display typedefs, structs, unions and functions provided by a header file

cpp /usr/include/stdio.h | grep -v '^#' | grep -v '^$' | less
will display typedefs, structs, unions and functions declared in 'stdio.h'(checkout _IO_FILE structure). It will be helpful if we want to know what a particular header file will offer to us. Command 'cpp' is GNU's C Preprocessor.

What Others Think

cpp /usr/include/stdio.h | awk '!/^#/ && !/^$/' | less
sputnick · 488 weeks and 5 days ago
Great!! I learnt how we can simplify awk, normally I'm using, awk '$0 !~ /^#/ && $0 !~ /&$/ {print $0;}' to achieve what you did.
mohan43u · 488 weeks and 4 days ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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