stage1.cpp

linux下的一款播放器

        fp = fopen(szFile, "w");
    }

    // we read it in 20 chunks so it's easy to get "."'s printed
    int nWriteSize = nArchiveSize / 20;
    for (int nPos = 0; nPos < nBytes; nPos += nArchiveSize / 20)
    {
        if(!(m_ulInstFlags & INST_SILENT))
        {
            printf(".");
            fflush(0);
        }
        if (nPos + nArchiveSize / 20 > nArchiveSize)
        {
            nWriteSize = nArchiveSize - nPos;
        }
        fwrite(pArchiveData + nPos, sizeof(char), nWriteSize, fp);
    }
    if (bUsePipe)
    {
        pclose(fp);
    }
    else
    {
        fclose(fp);
        if(!(m_ulInstFlags & INST_SILENT))
        {
            //printf ("\n(%s)\n", szCmd);
            printf ("\nDecompressing files... (please wait)\n");
        }
        system(szCmd);
    }

    if (nArchiveProgSize)
    {
        unlink(TMP_EXTRACT_PROG);
    }

    if(!(m_ulInstFlags & INST_SILENT))
    {
        printf("\n");
    }
    RunSecondStage(argc, argv); //only returns if second stage installer not found
    exit(nRet);
    return 0; //shut-up HP
}


/************************************************************************
 * Stage1::RunSecondStage - invoke the second-stage installer
 *
 * Note, does not return if successful. Second-stage installer
 * is responsible for all cleanup.
 */
void
Stage1::RunSecondStage(int argc, char* argv[])
{
    char szCmd[1024];
    struct stat info;
    char** newargv = new char* [argc + 1];
    memcpy (newargv, argv, (argc+1) * sizeof(char*));


    //printf("Checking for second stage installer...");
    fflush(0);

    if (chdir(DESTDIR) == 0)
    {
        //
        // check for install binary first
        //
        sprintf(szCmd, ".%s%s", PATH_SEP, SECOND_STAGE_PROG);
#ifdef _WIN32 //win32 not really supported yet...maybe someday
        strcat(szCmd, ".exe");
#endif
        if (stat(szCmd, &info) == 0)
        {
            chmod(szCmd, 0755);
            newargv[0] = szCmd;
            execvp(szCmd, newargv);
        }

        //
        // check for install scripts in various languages next
        //
        sprintf(szCmd, ".%s%s.sh", PATH_SEP, SECOND_STAGE_PROG);
        if (stat (szCmd, &info) == 0)
        {
            newargv[0] = szCmd;
            execvp("bash", newargv);
        }

        sprintf(szCmd, ".%s%s.pl", PATH_SEP, SECOND_STAGE_PROG);
        if (stat (szCmd, &info) == 0)
        {
            newargv[0] = szCmd;
            execvp("perl", newargv);
        }

        sprintf(szCmd, ".%s%s.py", PATH_SEP, SECOND_STAGE_PROG);
        if (stat (szCmd, &info) == 0)
        {
            newargv[0] = szCmd;
            execvp("python", newargv);
        }
    }

    delete[] newargv;

    if(!(m_ulInstFlags & INST_SILENT))
    {
        printf("Warning: second stage installer not found!\n");
        fflush(0);
    }
}
#endif // _CONSOLE


/************************************************************************
 * Stage1::Bail - print a message and exit
 */
void
Stage1::Bail (int nRet, const char* szMessage)
{
    if (!(m_ulInstFlags & INST_SILENT) && szMessage)
    {
        printf("%s", szMessage);
        fflush(0);
    }
    exit(nRet);
}


/************************************************************************
 * Stage1::PrintVersion - Print the version
 */
void
Stage1::PrintVersion(void)
{
    printf("%s\n", ProductInstaller::VersionBanner());
}


/************************************************************************
 * Stage1::PrintUsage - Print command-line usage information
 */
void
Stage1::PrintUsage(const char* szProg)
{
    fprintf(stderr, "\nUsage: %s [options]\n"
        "\nWhere options are:\n%s\n", szProg, 
        PackageInfo::CommandLineHelpString(m_szPassword ? TRUE : FALSE));
}


/************************************************************************
 * Stage1::ParseCmdLine - Parse the command-line options
 *
 * We pass our command-line options to the second-stage installer,
 * so most of them will be parsed by it.  We just grab -h and -v
 * here so we don't have to extract the archive before handling them.
 */
void
Stage1::ParseCmdLine(int argc, char* argv[])
{
    int i=0;
    char** arg=0;

    // strip off any path information
    g_szProg = argv[0] + strlen(argv[0]);
    while (g_szProg > argv[0] && *g_szProg != '/' && *g_szProg != '\\')
    {
        --g_szProg;
    }
    if (*g_szProg == '/' || *g_szProg == '\\')
    {
        ++g_szProg;
    }

    
    // First, scan all args for -v or -h; if there we want to exit now...
    for (i = argc, arg = argv; i; arg++, i--)
    {
        if (!strcmp(*arg, "--version") ||
            !strcmp(*arg, "-v"))
        {
            PrintVersion();
            Bail(-1,"");
        }
        if (!strcmp(*arg, "--help") ||
            !strcmp(*arg, "-h") ||
            !strcmp(*arg, "-?") ||
            !strcmp(*arg, "/?")) // for win32-heads
        {
            PrintVersion();
            PrintUsage();
            Bail(-1,"");
        }
    }

    for (i = argc, arg = argv; i; arg++, i--)
    {
        if(!strcmp(*arg, "--silent") ||
           !strcmp(*arg, "-s") ||
           !strcmp(*arg, "/s"))
        {
            m_ulInstFlags |= INST_SILENT | INST_NON_INTERACTIVE;
        }

        else if(!strcmp(*arg, "--progress-only") ||
                !strcmp(*arg, "-p"))
        {
            m_ulInstFlags |= INST_NON_INTERACTIVE;
        }

        else if(!strcmp(*arg, "--password"))
        {
            if(i > 1)
            {
                i--; 
                arg++;
                strncpy(m_szUserPass, *arg, MAX_PASS-1);
            }
        }
    }
    // any other args will be parsed by the second-stage installer
    // so ignore them

}

#ifdef _CONSOLE
void
Stage1::SetEchoOff(void)
{
    ioctl(0, TCGETS, &g_oldtty);
    struct termios tty = g_oldtty;
    tty.c_lflag &= ~(ICANON | ECHO | ECHOE | ECHOK | ECHONL);
    tty.c_cc[VMIN] = 1;
    tty.c_cc[VTIME] = 0;
    ioctl(0, TCSETS, &tty);
}

void
Stage1::SetEchoOn(void)
{
    ioctl(0, TCSETS, &g_oldtty);
}

BOOL
Stage1::PasswordPrompt(void)
{
    BOOL bMatch = FALSE;

    SetEchoOff();
    UINT8 i = 0;

    for(;;)
    {
        printf("Please enter the installation password: ");
        
        if(!fgets(m_szUserPass, MAX_PASS, stdin))
        {
            break;
        }

        // Trim the newline
        m_szUserPass[strlen(m_szUserPass) - 1] = '\0';
        if(strcmp(m_szUserPass, m_szPassword) == 0)
        {
            bMatch = TRUE;
            break;
        }

        if(++i < MAX_PASS_ATTEMPTS)
        {
            printf("\nThe password you entered is incorrect.\n");
            sleep(1);
        }
        else
        {
           printf("\nThe maximum number of installation attempts has "
                  "been exceeded.\n");
           break;
        }
    }

    printf("\n");
    SetEchoOn();
    return bMatch;
}
#endif // _CONSOLE