/* "Automagically" repair RMS file attributes of a BACKUP SAVESET
 * (typically used after transfer via FTP in BINARY mode)
 *
 * Usage:  $ mcr [dir]FIX_SAVESET  file.bck
 */

/*
 * Changes from original version:
 * wjm 25-mar-1991: fixed dimension of "buffer"
 * wjm 10-may-1991: add "ctx=stm"
 * wjm 31-jan-1993: add some header files & declarations,
 *			replace 'exit()' by 'exit(4)'
 */
/*
 * (Originally) From:         Bill Bame <bill.ab.umd.edu!bill@UMD5.UMD.EDU>
 *
 * Author : William P. Bame (September 1990)
 * Purpose: Change the file attributes of a saveset so that VMS BACKUP can
 *          read it again.  Especially useful when transferring save sets via
 *          some non-DEC protocol (ftp, uucp, etc.).
 * Notes  : Tested with VMS 5.1-1 through 5.4-1A
 *
 * Disclaimer:  As usual, use at your own risk.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

unsigned int SYS$OPEN(),SYS$CLOSE(),SYS$MODIFY();

#include <unixio.h>
#include <file.h>
#include <fab.h>
#define RME$C_SETRFM 0x00000001
 
main(argc,argv)
int argc;
char **argv;
{
  int fd,buffer[11],status;
  struct FAB myfab = cc$rms_fab;
 
  if (argc >= 2) {
    if ((fd = open(*++argv,O_RDONLY,0,"ctx=stm")) <= 0) {
      perror("open");
      exit(4);
    }
    else {
      if ((read(fd,buffer,44)) < 0) {
        perror("read");
        exit(4);
      }
    }
    close(fd);
    printf("Blocksize = %d",buffer[10]);
    myfab.fab$b_fac = FAB$M_PUT;
    myfab.fab$l_fop |= FAB$M_ESC;
    myfab.fab$l_ctx |= RME$C_SETRFM;
    myfab.fab$l_fna = *argv;
    myfab.fab$b_fns = strlen(*argv);
    if (((status = SYS$OPEN(&myfab, 0, 0)) & 7) != 1)
        exit((printf("Couldn't open %s\n", *argv), status));
    myfab.fab$b_org = FAB$C_SEQ;
    myfab.fab$b_rfm = FAB$C_FIX;
    myfab.fab$w_mrs = buffer[10];
    if (((status = SYS$MODIFY(&myfab, 0, 0)) & 7) != 1)
        exit((printf("Couldn't modify %s\n", *argv), status));
    if (((status = SYS$CLOSE(&myfab, 0, 0)) & 7) != 1)
        exit((printf("Couldn't close %s\n", *argv), status));
  }
  else {
    printf("usage: fix_saveset <filename>\n");
    exit(1);
  }
}