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|
#!/bin/sh
# UNISRC_ID: @(#)shar.sh 27.1 84/12/17
: Make a shell archive package
# Usage: $0 [-b] [-c] [-t] [-v] files... > package
# See the manual entry for details.
# Initialize:
diagnostic='eval echo >&2' # diagnostics to stderr by default.
trap '$diagnostic "$0: quitting early"; exit 1' 1 2 3 15
base_option=FALSE # use pathnames, not basenames.
check_option=FALSE # don't generate integrity check.
USAGE='Usage: $0 \[-b] \[-c] \[-t] \[-v] files... \> package'
# Extract and digest options, if any:
#
# Un-comment the "-)" line below to treat single dashes as a no-op.
# Commented means single dashes elicit a usage diagnostic.
while [ -n "$1" ] # while there are more arguments,
do # digest them; stop when you find a non-option.
case "$1" in
-b) base_option=TRUE; shift;;
-c) check_option=TRUE; shift;;
-v) verbose=TRUE; shift;;
-t) verbose=TRUE; diagnostic='eval echo >/dev/tty'; shift;;
### -) shift;; # if uncommented, eat single dashes.
-*) $diagnostic $USAGE; exit 1;; # die at illegal options.
*) break;; # non-option found.
esac
done
# Check remaining arguments, which should be just a list of files:
if [ $# = 0 ]
then # no arguments left!
$diagnostic $USAGE
exit 1
fi
# Check the cupboard to see if the ingredients are all there:
contents='' # no files so far.
contdirs='' # no directories so far.
for arg # for all files specified,
do # establish the archive name.
if [ -f "$arg" ]
then # file exists and is not a directory.
case $base_option in
TRUE) unpack_name=`basename "$arg"` ;;
FALSE) unpack_name="$arg" ;;
esac
contents="$contents $unpack_name"
elif [ -d "$arg" ]
then # file exists and is a directory.
case $base_option in
TRUE) $diagnostic '$0: cannot archive directory "$arg" with -b option.'
exit 1 ;;
FALSE) contdirs="$contdirs $arg/ " ;;
esac
else # not a plain file and not a directory.
$diagnostic '$0: cannot archive "$arg"'
exit 1
fi
done
# Emit the prologue:
# (The leading newline is for those who type csh instead of sh.)
cat <<!!!
# This is a shell archive. Remove anything before this line,
# then unpack it by saving it in a file and typing "sh file".
#
# Wrapped by `who am i | sed 's/[ ].*//'` on `date`
!!!
# Emit the list of ingredients:
# Simple version (breaks if you shar lots of files at once):
# echo "# Contents: $contdirs$contents"
#
# Complex and cosmetic version to pack contents list onto lines that fit on
# one terminal line ("expr string : .*" prints the length of the string):
MAX=80
line='# Contents: '
for item in $contdirs $contents
do
if [ `expr "$line" : '.*' + 1 + "$item" : '.*'` -lt $MAX ]
then # length of old line + new item is short enough,
line="$line $item" # so just append it.
else # new element makes line too long,
echo "$line" # so put it on a new line.
line="# $item" # start a new line.
MAX=74 # compensate for tab width.
fi
done
echo "$line"
echo " "
# Emit the files and their separators:
for arg
do
# Decide which name to archive under.
case $base_option in
TRUE) unpack_name=`basename "$arg"`
test $verbose && $diagnostic "a - $unpack_name [from $arg]" ;;
FALSE) unpack_name="$arg"
test $verbose && $diagnostic "a - $arg" ;;
esac
# Emit either a mkdir or a cat/sed to extract the file.
if [ -d "$arg" ]
then
echo "echo mkdir - $arg"
echo "mkdir $arg"
else
echo "echo x - $unpack_name"
separator="@//E*O*F $unpack_name//"
echo "sed 's/^@//' > \"$unpack_name\" <<'$separator'"
sed -e 's/^[.~@]/@&/' -e 's/^From/@&/' "$arg"
echo $separator
fi
# Emit chmod to set permissions on the extracted file;
# this keels over if the filename contains "?".
ls -ld $arg | sed \
-e 's/^.\(...\)\(...\)\(...\).*/u=\1,g=\2,o=\3/' \
-e 's/-//g' \
-e 's?.*?chmod & '"$unpack_name?"
echo " "
done
# If the -c option was given, emit the checking epilogue:
# (The sed script converts files to basenames so it works regardless of -b.)
if [ $check_option = TRUE ]
then
echo 'echo Inspecting for damage in transit...'
echo 'temp=/tmp/shar$$; dtemp=/tmp/.shar$$'
echo 'trap "rm -f $temp $dtemp; exit" 0 1 2 3 15'
echo 'cat > $temp <<\!!!'
case $base_option in
TRUE) wc $@ | sed 's=[^ ]*/==' ;;
FALSE) wc $contents | sed 's=[^ ]*/==' ;;
esac
echo '!!!'
echo "wc $contents | sed 's=[^ ]*/==' | "'diff -b $temp - >$dtemp'
echo 'if [ -s $dtemp ]'
echo 'then echo "Ouch [diff of wc output]:" ; cat $dtemp'
echo 'else echo "No problems found."'
echo 'fi'
fi
# Finish up:
echo 'exit 0' # sharchives unpack even if junk follows.
exit 0
|
