NAME

SYNOPSIS

DESCRIPTION

By default, cscope examines the C (.c and .h), lex (.l), and yacc (.y) source files in the current directory. cscope may also be invoked for source files named on the command line. In either case, cscope searches the standard directories for #include files that it does not find in the current directory. cscope uses a symbol cross-reference, called cscope.out by default, to locate functions, function calls, macros, variables, and preprocessor symbols in the files.

cscope builds the symbol cross-reference the first time it is used on the source files for the program being browsed. On a subsequent invocation, cscope rebuilds the cross-reference only if a source file has changed or the list of source files is different. When the cross-reference is rebuilt, the data for the unchanged files are copied from the old cross-reference, which makes rebuilding faster than the initial build.

OPTIONS

-h

View the long usage help display.

-V

Print on the first line of screen the version number of cscope.

--help

Same as -h

--version

Same as -V

The following options can appear in any combination:

-b

Build the cross-reference only.

-C

Ignore letter case when searching.

-c

Use only ASCII characters in the cross-reference file, that is, do not compress the data.

-d

Do not update the cross-reference.

-e

Suppress the <Ctrl>-e command prompt between files.

-Fsymfile

Read symbol reference lines from symfile. (A symbol reference file is created by > and >>, and can also be read using the < command, described under ``Issuing Subsequent Requests'', below.)

-freffile

Use reffile as the cross-reference file name instead of the default "cscope.out".

-Iincdir

Look in incdir (before looking in $INCDIR, the standard place for header files, normally /usr/include) for any #include files whose names do not begin with ``/'' and that are not specified on the command line or in namefile below. (The #include files may be specified with either double quotes or angle brackets.) The incdir directory is searched in addition to the current directory (which is searched first) and the standard list (which is searched last). If more than one occurrence of -I appears, the directories are searched in the order they appear on the command line.

-inamefile

Browse through all source files whose names are listed in namefile (file names separated by spaces, tabs, or new-lines) instead of the default name list file, which is called cscope.files. If this option is specified, cscope ignores any file names appearing on the command line. The argument namefile can be set to ``-'' to accept a list of files from the standard input. Filenames in the namefile that contain whitespace have to be enclosed in "double quotes". Inside such quoted filenames, any double-quote and backslash characters have to be escaped by backslashes.

-k

``Kernel Mode'', turns off the use of the default include dir (usually /usr/include) when building the database, since kernel source trees generally do not use it.

-L

Do a single search with line-oriented output when used with the -num pattern option.

-l

Line-oriented interface (see ``Line-Oriented Interface'' below).

-[0-9]pattern

Go to input field num (counting from 0) and find pattern.

-Ppath

Prepend path to relative file names in a pre-built cross-reference file so you do not have to change to the directory where the cross-reference file was built. This option is only valid with the -d option.

-pn

Display the last n file path components instead of the default (1). Use 0 not to display the file name at all.

-q

Enable fast symbol lookup via an inverted index. This option causes cscope to create 2 more files (default names ``cscope.in.out'' and ``cscope.po.out'') in addition to the normal database. This allows a faster symbol search algorithm that provides noticeably faster lookup performance for large projects.

-R

Recurse subdirectories during search for source files.

-sdir

Look in dir for additional source files. This option is ignored if source files are given on the command line.

-T

Use only the first eight characters to match against C symbols. A regular expression containing special characters other than a period (.) will not match any symbol if its minimum length is greater than eight characters.

-U

Check file time stamps. This option will update the time stamp on the database even if no files have changed.

-u

Unconditionally build the cross-reference file (assume that all files have changed).

-v

Be more verbose in line-oriented mode. Output progress updates during database building and searches.

-X

Remove the cscope reference file and inverted indexes when exiting

files

A list of file names to operate on.

The -I, -c, -k, -p, -q, and -T options can also be in the cscope.files file.

ENVIRONMENT VARIABLES

CSCOPE_EDITOR

Overrides the EDITOR and VIEWER variables. Use this if you wish to use a different editor with cscope than that specified by your EDITOR/VIEWER variables.

CSCOPE_LINEFLAG

Format of the line number flag for your editor. By default, cscope invokes your editor via the equivalent of ``editor +N file'', where ``N'' is the line number that the editor should jump to. This format is used by both emacs and vi. If your editor needs something different, specify it in this variable, with ``%s'' as a placeholder for the line number. Ex: if your editor needs to be invoked as ``editor -#103 file'' to go to line 103, set this variable to ``-#%s''.

CSCOPE_LINEFLAG_AFTER_FILE

Set this variable to ``yes'' if your editor needs to be invoked with the line number option after the filename to be edited. To continue the example from CSCOPE_LINEFLAG, above: if your editor needs to see ``editor file -#number'', set this environment variable. Users of most standard editors (vi, emacs) do not need to set this variable.

EDITOR

Preferred editor, which defaults to vi.

HOME

Home directory, which is automatically set at login.

INCLUDEDIRS

Colon-separated list of directories to search for #include files.

SHELL

Preferred shell, which defaults to sh.

SOURCEDIRS

Colon-separated list of directories to search for additional source files.

TERM

Terminal type, which must be a screen terminal.

TERMINFO

Terminal information directory full path name. If your terminal is not in the standard terminfo directory, see curses and terminfo for how to make your own terminal description.

TMPDIR

Temporary file directory, which defaults to /var/tmp.

VIEWER

Preferred file display program (such as less), which overrides EDITOR (see above).

VPATH

A colon-separated list of directories, each of which has the same directory structure below it. If VPATH is set, cscope searches for source files in the directories specified; if it is not set, cscope searches only in the current directory.

FILES

cscope.files

Default files containing -I, -p, -q, and -T options and the list of source files (overridden by the -i option).

cscope.out

Symbol cross-reference file (overridden by the -f option), which is put in the home directory if it cannot be created in the current directory.

cscope.in.out

cscope.po.out

Default files containing the inverted index used for quick symbol searching (-q option). If you use the -f option to rename the cross-reference file (so it's not cscope.out), the names for these inverted index files will be created by adding .in and .po to the name you supply with -f. For example, if you indicated -f xyz, then these files would be named xyz.in and xyz.po.

INCDIR

Standard directory for #include files (usually /usr/include).

Notices

fname blank ( args ) white arg_decs white {

where:

fname is the function name

blank

is zero or more spaces, tabs, vtabs, form feeds or carriage returns, not including newlines

args

is any string that does not contain a ``"'' or a newline

white

is zero or more spaces, tabs, vtabs, form feeds, carriage returns or newlines

arg_decs

are zero or more argument declarations (arg_decs may include comments and white space)

It is not necessary for a function declaration to start at the beginning of a line. The return type may precede the function name; cscope will still recognize the declaration. Function definitions that deviate from this form will not be recognized by cscope.

The ``Function'' column of the search output for the menu option Find functions called by this function: input field will only display the first function called in the line, that is, for this function

e() { return (f() + g()); }

the display would be

Functions called by this function: e File Function Line a.c f 3 return(f() + g());

Occasionally, a function definition or call may not be recognized because of braces inside #if statements. Similarly, the use of a variable may be incorrectly recognized as a definition.

A typedef name preceding a preprocessor statement will be incorrectly recognized as a global definition, for example,

LDFILE * #if AR16WR

Preprocessor statements can also prevent the recognition of a global definition, for example,

char flag #ifdef ALLOCATE_STORAGE = -1 #endif ;

A function declaration inside a function is incorrectly recognized as a function call, for example,

f() { void g(); }

is incorrectly recognized as a call to g.

cscope recognizes C++ classes by looking for the class keyword, but doesn't recognize that a struct is also a class, so it doesn't recognize inline member function definitions in a structure. It also doesn't expect the class keyword in a typedef , so it incorrectly recognizes X as a definition in

typedef class X * Y;

It also doesn't recognize operator function definitions

Bool Feature::operator==(const Feature & other) { ... }

Nor does it recognize function definitions with a function pointer argument

ParseTable::Recognize(int startState, char *pattern, int finishState, void (*FinalAction)(char *)) { ... }