Is there a C shell command (or script anyone knows of) that will return the IP number of the system? I know that 'hostname' returns the host name, but I need the IP number, and I cannot assume access to 'nslookup'. :confused: (2 Replies)
Is there any restriction on number of parameters can be passed on to the shell script?
I found, after 9th parameter for parameter 10, it is taking parameter 1. (1 Reply)
In one of our internal scripts (unix.run), I have noticed that the following shebang.
#!/bin/sh -
for i in test1 test2 test3 ; do
.
.
.
Any idea what the - in the magic number stands for ?
And what impact does it have on the script ?
Continuing on the same script, I have the... (3 Replies)
I am writing script in c shell and using this script to read the command line arguments, but it is not working. Pl. someone let me know what is the problem.
#!/bin/csh -f
if ($#argv <> 2) then
echo "you must give exactly two parameters"
else
set name1 = $argv
... (1 Reply)
Here's my work of testing whether a number input is perfect or not..
echo Enter a number
read no
i=1
ans=0
while
do
if
then
ans='expr $ans + $i'
fi
i='expr $i + 1'
done
if
then
echo $no is perfect
else
echo $no is NOT perfect
fi (12 Replies)
Hello gurus,
I have three korn shell script 3.1, 3.2, 3.3. I would like to call three shell script in one shell script.
i m looking for something like this
call 3.1;
If 3.1 = "complete" then
call 3.2;
if 3.2 = ''COMPlete" then
call 3.3;
else
exit
The... (1 Reply)
Hi I am new in shell,
I am trying to create a small script that can do exit if a script is executed when argument not 2
#!/bin/sh
if ; then
echo greater
exit 1;
elif ; then
echo less
exit 1;
fiit keeps returning me
whatever number of argument I... (1 Reply)
I have one text file
1 2 3
a 5
4 4 3
where i want to print the line number
while read line
do
line_no=`awk '{print NR, $0}'`
echo 'In line no $line_no'
done <$txt_file
If i run the above code, it will print
'In line no 1 1 2 3'
It prints the line number with the whole... (3 Replies)
Hello Forum,
I am receiving a file daily like ASAD but at the end there is a counter like 0012 (4 digits) so my every next file +1
I want to write a control script and check the last sequence number.Let's say If I receive a file ASAD0012 then after receiving this file I wan to say that... (5 Replies)
Discussion started by: cemokam65
5 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