cppcheck/test/cfg/posix.c

521 lines
13 KiB
C

// Test library configuration for posix.cfg
//
// Usage:
// $ cppcheck --check-library --library=posix --enable=information --error-exitcode=1 --inline-suppr --suppress=missingIncludeSystem test/cfg/posix.c
// =>
// No warnings about bad library configuration, unmatched suppressions, etc. exitcode=0
//
#include <stdlib.h>
#include <stdio.h> // <- FILE
#include <dirent.h>
#include <sys/mman.h>
#include <sys/socket.h>
#include <dlfcn.h>
#include <fcntl.h>
// unavailable on some linux systems #include <ndbm.h>
#include <netdb.h>
#include <regex.h>
#include <time.h>
#include <unistd.h>
#include <pthread.h>
#include <syslog.h>
#include <stdarg.h>
#include <ctype.h>
#include <stdbool.h>
bool invalidFunctionArgBool_isascii(bool b, int c)
{
// cppcheck-suppress invalidFunctionArgBool
(void)isascii(b);
// cppcheck-suppress invalidFunctionArgBool
return isascii(c != 0);
}
void uninitvar_putenv(char * envstr)
{
// No warning is expected
(void)putenv(envstr);
char * p;
// cppcheck-suppress uninitvar
(void)putenv(p);
}
void nullPointer_putenv(char * envstr)
{
// No warning is expected
(void)putenv(envstr);
char * p=NULL;
// cppcheck-suppress nullPointer
(void)putenv(p);
}
void memleak_scandir(void)
{
struct dirent **namelist;
int n = scandir(".", &namelist, NULL, alphasort);
if (n == -1) {
return;
}
// http://man7.org/linux/man-pages/man3/scandir.3.html
/* The scandir() function scans the directory dirp, calling filter() on
each directory entry. Entries for which filter() returns nonzero are
stored in strings allocated via malloc(3), sorted using qsort(3) with
the comparison function compar(), and collected in array namelist
which is allocated via malloc(3). If filter is NULL, all entries are
selected.*/
// TODO: cppcheck-suppress memleak
}
void no_memleak_scandir(void)
{
struct dirent **namelist;
int n = scandir(".", &namelist, NULL, alphasort);
if (n == -1) {
return;
}
while (n--) {
free(namelist[n]);
}
free(namelist);
}
void validCode(va_list valist_arg1, va_list valist_arg2)
{
void *ptr;
if (posix_memalign(&ptr, sizeof(void *), sizeof(void *)) == 0)
free(ptr);
syslog(LOG_ERR, "err %u", 0U);
syslog(LOG_WARNING, "warn %d %d", 5, 1);
vsyslog(LOG_EMERG, "emerg %d", valist_arg1);
vsyslog(LOG_INFO, "test %s %d %p", valist_arg2);
void* handle = dlopen("/lib.so", RTLD_NOW);
if (handle) {
dlclose(handle);
}
}
void bufferAccessOutOfBounds(int fd)
{
char a[5];
read(fd,a,5);
// cppcheck-suppress bufferAccessOutOfBounds
read(fd,a,6);
write(fd,a,5);
// cppcheck-suppress bufferAccessOutOfBounds
write(fd,a,6);
recv(fd,a,5,0);
// cppcheck-suppress bufferAccessOutOfBounds
recv(fd,a,6,0);
recvfrom(fd,a,5,0,0x0,0x0);
// cppcheck-suppress bufferAccessOutOfBounds
recvfrom(fd,a,6,0,0x0,0x0);
send(fd,a,5,0);
// cppcheck-suppress bufferAccessOutOfBounds
send(fd,a,6,0);
sendto(fd,a,5,0,0x0,0x0);
// cppcheck-suppress bufferAccessOutOfBounds
sendto(fd,a,6,0,0x0,0x0);
// cppcheck-suppress constStatement
0;
readlink("path", a, 5);
// cppcheck-suppress bufferAccessOutOfBounds
readlink("path", a, 6);
readlinkat(1, "path", a, 5);
// cppcheck-suppress bufferAccessOutOfBounds
readlinkat(1, "path", a, 6);
// This is valid
gethostname(a, 5);
// cppcheck-suppress bufferAccessOutOfBounds
gethostname(a, 6);
}
void nullPointer(char *p, int fd, pthread_mutex_t mutex)
{
// cppcheck-suppress ignoredReturnValue
isatty(0);
mkdir(p, 0);
getcwd(0, 0);
// cppcheck-suppress nullPointer
// cppcheck-suppress readdirCalled
readdir(0);
// cppcheck-suppress nullPointer
// cppcheck-suppress utimeCalled
utime(NULL, NULL);
// not implemented yet: cppcheck-suppress nullPointer
read(fd,NULL,42);
read(fd,NULL,0);
// not implemented yet: cppcheck-suppress nullPointer
write(fd,NULL,42);
write(fd,NULL,0);
// cppcheck-suppress leakReturnValNotUsed
// cppcheck-suppress nullPointer
open(NULL, 0);
// cppcheck-suppress leakReturnValNotUsed
// cppcheck-suppress nullPointer
open(NULL, 0, 0);
// cppcheck-suppress unreadVariable
// cppcheck-suppress nullPointer
int ret = access(NULL, 0);
// cppcheck-suppress ignoredReturnValue
// cppcheck-suppress leakReturnValNotUsed
// cppcheck-suppress nullPointer
fdopen(fd, NULL);
// cppcheck-suppress strtokCalled
// cppcheck-suppress nullPointer
strtok(p, NULL);
// cppcheck-suppress nullPointer
pthread_mutex_init(NULL, NULL);
// Second argument can be NULL
pthread_mutex_init(&mutex, NULL);
// cppcheck-suppress nullPointer
pthread_mutex_destroy(NULL);
// cppcheck-suppress nullPointer
pthread_mutex_lock(NULL);
// cppcheck-suppress nullPointer
(void)pthread_mutex_trylock(NULL);
// cppcheck-suppress nullPointer
pthread_mutex_unlock(NULL);
}
void memleak_getaddrinfo()
{
//TODO: nothing to report yet, see http://sourceforge.net/p/cppcheck/discussion/general/thread/d9737d5d/
struct addrinfo * res=NULL;
getaddrinfo("node", NULL, NULL, &res);
freeaddrinfo(res);
}
void memleak_mmap(int fd)
{
// cppcheck-suppress unreadVariable
void *addr = mmap(NULL, 255, PROT_NONE, MAP_PRIVATE, fd, 0);
// cppcheck-suppress memleak
}
void resourceLeak_fdopen(int fd)
{
// cppcheck-suppress unreadVariable
FILE *f = fdopen(fd, "r");
// cppcheck-suppress resourceLeak
}
void resourceLeak_mkstemp(char *template)
{
// cppcheck-suppress unreadVariable
int fp = mkstemp(template);
// cppcheck-suppress resourceLeak
}
void no_resourceLeak_mkstemp_01(char *template)
{
int fp = mkstemp(template);
close(fp);
}
int no_resourceLeak_mkstemp_02(char *template)
{
return mkstemp(template);
}
void resourceLeak_fdopendir(int fd)
{
// cppcheck-suppress unreadVariable
DIR* leak1 = fdopendir(fd);
// cppcheck-suppress resourceLeak
}
void resourceLeak_opendir(void)
{
// cppcheck-suppress unreadVariable
DIR* leak1 = opendir("abc");
// cppcheck-suppress resourceLeak
}
void resourceLeak_socket(void)
{
// cppcheck-suppress unreadVariable
int s = socket(AF_INET, SOCK_STREAM, 0);
// cppcheck-suppress resourceLeak
}
void resourceLeak_open1(void)
{
// cppcheck-suppress unreadVariable
int fd = open("file", O_RDWR | O_CREAT);
// cppcheck-suppress resourceLeak
}
void resourceLeak_open2(void)
{
// cppcheck-suppress unreadVariable
int fd = open("file", O_RDWR | O_CREAT, S_IRUSR | S_IWUSR);
// cppcheck-suppress resourceLeak
}
void noleak(int x, int y, int z)
{
DIR *p1 = fdopendir(x);
closedir(p1);
DIR *p2 = opendir("abc");
closedir(p2);
int s = socket(AF_INET,SOCK_STREAM,0);
close(s);
int fd1 = open("a", O_RDWR | O_CREAT);
close(fd1);
int fd2 = open("a", O_RDWR | O_CREAT, S_IRUSR | S_IWUSR);
close(fd2);
/* TODO: add configuration for open/fdopen
// #2830
int fd = open("path", O_RDONLY);
FILE *f = fdopen(fd, "rt");
fclose(f);
*/
}
// unused return value
void ignoredReturnValue(void *addr, int fd)
{
// cppcheck-suppress ignoredReturnValue
// cppcheck-suppress leakReturnValNotUsed
mmap(addr, 255, PROT_NONE, MAP_PRIVATE, fd, 0);
// cppcheck-suppress ignoredReturnValue
getuid();
// cppcheck-suppress ignoredReturnValue
access("filename", 1);
// no ignoredReturnValue shall be shown for
setuid(42);
}
// valid range
void invalidFunctionArg()
{
// cppcheck-suppress invalidFunctionArg
// cppcheck-suppress usleepCalled
usleep(-1);
// cppcheck-suppress usleepCalled
usleep(0);
// cppcheck-suppress usleepCalled
usleep(999999);
// cppcheck-suppress invalidFunctionArg
// cppcheck-suppress usleepCalled
usleep(1000000);
}
void invalidFunctionArg_close(int fd)
{
if (fd < 0) {
// cppcheck-suppress invalidFunctionArg
(void)close(fd);
}
}
void uninitvar(int fd)
{
int x1, x2, x3, x4;
char buf[2];
int decimal, sign;
double d;
void *p;
pthread_mutex_t mutex, mutex1, mutex2, mutex3;
// cppcheck-suppress uninitvar
write(x1,"ab",2);
// TODO cppcheck-suppress uninitvar
write(fd,buf,2); // #6325
// cppcheck-suppress uninitvar
write(fd,"ab",x2);
// cppcheck-suppress uninitvar
write(fd,p,2);
/* int regcomp(regex_t *restrict preg, const char *restrict pattern, int cflags); */
regex_t reg;
const char * pattern;
int cflags1, cflags2;
// cppcheck-suppress uninitvar
regcomp(&reg, pattern, cflags1);
pattern="";
// cppcheck-suppress uninitvar
regcomp(&reg, pattern, cflags2);
regerror(0, &reg, 0, 0);
#ifndef __CYGWIN__
// cppcheck-suppress uninitvar
// cppcheck-suppress unreadVariable
// cppcheck-suppress ecvtCalled
char *buffer = ecvt(d, 11, &decimal, &sign);
#endif
// cppcheck-suppress gcvtCalled
gcvt(3.141, 2, buf);
char *filename;
struct utimbuf *times;
// cppcheck-suppress uninitvar
// cppcheck-suppress utimeCalled
utime(filename, times);
struct timeval times1[2];
// cppcheck-suppress uninitvar
// cppcheck-suppress utimeCalled
utime(filename, times1);
// cppcheck-suppress unreadVariable
// cppcheck-suppress uninitvar
int access_ret = access("file", x3);
// cppcheck-suppress ignoredReturnValue
// cppcheck-suppress leakReturnValNotUsed
// cppcheck-suppress uninitvar
fdopen(x4, "rw");
char *strtok_arg1;
// cppcheck-suppress strtokCalled
// cppcheck-suppress uninitvar
strtok(strtok_arg1, ";");
// cppcheck-suppress uninitvar
pthread_mutex_lock(&mutex1);
// cppcheck-suppress uninitvar
(void)pthread_mutex_trylock(&mutex2);
// cppcheck-suppress uninitvar
pthread_mutex_unlock(&mutex3);
// after initialization it must be OK to call lock, trylock and unlock for this mutex
pthread_mutex_init(&mutex, NULL);
pthread_mutex_lock(&mutex);
(void)pthread_mutex_trylock(&mutex);
pthread_mutex_unlock(&mutex);
}
void uninitvar_getcwd(void)
{
char *buf;
size_t size;
// cppcheck-suppress uninitvar
(void)getcwd(buf,size);
}
void uninitvar_types(void)
{
// cppcheck-suppress unassignedVariable
blkcnt_t b;
// cppcheck-suppress uninitvar
b + 1;
struct dirent d;
// TODO cppcheck-suppress uninitvar
d.d_ino + 1;
}
void timet_h(struct timespec* ptp1)
{
clockid_t clk_id1, clk_id2, clk_id3;
struct timespec* ptp;
// cppcheck-suppress uninitvar
clock_settime(CLOCK_REALTIME, ptp);
// cppcheck-suppress uninitvar
clock_settime(clk_id1, ptp);
// cppcheck-suppress uninitvar
clock_settime(clk_id2, ptp1);
struct timespec tp;
// TODO cppcheck-suppress uninitvar
clock_settime(CLOCK_REALTIME, &tp); // #6577 - false negative
// cppcheck-suppress uninitvar
clock_settime(clk_id3, &tp);
time_t clock = time(0);
char buf[26];
// cppcheck-suppress ctime_rCalled
ctime_r(&clock, buf);
}
void dl(const char* libname, const char* func)
{
void* lib = dlopen(libname, RTLD_NOW);
// cppcheck-suppress redundantInitialization
// cppcheck-suppress resourceLeak
lib = dlopen(libname, RTLD_LAZY);
const char* funcname;
// cppcheck-suppress uninitvar
// cppcheck-suppress unreadVariable
void* sym = dlsym(lib, funcname);
// cppcheck-suppress ignoredReturnValue
dlsym(lib, "foo");
void* uninit;
// cppcheck-suppress uninitvar
dlclose(uninit);
// cppcheck-suppress resourceLeak
}
void asctime_r_test(struct tm * tm, char * bufSizeUnknown)
{
struct tm tm_uninit_data;
struct tm * tm_uninit_pointer;
char bufSize5[5];
char bufSize25[25];
char bufSize26[26];
char bufSize100[100];
// cppcheck-suppress asctime_rCalled
// cppcheck-suppress bufferAccessOutOfBounds
asctime_r(tm, bufSize5);
// cppcheck-suppress asctime_rCalled
// cppcheck-suppress bufferAccessOutOfBounds
asctime_r(tm, bufSize25);
// cppcheck-suppress asctime_rCalled
asctime_r(tm, bufSize26);
// cppcheck-suppress asctime_rCalled
asctime_r(tm, bufSize100);
// cppcheck-suppress asctime_rCalled
// cppcheck-suppress uninitvar
asctime_r(&tm_uninit_data, bufSize100);
// cppcheck-suppress asctime_rCalled
// cppcheck-suppress uninitvar
asctime_r(tm_uninit_pointer, bufSize100);
// cppcheck-suppress asctime_rCalled
asctime_r(tm, bufSizeUnknown);
}
void ctime_r_test(time_t * timep, char * bufSizeUnknown)
{
time_t time_t_uninit_data;
time_t * time_t_uninit_pointer;
char bufSize5[5];
char bufSize25[25];
char bufSize26[26];
char bufSize100[100];
// cppcheck-suppress ctime_rCalled
// cppcheck-suppress bufferAccessOutOfBounds
ctime_r(timep, bufSize5);
// cppcheck-suppress ctime_rCalled
// cppcheck-suppress bufferAccessOutOfBounds
ctime_r(timep, bufSize25);
// cppcheck-suppress ctime_rCalled
ctime_r(timep, bufSize26);
// cppcheck-suppress ctime_rCalled
ctime_r(timep, bufSize100);
// cppcheck-suppress ctime_rCalled
// cppcheck-suppress uninitvar
ctime_r(&time_t_uninit_data, bufSize100);
// cppcheck-suppress ctime_rCalled
// cppcheck-suppress uninitvar
ctime_r(time_t_uninit_pointer, bufSize100);
// cppcheck-suppress ctime_rCalled
ctime_r(timep, bufSizeUnknown);
}