Don't change directory by default unless becoming root.

If the target user is not root require the -c flag to change back
to the directory from which become was launched.

diff --git a/opt/bin/become b/opt/bin/become
index 26298cb..e874ae5 100755 (executable)
--- a/opt/bin/become
+++ b/opt/bin/become
@@ -1,9 +1,11 @@
 #!/bin/bash
 
+chdir=0
 kerberos=0
 x11=0
 while getopts ":kx" opt; do
   case $opt in
+    c) chdir=1;;
     k) kerberos=1;;
     x) x11=1;;
   esac
@@ -12,8 +14,9 @@ shift $((OPTIND-1))
 
 user="$1"; shift
 if [ -z "$user" ]; then
-  echo >&2 "Usage: become [-k] [-x] <user>"
-  echo >&2 "Options: -k   Delegate Kerberos credentials even if target user is not root."
+  echo >&2 "Usage: become [-c] [-k] [-x] <user>"
+  echo >&2 "Options: -c   Stay in current directory even if target user is not root."
+  echo >&2 "         -k   Delegate Kerberos credentials even if target user is not root."
   echo >&2 "         -x   Delegate X11 cookie even if target user is not root."
   exit 1
 fi
@@ -25,6 +28,7 @@ if [ -z "$uid" ]; then
 fi
 
 if [ $uid = 0 ]; then
+  chdir=1
   kerberos=1
   x11=1
 fi
@@ -69,7 +73,7 @@ fi
 echo >&3 ". $HOME/.bash_profile"
 [ -f "$BECOME/all" ] && cat >&3 2>/dev/null "$BECOME/all"
 [ -f "$BECOME/$user" ] && cat >&3 2>/dev/null "$BECOME/$user"
-echo >&3 2>/dev/null "cd - &>/dev/null"
+[ $chdir = 1 ] && echo >&3 2>/dev/null "cd - &>/dev/null"
 
 exec 3>&-
 dir=$(dirname "$0")