rmkdir.c

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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <unistd.h>
#include <ctype.h>

#define DOS_PATH_CHAR   '\\'
#define UNIX_PATH_CHAR  '/'

#if defined (__DJGPP__) || defined (__WIN32__)
#define DOS_PATHS
#define PATH_CHAR       '\\'
#define PATH_CHAR_STR   "\\"
#else
#define UNIX_PATHS
#define PATH_CHAR       '/'
#define PATH_CHAR_STR   "/"
#endif

void ConvertPathCharacters(char *Path)
{
    int     i;

    i = 0;
    while (Path[i] != 0)
    {
        if (Path[i] == DOS_PATH_CHAR || Path[i] == UNIX_PATH_CHAR)
        {
            Path[i] = PATH_CHAR;
        }

        i++;
    }
}

int MakeDirectory(char *Directory)
{
    char    CurrentDirectory[1024];

    getcwd(CurrentDirectory, 1024);

    if (chdir(Directory) == 0)
    {
        chdir(CurrentDirectory);
        return 0;
    }

#if defined (UNIX_PATHS) || defined (__DJGPP__)
    if (mkdir(Directory, 0755) != 0)
    {
        perror("Failed to create directory");
        return 1;
    }
#else
    if (mkdir(Directory) != 0)
    {
        perror("Failed to create directory");
        return 1;
    }
#endif

    if (chdir(Directory) != 0)
    {
        perror("Failed to change directory");
        return 1;
    }

    chdir(CurrentDirectory);

    return 0;
}

int main(int argc, char* argv[])
{
    if (argc != 2)
    {
        fprintf(stderr, "Wrong number of arguments\n");
        exit(1);
    }

    ConvertPathCharacters(argv[1]);

    return MakeDirectory(argv[1]);
}