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UNIX in a Nutshell: System V Edition

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UNIX Commands
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ctags



ctags

 [

options

] 

files

Create a list of function and macro names that are defined in the specified C, Pascal, FORTRAN, yacc, or lex source files . The output list (named tags by default) contains lines of the form: name file context where name is the function or macro name, file is the source file in which name is defined, and context is a search pattern that shows the line of code containing name . After the list of tags is created, you can invoke vi on any file and type:



:set tags=



tagsfile




:tag 



name

This switches the vi editor to the source file associated with the name listed in tagsfile (which you specify with -f ).

Options

-a

Append tag output to existing list of tags.

-B

context uses backward search patterns.

-F

context uses forward search patterns (default).

-f tagsfile

Place output in tagsfile (default is tags ).

-t

Include typedefs as tags.

-u

Update tags file to reflect new locations of functions (e.g., when functions are moved to a different source file). Old tags are deleted; new tags are appended.

-v

Produce a listing (index) of each function, source file, and page number (1 page = 64 lines). -v is intended to create a file for use with vgrind , which is available in the BSD compatibility package.

-w

Suppress warning messages.

-x

Produce a listing of each function, its line number, source file, and context.

Examples

Store tags in Taglist for all C programs:



ctags -f Taglist *.c

Update tags and store in Newlist :



ctags -u -f Newlist *.c


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