batch script - read line by line

Question

I have a log file which I need to read in  line by line and pipe the line to a next loop    Firstly I grep the logfile for the  main  word  like  error   in a separate file - to keep it small  Now I need to take the seperate file and read it in line by line - each line needs to go to another loop  in these loop I grep the logs and divide it in blocks  but I stuck here    The log looks like   xx xx xx xx - -  http   www blub com something id  searchword-yes-no  200 -  something else    with a for  f loop I just get the IP instead of the complete line   How can I pipe write buffer the whole line   doesn t matter what is written per line

User · Answer

The  call  solution has some problems   It fails with many different contents  as the parameters of a CALL are parsed twice by the parser  These lines will produce more or less strange problems  one two 222 three  amp  333 four 444 five 555 555  six  amp 666 seven 777   the next line is empty  the end   Therefore you shouldn t use the value of   a with a call  better move it to a variable and then call a function with only the name of the variable    echo off SETLOCAL DisableDelayedExpansion FOR  F  usebackq delims     a in    findstr  n    t txt    do       set  myVar   a      call  processLine myVar   goto  eof   processLine SETLOCAL EnableDelayedExpansion set  line   1   set  line  line       echo  line  ENDLOCAL goto  eof

User · Answer

For those with spaces in the path  you are going to want something like this  n b  It expands out to an absolute path  rather than relative  so if your running directory path has spaces in  these count too  set SOURCE path with spaces to my log FOR  F  quot usebackq delims  quot    A IN   quot  SOURCE  quot   DO       ECHO   A    To explain   path with spaces to my log   Will not parse  because spaces  If it becomes    quot path with spaces to my log quot    It will be handled as a string rather than a file path   quot usebackq delims  quot    See docs will allow the path to be used as a path  thanks to Stephan

User · Answer

This has worked for me in the past and it will even expand environment variables in the file if it can   for  F  delims     a in  LogName txt  do        echo   a gt  gt MyDestination txt

User · Answer

Try this    echo off for  f  tokens      a in  input txt  do     echo line   a   pause   because of the tokens   everything is captured into  a  edit  to reply to your comment  you would have to do that this way    echo off for  f  tokens      a in  input txt  do call  processline   a  pause goto  eof   processline echo line     goto  eof   eof   Because of the spaces  you can t use  1  because that would only contain the part until the first space  And because the line contains quotes  you can also not use  processline    a  in combination with   1  So you need to use    which gets  1  2  3      so the whole line

[batch-file] batch script - read line by line

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