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Full Discussion: A hexdumper using echo only...
Top Forums UNIX for Advanced & Expert Users A hexdumper using echo only... Post 302932607 by wisecracker on Thursday 22nd of January 2015 06:19:24 PM
Old 01-22-2015
Right guys...

This is the finished hex dumper for my new Android phone and it is running just great.
Believe it or not it is marginally quicker than the OSX version... <shock>
Code:
#!/system/bin/sh
# [./]hex </full/path/to/filename> ['delimiter_character']<CR>
if [ "$1" == "" ]
then
	echo "Usage: [./]hex </full/path/to/filename> ['delimiter_character']<CR>"
	exit 1
fi
. /storage/sdcard0/Home/bin/ENVARC
ifs_str="$IFS"
IFS=""
if [ ! -f $TMPDIR/00.HEX ]
then
	for high_nibble in 0 1 2 3 4 5 6 7 8 9 A B C D E F
	do
		for low_nibble in 0 1 2 3 4 5 6 7 8 9 A B C D E F
		do
			echo -e -n "\x$high_nibble$low_nibble" > $TMPDIR/$high_nibble$low_nibble'.HEX'
		done
	done
fi
listing=$(ls $TMPDIR/*.HEX)
count=0
char=""
hexval="$TMPDIR/00.HEX"
subscript=0
chr=""
while read -s -d '' -r -n 1 char
do
	subscript=0
	count=0
	while [ $count -le 255 ]
	do
		hexval="${listing:$subscript:${#hexval}}"
		chr=$(cat $hexval)
		if [ "$char" == "$chr" ]
		then
			if [ "$chr" == "" ]
			then
				echo -n "00$2"
				break
			fi
			if [ "$chr" != "" ]
			then
				echo -n "${hexval:$((${#hexval}-6)):2}$2"
				break
			fi
		fi
		subscript=$((subscript+${#hexval}+1))
		count=$((count+1))
		if [ $count -eq 256 ]
		then
			echo -n "0A$2"
		fi
	done
done < $1
IFS="$ifs_str"
exit 0

The absolute address(es) I had to create manually...
ENVARC is this file too...
Note that TMPDIR does not exist in Android so why not use it... ;o)
Code:
#!/system/bin/sh
# ENVARC
PATH=$PATH:/storage/sdcard0/Home/bin
TMPDIR=/storage/sdcard0/Home/tmp

Also tr and dos2unix do not exist either so this is another tool for the phone generated from minimal Android tools...
This is a dos2unix work-alike...
Code:
#!/system/bin/sh
# [./]d2u <infile> [outfile]<CR>
. /storage/sdcard0/Home/bin/ENVARC
ifs_str="$IFS"
IFS=""
newfile=""
substring=0
outfile=$2
if [ "$1" == "" ]
then
	echo "Usage: [./]d2u <infile> [outfile]..."
	exit 1
fi
if [ "$2" == "" ]
then
	outfile=$1
fi
read -s -d '' -r oldfile < $1
while [ $substring -lt ${#oldfile} ]
do
	if [ "${oldfile:$substring:1}" == $'\r' ]
	then
		substring=$((substring+1))
	else
		newfile=$newfile${oldfile:$substring:1} 
		substring=$((substring+1))
	fi
done
IFS="$ifs_str"
echo -n "$newfile" > $outfile
echo "File, $1, now converted to UNIX format..."
exit 0

 

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LEARN ABOUT SUNOS

diffmk

diffmk(1)							   User Commands							 diffmk(1)

NAME

       diffmk - mark differences between versions of a troff input file

SYNOPSIS

       diffmk oldfile newfile markedfile

DESCRIPTION

       diffmk  compares  two versions of a file and creates a third version that includes "change mark" (.mc) commands for nroff(1) and  troff(1).
       oldfile and newfile are the old and new versions of the file. diffmk generates markedfile, which,  contains  the  text  from  newfile  with
       troff(1) "change mark" requests (.mc) inserted where  newfile differs from  oldfile. When markedfile is formatted, changed or inserted text
       is shown by  | at the right margin of each line. The position of deleted text is shown by a single *.

USAGE

       See largefile(5) for the description of the behavior of diffmk when encountering files greater than or equal to 2 Gbyte ( 2**31 bytes).

EXAMPLES

       Example 1: An example of the diffmk command.

       diffmk can also be used in conjunction with the proper  troff requests to produce program listings with marked changes.	In  the  following
       command line:

       example% diffmk old.c new.c marked.c ; nroff reqs marked.c | pr

       the file reqs contains the following troff requests:

       .pl 1
       .ll 77
       .nf
       .eo
       .nh

       which eliminate page breaks, adjust the line length, set no-fill mode, ignore escape characters, and turn off hyphenation, respectively.

       If the characters  | and * are inappropriate, you might run  markedfile through	sed(1) to globally change them.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWdoc			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       diff(1), nroff(1), sed(1), troff(1), attributes(5), largefile(5)

BUGS

       Aesthetic  considerations  may  dictate	manual	adjustment of some output. File differences involving only formatting requests may produce
       undesirable output, that is, replacing .sp by .sp 2 will produce a "change mark" on the preceding or following line of output.

SunOS 5.10							    14 Sep 1992 							 diffmk(1)
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