Re:using the diff command

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# 1  
Old 09-12-2011
Re:using the diff command

Hi Guys

I have a situation where I would like to use the diff command but I would like to see "number" of differences and than send it through and if statement and than view the difference if greater than 1.

Eg. diff file1 file2 > than gives the "number" and I than say -

if number >1 message to fl

Thanking you guys in advance

# 2  
Old 09-12-2011
consult the manpages if your diff supports the -y option. Then you can pipe the output to wc.
diff -y file1 file2 |wc -l

# 3  
Old 09-12-2011
if you want to use diff to check if the two files are with same content. you may consider to get the return code of your diff command. (e.g. by $?)
if the two files are the same, diff returns 0;
if there is difference, diff returns 1;
if there is error in command, diff returns 2;
# 4  
Old 09-12-2011
Thanks guys.I have tried the command
diff -y file1 file2 |wc -l

and i get a return of 2.I want to view the difference only if number is greater than 2
In my case i get a return of 2 so I would like to know what the differences are.
Is it possible to use the if statement?

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