mkinitramfs:Convert cp calls to install

Install supports -D and -m switches to create leading paths if they
don't exist yet, and set destination permissions on copy. These make the
script more reliable and shorter.

Updated cache directory setup function to create fewer directories since
the install command handles much of that now.

Cleaned up some parent directory determination logic as a result of this
new functionalty as well.

Also added reboot command to binaries to be installed.

1 files changed, 9 insertions, 35 deletions

diff --git a/mkinitramfs b/mkinitramfs
index 4c738bb..d7d3d61 100755
--- a/mkinitramfs
+++ b/mkinitramfs
@@ -126,27 +126,7 @@ function cache_dir_setup {
   # Clean the cache so we start fresh
   rm -rf ${cache} && mkdir ${cache}
 
-  local dirs=(
-    bin
-    dev
-    dev/disk
-    dev/disk/by-uuid
-    etc
-    lib
-    lib32
-    lib64
-    mnt/root
-    proc
-    root
-    run
-    sbin
-    sys
-    usr/lib
-    usr/lib64
-    usr/lib32
-    usr/bin
-    usr/sbin
-  )
+  local dirs=(bin dev etc lib lib32 lib64 mnt/root proc root run sbin sys usr)
 
   # Create the temporary directory structure
   for i in ${dirs[*]}; do
@@ -209,7 +189,7 @@ function main {
   # List of binaries to exist in the new initramfs
   resolve_bins \
     bash cat echo ls cryptsetup chmod chown mount sleep umount clear cut \
-    grep less tr which blkid shutdown switch_root
+    grep less tr which blkid reboot shutdown switch_root
 
 
   # Set up the archive source dir.
@@ -220,28 +200,22 @@ function main {
 
   # Copy binary and dependencies to cache dir
   for bin in ${fqbins[@]}; do
-    bindirname=$(dirname ${bin})
     # Copy the binary of interest
-    cp -u ${bin} "${cache}/${bindirname}/"
+    install -D "${bin}" "${cache}/${bin}"
 
-    deps=$(get_deps ${bin})
+    local deps=$(get_deps ${bin})
     # Copy each of the binary's deps
     for dep in ${deps[@]}; do
-      local depdirname=$(dirname ${dep})
-      cp -u ${dep} "${cache}/${depdirname}/"
-      if [[ $? -gt 0 ]]; then
-        echo "Error: Problem copying ${dep} into ${cache}."
-	      exit 1
-      fi
+      install -D ${dep} "${cache}/${dep}"
     done
   done
 
-  # Copy in init script and add execute
-  cp ${res_path}/init ${cache}/init && chmod +x ${cache}/init
   # Copy in message file
-  cp ${res_path}/msg ${cache}/etc/msg
+  [[ -f ${res_path}/msg ]] && install -D ${res_path}/msg ${cache}/etc/msg
+  # Copy in init script and add execute
+  install -D -m 755 ${res_path}/init ${cache}/init
   # Copy in the system shell profile
-  cp /etc/profile ${cache}/etc/profile
+  install -D /etc/profile ${cache}/etc/profile
 
   # Create archive image
   mkcpio ${cache} ${version}