How to read file and load data into a script as variable
I need to read a text file that contain columns of data, i need to read 1st column as a function to call, and others are the data i need to get into a ksh script.
I am quite new to ksh scripting, i am not very sure how to read each row line by line and the data in each columns of that line, set them as variables into my ksh script.
I am a FORTRAN guy and not a UNIX expert by any means so sorry if this sounds dumb, but all I want to do is have a UNIX script which reads data from a file (say 1000 lines worth, each row is a file name) and store it in an array to perform an operation on later. As maddeningly simple as this... (2 Replies)
Since i'm new to scripting i'm findind it difficult to code a script. The script has to be an executable with 2 paramters passed to it.The Parameters are
1. The Control file name(.ctl file)
2. The Data file name(.csv file)
Does anybody have an idea about it? :confused: (3 Replies)
Hi....can you guys help me out in this script??
Below is a portion text file and it contains these:
GEF001 000093625 MKL002510 000001 000000 000000 000000 000000 000000 000001
GEF001 000093625 MKL003604 000001 000000 000000 000000 000000 000000 000001
GEF001 000093625 MKL005675 000001... (1 Reply)
Hello! I think this should be an easy solution. I have a large file with many fields of data. The first field has a unique identifier (a subject number) for every record for a chunk of data. Something like this:
There were ten experimental conditions (ec), but the ec is identified by only... (11 Replies)
I need help as to how to write a script in Unix for the following:
We have 3 servers;
The mainframe will FTP them to a folder. In that folder we will need the script to look and see if the specific file name is there and load it to the correct table.
Can anyone pls help me out with... (2 Replies)
I have written a perl scripts which loads the data.
Now i want to modify the script, to Archive the Input file after the successful load of data.
Can anyone please share it and help me ....
Thanks. (2 Replies)
In the hello.htm have the sentenses:
Hello $name
How are you?
The perl script:
$name = "David";
open(HEADER,"hello.htm");
while(<HEADER>) { $html .= $_; }
close(HEADER);
print "$html";I making something about template. But it can't process the $name variable. (4 Replies)
We have the data looks like below in a log file.
I want to generat files based on the string between two hash(#) symbol like below
Source:
#ext1#test1.tale2 drop
#ext1#test11.tale21 drop
#ext1#test123.tale21 drop
#ext2#test1.tale21 drop
#ext2#test12.tale21 drop
#ext3#test11.tale21 drop... (5 Replies)
Hi,
I have many files but with only 2 names , I want to load the data of that file into database through sqlldr with single control file. how can i do that ?????
Example:
switch_file
switch_file
billing_file
billing_file
now these files should be loaded into same database but different... (1 Reply)
Discussion started by: niti_sharma
1 Replies
LEARN ABOUT X11R4
seek
seek(n) Tcl Built-In Commands seek(n)
__________________________________________________________________________________________________________________________________________________NAME
seek - Change the access position for an open channel
SYNOPSIS
seek channelId offset ?origin?
_________________________________________________________________DESCRIPTION
Changes the current access position for channelId.
ChannelId must be an identifier for an open channel such as a Tcl standard channel (stdin, stdout, or stderr), the return value from an
invocation of open or socket, or the result of a channel creation command provided by a Tcl extension.
The offset and origin arguments specify the position at which the next read or write will occur for channelId. Offset must be an integer
(which may be negative) and origin must be one of the following:
start The new access position will be offset bytes from the start of the underlying file or device.
current The new access position will be offset bytes from the current access position; a negative offset moves the access position back-
wards in the underlying file or device.
end The new access position will be offset bytes from the end of the file or device. A negative offset places the access position
before the end of file, and a positive offset places the access position after the end of file.
The origin argument defaults to start.
The command flushes all buffered output for the channel before the command returns, even if the channel is in nonblocking mode. It also
discards any buffered and unread input. This command returns an empty string. An error occurs if this command is applied to channels
whose underlying file or device does not support seeking.
Note that offset values are byte offsets, not character offsets. Both seek and tell operate in terms of bytes, not characters, unlike
read.
EXAMPLES
Read a file twice:
set f [open file.txt]
set data1 [read $f]
seek $f 0
set data2 [read $f]
close $f
# $data1 == $data2 if the file wasn't updated
Read the last 10 bytes from a file:
set f [open file.data]
# This is guaranteed to work with binary data but
# may fail with other encodings...
fconfigure $f -translation binary
seek $f -10 end
set data [read $f 10]
close $f
SEE ALSO
file(n), open(n), close(n), gets(n), tell(n), Tcl_StandardChannels(3)KEYWORDS
access position, file, seek
Tcl 8.1 seek(n)