Add the fdformat utility, based on a patch from Kent Robotti,

but I then completely reworked the fdformat utility to comply
with the current busybox way of doing things.

1 files changed, 158 insertions, 0 deletions

diff --git a/util-linux/fdformat.c b/util-linux/fdformat.c
new file mode 100644
index 000000000..5b926467f
--- /dev/null
+++ b/util-linux/fdformat.c
@@ -0,0 +1,158 @@
+/* fdformat.c  -  Low-level formats a floppy disk - Werner Almesberger */
+
+/* 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@pld.ORG.PL>
+ * - added Native Language Support
+ * 1999-03-20 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ * - more i18n/nls translatable strings marked
+ *
+ * 5 July 2003 -- modified for Busybox by Erik Andersen
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include "busybox.h"
+
+
+/* Stuff extracted from linux/fd.h */
+struct floppy_struct {
+        unsigned int    size,           /* nr of sectors total */
+                        sect,           /* sectors per track */
+                        head,           /* nr of heads */
+                        track,          /* nr of tracks */
+                        stretch;        /* !=0 means double track steps */
+#define FD_STRETCH 1
+#define FD_SWAPSIDES 2
+
+        unsigned char   gap,            /* gap1 size */
+
+                        rate,           /* data rate. |= 0x40 for perpendicular */
+#define FD_2M 0x4
+#define FD_SIZECODEMASK 0x38
+#define FD_SIZECODE(floppy) (((((floppy)->rate&FD_SIZECODEMASK)>> 3)+ 2) %8)
+#define FD_SECTSIZE(floppy) ( (floppy)->rate & FD_2M ? \
+                             512 : 128 << FD_SIZECODE(floppy) )
+#define FD_PERP 0x40
+
+                        spec1,          /* stepping rate, head unload time */
+                        fmt_gap;        /* gap2 size */
+        const char      * name; /* used only for predefined formats */
+};
+struct format_descr {
+        unsigned int device,head,track;
+};
+#define FDFMTBEG _IO(2,0x47)
+#define FDFMTTRK _IOW(2,0x48, struct format_descr)
+#define FDFMTEND _IO(2,0x49)
+#define FDGETPRM _IOR(2, 0x04, struct floppy_struct)
+#define FD_FILL_BYTE 0xF6 /* format fill byte. */
+
+
+
+static void format_disk(int ctrl, char *name, struct floppy_struct *param)
+{
+    struct format_descr descr;
+    int track;
+
+    printf("Formatting ... ");
+    fflush(stdout);
+    if (ioctl(ctrl,FDFMTBEG,NULL) < 0) {
+        bb_perror_msg_and_die("FDFMTBEG");
+    }
+    for (track = 0; track < param->track; track++) 
+    {
+        descr.track = track;
+        descr.head = 0;
+        if (ioctl(ctrl,FDFMTTRK,(long) &descr) < 0) {
+            bb_perror_msg_and_die("FDFMTTRK");
+        }
+
+        printf("%3d\b\b\b",track);
+        fflush(stdout);
+        if (param->head == 2) {
+            descr.head = 1;
+            if (ioctl(ctrl,FDFMTTRK,(long) &descr) < 0) {
+                bb_perror_msg_and_die("FDFMTTRK");
+            }
+        }
+    }
+    if (ioctl(ctrl,FDFMTEND,NULL) < 0) {
+        bb_perror_msg_and_die("FDFMTEND");
+    }
+    printf("done\n");
+}
+
+static void verify_disk(char *name, struct floppy_struct *param)
+{
+    unsigned char *data;
+    int fd,cyl_size,cyl,count,read_bytes;
+
+    cyl_size = param->sect*param->head*512;
+    data = xmalloc(cyl_size);
+    printf("Verifying ... ");
+    fflush(stdout);
+    fd = bb_xopen(name,O_RDONLY);
+    for (cyl = 0; cyl < param->track; cyl++) 
+    {
+        printf("%3d\b\b\b",cyl);
+        fflush(stdout);
+        read_bytes = safe_read(fd,data,cyl_size);
+        if(read_bytes != cyl_size) {
+            if(read_bytes < 0) {
+                bb_perror_msg("Read: ");
+            }
+            bb_error_msg_and_die("Problem reading cylinder %d, "
+                    "expected %d, read %d", cyl, cyl_size, read_bytes);
+        }
+        for (count = 0; count < cyl_size; count++)
+            if (data[count] != FD_FILL_BYTE) {
+                printf("bad data in cyl %d\nContinuing ... ",cyl);
+                fflush(stdout);
+                break;
+            }
+    }
+    printf("done\n");
+    close(fd);
+}
+
+int fdformat_main(int argc,char **argv)
+{
+    int ctrl;
+    int verify;
+    struct stat st;
+    struct floppy_struct param;
+
+    if (argc < 2) {
+        bb_show_usage();
+    }
+    verify != bb_getopt_ulflags(argc, argv, "n");
+    argv += optind;
+
+    if (stat(*argv,&st) < 0 || access(*argv,W_OK) < 0) {
+        bb_perror_msg_and_die(*argv);
+    }
+    if (!S_ISBLK(st.st_mode)) {
+        bb_error_msg_and_die("%s: not a block device",*argv);
+        /* do not test major - perhaps this was an USB floppy */
+    }
+
+    ctrl = bb_xopen(*argv,O_WRONLY);
+    if (ioctl(ctrl,FDGETPRM,(long) &param) < 0) { 
+        bb_perror_msg_and_die("Could not determine current format type");
+    }
+    printf("%s-sided, %d tracks, %d sec/track. Total capacity %d kB.\n",
+            (param.head == 2) ? "Double" : "Single",
+            param.track, param.sect,param.size >> 1);
+    format_disk(ctrl, *argv, &param);
+    close(ctrl);
+
+    if (verify) {
+        verify_disk(*argv, &param);
+    }
+    return EXIT_SUCCESS;
+}