bz64wrap

来自「Linux Kernel 2.6.9 for OMAP1710」· 代码 · 共 42 行

#!/bin/sh

# bz64wrap - the sending side of a bzip2 | base64 stream
# Andreas Dilger <[e-mail]>   Jan 2002


PATH=$PATH:/usr/bin:/usr/local/bin:/usr/freeware/bin

# A program to generate base64 encoding on stdout
BASE64_ENCODE="uuencode -m /dev/stdout"
BASE64_BEGIN=
BASE64_END=

BZIP=NO
BASE64=NO

# Test if we have the bzip program installed
bzip2 -c /dev/null > /dev/null 2>&1 && BZIP=YES

# Test if uuencode can handle the -m (MIME) encoding option
$BASE64_ENCODE < /dev/null > /dev/null 2>&1 && BASE64=YES

if [ $BASE64 = NO ]; then
	BASE64_ENCODE=mimencode
	BASE64_BEGIN="begin-base64 644 -"
	BASE64_END="===="

	$BASE64_ENCODE < /dev/null > /dev/null 2>&1 && BASE64=YES
fi

if [ $BZIP = NO -o $BASE64 = NO ]; then
	echo "$0: can't use bz64 encoding: bzip2=$BZIP, $BASE64_ENCODE=$BASE64"
	exit 1
fi

# Sadly, mimencode does not appear to have good "begin" and "end" markers
# like uuencode does, and it is picky about getting the right start/end of
# the base64 stream, so we handle this internally.
echo "$BASE64_BEGIN"
bzip2 -9 | $BASE64_ENCODE
echo "$BASE64_END"