Hi
I am looping through the contents of a file as follows
cat file |while read inrec
do
echo $inrec >> $TMP
done
(obviously this isn't all i am doing as it would be pointless but for the sake of the problem this is the important bit)
The file has fields which are separated by... (1 Reply)
HI,
Supose I have the folowing strings: "unix" and "linux". I want to concatenate the two strings, inserting between them a variable number of spaces.
ex1: unix linux
ex2: unix linux
Can you help me in this simple problem?
Regards,
Elio (2 Replies)
I would like to append the numbers 1, 2, 3, 4 and so on to the lines of the file:
Adam Wilkins | Colorado | 36
John Butler | Los Angeles | 47
Cassey Johnson | Minneapolis | 25
Albert Aniston | Miami | 19
....
Tony Legler | Sacramento | 55
Matt Simmons | New York | 38
Output would look... (4 Replies)
hi gurus,
I'm executing some commands and I want to append both the command and output to a text file. Example:
echo "strings -a wicmex.o|grep '$Header'" >> tmp.txt
strings -a wicmex.o|grep '$Header' >> tmp.txt
echo "strings -a libwip.a|grep '$Header'" >> tmp.txt
strings -a libwip.a|grep... (1 Reply)
HELLO!!
I'm trying to pass a variable with in the 'sed' command (which would add some piece of code to file at a particular line). We can use
sed '{line-number}a\
alfjaljf\
aslfjsfsjafl\
adlfjaf\' file.txt
If file.txt is
Now, I would like to add the parameter 'lmn' after... (1 Reply)
Hi ,
I am writing a shell script to check pvsizes in linux box.
# for i in `cat vgs1`
> do
> echo "########### $i ###########"
> pvs|grep -i $i|awk '{print $2,$1,$5}'>pvs_$i
> pvs|grep -i $i|awk '{print $1}'|while read a
> do
> fdisk -l $a|head -2|tail -1|awk '{print $2,$3}'>pvs_$i1
>... (3 Replies)
Hi All,
I am executing this command to capture all the outputs from Error_*.txt files to all.txt file as a single output.
head -n -5 Error_*.txt > all.txt
It gives me the output in all.txt as:
==> ErrorLog_batchSearch.txt <==
2014-03-09 17:07:28,193 ERROR Cannot parse property value... (6 Replies)
Hi,
Need help. This seems simple but I tried many things but failed to get what I wanted. Below is the input file:
... (7 Replies)
Discussion started by: bunny_merah19
7 Replies
LEARN ABOUT OPENDARWIN
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