Converting .tap files to real tapes

I've hacked together a 2.11 BSD C program (nothing special, should work on other *nixen) that takes a .tap tape file and spits it onto a real tape. I've tested it with both a TK50 and a TS05 tape drive. It even successfully wrote a bootable TK50 format XXDP 2.5 tape. I'm going to be cleaning up the code and posting it on the web, but for those who can't wait, here is the raw code. It is left as an exercise to the reader to figure out where my MUA breaks the source code lines. ------------ Cut Here -------------------- /* detap.c - 2003 by Christopher L McNabb */ #include <stdio.h> #include <strings.h> #include <stdlib.h> #include <fcntl.h> #include <sys/file.h> #include <sys/inode.h> #include <sys/ioctl.h> #include <sys/mtio.h> main(argc, argv) int argc; char *argv[]; { int infile,outfile,ctr; long int offset; long int records=1; long int filecnt=1; long int reclen; long int reclen2; void* buffer; struct mtop tapeeof,taperew; ctr = 0; taperew.mt_op = MTREW; taperew.mt_count = 1; tapeeof.mt_op = MTWEOF; tapeeof.mt_count = 1; if(argc < 3) { printf("Usage: %s infile outdev\n",argv[0]); exit(-1); } infile=open(argv[1],O_RDONLY); if(infile < 0) { printf("Could not open %s\n",argv[1]); exit(-1); } outfile=open(argv[2],O_CREAT | O_RDWR | O_TRUNC,IREAD | IWRITE); if(outfile < 0) { printf("Could not open %s\n",argv[2]); exit(-1); } printf("Rewinding Tape\n"); if( 0 > ioctl(outfile,MTIOCTOP,&taperew)) { printf("\nMTIOCOP REW ERROR\n"); exit(-1); } offset = 0; read(infile,&reclen,4); while(1) { ctr ++; if(reclen == 0) { filecnt++; if(0 > ioctl(outfile,MTIOCTOP,&tapeeof)) { printf("\nMTIOCTOP EOF ERR\n"); exit(-1); } read(infile,&reclen,4); if(reclen == 0) { printf("\nEnd of Tape\n"); close(outfile); ioctl(outfile,MTIOCTOP,&taperew); break; } records=1; continue; } buffer = malloc(reclen); read(infile,buffer,reclen); read(infile,&reclen2,4); if(reclen != reclen2) { lseek(infile,-3,L_INCR); read(infile,&reclen2,4); if(reclen != reclen2) { printf("\nHdr1 and Hdr2 do not match\n"); exit(-1); } } write(outfile,buffer,reclen); fprintf(stdout,"Total Records: %6d File: %6ld Record: %6ld Record Length: %6u\r",ctr,filecnt,records,reclen); fflush(stdout); free(buffer); records++; read(infile,&reclen,4); } close(infile); close(outfile); } ------------------- SNIP --------------------------