11-26-2017
Not sure I understand your doubts, so please correct me should my interpretation be wrong.
Generally, you need to differentiate between positional parameters ($1, $2, ...) of the parent shell, and those that the subshell will see. Whatever you see in you above command line is the parent shell. So -
1.- Yes if the parent shell's first positional parameter holds a starting directory.
2.- the subshell started by sh will have a concoction of parent and sub shell's pos. parameters, depending on where and how you put single and / or double quotes. As this is difficult to tell from here, I'd start with a small subset of the commands and parameters to find out.
3. Definitely NOT. shift ist the (builtin) command to shift positional parameters, sh will run a (bourne) shell as you did it in the xargs parameters.
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Have tried the search, but nothing resembles what I'd like to accomplish. I am attempting to write a script that will allow the user to input a list of data at the command prompt, then the data is used by another script for processing. I am allowing the user a list of 10 members in order to... (4 Replies)
Discussion started by: douknownam
4 Replies
2. Shell Programming and Scripting
Hi,
I have a shell script that has to taken inputs from a file say "Inputs". Now I take 2 inputs at a time. Suppose the Inputs file contains numbers like
2
3
4
5
Now I have a written a script for adding 2 numbers. When I run the script for first time 2 and 3 must be the inputs. When i run the... (4 Replies)
Discussion started by: sendhil
4 Replies
3. Shell Programming and Scripting
I am trying to extract two fields from the output of ifconfig command on one of my sun server . The output looks like :
root@e08k18:/tmp/test# ifconfig -a
lo0: flags=1000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4> mtu 8232 index 1
inet 127.0.0.1 netmask ff000000
ce0:... (9 Replies)
Discussion started by: kpatel786
9 Replies
4. UNIX for Dummies Questions & Answers
How to find the last argument in a argument line? (4 Replies)
Discussion started by: nehagupta2008
4 Replies
5. Shell Programming and Scripting
Hi,
Lets say I have a script "ss" which does this
read abc
echo $abc
read pqr
echo $pqr
Now if I want to pass and argument to only "abc" how do I do it.
If I do
echo "somevalue" | ss, it does not prompt for pqr and its value comes out as blank.
Any help is appreciated
Thanks
P (6 Replies)
Discussion started by: patjones
6 Replies
6. Shell Programming and Scripting
Can someone please help me with this SHELL script?
I need to create a script that gets a positive number n as an argument. The script must calculate the factorial of its argument. In other words, it must calculate n!=1x2x3x...xn. Note that 0!=1.
Here is a start but I have no clue how to... (3 Replies)
Discussion started by: I-1
3 Replies
7. Shell Programming and Scripting
If ($argv == “-debug”) then
Echo “in loop”
Endif
But this is not working. If I modify this code and remove “-“, then it works.
Similarly I am getting problem using grep command also
Grep “-debug” Filename
Can someone please help me on how to resolve these... (1 Reply)
Discussion started by: sarbjit
1 Replies
8. Shell Programming and Scripting
Hello,
Is there any method thorugh which script can take argument if pass otherwise if argument doesn't pass then it takes the argument from the configuration file
i.e I am workiing on a script which will run through crontab and the script will
chekout the code ,zip and copy to the... (3 Replies)
Discussion started by: rohit22hamirpur
3 Replies
9. UNIX for Advanced & Expert Users
Hi All,
I am running the script
VBoxManage list vms |sed 's/"//g' | cut -d " " -f1 > har1out.mytxt
result=`cat har1out.mytxt | grep $1'
echo $result
echo $1
{
if
then
echo pass
else
echo fail
fi (2 Replies)
Discussion started by: harsha85
2 Replies
10. Shell Programming and Scripting
I am trying to make an interactive script. Only problem my inputs are not read and correctly channeled.
Please help:
Here is my code
#!/bin/sh
PATHSCRIPT=/home/pp/tmp
#if ; then
# echo "Syntax : $0 input off lat sample"
# exit 1
# fi
echo "Choice of Graph"
echo "1 -- Type... (5 Replies)
Discussion started by: newkid.7955
5 Replies
shift(1) User Commands shift(1)
NAME
shift - shell built-in function to traverse either a shell's argument list or a list of field-separated words
SYNOPSIS
sh
shift [n]
csh
shift [variable]
ksh
* shift [n]
DESCRIPTION
sh
The positional parameters from $n+1 ... are renamed $1 ... . If n is not given, it is assumed to be 1.
csh
The components of argv, or variable, if supplied, are shifted to the left, discarding the first component. It is an error for the variable
not to be set or to have a null value.
ksh
The positional parameters from $n+1 $n+1 ... are renamed $1 ..., default n is 1. The parameter n can be any arithmetic expression that
evaluates to a non-negative number less than or equal to $#.
On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways:
1. Variable assignment lists preceding the command remain in effect when the command completes.
2. I/O redirections are processed after variable assignments.
3. Errors cause a script that contains them to abort.
4. Words, following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a vari-
able assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation are not
performed.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO
csh(1), ksh(1), sh(1), attributes(5)
SunOS 5.10 15 Apr 1994 shift(1)