You can simplify your loops by controlling the special IFS variable. The shell itself can be told to split on newlines and only newlines, or on commas, or quotes, or whatever.
Also, some of those echoes look redundant.
...and most of those \n's in your code aren't real newlines:
So I suspect a lot of your code isn't doing what you think it is.
Last edited by Corona688; 08-29-2019 at 02:49 PM..
I am piping STDOUT from commands such as ifconfig and dmesg through grep, sed and awk to get the information I need.
I need to now perform some looping and branching now and have been trying to figure out how to do this on the command line.
You may ask "Why the command line? - Why not put it... (2 Replies)
hi,
my first question is :-
i would like to know how do i loop through the output of a variable.
for ex:- if i have a variable called x and echo $x gives the output like
feb 19 07
feb 20 07
feb 21 07
i would like to know how do i loop through this since it is separated and i... (1 Reply)
I have a csh that is called from autosys. It fails when it hits this code
env | grep Rep
if ( $status == 0 ) then
echo ""
else
setenv REP ""
endif
However if I run it from the command line, as opposed to from autosys (job schduler) it runs fine. I thought it might be some kind of... (2 Replies)
Dear all,
I have a text file like below.
eg.txt
abcd
efgh
ijkl
mnop
I need a script, which should read the text file eg.txt and assign each line as a parameter. This , i wil use further to pass it a java command to invoke. All inside a for loop
Need your help on this.
With... (2 Replies)
I have a .csv file and i use the below while loop to navigate through it
But i need to loop from the second line since the first line is the header
How will i do it?? please help
while IFS=, read Filename Path size readonly
do
echo "Filename -> ${Filename}"
echo "Path -> ${Path}"
echo... (8 Replies)
I have been trying this program for a long time. I am trying to read a file named "odon" line by line; read the first line, send it to do a command saved in a file "perm", once the first line has finished going through the content of the file perm, the result is saved with the number of the line.... (17 Replies)
I am working with a sh script on a solaris 9 zone (sol 10 host) that grabs information to build the configuration command line. the variables Build64, SSLopt, CONFIGopt, and CC are populated in the script. the script includes
CC=`which gcc`
CONFIGopt=' --prefix=/ --exec-prefix=/usr... (8 Replies)
This works when I try to execute normally :
echo | format | nawk '/pci@1f,4000/{print x}; {x=$0 }'
But fails when define a variable and put it in a file:
cat test
c=pci@1f,4000
echo | format | nawk "/$c/{print x}; {x=$0 }"
./test
nawk: syntax error at source line 1
context is
... (6 Replies)
I am unable to expand the value of entry variable inside the nawk command.
I tried three different nawk command as below but none of them substitute the value of entry variable.
ls *.txt | while IFS='' read -r entry; do
#nawk '/<name>/{A=1;++i} A{print >> ("cmd"i"_"$entry)}... (9 Replies)
Discussion started by: mohtashims
9 Replies
LEARN ABOUT MINIX
break
break(1) User Commands break(1)NAME
break, continue - shell built-in functions to escape from or advance within a controlling while, for, foreach, or until loop
SYNOPSIS
sh
break [n]
continue [n]
csh
break
continue
ksh
*break [n]
*continue [n]
DESCRIPTION
sh
The break utility exits from the enclosing for or while loop, if any. If n is specified, break n levels.
The continue utility resumes the next iteration of the enclosing for or while loop. If n is specified, resume at the n-th enclosing loop.
csh
The break utility resumes execution after the end of the nearest enclosing foreach or while loop. The remaining commands on the current
line are executed. This allows multilevel breaks to be written as a list of break commands, all on one line.
The continue utility continues execution of the next iteration of the nearest enclosing while or foreach loop.
ksh
The break utility exits from the enclosed for, while, until, or select loop, if any. If n is specified, then break n levels. If n is
greater than the number of enclosing loops, the outermost enclosing loop shall be exited.
The continue utility resumes the next iteration of the enclosed for, while, until, or select loop. If n is specified then resume at the n-
th enclosed loop. If n is greater than the number of enclosing loops, the outermost enclosing loop shall be used.
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 that follow 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 also that word splitting and file name genera-
tion are not performed.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO csh(1), exit(1), ksh(1), sh( 1), attributes(5)SunOS 5.10 17 Jul 2002 break(1)