1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445
|
/* Check system header files for ISO 9899:1990 (ISO C) compliance.
Copyright (C) 1996-2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Jens Schweikhardt <schweikh@noc.dfn.de>, 1996.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
/* This is a simple minded program that tries to find illegal macro
definitions in system header files. Illegal macro definitions are
those not from the implementation namespace (i.e. not starting with
an underscore) or not matching any identifier mandated by The
Standard. Some common macro names are considered okay, e.g. all those
beginning with E (which may be defined in <errno.h>) or ending in
_MAX. See the arrays prefix[] and suffix[] below for details.
In a compliant implementation no other macros can be defined, because
you could write strictly conforming programs that may fail to compile
due to syntax errors: suppose <stdio.h> defines PIPE_BUF, then the
conforming
#include <assert.h>
#include <stdio.h> <- or where the bogus macro is defined
#include <string.h>
#define STR(x) #x
#define XSTR(x) STR(x)
int main (void)
{
int PIPE_BUF = 0;
assert (strcmp ("PIPE_BUF", XSTR (PIPE_BUF)) == 0);
return 0;
}
is expected to compile and meet the assertion. If it does not, your
compiler compiles some other language than Standard C.
REQUIREMENTS:
This program calls gcc to get the list of defined macros. If you
don't have gcc you're probably out of luck unless your compiler or
preprocessor has something similar to gcc's -dM option. Tune
PRINT_MACROS in this case. This program assumes headers are found
under /usr/include and that there is a writable /tmp directory.
Tune SYSTEM_INCLUDE if your system differs.
#define BROKEN_SYSTEM if system(NULL) bombs -- one more violation
of ISO C, by the way.
OUTPUT:
Each header file name is printed, followed by illegal macro names
and their definition. For the above example, you would see
...
/usr/include/stdio.h
#define PIPE_BUF 5120
...
If your implementation does not yet incorporate Amendment 1 you
will see messages about iso646.h, wctype.h and wchar.h not being
found. */
#ifndef _GNU_SOURCE
# define _GNU_SOURCE 1
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define HEADER_MAX 256
static const char *macrofile;
/* ISO C header names including Amendment 1 (without ".h" suffix). */
static char *header[] =
{
"assert", "ctype", "errno", "float", "iso646", "limits", "locale",
"math", "setjmp", "signal", "stdarg", "stddef", "stdio", "stdlib",
"string", "time", "wchar", "wctype"
};
/* Macros with these prefixes are considered okay. */
static char *prefix[] =
{
"_", "E", "is", "str", "mem", "SIG", "FLT_", "DBL_", "LDBL_",
"LC_", "wmem", "wcs"
};
/* Macros with these suffixes are considered okay. Will not work for
parametrized macros with arguments. */
static char *suffix[] =
{
"_MAX", "_MIN"
};
/* These macros are considered okay. In fact, these are just more prefixes. */
static char *macros[] =
{
"BUFSIZ", "CHAR_BIT", "CHAR_MAX", "CHAR_MIN", "CLOCKS_PER_SEC",
"DBL_DIG", "DBL_EPSILON", "DBL_MANT_DIG", "DBL_MAX",
"DBL_MAX_10_EXP", "DBL_MAX_EXP", "DBL_MIN", "DBL_MIN_10_EXP",
"DBL_MIN_EXP", "EDOM", "EILSEQ", "EOF", "ERANGE", "EXIT_FAILURE",
"EXIT_SUCCESS", "FILENAME_MAX", "FLT_DIG", "FLT_EPSILON",
"FLT_MANT_DIG", "FLT_MAX", "FLT_MAX_10_EXP", "FLT_MAX_EXP",
"FLT_MIN", "FLT_MIN_10_EXP", "FLT_MIN_EXP", "FLT_RADIX",
"FLT_ROUNDS", "FOPEN_MAX", "HUGE_VAL", "INT_MAX", "INT_MIN",
"LC_ALL", "LC_COLLATE", "LC_CTYPE", "LC_MONETARY", "LC_NUMERIC",
"LC_TIME", "LDBL_DIG", "LDBL_EPSILON", "LDBL_MANT_DIG", "LDBL_MAX",
"LDBL_MAX_10_EXP", "LDBL_MAX_EXP", "LDBL_MIN", "LDBL_MIN_10_EXP",
"LDBL_MIN_EXP", "LONG_MAX", "LONG_MIN", "L_tmpnam", "MB_CUR_MAX",
"MB_LEN_MAX", "NDEBUG", "NULL", "RAND_MAX", "SCHAR_MAX",
"SCHAR_MIN", "SEEK_CUR", "SEEK_END", "SEEK_SET", "SHRT_MAX",
"SHRT_MIN", "SIGABRT", "SIGFPE", "SIGILL", "SIGINT", "SIGSEGV",
"SIGTERM", "SIG_DFL", "SIG_ERR", "SIG_IGN", "TMP_MAX", "UCHAR_MAX",
"UINT_MAX", "ULONG_MAX", "USHRT_MAX", "WCHAR_MAX", "WCHAR_MIN",
"WEOF", "_IOFBF", "_IOLBF", "_IONBF", "abort", "abs", "acos",
"acosf", "acosl", "and", "and_eq", "asctime", "asin", "asinf",
"asinl", "assert", "atan", "atan2", "atan2f", "atan2l", "atanf",
"atanl", "atexit", "atof", "atoi", "atol", "bitand", "bitor",
"bsearch", "btowc", "calloc", "ceil", "ceilf", "ceill", "clearerr",
"clock", "clock_t", "compl", "cos", "cosf", "cosh", "coshf",
"coshl", "cosl", "ctime", "difftime", "div", "div_t", "errno",
"exit", "exp", "expf", "expl", "fabs", "fabsf", "fabsl", "fclose",
"feof", "ferror", "fflush", "fgetc", "fgetpos", "fgets", "fgetwc",
"fgetws", "floor", "floorf", "floorl", "fmod", "fmodf", "fmodl",
"fopen", "fprintf", "fputc", "fputs", "fputwc", "fputws", "fread",
"free", "freopen", "frexp", "frexpf", "frexpl", "fscanf", "fseek",
"fsetpos", "ftell", "fwide", "fwprintf", "fwrite", "fwscanf",
"getc", "getchar", "getenv", "gets", "getwc", "getwchar", "gmtime",
"isalnum", "isalpha", "iscntrl", "isdigit", "isgraph", "islower",
"isprint", "ispunct", "isspace", "isupper", "iswalnum", "iswalpha",
"iswcntrl", "iswctype", "iswdigit", "iswgraph", "iswlower",
"iswprint", "iswpunct", "iswspace", "iswupper", "iswxdigit",
"isxdigit", "labs", "ldexp", "ldexpf", "ldexpl", "ldiv", "ldiv_t",
"localeconv", "localtime", "log", "log10", "log10f", "log10l",
"logf", "logl", "longjmp", "malloc", "mblen", "mbrlen", "mbrtowc",
"mbsinit", "mbsrtowcs", "mbstate_t", "mbstowcs", "mbtowc", "memchr",
"memcmp", "memcpy", "memmove", "memset", "mktime", "modf", "modff",
"modfl", "not", "not_eq", "offsetof", "or", "or_eq", "perror",
"pow", "powf", "powl", "printf", "ptrdiff_t", "putc", "putchar",
"puts", "putwc", "putwchar", "qsort", "raise", "rand", "realloc",
"remove", "rename", "rewind", "scanf", "setbuf", "setjmp",
"setlocale", "setvbuf", "sig_atomic_t", "signal", "sin", "sinf",
"sinh", "sinhf", "sinhl", "sinl", "size_t", "sprintf", "sqrt",
"sqrtf", "sqrtl", "srand", "sscanf", "stderr", "stdin", "stdout",
"strcat", "strchr", "strcmp", "strcoll", "strcpy", "strcspn",
"strerror", "strftime", "strlen", "strncat", "strncmp", "strncpy",
"strpbrk", "strrchr", "strspn", "strstr", "strtod", "strtok",
"strtol", "strtoul", "strxfrm", "swprintf", "swscanf", "system",
"tan", "tanf", "tanh", "tanhf", "tanhl", "tanl", "time", "time_t",
"tmpfile", "tmpnam", "tolower", "toupper", "towctrans", "towlower",
"towupper", "ungetc", "ungetwc", "va_arg", "va_copy", "va_end", "va_start",
"vfprintf", "vfwprintf", "vprintf", "vsprintf", "vswprintf",
"vwprintf", "wchar_t", "wcrtomb", "wcscat", "wcschr", "wcscmp",
"wcscoll", "wcscpy", "wcscspn", "wcsftime", "wcslen", "wcsncat",
"wcsncmp", "wcsncpy", "wcspbrk", "wcsrchr", "wcsrtombs", "wcsspn",
"wcsstr", "wcstod", "wcstok", "wcstol", "wcstombs", "wcstoul",
"wcsxfrm", "wctob", "wctomb", "wctrans", "wctrans_t", "wctype",
"wctype_t", "wint_t", "wmemchr", "wmemcmp", "wmemcpy", "wmemmove",
"wmemset", "wprintf", "wscanf", "xor", "xor_eq"
};
#define NUMBER_OF_HEADERS (sizeof header / sizeof *header)
#define NUMBER_OF_PREFIXES (sizeof prefix / sizeof *prefix)
#define NUMBER_OF_SUFFIXES (sizeof suffix / sizeof *suffix)
#define NUMBER_OF_MACROS (sizeof macros / sizeof *macros)
/* Format string to build command to invoke compiler. */
static const char fmt[] = "\
echo \"#include <%s>\" |\
%s -E -dM -ansi -pedantic %s -D_LIBC -D_ISOMAC -DNOT_IN_libc -I. \
-isystem `%s --print-prog-name=include` - 2> /dev/null > %s";
/* The compiler we use (given on the command line). */
char *CC;
/* The -I parameters for CC to find all headers. */
char *INC;
static char *xstrndup (const char *, size_t);
static const char **get_null_defines (void);
static int check_header (const char *, const char **);
int
main (int argc, char *argv[])
{
int h;
int result = 0;
const char **ignore_list;
CC = argc > 1 ? argv[1] : "gcc";
INC = argc > 2 ? argv[2] : "";
if (system (NULL) == 0)
{
puts ("Sorry, no command processor.");
return EXIT_FAILURE;
}
/* First get list of symbols which are defined by the compiler. */
ignore_list = get_null_defines ();
fputs ("Tested files:\n", stdout);
for (h = 0; h < NUMBER_OF_HEADERS; ++h)
{
char file_name[HEADER_MAX];
sprintf (file_name, "%s.h", header[h]);
result |= check_header (file_name, ignore_list);
}
/* The test suite should return errors but for now this is not
practical. Give a warning and ask the user to correct the bugs. */
return result;
}
static char *
xstrndup (const char *s, size_t n)
{
size_t len = n;
char *new = malloc (len + 1);
if (new == NULL)
return NULL;
new[len] = '\0';
return memcpy (new, s, len);
}
static const char **
get_null_defines (void)
{
char line[BUFSIZ], *command;
char **result = NULL;
size_t result_len = 0;
size_t result_max = 0;
FILE *input;
int first = 1;
macrofile = tmpnam (NULL);
command = malloc (sizeof fmt + sizeof "/dev/null" + 2 * strlen (CC)
+ strlen (INC) + strlen (macrofile));
if (command == NULL)
{
puts ("No more memory.");
exit (1);
}
sprintf (command, fmt, "/dev/null", CC, INC, CC, macrofile);
if (system (command))
{
puts ("system() returned nonzero");
free (command);
return NULL;
}
free (command);
input = fopen (macrofile, "r");
if (input == NULL)
{
printf ("Could not read %s: ", macrofile);
perror (NULL);
return NULL;
}
while (fgets (line, sizeof line, input) != NULL)
{
int i, okay = 0;
size_t endmac;
char *start, *end;
if (strlen (line) < 9 || line[7] != ' ')
{ /* "#define A" */
printf ("Malformed input, expected '#define MACRO'\ngot '%s'\n",
line);
continue;
}
if (line[8] == '_')
/* It's a safe identifier. */
continue;
if (result_len == result_max)
{
result_max += 10;
result = realloc (result, result_max * sizeof (char **));
if (result == NULL)
{
puts ("No more memory.");
exit (1);
}
}
start = &line[8];
for (end = start + 1; !isspace (*end) && *end != '\0'; ++end)
;
result[result_len] = xstrndup (start, end - start);
if (strcmp (result[result_len], "NOT_IN_libc") != 0)
{
if (first)
{
fputs ("The following identifiers will be ignored since the compiler defines them\nby default:\n", stdout);
first = 0;
}
puts (result[result_len]);
}
++result_len;
}
if (result_len == result_max)
{
result_max += 1;
result = realloc (result, result_max * sizeof (char **));
if (result == NULL)
{
puts ("No more memory.");
exit (1);
}
}
result[result_len] = NULL;
fclose (input);
remove (macrofile);
return (const char **) result;
}
static int
check_header (const char *file_name, const char **except)
{
char line[BUFSIZ], *command;
FILE *input;
int result = 0;
command = malloc (sizeof fmt + strlen (file_name) + 2 * strlen (CC)
+ strlen (INC) + strlen (macrofile));
if (command == NULL)
{
puts ("No more memory.");
exit (1);
}
puts (file_name);
sprintf (command, fmt, file_name, CC, INC, CC, macrofile);
if (system (command))
{
puts ("system() returned nonzero");
result = 1;
}
free (command);
input = fopen (macrofile, "r");
if (input == NULL)
{
printf ("Could not read %s: ", macrofile);
perror (NULL);
return 1;
}
while (fgets (line, sizeof line, input) != NULL)
{
int i, okay = 0;
size_t endmac;
const char **cpp;
if (strlen (line) < 9 || line[7] != ' ')
{ /* "#define A" */
printf ("Malformed input, expected '#define MACRO'\ngot '%s'\n",
line);
result = 1;
continue;
}
for (i = 0; i < NUMBER_OF_PREFIXES; ++i)
{
if (!strncmp (line+8, prefix[i], strlen (prefix[i]))) {
++okay;
break;
}
}
if (okay)
continue;
for (i = 0; i < NUMBER_OF_MACROS; ++i)
{
if (!strncmp (line + 8, macros[i], strlen (macros[i])))
{
++okay;
break;
}
}
if (okay)
continue;
/* Find next char after the macro identifier; this can be either
a space or an open parenthesis. */
endmac = strcspn (line + 8, " (");
if (line[8+endmac] == '\0')
{
printf ("malformed input, expected '#define MACRO VALUE'\n"
"got '%s'\n", line);
result = 1;
continue;
}
for (i = 0; i < NUMBER_OF_SUFFIXES; ++i)
{
size_t len = strlen (suffix[i]);
if (!strncmp (line + 8 + endmac - len, suffix[i], len))
{
++okay;
break;
}
}
if (okay)
continue;
if (except != NULL)
for (cpp = except; *cpp != NULL; ++cpp)
{
size_t len = strlen (*cpp);
if (!strncmp (line + 8, *cpp, len) && isspace (line[8 + len]))
{
++okay;
break;
}
}
if (!okay)
{
fputs (line, stdout);
result = 2;
}
}
fclose (input);
remove (macrofile);
return result;
}
/* EOF */
|