Line by line file reading... and more!


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Line by line file reading... and more!
# 1  
Old 07-20-2007
Line by line file reading... and more!

Hello,

I've got a lot of this file replication script written, but I'm having trouble finishing it off. What I need to do at the moment is run through a file one line at a time, execute the line, then check the time.

The process cannot run past 7am.

I've got a while loop set up to handle the time, I just need the innards of the loop to go through the file one line at a time.

The file looks like this:
Code:
cp /path/to/file /path/to/new/file

...... etc over and over again.

Also, if it reaches 7am and the file is not completed, its remaining contents must be saved for the next night.

Any help at all would be greatly appreciated.

Code:
hour="`date '+%H'`"
while [ $hour -ne "07" ]
do
    // read/execute next line of the file
    hour="`date '+%H'`"
done
//once it is 7am, save the remainder of the file until the next night.

The reading/executing just a single line of the file and also saving the rest of it is what I'm having troubles with
# 2  
Old 07-26-2007
line by line reading

if you do the following it should work:-

Code:
cat "$OUTFILE" | while read LINE; do
.
.
done

where $OUTFILE is the name of your file
# 3  
Old 07-26-2007
You can do something like that :
Code:
> not_proceeded_lines
hour="`date '+%H'`"
while read input_line
   if [ $hour -ne "07" ]
   then
      echo "Proceed line ..."
      hour="`date '+%H'`"
   else
      echo "$input_line" >> not_proceeded_lines
   fi
done < input_file


Jean-Pierre.
# 4  
Old 07-26-2007
alternatively you can use this:

Code:
hour="`date '+%H'`"
for input_line in `cat input_file`
do
   if [ $hour -ne "07" ]
   then
      echo "Proceed line ..."
      hour="`date '+%H'`"
   else
      echo "$input_line" >> not_proceeded_lines
   fi
done

# 5  
Old 07-26-2007
Quote:
Originally Posted by ProFiction
Hello,
I've got a lot of this file replication script written, but I'm having trouble finishing it off. What I need to do at the moment is run through a file one line at a time, execute the line, then check the time.
The process cannot run past 7am.
...
This is a duplicate post.

I already replied with a solution to the previous post:
https://www.unix.com/shell-programmin...#post302128241
# 6  
Old 07-26-2007
hey i tried this script

the output is giving like this

Code:
PROCEED THE LINE
PROCEED THE LINE
PROCEED THE LINE
PROCEED THE LINE
PROCEED THE LINE
PROCEED THE LINE
PROCEED THE LINE
PROCEED THE LINE
PROCEED THE LINE
PROCEED THE LINE
PROCEED THE LINE
PROCEED THE LINE
PROCEED THE LINE
PROCEED THE LINE
PROCEED THE LINE
PROCEED THE LINE
PROCEED THE LINE
PROCEED THE LINE
PROCEED THE LINE
PROCEED THE LINE

the script which i tried and u have given is


Code:
hour="`date '+%H'`"
for filename in `cat input_line`
do
  if [ $hour -ne "07" ]
  then
    echo "PROCEED THE LINE"
    hour="`date '+%H'`"
  else
    echo "$input_line" >> not_proceeded_line
  fi
done

can u explain this , what was it doing
# 7  
Old 07-26-2007
Could you please post the contents of the input_line file and not_proceeded_line file
Login or Register to Ask a Question

Previous Thread | Next Thread

9 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

Reading a file line by line and print required lines based on pattern

Hi All, i want to write a shell script read below file line by line and want to exclude the lines which contains empty value for MOUNTPOINT field. i am using centos 7 Operating system. want to read below file. # cat /tmp/d5 NAME="/dev/sda" TYPE="disk" SIZE="60G" OWNER="root"... (4 Replies)
Discussion started by: balu1234
4 Replies

2. Shell Programming and Scripting

Reading line by line from live log file using while loop and considering only those lines start from

Hi, I want to read a live log file line by line and considering those line which start from time stamp; Below code I am using, which read line but throws an exception when comparing line that does not contain error code tail -F /logs/COMMON-ERROR.log | while read myline; do... (2 Replies)
Discussion started by: ketanraut
2 Replies

3. Shell Programming and Scripting

Comparison of fields then increment a counter reading line by line in a file

Hi, i have a scenario were i should compare a few fields from each line then increment a variable based on that. Example file 989878|8999|Y|0|Y|N|V 989878|8999|Y|0|N|N|V 989878|8999|Y|2344|Y|N|V i have 3 conditions to check and increment a variable on every line condition 1 if ( $3... (4 Replies)
Discussion started by: selvankj
4 Replies

4. Shell Programming and Scripting

Reading text file, comparing a value in a line, and placing only part of the line in a variable?

I need some help. I would like to read in a text file. Take a variable such as ROW-D-01, compare it to what's in one line in the text file such as PROD/VM/ROW-D-01 and only input PROD/VM into a variable without the /ROW-D-01. Is this possible? any help is appreciated. (2 Replies)
Discussion started by: xChristopher
2 Replies

5. Shell Programming and Scripting

How to start reading from the nth line till the last line of a file.

Hi, For my reuirement, I have to read a file from the 2nd line till the last line<EOF>. Say, I have a file as test.txt, which as a header record in the first line followed by records in rest of the lines. for i in `cat test.txt` { echo $i } While doing the above loop, I have read... (5 Replies)
Discussion started by: machomaddy
5 Replies

6. UNIX for Dummies Questions & Answers

Parsing file, reading each line to variable, evaluating date/time stamp of each line

So, the beginning of my script will cat & grep a file with the output directed to a new file. The data I have in this file needs to be parsed, read and evaluated. Basically, I need to identify the latest date/time stamp and then calculate whether or not it is within 15 minutes of the current... (1 Reply)
Discussion started by: hynesward
1 Replies

7. Shell Programming and Scripting

[Solved] Problem in reading a file line by line till it reaches a white line

So, I want to read line-by-line a text file with unknown number of files.... So: a=1 b=1 while ; do b=`sed -n '$ap' test` a=`expr $a + 1` $here do something with b etc done the problem is that sed does not seem to recognise the $a, even when trying sed -n ' $a p' So, I cannot read... (3 Replies)
Discussion started by: hakermania
3 Replies

8. Shell Programming and Scripting

reading a file inside awk and processing line by line

Hi Sorry to multipost. I am opening the new thread because the earlier threads head was misleading to my current doubt. and i am stuck. list=`cat /u/Test/programs`; psg "ServTest" | awk -v listawk=$list '{ cmd_name=($5 ~ /^/)? $9:$8 for(pgmname in listawk) ... (6 Replies)
Discussion started by: Anteus
6 Replies

9. Shell Programming and Scripting

Reading a file line by line and processing for each line

Hi, I am a beginner in shell scripting. I have written the following script, which is supposed to process the while loop for each line in the sid_home.txt file. But I'm getting the 'end of file' unexpected for the last line. The file sid_home.txt gets generated as expected, but the script... (6 Replies)
Discussion started by: sagarparadkar
6 Replies
Login or Register to Ask a Question