09-15-2009
Standard way to remove comments is:
grep -v "^#"
This will ensure that only lines which begins with '#' are removed and will not have any side effects
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hi all,
plz can anybody tell me that if a script written for Bash shell also work for other shells and if yes , how ???
Thanks and Regards
SONAL (2 Replies)
Discussion started by: sonbag_pspl
2 Replies
2. Shell Programming and Scripting
Hi all,
I would want to remove all comments from my ruby/rails program. It may seem like a simple task, but it is not so. Because you need to have your tool implemented as like your language parser which is actually not so easy.
And am in the search of it, to remove comment from ruby/rails.... (4 Replies)
Discussion started by: thegeek
4 Replies
3. Shell Programming and Scripting
Experts,
I am newbie in shell scripting. I want to write Bash shell scripts corresponding to windows bat files. I have installed cygwin at c:\cygwin and i am trying to crate the sh file using vi editor. i am not able to understand how to use linux/unix convention for the code. following is my... (15 Replies)
Discussion started by: rajuchacha007
15 Replies
4. Shell Programming and Scripting
I have a requirement where I want to add a comment '#' in my crontab, run a process, than remove the '#' I added.
Example cron
#5,10 * * * * ls -lt /tmp
10,5 * * * * ls -lt /var
I would like to be able use sed or awk to add a '#' at the begining of each
line. After the command... (4 Replies)
Discussion started by: BeefStu
4 Replies
5. Shell Programming and Scripting
Job ad removed (1 Reply)
Discussion started by: starmation
1 Replies
6. UNIX for Dummies Questions & Answers
I have a bash shell that even though it does not look pretty is working very well. Some of the steps are repetitive, something like this:
muscle -in ${e}.4 > $e.5
read -t1
sed ':a /^>/!N;s/\n\(\)/\1/;ta' $e.5 > $e.6
read -t2
awk '/>/{fr=$3;getline;n=split ($0,a,""); for (i=1;i<=n;i++)... (2 Replies)
Discussion started by: Xterra
2 Replies
7. Homework & Coursework Questions
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
Test that exactly one command line argrument is enter from the command line. If not, display the usage... (1 Reply)
Discussion started by: jcoop12
1 Replies
8. Shell Programming and Scripting
Hi All,
I need some urgent help regarding some info.
I have a cluster of servers for which I have two scripts for management.
control.sh is a bash script meant for restarting/stopping the servers.
manger.ksh is a kshell script. It is a master script to manage restarting/stoppping and... (3 Replies)
Discussion started by: ankur328
3 Replies
9. Shell Programming and Scripting
I have tried a lot, Need your help guys.
SAS Program:
data one ; /* Data step */
Input name $; /*Dec variables*/
I want to remove the commented part(/* Data step */) alone. I have tried using sed command but it is deleting the entire line itself. i need unix command to separate this and... (6 Replies)
Discussion started by: saaisiva
6 Replies
10. Shell Programming and Scripting
Just began to learn on Shell Script. I got an exercise from my friend. I know how to make this happen in C, but I'm not familiar with Shell Script. Hope I can get some help from all of you.
I want to write a bash script to comment code blocks in a bash source file. What I mean comment is '#', I... (1 Reply)
Discussion started by: HiFuture0801
1 Replies
LEARN ABOUT OPENSOLARIS
unifdef
unifdef(1) User Commands unifdef(1)
NAME
unifdef - resolve and remove ifdef'ed lines from C program source
SYNOPSIS
unifdef [-clt] [-Dname] [-Uname] [-iDname] [-iUname] ...
[filename]
DESCRIPTION
unifdef removes ifdefed lines from a file while otherwise leaving the file alone. It is smart enough to deal with the nested ifdefs, com-
ments, single and double quotes of C syntax, but it does not do any including or interpretation of macros. Neither does it strip out com-
ments, though it recognizes and ignores them. You specify which symbols you want defined with -D options, and which you want undefined with
-U options. Lines within those ifdefs will be copied to the output, or removed, as appropriate. Any ifdef, ifndef, else, and endif lines
associated with filename will also be removed.
ifdefs involving symbols you do not specify are untouched and copied out along with their associated ifdef, else, and endiff1 lines.
If an ifdefX occurs nested inside another ifdefX, then the inside ifdef is treated as if it were an unrecognized symbol. If the same symbol
appears in more than one argument, only the first occurrence is significant.
unifdef copies its output to the standard output and will take its input from the standard input if no filename argument is given.
OPTIONS
The following options are supported:
-c Complement the normal operation. Lines that would have been removed or blanked are retained, and vice versa.
-l Replace ``lines removed'' lines with blank lines.
-t Plain text option. unifdef refrains from attempting to recognize comments and single and double quotes.
-Dname Lines associated with the defined symbol name.
-Uname Lines associated with the undefined symbol name.
-iDname Ignore, but print out, lines associated with the defined symbol name. If you use ifdefs to delimit non-C lines, such as comments
or code which is under construction, then you must tell unifdef which symbols are used for that purpose so that it will not try
to parse for quotes and comments within them.
-iUname Ignore, but print out, lines associated with the undefined symbol name.
EXIT STATUS
The following exit values are returned:
0 Successful operation.
1 Operation failed.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWbtool |
+-----------------------------+-----------------------------+
SEE ALSO
diff(1), attributes(5)
DIAGNOSTICS
Premature EOF Inappropriate else or endif.
SunOS 5.11 14 Jan 1992 unifdef(1)