bin/minstall

   1 #!/bin/sh
   2
   3
   4 # A minimal replacement for 'install' that supports installing symbolic links.
   5 # Only a limited number of options are supported:
   6 # -d dir          Create a directory
   7 # -m mode         Sets a file's mode when installing
   8
   9
  10 # If these commands aren't portable, we'll need some "if (arch)" type stuff
  11 SYMLINK="ln -s"
  12 MKDIR="mkdir -p"
  13 RM="rm -f"
  14
  15 MODE=""
  16
  17 if [ "$1" = "-d" ] ; then
  18         # make a directory path
  19         $MKDIR "$2"
  20         exit 0
  21 fi
  22
  23 if [ "$1" = "-m" ] ; then
  24         # set file mode
  25         MODE=$2
  26         shift 2
  27 fi
  28
  29 # install file(s) into destination
  30 if [ $# -ge 2 ] ; then
  31
  32         # Last cmd line arg is the dest dir
  33         for FILE in $@ ; do
  34                 DEST="$FILE"
  35         done
  36
  37         # Loop over args, moving them to DEST directory
  38         I=1
  39         for FILE in $@ ; do
  40                 if [ $I = $# ] ; then
  41                         # stop, don't want to install $DEST into $DEST
  42                         exit 0
  43                 fi
  44
  45                 PWDSAVE=`pwd`
  46
  47                 # determine file's type
  48                 if [ -h "$FILE" ] ; then
  49                         #echo $FILE is a symlink
  50                         # Unfortunately, cp -d isn't universal so we have to
  51                         # use a work-around.
  52
  53                         # Use ls -l to find the target that the link points to
  54                         LL=`ls -l "$FILE"`
  55                         for L in $LL ; do
  56                                 TARGET=$L
  57                         done
  58                         #echo $FILE is a symlink pointing to $TARGET
  59
  60                         FILE=`basename "$FILE"`
  61                         # Go to $DEST and make the link
  62                         cd "$DEST"        # pushd
  63                                 $RM "$FILE"
  64                                 $SYMLINK "$TARGET" "$FILE"
  65                         cd "$PWDSAVE"     # popd
  66
  67                 elif [ -f "$FILE" ] ; then
  68                         #echo "$FILE" is a regular file
  69                         # Only copy if the files differ
  70                         if ! cmp -s $FILE $DEST/`basename $FILE`; then
  71                                 $RM "$DEST/`basename $FILE`"
  72                                 cp "$FILE" "$DEST"
  73                         fi
  74                         if [ $MODE ] ; then
  75                                 FILE=`basename "$FILE"`
  76                                 chmod $MODE "$DEST/$FILE"
  77                         fi
  78                 else
  79                         echo "Unknown type of argument: " "$FILE"
  80                         exit 1
  81                 fi
  82
  83                 I=`expr $I + 1`
  84         done
  85
  86         exit 0
  87 fi
  88
  89 # If we get here, we didn't find anything to do
  90 echo "Usage:"
  91 echo "  install -d dir                      Create named directory"
  92 echo "  install [-m mode] file [...] dest   Install files in destination"
  93