| .. title:: clang-tidy - cert-err33-c |
| |
| cert-err33-c |
| ============ |
| |
| Warns on unused function return values. Many of the standard library functions |
| return a value that indicates if the call was successful. Ignoring the returned |
| value can cause unexpected behavior if an error has occured. The following |
| functions are checked: |
| |
| * aligned_alloc() |
| * asctime_s() |
| * at_quick_exit() |
| * atexit() |
| * bsearch() |
| * bsearch_s() |
| * btowc() |
| * c16rtomb() |
| * c32rtomb() |
| * calloc() |
| * clock() |
| * cnd_broadcast() |
| * cnd_init() |
| * cnd_signal() |
| * cnd_timedwait() |
| * cnd_wait() |
| * ctime_s() |
| * fclose() |
| * fflush() |
| * fgetc() |
| * fgetpos() |
| * fgets() |
| * fgetwc() |
| * fopen() |
| * fopen_s() |
| * fprintf() |
| * fprintf_s() |
| * fputc() |
| * fputs() |
| * fputwc() |
| * fputws() |
| * fread() |
| * freopen() |
| * freopen_s() |
| * fscanf() |
| * fscanf_s() |
| * fseek() |
| * fsetpos() |
| * ftell() |
| * fwprintf() |
| * fwprintf_s() |
| * fwrite() |
| * fwscanf() |
| * fwscanf_s() |
| * getc() |
| * getchar() |
| * getenv() |
| * getenv_s() |
| * gets_s() |
| * getwc() |
| * getwchar() |
| * gmtime() |
| * gmtime_s() |
| * localtime() |
| * localtime_s() |
| * malloc() |
| * mbrtoc16() |
| * mbrtoc32() |
| * mbsrtowcs() |
| * mbsrtowcs_s() |
| * mbstowcs() |
| * mbstowcs_s() |
| * memchr() |
| * mktime() |
| * mtx_init() |
| * mtx_lock() |
| * mtx_timedlock() |
| * mtx_trylock() |
| * mtx_unlock() |
| * printf_s() |
| * putc() |
| * putwc() |
| * raise() |
| * realloc() |
| * remove() |
| * rename() |
| * setlocale() |
| * setvbuf() |
| * scanf() |
| * scanf_s() |
| * signal() |
| * snprintf() |
| * snprintf_s() |
| * sprintf() |
| * sprintf_s() |
| * sscanf() |
| * sscanf_s() |
| * strchr() |
| * strerror_s() |
| * strftime() |
| * strpbrk() |
| * strrchr() |
| * strstr() |
| * strtod() |
| * strtof() |
| * strtoimax() |
| * strtok() |
| * strtok_s() |
| * strtol() |
| * strtold() |
| * strtoll() |
| * strtoumax() |
| * strtoul() |
| * strtoull() |
| * strxfrm() |
| * swprintf() |
| * swprintf_s() |
| * swscanf() |
| * swscanf_s() |
| * thrd_create() |
| * thrd_detach() |
| * thrd_join() |
| * thrd_sleep() |
| * time() |
| * timespec_get() |
| * tmpfile() |
| * tmpfile_s() |
| * tmpnam() |
| * tmpnam_s() |
| * tss_create() |
| * tss_get() |
| * tss_set() |
| * ungetc() |
| * ungetwc() |
| * vfprintf() |
| * vfprintf_s() |
| * vfscanf() |
| * vfscanf_s() |
| * vfwprintf() |
| * vfwprintf_s() |
| * vfwscanf() |
| * vfwscanf_s() |
| * vprintf_s() |
| * vscanf() |
| * vscanf_s() |
| * vsnprintf() |
| * vsnprintf_s() |
| * vsprintf() |
| * vsprintf_s() |
| * vsscanf() |
| * vsscanf_s() |
| * vswprintf() |
| * vswprintf_s() |
| * vswscanf() |
| * vswscanf_s() |
| * vwprintf_s() |
| * vwscanf() |
| * vwscanf_s() |
| * wcrtomb() |
| * wcschr() |
| * wcsftime() |
| * wcspbrk() |
| * wcsrchr() |
| * wcsrtombs() |
| * wcsrtombs_s() |
| * wcsstr() |
| * wcstod() |
| * wcstof() |
| * wcstoimax() |
| * wcstok() |
| * wcstok_s() |
| * wcstol() |
| * wcstold() |
| * wcstoll() |
| * wcstombs() |
| * wcstombs_s() |
| * wcstoumax() |
| * wcstoul() |
| * wcstoull() |
| * wcsxfrm() |
| * wctob() |
| * wctrans() |
| * wctype() |
| * wmemchr() |
| * wprintf_s() |
| * wscanf() |
| * wscanf_s() |
| |
| This check is an alias of check `bugprone-unused-return-value <bugprone-unused-return-value.html>`_ |
| with a fixed set of functions. |
| |
| The check corresponds to a part of CERT C Coding Standard rule `ERR33-C. |
| Detect and handle standard library errors |
| <https://wiki.sei.cmu.edu/confluence/display/c/ERR33-C.+Detect+and+handle+standard+library+errors>`_. |
| The list of checked functions is taken from the rule, with following exception: |
| |
| * The check can not differentiate if a function is called with ``NULL`` |
| argument. Therefore the following functions are not checked: |
| ``mblen``, ``mbrlen``, ``mbrtowc``, ``mbtowc``, ``wctomb``, ``wctomb_s`` |
