That is not because of read, but because the right hand side of the pipe is executed in a subshell in bash and some other bourne type shells. It works in ksh though...
--
Note that IFS=":"; read ..... permanently changes IFS to a colon. To use IFS local to the read command (in bash / ksh93 / zsh ) you can use:
After execution of the command the IFS remains unchanged..
This User Gave Thanks to Scrutinizer For This Post:
Hi,
I am working on a custom made FTP application. The application is behaving erratically for the "ls" command. Wild card character passed to the "ls" command (like "ls *temp") is giving inconsistent results. On debuggin I have found that the "ls" command is implemented as shown below in the... (7 Replies)
Hey i have a small script in which i check if a file with that pattern exists or not. If present then i go ahead with further processing.
In the present situation i have only one file with that name and for loop is reading twice. Here is the script. And the output of debug mode. Please help.... (5 Replies)
Hello. I'm getting very odd behavior when I try to change a user's password in Solaris 8. The shell, where it used to ask for a new passwd and a confirmation, now asks FOUR times, with two success message.
This is what happens every time:
# passwd myusername
New Password: xxxxxxxx
New... (2 Replies)
Hello!
I have a question about loops and arrays. I'm trying to go through this:
for aa in 01 02 03
OrigNum=$(grep ${Orig} Ba3In2F12.prepos | wc -l)
OrigNum=$((${OrigNum} - 1))
echo ${OrigNum}
etc
It gets stuck on the second line. The error reads:
./asdf: line 30:... (5 Replies)
Hello,
basically what this script is supposed to do is showing a list of hosts that is given a number, that you will be able to choose from a list.
A check is made to verify that the chosen number is within the array and this is where things go bad and I don't know why, bizarre.
I've spent... (5 Replies)
Hi Guys,
I have this script which is being called from another script,
sh +x SCRIPTNAME.
Now this script is failing saying the source file is missing. But i was able to see the source file was present. It was renamed and but somehow the source file is removed. There is no remove command in the... (1 Reply)
I have been using firefox3.5 now for some months and noticed that some images, notably in the png format, do not display correctly: the images are not displayed at all or display in part whereby the rest of the image shows a black rectangle. Does anybody else suffer from this problem?
Desktop:... (0 Replies)
Hi.
I want to use the DHCP server that comes with vxWorks 6.4.
The DHCP server implementation has a table that contains addresses of DHCP servers that will receive a copy of all the client requests that the local server gets, thus the server acts as a dhcp relay at the same time.
Can anyone... (4 Replies)
Hi,
I am currently reading a tar file and searching for a particular word using grep e.g. Plane. At the moment, if a sentence is found with the word "Plane" the sentence itself is piped to another file.
Here is the code i am using;
for jar in 'cat jar_file.tar'; do
tar -tvf... (3 Replies)
Hi,
I am facing issues with the below:
I have a lookup file say lookup.lkp.This lookup.lkp file contains strings delimited by comma(,).
Now i want to read this command from file and execute it.
So my code below is :
Contents in the lookup.lkp file is :
c_e,m,a,`cd $BOX | ls cef_*|tail... (7 Replies)
Discussion started by: vital_parsley
7 Replies
LEARN ABOUT OPENSOLARIS
let
let(1) User Commands let(1)NAME
let - shell built-in function to evaluate one or more arithmetic expressions
SYNOPSIS
ksh
let arg...
ksh93
let [expr...]
DESCRIPTION
ksh
Each arg is a separate arithmetic expression to be evaluated.
ksh93
let evaluates each expr in the current shell environment as an arithmetic expression using ANSI C syntax. Variables names are shell vari-
ables and they are recursively evaluated as arithmetic expressions to get numerical values. let has been made obsolete by the ((...)) syn-
tax of ksh93(1) which does not require quoting of the operators to pass them as command arguments.
EXIT STATUS
ksh
ksh returns the following exit values:
0 The value of the last expression is non-zero.
1 The value of the last expression is zero.
ksh93
ksh93 returns the following exit values:
0 The last expr evaluates to a non-zero value.
>0 The last expr evaluates to 0 or an error occurred.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO ksh(1), ksh93(1), set(1), typeset(1), attributes(5)SunOS 5.11 2 Nov 2007 let(1)