splint
splint(1) splint(1)
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NAME
splint - A tool for statically checking C programs
SYNOPSIS
splint [options]
DESCRIPTION
Splint is a tool for statically checking C programs for security vul-
nerabilities and common programming mistakes. With minimal effort,
Splint can be used as a better lint(1).If additional effort is invested
adding annotations to programs, Splint can perform stronger checks than
can be done by any standard lint. For full documentation, please see
http://www.splint.org. This man page only covers a few of the avail-
able options.
OPTIONS
-help Shows help
Initialization
These flags control directories and files used by Splint. They may be
used from the command line or in an options file, but may not be used
as control comments in the source code. Except where noted. they have
the same meaning preceded by - or +.
-tmpdir directory
Set directory for writing temp files. Default is /tmp/.
-I directory
Add directory to path searched for C include files. Note there is
no space after the I, to be consistent with C preprocessor flags.
-S directory
Add directory to path search for .lcl specification files.
-f file
Load options file <file>. If this flag is used from the command
line, the default ~/.splintrc file is not loaded. This flag may
be used in an options file to load in another options file.
-nof Prevents the default options files (./.splintrc and ~/.splintrc)
from being loaded. (Setting -nof overrides +nof, causing the
options files to be loaded normally.)
-systemdirs directories
Set directories for system files (default is "/usr/include").
Separate directories with colons (e.g.,
"/usr/include:/usr/local/lib"). Flag settings propagate to files
in a system directory. If -systemdirerrors is set, no errors are
reported for files in system directories.
Pre-processor
These flags are used to define or undefine pre-processor constants.
The -I<directory> flag is also passed to the C pre-processor.
-D initializer
Passed to the C pre-processor.
-U initializer
Passed to the C pre-processor
Libraries These flags control the creation and use of libraries.
-dump file
Save state in <file> for loading. The default extension .lcd is
added if <file> has no extension.
-load file
Load state from <file> (created by -dump). The default extension
.lcd is added if <file> has no extension. Only one library file
may be loaded.
By default, the standard library is loaded if the -load flag is
not used to load a user library. If no user library is loaded,
one of the following flags may be used to select a different
standard library. Precede the flag by + to load the described
library (or prevent a library from being loaded using nolib). See
Apppendix F for information on the provided libraries.
-nolib
Do not load any library. This prevents the standard library from
being loaded.
-ansi-lib
Use the ANSI standard library (selected by default).
-strict-lib
Use strict version of the ANSI standard library.
-posix-lib
Use the POSIX standard library.
-posix-strict-lib
Use the strict version of the POSIX standard library.
-1-lib
Use UNIX version of standard library.
-1-strict-lib
Use the strict version of the UNIX standard library.
Output
These flags control what additional information is printed by Splint.
Setting +<flag> causes the described information to be printed; setting
-<flag> prevents it. By default, all these flags are off.
-usestderr
Send error messages to standard error (instead of standard out).
-showsummary
Show a summary of all errors reported and suppressed. Counts of
suppressed errors are not necessarily correct since turning a
flag off may prevent some checking from being done to save compu-
tation, and errors that are not reported may propagate differ-
ently from when they are reported.
-showscan
Show file names are they are processed.
-showalluses
Show list of uses of all external identifiers sorted by number of
uses.
-stats
Display number of lines processed and checking time.
-timedist
Display distribution of where checking time is spent.
-quiet
Suppress herald and error count. (If quiet is not set, Splint
prints out a herald with version information before checking
begins, and a line summarizing the total number of errors
reported.)
-whichlib
Print out the standard library filename and creation information.
-limit number
At most <number> similar errors are reported consecutively. Fur-
ther errors are suppressed, and a message showing the number of
suppressed messages is printed.
Expected Errors
Normally, Splint will expect to report no errors. The exit status will
be success (0) if no errors are reported, and failure if any errors are
reported. Flags can be used to set the expected number of reported
errors. Because of the provided error suppression mechanisms, these
options should probably not be used for final checking real programs
but may be useful in developing programs using make.
-expect <number>
Exactly <number> code errors are expected. Splint will exit with
failure exit status unless <number> code errors are detected.
-Message Format
These flags control how messages are printed. They may be set at
the command line, in options files, or locally in syntactic com-
ments. The linelen and limit flags may be preceded by + or - with
the same meaning; for the other flags, + turns on the describe
printing and - turns it off. The box to the left of each flag
gives its default value.
-showcolumn
Show column number where error is found. Default: +
-showfunc
Show name of function (or macro) definition containing error. The
function name is printed once before the first message detected
in that function. Default: +
-showallconjs
Show all possible alternate types (see Section 8.2.2). Default: -
-paren-file-format
Use file(line) format in messages.
-hints
Provide hints describing an error and how a message may be sup-
pressed for the first error reported in each error class.
Default: +
-forcehints
Provide hints for all errors reported, even if the hint has
already been displayed for the same error class. Default: -
-linelen number
Set length of maximum message line to <number> characters. Splint
will split messages longer than <number> characters long into
multiple lines. Default: 80
Mode Selector Flags
Mode selects flags set the mode checking flags to predefined values.
They provide a quick coarse-grain way of controlling what classes of
errors are reported. Specific checking flags may be set after a mode
flag to override the mode settings. Mode flags may be used locally,
however the mode settings will override specific command line flag set-
tings. A warning is produced if a mode flag is used after a mode check-
ing flag has been set.
These are brief descriptions to give a general idea of what each mode
does. To see the complete flag settings in each mode, use splint -help
modes. A mode flag has the same effect when used with either + or -.
-weak Weak checking, intended for typical unannotated C code. No modi-
fies checking, macro checking, rep exposure, or clean interface
checking is done. Return values of type int may be ignored. The
types bool, int, char and user-defined enum types are all equiva-
lent. Old style declarations are unreported.
-standard
The default mode. All checking done by weak, plus modifies check-
ing, global alias checking, use all parameters, using released
storage, ignored return values or any type, macro checking,
unreachable code, infinite loops, and fall-through cases. The
types bool, int and char are distinct. Old style declarations
are reported.
-checks
Moderately strict checking. All checking done by standard, plus
must modification checking, rep exposure, return alias, memory
management and complete interfaces.
-strict
Absurdly strict checking. All checking done by checks, plus modi-
fications and global variables used in unspecified functions,
strict standard library, and strict typing of C operators. A spe-
cial reward will be presented to the first person to produce a
real program that produces no errors with strict checking.
AUTHOR
If you need to get in contact with the authors send email to
mailto:info@splint.org
or visit http://www.splint.org
SEE ALSO
lint(1)
A tool for statically checking C programs splint(1)
