Here it is...

/*
 * PSF4CFG.C
 *
 *  Copyright (C) 1995 J.A. Keuter. All Rights Reserved.
 * 
 * CONTAINS: All the code for the Print Screen FormFeeder Version 4.03
 *           configuration utility
 * 
 * USES: The standard, standard I/O, file control, DOS and string libraries.
 *
 * IMPLEMENTATION DETAILS:
 *
 *  First the commandline parameters are parsed. If there's an invalid
 *  parameter found the parsing is stopped and an error banner is printed
 *  indicating the location of the error.
 *
 *  The parameter '/?' or '/H' (help) fills the banner with available
 *  parameters and displays it.
 *
 *  The device driver can be opened by its name. If it's installed a
 *  positive handle is returned, otherwise a negative error code is
 *  returned. On error a banner is printed.
 *
 *  The device driver reacts to opening by reinstalling itself on INT 05h,
 *  the Print Screen interrupt, and resetting it's receive buffer.
 *
 *  If the parameter '/NU' (NoUser) was omitted the value of the environment
 *  variable SGUSER is requested. It's concatenated to the command byte (1h)
 *  +'User: ' string and written to the device. The command byte was added
 *  to avoid accidental device access. On error a banner is printed. If the
 *  parameter '/NU' was found the command byte and an empty string is
 *  written, effectively wipping the user name.
 *
 *  If the parameter '/LPT?' (set LPT?) was specified the value ?, which
 *  ranges from 1 to 3, is concatenated to the command byte (2h) and written
 *  to the device. On error a banner is printed.
 *
 *  If the parameter '/Q' (Quiet) was omitted a banner is printed to tell the
 *  user that the driver reinstalled itself to INT 05h, to what value the
 *  user name has been set and to what printer port the Print Screen will
 *  be send. The last two only if applicable.
 *
 * MODIFICATIONS
 *
 *  February 5, 1995    4.00 : J.A. Keuter
 *   Created. Version number sync'ed with device driver.
 *
 *  February 9, 1995    4.01 : J.A. Keuter
 *   Added /Q switch for quiet operation. Added /NU switch to clear
 *   username and ignore environment variable SGUSER.
 *
 *  June 6, 1995        4.02 : J.A. Keuter
 *   Added write() check, error level and banner.
 *
 *  June 20, 1995       4.03 : J.A. Keuter
 *   Added printer port selection code.
 */

#include 
#include 
#include 
#include 
#include 

#define BOOL(x) (!(!x))
#define FALSE 0
#define TRUE !(FALSE)
typedef unsigned char BOOL;


char pcBanner[] =
"\n ÕÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ͸"
"\n ³  Print Screen FormFeeder Configuration  ³"
"\n ³                                         ³"
"\n ³                                         ³"
"\n ³                                         ³"
"\n ³   Ver 4.03   (C) 1995  by J.A. Keuter   ³"
"\n ÔÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ;"
"\n";


int main(int nArgc, char *ppcArgv[])
{
  int hDevice;
  char *pcUser;
  char *pcCommand1 = "\001                           ";
  char *pcCommand2 = "\002 ";
  union REGS CPUregs;

  int nArgCount;
  int nArgError = 0;
  BOOL fQuiet = FALSE;
  BOOL fNoUser = FALSE;
  BOOL fPortSet = FALSE;
  BOOL fHelp = FALSE;

  for (nArgCount = 1; (nArgCount < nArgc) && (nArgError == 0); nArgCount++) {
    if ((ppcArgv[nArgCount][0] != '/') && (ppcArgv[nArgc][0] != '-')) {
      nArgError = nArgCount;
      break;
    }

    if ((toupper(ppcArgv[nArgCount][1]) == 'Q') &&
      (ppcArgv[nArgCount][2] == '\0')) {
      fQuiet = TRUE;
      continue;
    }

    if ((toupper(ppcArgv[nArgCount][1]) == 'N') &&
      (toupper(ppcArgv[nArgCount][2]) == 'U') &&
      ((ppcArgv[nArgCount][3]) == '\0')) {
      fNoUser = TRUE;
      continue;
    }

    if ((toupper(ppcArgv[nArgCount][1]) == 'L') &&
      (toupper(ppcArgv[nArgCount][2]) == 'P') &&
      (toupper(ppcArgv[nArgCount][3]) == 'T') &&
      ((ppcArgv[nArgCount][5]) == '\0')) {

      if ((ppcArgv[nArgCount][4] > '0') && (ppcArgv[nArgCount][4] < '4')) {
         pcCommand2[1] = ppcArgv[nArgCount][4];
         fPortSet = TRUE;
         continue;
      }
    }

    if (((ppcArgv[nArgCount][1] == '?') ||
      (toupper(ppcArgv[nArgCount][1] == 'H'))) &&
      (ppcArgv[nArgCount][2] == '\0')) {
      fHelp = TRUE;
      continue;
    }

    nArgError = nArgCount;
  }

  if (nArgError) {
    sprintf(&pcBanner[92],
      "³   ! Invalid parameter at position %-2.d!   ³", nArgCount-1);
    pcBanner[135] = '\n';
    printf("%s\007", pcBanner);
    return 1;
  }

  if (fHelp) {
    sprintf(&pcBanner[92], "³ /NU   : Set no user name/clear user name³");
    pcBanner[135] = '\n';
    sprintf(&pcBanner[137], "³ /LPT? : Set printer port [1-3]          ³");
    pcBanner[180] = '\n';
    sprintf(&pcBanner[182], "³ /Q    : No banner                       ³");
    pcBanner[225] = '\n';

    printf("%s", pcBanner);
    return 0;
  }

  if ((hDevice = open("PRTSCFF$", O_WRONLY)) > 0) {
    strcpy(&pcBanner[92], "³ Device driver reinstalled on PrtSc INT  ³");
    pcBanner[135] = '\n';
  } else {
    strcpy(&pcBanner[92], "³     ! Device driver not installed !     ³");
    pcBanner[135] = '\n';
    printf("%s\007", pcBanner);
    return 2;
  }

  if (!fNoUser) {
    if (!(pcUser = getenv("SGUSER"))) {
      strcpy(&pcBanner[137], "³ ! No SGUSER environment variable set !  ³");
      pcBanner[180] = '\n';
      printf("%s\007", pcBanner);
      close(hDevice);
      return 3;
    }

    sprintf(&pcCommand1[1], "User: %-20.20s", pcUser);

    sprintf(&pcBanner[137], "³ Stored user name: %-20.20s  ³", pcUser);
    pcBanner[180] = '\n';
  }

  if (write(hDevice, pcCommand1, strlen(pcCommand1)+1) != strlen(pcCommand1)+1) {
    if (fNoUser)
      sprintf(&pcBanner[137], "³       ! Error clearing user name !      ³");
    else
      sprintf(&pcBanner[137], "³       ! Error storing user name !       ³");
    pcBanner[180] = '\n';
    printf("%s\007", pcBanner);
    close(hDevice);
    return 4;
  }

  if (fPortSet) {
    if (write(hDevice, pcCommand2, strlen(pcCommand2)+1) != strlen(pcCommand2)+1) {
      sprintf(&pcBanner[182], "³     ! Error setting printer port !      ³");
      pcBanner[225] = '\n';
      printf("%s\007", pcBanner);
      close(hDevice);
      return 5;
    }

    sprintf(&pcBanner[182], "³ Print Screen send to printer port LPT   ³");
    pcBanner[221] = pcCommand2[1];
    pcBanner[225] = '\n';
  }

  if (!fQuiet)
    printf("%s", pcBanner);

  close(hDevice);

  return 0;
}

/* end of file */

Written by my own two hands and an ASCII editor. Problems? write me Last updated May 21, 1997

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