C checkers | Guideline |
|---|
| ARR01-C. Do not apply the sizeof operator to a pointer when taking the size of an array |
| ARR02-C. Explicitly specify array bounds, even if implicitly defined by an initializer |
| ARR30-C. Do not form or use out of bounds pointers or array subscripts |
| ARR33-C. Guarantee that copies are made into storage of sufficient size |
| ARR37-C. Do not add or subtract an integer to a pointer to a non-array object |
| CON33-C. Avoid race conditions when using library functions |
| DCL00-C. Const-qualify immutable objects |
| DCL01-C. Do not reuse variable names in subscopes |
| DCL02-C. Use visually distinct identifiers |
| DCL03-C. Use a static assertion to test the value of a constant expression |
| DCL05-C. Use typedefs to improve code readability |
| DCL06-C. Use meaningful symbolic constants to represent literal values |
| DCL11-C. Understand the type issues associated with variadic functions |
| DCL13-C. Declare function parameters that are pointers to values not changed by the function as const |
| DCL30-C. Declare objects with appropriate storage durations |
| DCL31-C. Declare identifiers before using them |
| DCL32-C. Guarantee that mutually visible identifiers are unique |
| DCL37-C. Do not declare or define a reserved identifier |
| DCL38-C. Use the correct syntax when declaring flexible array members |
| ENV00-C. Do not store the pointer to the string returned by getenv() |
| ENV01-C. Do not make assumptions about the size of an environment variable |
| ENV02-C. Beware of multiple environment variables with the same effective name |
| ENV04-C. Do not call system() if you do not need a command processor |
| ENV30-C. Do not modify the object referenced by the return value of certain functions |
| ENV31-C. Do not rely on an environment pointer following an operation that may invalidate it |
| ENV32-C. All atexit handlers must return normally |
| ERR05-C. Application-independent code should provide error detection without dictating error handling |
| ERR06-C. Understand the termination behavior of assert() and abort() |
| ERR30-C. Set errno to zero before calling a library function known to set errno, and check errno only after the function returns a value indicating failure |
| ERR32-C. Do not rely on indeterminate values of errno |
| EXP01-C. Do not take the size of a pointer to determine the size of the pointed-to type |
| EXP02-C. Be aware of the short-circuit behavior of the logical AND and OR operators |
| EXP04-C. Do not perform byte-by-byte comparisons involving a structure |
| EXP05-C. Do not cast away a const qualification |
| EXP06-C. Operands to the sizeof operator should not contain side effects |
| EXP09-C. Use sizeof to determine the size of a type or variable |
| EXP10-C. Do not depend on the order of evaluation of subexpressions or the order in which side effects take place |
| EXP11-C. Do not make assumptions regarding the layout of structures with bit-field structuresfields |
| EXP12-C. Do not ignore values returned by functions |
| EXP14-C. Beware of integer promotion when performing bitwise operations on integer types smaller than int |
| EXP18-C. Do not perform assignments in selection statements |
| EXP30-C. Do not depend on order of evaluation between sequence points |
| EXP32-C. Do not access a volatile object through a non-volatile reference |
| EXP33-C. Do not reference uninitialized memory |
| EXP34-C. Do not dereference null pointers |
| EXP36-C. Do not convert pointers into more strictly aligned pointer types |
| EXP37-C. Call functions with the arguments intended by the API |
| FIO01-C. Be careful using functions that use file names for identification |
| FIO02-C. Canonicalize path names originating from untrusted sources |
| FIO04-C. Detect and handle input and output errors |
| FIO05-C. Identify files using multiple file attributes |
| FIO07-C. Prefer fseek() to rewind() |
| FIO08-C. Take care when calling remove() on an open file |
| FIO09-C. Be careful with binary data when transferring data across systems |
| FIO11-C. Take care when specifying the mode parameter of fopen() |
| FIO12-C. Prefer setvbuf() to setbuf() |
| FIO13-C. Never push back anything other than one read character |
| FIO30-C. Exclude user input from format strings |
| FIO32-C. Do not perform operations on devices that are only appropriate for files |
| FIO33-C. Detect and handle input output errors resulting in undefined behavior |
| FIO34-C. Use int to capture the return value of character IO functions |
| FIO37-C. Do not assume that fgets() returns a nonempty string when successful |
| FIO38-C. Do not use a copy of a FILE object for input and output |
| FIO39-C. Do not alternately input and output from a stream without an intervening flush or positioning call |
| FIO42-C. Ensure files are properly closed when they are no longer needed |
| FIO43-C. Do not create temporary files in shared directories |
| FIO44-C. Only use values for fsetpos() that are returned from fgetpos() |
| FLP02-C. Avoid using floating point numbers when precise computation is needed |
| FLP03-C. Detect and handle floating point errors |
| FLP30-C. Do not use floating point variables as loop counters |
| FLP33-C. Convert integers to floating point for floating point operations |
| FLP34-C. Ensure that floating point conversions are within range of the new type |
| INT01-C. Use rsize_t or size_t for all integer values representing the size of an object |
| INT05-C. Do not use input functions to convert character data if they cannot handle all possible inputs |
| INT06-C. Use strtol() or a related function to convert a string token to an integer |
| INT07-C. Use only explicitly signed or unsigned char type for numeric values |
| INT08-C. Verify that all integer values are in range |
| INT09-C. Ensure enumeration constants map to unique values |
| INT10-C. Do not assume a positive remainder when using the % operator |
| INT11-C. Take care when converting from pointer to integer or integer to pointer |
| INT12-C. Do not make assumptions about the type of a plain int bit-field when used in an expression |
| INT13-C. Use bitwise operators only on unsigned operands |
| INT14-C. Avoid performing bitwise and arithmetic operations on the same data |
| INT15-C. Use intmax_t or uintmax_t for formatted IO on programmer-defined integer types |
| INT30-C. Ensure that unsigned integer operations do not wrap |
| INT31-C. Ensure that integer conversions do not result in lost or misinterpreted data |
| INT33-C. Ensure that division and modulo operations do not result in divide-by-zero errors |
| INT34-C. Do not shift a negative number of bits or more bits than exist in the operand |
| INT35-C. Evaluate integer expressions in a larger size before comparing or assigning to that size |
| MEM00-C. Allocate and free memory in the same module, at the same level of abstraction |
| MEM01-C. Store a new value in pointers immediately after free() |
| MEM02-C. Immediately cast the result of a memory allocation function call into a pointer to the allocated type |
| MEM03-C. Clear sensitive information stored in reusable resources |
| MEM04-C. Do not perform zero-length allocations |
| MEM07-C. Ensure that the arguments to calloc(), when multiplied, do not wrap |
| MEM08-C. Use realloc() only to resize dynamically allocated arrays |
| MEM30-C. Do not access freed memory |
| MEM31-C. Free dynamically allocated memory exactly once |
| MEM32-C. Detect and handle memory allocation errors |
| MEM33-C. Allocate and copy structures containing flexible array members dynamically |
| MEM34-C. Only free memory allocated dynamically |
| MEM35-C. Allocate sufficient memory for an object |
| MSC01-C. Strive for logical completeness |
| MSC02-C. Avoid errors of omission |
| MSC05-C. Do not manipulate time_t typed values directly |
| MSC17-C. Finish every set of statements associated with a case label with a break statement |
| MSC21-C. Use robust loop termination conditions |
| MSC30-C. Do not use the rand() function for generating pseudorandom numbers |
| MSC31-C. Ensure that return values are compared against the proper type |
| MSC32-C. Ensure your random number generator is properly seeded |
| POS01-C. Check for the existence of links when dealing with files |
| POS30-C. Use the readlink() function properly |
| POS33-C. Do not use vfork() |
| POS34-C. Do not call putenv() with a pointer to an automatic variable as the argument |
| POS35-C. Avoid race conditions while checking for the existence of a symbolic link |
| POS36-C. Observe correct revocation order while relinquishing privileges |
| SIG01-C. Understand implementation-specific details regarding signal handler persistence |
| SIG30-C. Call only asynchronous-safe functions within signal handlers |
| SIG31-C. Do not access or modify shared objects in signal handlers |
| SIG32-C. Do not call longjmp() from inside a signal handler |
| SIG33-C. Do not recursively invoke the raise() function |
| SIG34-C. Do not call signal() from within interruptible signal handlers |
| STR03-C. Do not inadvertently truncate a null-terminated byte string |
| STR04-C. Use plain char for characters in the basic character set |
| STR05-C. Use pointers to const when referring to string literals |
| STR06-C. Do not assume that strtok() leaves the parse string unchanged |
| STR30-C. Do not attempt to modify string literals |
| STR31-C. Guarantee that storage for strings has sufficient space for character data and the null terminator |
| STR32-C. Null-terminate byte strings as required |
| STR33-C. Size wide character strings correctly |
| STR34-C. Cast characters to unsigned char before converting to larger integer sizes |
| STR35-C. Do not copy data from an unbounded source to a fixed-length array |
| STR36-C. Do not specify the bound of a character array initialized with a string literal |
| STR37-C. Arguments to character handling functions must be representable as an unsigned char |
