X-Git-Url: http://git.iain.cx/?a=blobdiff_plain;f=opt%2Fbin%2Fbecome;h=07801c396abfec719a70d720d561e53e7c4e6d64;hb=2f4249cac9aa299fd3e2c36b7b6e17c19ff92854;hp=d95864686a727451d8f088ab52cd0098951e5689;hpb=43bd09dddc21deb45cee89c4bff4e094c9acab09;p=profile.git

diff --git a/opt/bin/become b/opt/bin/become
index d958646..07801c3 100755
--- a/opt/bin/become
+++ b/opt/bin/become
@@ -3,21 +3,42 @@
 chdir=0
 kerberos=0
 x11=0
-while getopts ":kx" opt; do
+copy=0
+dir=
+while getopts ":D:cd:kx" opt; do
   case $opt in
+    D)
+      copy=1
+      dir=$OPTARG
+    ;;
     c) chdir=1;;
+    d) dir=$OPTARG;;
     k) kerberos=1;;
     x) x11=1;;
   esac
 done
 shift $((OPTIND-1))
 
+srcdir=${0%/*}
+[ "$srcdir" = "$0" -o "$srcdir" = "." ] && srcdir=$PWD
+if [ -n "$dir" ]; then
+  if [ $copy = 1 ]; then
+    if ! cp "$srcdir/became" "$dir/became"; then
+      echo >&2 "Failed to copy $srcdir/became to $dir!"
+      exit 100
+    fi
+  fi
+else
+  dir=$srcdir
+fi
+
 user="$1"; shift
 if [ -z "$user" ]; then
-  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."
+  echo >&2 "Usage: become [-c] [-d <dir>] [-k] [-x] <user>"
+  echo >&2 "Options: -c         Stay in current directory even if target user is not root."
+  echo >&2 "         -d <dir>   Look for \"became\" script in given directory."
+  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
 
@@ -59,6 +80,29 @@ for candidate in "$HOME" "$PROFILE_HOME"; do
   [ -f "$userprofile" ] || userprofile=
 done
 
+# Preserve environment variables.
+ignore_environment_user=0
+for candidate in "$HOME" "$PROFILE_HOME"; do
+  [ -n "$candidate" ] || continue
+  BECOME="$candidate/.become/environment"
+  [ -d "$BECOME" ] || continue
+
+  # Script to run when becoming any user.
+  [ -z "$allusersenvironment" ] && allusersenvironment="$BECOME/all"
+  [ -f "$allusersenvironment" ] || allusersenvironment=
+
+  # Set $HOME/all sticky to ignore $PROFILE_HOME/$user.
+  if [ "$candidate" = "$HOME" ]; then
+    [ -k "$BECOME/all" ] && ignore_environment_user=1
+  else
+    [ $ignore_environment_user = 1 ] && continue
+  fi
+
+  # Environment variables to preserve when becomeing this user.
+  [ -z "$userenvironment" ] && userenvironment="$BECOME/$user"
+  [ -f "$userenvironment" ] || userenvironment=
+done
+
 file="${TMPDIR:-/tmp}/$USER.become.$user.$RANDOM.$$"
 umask=$(builtin umask -p)
 builtin umask 077
@@ -93,12 +137,18 @@ else
 fi
 
 echo >&3 ". ${PROFILE_HOME:-$HOME}/.bash_profile"
-[ -f "$allusersprofile" ] && cat >&3 2>/dev/null "$allusersprofile"
-[ -f "$userprofile" ] && cat >&3 2>/dev/null "$userprofile"
+for profile in "$allusersprofile" "$userprofile"; do
+  [ -f "$profile" ] && cat >&3 2>/dev/null "$profile"
+done
+for environment in "$allusersenvironment" "$userenvironment"; do
+  [ -f "$environment" ] || continue
+  while read -d $'\n' variable; do
+    variable=${variable%%=*}
+    eval "[ -z \${$variable:+set} ] || echo >&3 \"$variable='\$$variable'\""
+  done < "$environment"
+done
 [ $chdir = 1 ] && echo >&3 2>/dev/null "cd - &>/dev/null"
 
 exec 3>&-
-dir=$(dirname "$0")
-[ "$dir" = "." ] && dir="$PWD"
 exec sudo -H -u "$user" "$dir/became"
 exit 111