101 lines
2.3 KiB
C
101 lines
2.3 KiB
C
/* fdformat.c - Low-level formats a floppy disk. */
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#include <stdio.h>
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#include <string.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <linux/fd.h>
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static int ctrl;
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struct floppy_struct param;
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#define SECTOR_SIZE 512
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#define PERROR(msg) { perror(msg); exit(1); }
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static void format_disk(char *name)
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{
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struct format_descr descr;
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int track;
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char dummy;
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printf("Formatting ... ");
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fflush(stdout);
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if (ioctl(ctrl,FDFMTBEG,NULL) < 0) PERROR("\nioctl(FDFMTBEG)");
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for (track = 0; track < param.track; track++) {
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descr.track = track;
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descr.head = 0;
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if (ioctl(ctrl,FDFMTTRK,(int) &descr) < 0) PERROR("\nioctl(FDFMTTRK)");
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printf("%3d\b\b\b",track);
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fflush(stdout);
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if (param.head == 2) {
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descr.head = 1;
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if (ioctl(ctrl,FDFMTTRK,(int) &descr) < 0)
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PERROR("\nioctl(FDFMTTRK)");
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}
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}
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if (ioctl(ctrl,FDFMTEND,NULL) < 0) PERROR("\nioctl(FDFMTEND)");
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printf("done\n");
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}
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static void verify_disk(char *name)
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{
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unsigned char *data;
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int fd,cyl_size,cyl,count;
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cyl_size = param.sect*param.head*512;
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if ((data = (unsigned char *) malloc(cyl_size)) == NULL) PERROR("malloc");
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printf("Verifying ... ");
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fflush(stdout);
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if ((fd = open(name,O_RDONLY)) < 0) PERROR(name);
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for (cyl = 0; cyl < param.track; cyl++) {
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printf("%3d\b\b\b",cyl);
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fflush(stdout);
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if (read(fd,data,cyl_size) != cyl_size) PERROR("read");
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for (count = 0; count < cyl_size; count++)
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if (data[count] != FD_FILL_BYTE) {
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printf("bad data in cyl %d\nContinuing ... ",cyl);
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fflush(stdout);
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break;
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}
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}
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printf("done\n");
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if (close(fd) < 0) PERROR("close");
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}
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static void usage(char *name)
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{
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char *this;
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if (this = strrchr(name,'/')) name = this+1;
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fprintf(stderr,"usage: %s [ -n ] device\n",name);
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exit(1);
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}
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main(int argc,char **argv)
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{
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int verify;
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char *name;
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name = argv[0];
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verify = 1;
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if (argc > 1 && argv[1][0] == '-') {
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if (argv[1][1] != 'n') usage(name);
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verify = 0;
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argc--;
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argv++;
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}
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if (argc != 2) usage(name);
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if ((ctrl = open(argv[1],3)) < 0) PERROR(argv[1]);
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if (ioctl(ctrl,FDGETPRM,(int) ¶m) < 0) PERROR("ioctl(FDGETPRM)");
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printf("%sle-sided, %d tracks, %d sec/track. Total capacity %d kB.\n",
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param.head ? "Doub" : "Sing",param.track,param.sect,param.size >> 1);
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format_disk(argv[1]);
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if (verify) verify_disk(argv[1]);
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}
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