Oops! forgot the critical 'set $myparams' in the second approach - corrected below. If say, your "parameters" file simply contains one line of 3 parameters: arg1 arg2 arg3 and your script is (say) "myscript": echo "\$1 = $1" echo "\$2 = $2" echo "\$3 = $3" Then you can use this as: cat parameters | xargs myscript which will produce: $1 = arg1 $2 = arg2 $3 = arg3 ================================================================= However, if your "parameters" file contains more than one line: arg1 arg2 arg3 nextarg1 nextarg2 nextarg3 and you want to execute 'myscript' twice, with 3 args each time you could do this instead: while read myparams do set $myparams echo "\$1 = $1" echo "\$2 = $2" echo "\$3 = $3" done < parameters which would produce $1 = arg1 $2 = arg2 $3 = arg3 $1 = nextarg1 $2 = nextarg2 $3 = nextarg3 BTW - if your parameters file has more than one line, as above, the first approach would assign: $1 = arg1 $2 = arg2 $3 = arg3 $4 = nextarg1 $5 = nextarg2 $6 = nextarg3 Take your pick. As always "there's more than one way to skin a cat" Graham -----Original Message----- From: Mark Hounschell [mailto:markh@compro.net] Sent: Thursday, May 09, 2002 5:06 PM To: suse-linux-e@suse.com Subject: [SLE] [OT] script help? How can you use the contents of a file as command line parameters for a script? The file has 3 colums and each colume I want to be command line $1 $2 $3 respectivly for the script. $script < file does not seem to work Thanks and Regards Mark -- To unsubscribe send e-mail to suse-linux-e-unsubscribe@suse.com For additional commands send e-mail to suse-linux-e-help@suse.com Also check the archives at http://lists.suse.com
AWK also works well. It reads each line in a file, and provides each word in the line as a $ variable: example file contains: This is a line This is another line awk '{ print $1, $2, $3, $4 }' myfile This will print: This is a line This is another line On 9 May 2002 at 17:34, Graham Paul wrote:
Oops!
forgot the critical 'set $myparams' in the second approach - corrected below.
If say, your "parameters" file simply contains one line of 3 parameters:
arg1 arg2 arg3
and your script is (say) "myscript":
echo "\$1 = $1" echo "\$2 = $2" echo "\$3 = $3"
Then you can use this as:
cat parameters | xargs myscript
which will produce:
$1 = arg1 $2 = arg2 $3 = arg3
================================================================= However, if your "parameters" file contains more than one line:
arg1 arg2 arg3 nextarg1 nextarg2 nextarg3
and you want to execute 'myscript' twice, with 3 args each time you could do this instead:
while read myparams do set $myparams
echo "\$1 = $1" echo "\$2 = $2" echo "\$3 = $3" done < parameters
which would produce $1 = arg1 $2 = arg2 $3 = arg3 $1 = nextarg1 $2 = nextarg2 $3 = nextarg3
BTW - if your parameters file has more than one line, as above, the first approach would assign:
$1 = arg1 $2 = arg2 $3 = arg3 $4 = nextarg1 $5 = nextarg2 $6 = nextarg3
Take your pick. As always "there's more than one way to skin a cat"
Graham
-----Original Message----- From: Mark Hounschell [mailto:markh@compro.net] Sent: Thursday, May 09, 2002 5:06 PM To: suse-linux-e@suse.com Subject: [SLE] [OT] script help?
How can you use the contents of a file as command line parameters for a script? The file has 3 colums and each colume I want to be command line $1 $2 $3 respectivly for the script.
$script < file does not seem to work
Thanks and Regards Mark
-- To unsubscribe send e-mail to suse-linux-e-unsubscribe@suse.com For additional commands send e-mail to suse-linux-e-help@suse.com
Also check the archives at http://lists.suse.com
-- Jerry Feldman Portfolio Partner Engineering 508-467-4315 http://www.testdrive.compaq.com/linux/ Hewlett-Packard Company 200 Forest Street MRO1-3/F1 Marlboro, Ma. 01752
Jerry Feldman wrote:
AWK also works well. It reads each line in a file, and provides each word in the line as a $ variable: example file contains: This is a line This is another line
awk '{ print $1, $2, $3, $4 }' myfile
This will print: This is a line This is another line
On 9 May 2002 at 17:34, Graham Paul wrote:
Oops!
forgot the critical 'set $myparams' in the second approach - corrected below.
If say, your "parameters" file simply contains one line of 3 parameters:
arg1 arg2 arg3
and your script is (say) "myscript":
echo "\$1 = $1" echo "\$2 = $2" echo "\$3 = $3"
Then you can use this as:
cat parameters | xargs myscript
which will produce:
$1 = arg1 $2 = arg2 $3 = arg3
================================================================= However, if your "parameters" file contains more than one line:
arg1 arg2 arg3 nextarg1 nextarg2 nextarg3
and you want to execute 'myscript' twice, with 3 args each time you could do this instead:
while read myparams do set $myparams
echo "\$1 = $1" echo "\$2 = $2" echo "\$3 = $3" done < parameters
which would produce $1 = arg1 $2 = arg2 $3 = arg3 $1 = nextarg1 $2 = nextarg2 $3 = nextarg3
BTW - if your parameters file has more than one line, as above, the first approach would assign:
$1 = arg1 $2 = arg2 $3 = arg3 $4 = nextarg1 $5 = nextarg2 $6 = nextarg3
Take your pick. As always "there's more than one way to skin a cat"
Thanks Paul and Jerry. Bothe these work as described but my file of "command line paramaters" has over 1000 lines in it. Jerry's method seems fine for a short number of lines. Paul, the awk command reads the whole file before executing the next line of the script. I need to really be able to ,one line at a time, read a line of the paramaters file, take the contents of the line as paramaters, then pass them into the script, then go back until all the lines of the paramaters file is read. Well as I was writing this I got the answer I needed here it is #!/bin/bash while read 1 2 3 4 do scriptname $1 $2 $3 $4 done < paramfile This works great. Thanks again Mark
participants (3)
-
Graham Paul -
Jerry Feldman -
Mark Hounschell