java-jar-launch.c++

#include<cstdlib>
#include<stdio.h>
#include<string.h>
#include<string>
#include <unistd.h>

using namespace std;

void usage()
{
    printf("Usage: java-jar-lauch <your-jar-here>\n");
}

void dirUp(char* myDir)
{
    int len = strlen(myDir);
    while (1)
    {
        len--;
        if (len == 0)
        {
            printf("Invalid folder!");
            exit(-1);
        }
        if (myDir[len] == '/')
        {
            myDir[len+1] = '\0';
            return;
        }
    }

}


int main(int argc, char** args)
{
    if (argc == 1)
    {
        usage();
        return 0;
    }

    char* workingDir = new char[strlen(args[1])];
    strcpy(workingDir, args[1]);
    dirUp(workingDir);
    printf("CWD: %s\n", workingDir);
    char* cmd = new char[strlen(args[1]) + strlen("java -jar") + 2];
    sprintf(cmd, "java -jar %s", args[1]);
    printf("CMD: %s\n", cmd);
    chdir(workingDir);
    system(cmd);
    delete[] cmd;
    delete[] workingDir;

    return 0;
}