As Kevin marked them red, these braces should be (), not {}; when correcting them, you are missing a closing }.
That read will fill your variable abc, but not the positional parameter $*. $* will be empty, since there aren't any parameters this way.
Try this:
To check parameters you could also use case/esac or getopts for example.
I have written a script that appears to work correctly in testing, but is coming up with a starnge error message,
script_name: test: 0403-004 Specify a parameter with this command.
Redirection or piping of stdin or stdout is allowed only with -b. (156).
The script is run by different... (2 Replies)
Hello All,
I was wondering is there any other way in Shell Scripting to redirect the errors to a output file inside a shell script with using a error status checking or a command line redirection.
Say without doing this
ksh test.ksh 2> error.txt
or without doing this ...
if ; then... (3 Replies)
i am using 2> to redirect all the standard errors that i get in my bash script.. this command needs to be given in all the statements for which the errors are to redirected..
is there a command that will catch all the errors in all the shell commands that are present inside a script .? pls help.. (7 Replies)
My script is throwing the error 'Syntax error: redirection unexpected'
My line of code..
cat nsstatustest.html | sed s/<tr><td align="left">/<tr><td align="left" bgcolor="#000000"><font color="white">/ > ztmp.Ps23zp2s.2-Fpps3-wmmm0dss3
HTML tags are getting in the way but they're needed to... (3 Replies)
I'm trying to find average of values in 2nd column in some files. Filenames have following pattern eg:
tau_2.54_even_v1.xls
tau_2.54_odd_v1.xls
tau_1.60_v1.xls
tau_800_v1.xls
#!/bin/bash
for file in pmb_mpi tau xhpl mpi_tile_io fftw ; do
for f in "2.54" "1.60" "800" ;do
if... (2 Replies)
Hi there,
I just want to know how can I redirect error msgs returned from running a command (e.g. nslookup) and then only print out the correct output using an if statement?.
I've tried the following:
where $a is a list of IPs.
but I got all the error msgs printed out to screen and... (9 Replies)
Hi gurus,
I have a question, need some of your inputs...
I have a command like this :
export LINE_COUNT=`wc -l test.dat | awk '{print $1}'`
echo $LINE_COUNT --- > gives me 2 which is fine as the file has 2 lines.
This works fine if the file test.dat is present but in case... (3 Replies)
Hi Experts,
Problem summary :
I am facing the below problem on huge files when the disk is getting full on the half way through the execution.
If the disk was already full , the commands fail & everything is fine.
Sample Code :
head_rec_data_file=`head -1 sample_file.txt`
cat... (9 Replies)
Discussion started by: Pruthviraj_shiv
9 Replies
LEARN ABOUT ULTRIX
getopt
getopt(1) General Commands Manual getopt(1)Name
getopt - parse command options
Syntax
set - - getopt optstring $*
Description
The command breaks up options in command lines for easy parsing by Shell procedures and checks for legal options. The optstring option
letters are recognized if a letter is followed by a colon, the option expects an argument which may or may not be separated from it by
white space. For further information, see
The special option, specified by two minus signs (- -), delimits the end of the options. If the delimiters are used explicitly, recognizes
it; otherwise, generates it. In either case, places the delimiter at the end of the options. The positional parameters ($1 $2 ...) of the
shell are reset so that each option is preceded by a single minus sign (-) and is in its own positional parameter; each option argument is
also parsed into its own positional parameter.
Examples
The following code fragment shows how you can process the arguments for a command that can take the options a or b, as well as the option
o, which requires an argument:
#!/bin/sh5
set -- getopt abo: $*
if [ $? != 0 ]
then
echo $USAGE
exit 2
fi
for i in $*
do
case $i in
-a | -b) FLAG=$i; shift;;
-o) OARG=$2; shift 2;;
--) shift; break;;
esac
done
This code accepts 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
Diagnostics
The command prints an error message on the standard error when it encounters an option letter not included in optstring.
See Alsosh5(1), getopt(3)getopt(1)