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Reading line in while loop

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# 1  
Old 09-27-2013
Reading line in while loop
Hello Team,
i have to read line by line in a while loop, and the input file has:.
Code:
 # The script will start cppunit test application to run unit tests.
-LD_LIBRARY_PATH=$CPPUNIT_HOME/lib:\
+LD_LIBRARY_PATH=$VOBTAG/SS_UnitTest/lib:\
 $VOBTAG/SS_BFD/BFDSCLI/build:\
 $VOBTAG/SS_LibPMGMT/PmgmtCAPI/build:\
 $VOBTAG/SS_LibPMGMT/PmgmtCppAPI/build:\
Index: SS_BFD/TXLDAPPlugIn/tst/cppunit/src/Main.cpp
===================================================================
--- SS_BFD/TXLDAPPlugIn/tst/cppunit/src/Main.cpp        (.../SS_BFD_4.76)       (revision 1970)
+++ SS_BFD/TXLDAPPlugIn/tst/cppunit/src/Main.cpp        (.../SS_BFD_4.82)       (revision 1970)
@@ -1,4 +1,5 @@
 #include <iostream>
+#include <cstdlib>

but my below code is generating the output with "$VOBTAG" 3 lines in a single line.
Code:
#!/bin/bash
while read line
  do
    echo $line
    echo "*****************"
  done<$1

Output:
Code:
*****************

*****************
# The script will start cppunit test application to run unit tests.
*****************
-LD_LIBRARY_PATH=$CPPUNIT_HOME/lib:+LD_LIBRARY_PATH=$VOBTAG/SS_UnitTest/lib: $VOBTAG/SS_BFD/BFDSCLI/build: $VOBTAG/SS_LibPMGMT/PmgmtCAPI/build: $VOBTAG/SS_LibPMGMT/PmgmtCppAPI/build:Index: SS_BFD/TXLDAPPlugIn/tst/cppunit/src/Main.cpp
*****************
===================================================================
*****************
--- SS_BFD/TXLDAPPlugIn/tst/cppunit/src/Main.cpp (.../SS_BFD_4.76) (revision 1970)
*****************
+++ SS_BFD/TXLDAPPlugIn/tst/cppunit/src/Main.cpp (.../SS_BFD_4.82) (revision 1970)
*****************
@@ -1,4 +1,5 @@
*****************
#include <iostream>
*****************
+#include <cstdlib>
*****************

Could you pls let me know how i can read each line separately , the input file being svn diff, i don want to consider with what the line is ending(Ex. \).

Regards,
Chandana
# 2  
Old 09-27-2013
Try:
Code:
while IFS='' read -r line
do	printf "%s\n*****************\n" "$line"
done < "$1"

Last edited by Don Cragun; 09-27-2013 at 08:22 AM.. Reason: Use $1 to name input file.
This User Gave Thanks to Don Cragun For This Post:
chandana hs
# 3  
Old 09-27-2013
Hi Chandana,
Could you pls let me know how i can read each line separately , the input file being svn diff, i don want to consider with what the line is ending(Ex. \).


actually your script reads each line separately and prints it along with that "********" line.

i don want to consider with what the line is ending - you mean, you dont want to read lines ending with "\", you wanted to read other lines only.. is that correct?
# 4  
Old 09-27-2013
Quote:
Originally Posted by inventsekar
... ... ...
Quote:
actually your script reads each line separately and prints it along with that "********" line.
... ... ...
Actually the original script removes leading spaces and tabs; if a line ends with \, the backslash is discarded and the following line is added to the current line (repeating until a line does not end with \); removes trailing spaces and tabs; and converts any sequence of one or more spaces and tabs to a single space.

Furthermore, if (after removing leading spaces and tabs) the first character is - or if \ occurs anywhere in the line (after combining lines ending with \), the results will vary from system to system (since echo handles options and arguments containing \ differently on different systems).
This User Gave Thanks to Don Cragun For This Post:
chandana hs
# 5  
Old 09-27-2013
You could try something like this as well if you don't mind the trailing slash being removed:
Code:
sed 's/\\$//g' file | while read line ; do echo $line ; echo "*****************" ; done

Last edited by Subbeh; 09-27-2013 at 11:37 AM..
This User Gave Thanks to Subbeh For This Post:
chandana hs
# 6  
Old 09-27-2013
Thanks Don...
# 7  
Old 09-27-2013
Quote:
Originally Posted by Subbeh
You could try something like this as well if you don't mind the trailing slash being removed:
Code:
sed 's/\\$//g' file | while read line ; do echo $line ; echo "*****************" ; done

And if you don't mind losing slashes embedded in the line, as well as leading and trailing whitespace. Refer to post #4.

Regards,
Alister
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