cppcheck/test/cfg/posix.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>

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
    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_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
    setuid(42);
    // cppcheck-suppress ignoredReturnValue
    getuid();
    // cppcheck-suppress ignoredReturnValue
    access("filename", 1);
}


// 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
    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);
    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 resourceLeak
    // cppcheck-suppress redundantAssignment
    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);
}