Hi all, so look, I know Im a newb and before you look at my question and get upset I want you to understand I have spent the last 7 days to get THIS far. Ive been reading up on getopts so much I even started coming up with an acronym for it!! Here's my question...hope ya can help.
I have a script that allows me to enter different options to do various things. I can check for the existence of a file and check to see if a user is logged on. What I want to do is add an -n option to invert everything so I can see when a user is logged off or when the file is not there. Is there an easy way Im missing??
I have a script that facillitates NDM (Connect::\Direct) transfer to remote hosts. This script uses getopts to parse through the parameters passed to it and to set appropriate variables based upon what was passed in.
Kickoff="mv $PATH/$FILE1 $PATH/$FILE2"
ndm_shell.ksh -p $Node -s $Source -d... (3 Replies)
I have a script which fires a command based on certain parameters. I am posting the code below..
The options needs be given such that
-u option goes along with -d and -s, -f goes with -d and -t goes with -s and -d.
1) How do I ensure that user misses any of the option then he should be... (5 Replies)
hey
need help with getopts again.
i am using getopts to read my command line options and arguments. i can manage to do for options that have only one argument
e.g srcipt_name -f 3
i am able to use getopts to do this but i am having problems two accept more than two agruments
e.g.... (1 Reply)
Hi
i have part of the scripts below ,getopt for -h or ? not working for me.
can anybody tell me if this sytax right or wrong.
#!/usr/bin/ksh
program=$(basename $0)
#####################################################################################
function usageerr
{
RC=1
... (3 Replies)
Hi,
My script will take a input file as a parameter(which is not mandatory) and also an option.
ksh my_script.sh <inputfile>
The option -n I have given is no way related to the input file.
Now the problem here is when i execute the script specifying the input file and the option(the way... (4 Replies)
Hi,
I have a program where I want to use getopts.
I want to use "-i" option and then optionally supply arguments.
If user dosent supply arguments, then also it should work.
Please tell me how to proceed.
Here is some code, this is not right code btw but a sample to understand what I want to... (1 Reply)
Hey, i need help with the use of getopts in shell script.
tried reading a lot online, but found incomplete examples (maybe complete but cudn't make out). PLzz help...explain in deatil plzzz, i am a newbie:confused: (3 Replies)
Suppose I have a code below .
while getopts a: opt
do
case $opt in
a) app_name="$OPTARG";;
*) echo "$opt is an invalid option";
exit 1;;
?) echo "The value of $OPTARG is an invalid option";
exit 1;;
esac
done
Could anyone please tell me in which case my... (1 Reply)
while getopts v OPTION
do
case $OPTION in
v) echo "Hello" ;;
*) exit 1;;
esac
done
Suppose I have script tmp.sh
Whose Signature is tmp.sh <fixed_argument>
When I run the script with tmp.sh -v "file", it echoes a hello but, when I try the other way i.e, tmp.sh... (1 Reply)
Hi. Can somebody please show me an example of how to use getopts to assign a variable if it's been passed into the script but to set a default if no value has been passed in? And also how to handle a param with multiple values ... so a sub parse (can I use a function for this?)?
Here's my code... (1 Reply)
Discussion started by: user052009
1 Replies
LEARN ABOUT CENTOS
getoptcvt
getoptcvt(1) User Commands getoptcvt(1)NAME
getoptcvt - convert to getopts to parse command options
SYNOPSIS
/usr/lib/getoptcvt [-b] filename
/usr/lib/getoptcvt
DESCRIPTION
/usr/lib/getoptcvt reads the shell script in filename, converts it to use getopts instead of getopt, and writes the results on the standard
output.
getopts is a built-in Bourne shell command used to parse positional parameters and to check for valid options. See sh(1). It supports all
applicable rules of the command syntax standard (see Rules 3-10, intro(1)). It should be used in place of the getopt command. (See the
NOTES section below.) The syntax for the shell's built-in getopts command is:
getopts optstring name [ argument...]
optstring must contain the option letters the command using getopts will recognize; if a letter is followed by a colon (:), the option is
expected to have an argument, or group of arguments, which must be separated from it by white space.
Each time it is invoked, getopts places the next option in the shell variable name and the index of the next argument to be processed in
the shell variable OPTIND. Whenever the shell or a shell script is invoked, OPTIND is initialized to 1.
When an option requires an option-argument, getopts places it in the shell variable OPTARG.
If an illegal option is encountered, ? will be placed in name.
When the end of options is encountered, getopts exits with a non-zero exit status. The special option -- may be used to delimit the end of
the options.
By default, getopts parses the positional parameters. If extra arguments (argument ...) are given on the getopts command line, getopts
parses them instead.
So that all new commands will adhere to the command syntax standard described in intro(1), they should use getopts or getopt to parse posi-
tional parameters and check for options that are valid for that command (see the NOTES section below).
OPTIONS
The following option is supported:
-b Makes the converted script portable to earlier releases of the UNIX system. /usr/lib/getoptcvt modifies the shell script in file-
name so that when the resulting shell script is executed, it determines at run time whether to invoke getopts or getopt.
EXAMPLES
Example 1: Processing the arguments for a command
The following fragment of a shell program shows how one might process the arguments for a command that can take the options -a or -b, as
well as the option -o, which requires an option-argument:
while getopts abo: c
do
case $c in
a | b) FLAG=$c;;
o) OARG=$OPTARG;;
?) echo $USAGE
exit 2;;
esac
done
shift `expr $OPTIND - 1`
Example 2: Equivalent code expressions
This code accepts any of the following as equivalent:
cmd -a -b -o "xxx z yy" filename
cmd -a -b -o "xxx z yy" -filename
cmd -ab -o xxx,z,yy filename
cmd -ab -o "xxx z yy" filename
cmd -o xxx,z,yy b a filename
ENVIRONMENT VARIABLES
See environ(5) for descriptions of the following environment variables that affect the execution of getopts: LC_CTYPE, LC_MESSAGES, and
NLSPATH.
OPTIND This variable is used by getoptcvt as the index of the next argument to be processed.
OPTARG This variable is used by getoptcvt to store the argument if an option is using arguments.
EXIT STATUS
The following exit values are returned:
0 An option, specified or unspecified by optstring, was found.
>0 The end of options was encountered or an error occurred.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
|CSI |enabled |
+-----------------------------+-----------------------------+
SEE ALSO intro(1), getopts(1), sh(1), shell_builtins(1), getopt(3C), attributes(5)DIAGNOSTICS
getopts prints an error message on the standard error when it encounters an option letter not included in optstring.
NOTES
Although the following command syntax rule (see intro(1)) relaxations are permitted under the current implementation, they should not be
used because they may not be supported in future releases of the system. As in the EXAMPLES section above, -a and -b are options, and the
option -o requires an option-argument. The following example violates Rule 5: options with option-arguments must not be grouped with
other options:
example% cmd -aboxxx filename
The following example violates Rule 6: there must be white space after an option that takes an option-argument:
example% cmd -ab oxxx filename
Changing the value of the shell variable OPTIND or parsing different sets of arguments may lead to unexpected results.
SunOS 5.10 7 Jan 2000 getoptcvt(1)