From 2a5d7dff6f78e1b68ba163cc9843a478f108cd7b Mon Sep 17 00:00:00 2001
From: CyberLeo <cyberleo@cyberleo.net>
Date: Fri, 13 Jul 2012 07:47:30 -0500
Subject: [PATCH] j: autodetect chroot binary location; different in different
 distros

---
 j | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/j b/j
index ea86670..5b50932 100755
--- a/j
+++ b/j
@@ -50,6 +50,14 @@ jseed="${j}/seeds"
 jname="${J_NAME:-$(basename "${1}")}" #"
 juser="${J_USER}"
 
+# Find chroot binary, since it can be in many different places on different distros
+for chroot in /usr/sbin/chroot /usr/bin/chroot /sbin/chroot /bin/chroot
+do
+  [ -f "${chroot}" ] && break
+  unset chroot
+done
+[ "${chroot}" ] || wtf "Cannot find chroot in /usr/sbin:/usr/bin:/sbin:/bin"
+
 # cgroup to use; if not found, cgroup support will not be used
 jcgroup="freezer"
 # cgroup parent to use (${cgroup}/${parent}/${jname})
@@ -324,7 +332,7 @@ j_root_eval() {
   j_up "${jname}" || wtf "chroot not running"
   eval "$(j_params "${jname}")"
   j_cg_trap $$
-  env -i ${jenv} /usr/bin/chroot "${jroot}" /bin/sh -c "${*}"
+  env -i ${jenv} "${chroot}" "${jroot}" /bin/sh -c "${*}"
 }
 
 # Execute command in chroot
@@ -333,7 +341,7 @@ j_eval() {
   j_up "${jname}" || wtf "chroot not running"
   eval "$(j_params "${jname}")"
   j_cg_trap $$
-  env -i ${jenv} /usr/bin/chroot "${jroot}" /bin/su "${juser:-${USER}}" -c "${*}"
+  env -i ${jenv} "${chroot}" "${jroot}" /bin/su "${juser:-${USER}}" -c "${*}"
 }
 
 # Invoke a shell within the chroot
-- 
2.45.0