c "unset PATH; /bin/bash -c 'echo \$PATH'";
done
12.04
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
12.10
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
13.04
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
13.10
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
14.04
/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin:.
14.10
/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin:.
15.04
/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin:.
15.10
/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin:.
16.04
/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin:.
I believe later releases of bash, do too include CWD in the built-in
PATH.
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https://bugs.launchpad.net/bugs/1792004
Title:
built-in PATH seems to have sbin and bin out of order; and
inconsistent
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