I had a file with 150k records in it and I ran a tr on it to remove all new lines/CR which created one large record(whoops). Is there a way to add a \n after every 39th character without using 'dd' to turn it back into the original format?
dd is way to slow.
shell is ksh. (1 Reply)
hi,
I have a string "satabeltodounixscriptingpleasecheckfortheerros"
in the above line if it contains "unix" , i need to take 5 characters after that word.
please help
thanks in advance
Satya (2 Replies)
Hi,
how can I join given arguments (not starting from the first one) to form one string, each argument separated by a space. For example, out of 5 given arguments, I'll like to start joining from the 3rd to the last. In python there exists something like ' '.join(sys.argv) and it starts joining... (5 Replies)
Hi all, I have a requirement where I am taking the first argument as argument name and storing the second argument in argument name as value.
Thanks to ppl here, i learnt to do it.:p
while ( $1 != "" )
set arg = $1
shift
set val = "$1"
echo "set... (2 Replies)
I am passing a list of strings $list and want to remove all entries with --shift=number, --sort=number/number/..., --group=number/number/... Also are removed whether upper or lower case letters are used
For example the following will all be deleted from the list
--shift=12
--shift=2324... (7 Replies)
I have a makefile and want to allow passing -01 -02 -03 for the user to define
the level of optimization he wants. Doing this gets make to send an error.
make -03
make: invalid option -- '0'
make: invalid option -- '3'
Usage: make ... (5 Replies)
Hi All,
I am new to scripting. Could you please assist me .
Here is my requirement. I have written a script that has 2 option flags defined.
-l) calls some function with the arguments passed in front of -l
-r) calls second function with the arguments passed in front of -r
*) calls the... (7 Replies)
Hello Community!
Let's say that we have some script which counts its arguments number:
arguments_count.sh:
#!/bin/sh
echo "Number of arguments="$#and some test script:
test.sh:
#!/bin/sh
my_args="1 2 3 '4 5' 6"
echo "Count of arguments when using my_args:"
./arguments_count.sh $my_args... (12 Replies)
Hi. I have a piece of code that reads and parses command line options. I'd like to alter it slightly to read from a string (that's set elsewhere in the script) rather than directly from the command line (arg). Can somebody show me how to do this? Many thanks.
My code is as follows:
typeset... (6 Replies)
Discussion started by: user052009
6 Replies
LEARN ABOUT MOJAVE
getopt
GETOPT(1) BSD General Commands Manual GETOPT(1)NAME
getopt -- parse command options
SYNOPSIS
args=`getopt optstring $*` ; errcode=$?; set -- $args
DESCRIPTION
The getopt utility is used to break up options in command lines for easy parsing by shell procedures, and to check for legal options.
Optstring is a string of recognized option letters (see getopt(3)); if a letter is followed by a colon, the option is expected to have an
argument which may or may not be separated from it by white space. The special option '--' is used to delimit the end of the options. The
getopt utility will place '--' in the arguments at the end of the options, or recognize it if used explicitly. The shell arguments ($1 $2
...) are reset so that each option is preceded by a '-' and in its own shell argument; each option argument is also in its own shell argu-
ment.
EXAMPLES
The following code fragment shows how one might process the arguments for a command that can take the options -a and -b, and the option -o,
which requires an argument.
args=`getopt abo: $*`
# you should not use `getopt abo: "$@"` since that would parse
# the arguments differently from what the set command below does.
if [ $? != 0 ]
then
echo 'Usage: ...'
exit 2
fi
set -- $args
# You cannot use the set command with a backquoted getopt directly,
# since the exit code from getopt would be shadowed by those of set,
# which is zero by definition.
for i
do
case "$i"
in
-a|-b)
echo flag $i set; sflags="${i#-}$sflags";
shift;;
-o)
echo oarg is "'"$2"'"; oarg="$2"; shift;
shift;;
--)
shift; break;;
esac
done
echo single-char flags: "'"$sflags"'"
echo oarg is "'"$oarg"'"
This code will accept any of the following as equivalent:
cmd -aoarg file file
cmd -a -o arg file file
cmd -oarg -a file file
cmd -a -oarg -- file file
SEE ALSO sh(1), getopt(3)DIAGNOSTICS
The getopt utility prints an error message on the standard error output and exits with status > 0 when it encounters an option letter not
included in optstring.
HISTORY
Written by Henry Spencer, working from a Bell Labs manual page. Behavior believed identical to the Bell version. Example changed in FreeBSD
version 3.2 and 4.0.
BUGS
Whatever getopt(3) has.
Arguments containing white space or embedded shell metacharacters generally will not survive intact; this looks easy to fix but isn't. Peo-
ple trying to fix getopt or the example in this manpage should check the history of this file in FreeBSD.
The error message for an invalid option is identified as coming from getopt rather than from the shell procedure containing the invocation of
getopt; this again is hard to fix.
The precise best way to use the set command to set the arguments without disrupting the value(s) of shell options varies from one shell ver-
sion to another.
Each shellscript has to carry complex code to parse arguments halfway correcty (like the example presented here). A better getopt-like tool
would move much of the complexity into the tool and keep the client shell scripts simpler.
BSD April 3, 1999 BSD