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 <fcntl.h>
// unavailable on some linux systems #include <ndbm.h>
#include <netdb.h>
#include <regex.h>
#include <time.h>
#include <unistd.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;
}

void nullPointer(char *p)
{
    // cppcheck-suppress ignoredReturnValue
    isatty(0);
    mkdir(p, 0);
    getcwd(0, 0);
    // cppcheck-suppress nullPointer
    readdir(0);
    // cppcheck-suppress nullPointer
    utime(NULL, 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
}

/* TODO: add configuration for fdopen
void resourceLeak_fdopen(int fd) {
    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 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);
    /* 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();
}


// valid range

void invalidFunctionArg()
{
    // cppcheck-suppress invalidFunctionArg
    usleep(-1);
    usleep(0);
    usleep(999999);
    // cppcheck-suppress invalidFunctionArg
    usleep(1000000);
}

void uninitvar(int fd)
{
    int x;
    char buf[2];
    int decimal, sign;
    double d;
    // cppcheck-suppress uninitvar
    write(x,"ab",2);
    // cppcheck-suppress uninitvar
    write(fd,buf,2);
    // cppcheck-suppress uninitvar
    write(fd,"ab",x);


    /* int regcomp(regex_t *restrict preg, const char *restrict pattern, int cflags); */
    regex_t reg;
    const char * pattern;
    int cflags;
    // cppcheck-suppress uninitvar
    regcomp(&reg, pattern, cflags);
    pattern="";
    // cppcheck-suppress uninitvar
    regcomp(&reg, pattern, cflags);
    regerror(0, &reg, 0, 0);
    // cppcheck-suppress uninitvar
    // cppcheck-suppress unreadVariable
    char *buffer = ecvt(d, 11, &decimal, &sign);
    gcvt(3.141, 2, buf);

    char *filename;
    struct utimbuf *times;
    // cppcheck-suppress uninitvar
    utime(filename, times);
    struct timeval times1[2];
    // cppcheck-suppress uninitvar
    utime(filename, times1);
}


void uninitvar_types(void)
{
    // cppcheck-suppress unassignedVariable
    blkcnt_t b;
    // cppcheck-suppress uninitvar
    b + 1;

    struct dirent d;
    // cppcheck-suppress uninitvar
    d.d_ino + 1;
}

void timet_h(struct timespec* ptp1)
{
    clockid_t clk_id;
    struct timespec* ptp;
    // cppcheck-suppress uninitvar
    clock_settime(CLOCK_REALTIME, ptp);
    // cppcheck-suppress uninitvar
    clock_settime(clk_id, ptp);
    // cppcheck-suppress uninitvar
    clock_settime(clk_id, ptp1);

    struct timespec tp;
    // cppcheck-suppress uninitvar
    clock_settime(CLOCK_REALTIME, &tp); // #6577 - false negative
    // cppcheck-suppress uninitvar
    clock_settime(clk_id, &tp);

    time_t clock = time(0);
    char buf[26];
    ctime_r(&clock, buf);
}