source: trunk/mindi-busybox/util-linux/fdformat.c @ 956

Last change on this file since 956 was 821, checked in by bruno, 13 years ago

Addition of busybox 1.2.1 as a mindi-busybox new package
This should avoid delivering binary files in mindi not built there (Fedora and Debian are quite serious about that)

File size: 4.2 KB
Line 
1/* fdformat.c  -  Low-level formats a floppy disk - Werner Almesberger */
2
3/* 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@pld.ORG.PL>
4 * - added Native Language Support
5 * 1999-03-20 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
6 * - more i18n/nls translatable strings marked
7 *
8 * 5 July 2003 -- modified for Busybox by Erik Andersen
9 */
10
11#include <stdio.h>
12#include <string.h>
13#include <fcntl.h>
14#include <errno.h>
15#include <unistd.h>
16#include <stdlib.h>
17#include <sys/stat.h>
18#include <sys/ioctl.h>
19#include "busybox.h"
20
21
22/* Stuff extracted from linux/fd.h */
23struct floppy_struct {
24    unsigned int    size,       /* nr of sectors total */
25            sect,       /* sectors per track */
26            head,       /* nr of heads */
27            track,      /* nr of tracks */
28            stretch;    /* !=0 means double track steps */
29#define FD_STRETCH 1
30#define FD_SWAPSIDES 2
31
32    unsigned char   gap,        /* gap1 size */
33
34            rate,       /* data rate. |= 0x40 for perpendicular */
35#define FD_2M 0x4
36#define FD_SIZECODEMASK 0x38
37#define FD_SIZECODE(floppy) (((((floppy)->rate&FD_SIZECODEMASK)>> 3)+ 2) %8)
38#define FD_SECTSIZE(floppy) ( (floppy)->rate & FD_2M ? \
39                 512 : 128 << FD_SIZECODE(floppy) )
40#define FD_PERP 0x40
41
42            spec1,      /* stepping rate, head unload time */
43            fmt_gap;    /* gap2 size */
44    const char  * name; /* used only for predefined formats */
45};
46struct format_descr {
47    unsigned int device,head,track;
48};
49#define FDFMTBEG _IO(2,0x47)
50#define FDFMTTRK _IOW(2,0x48, struct format_descr)
51#define FDFMTEND _IO(2,0x49)
52#define FDGETPRM _IOR(2, 0x04, struct floppy_struct)
53#define FD_FILL_BYTE 0xF6 /* format fill byte. */
54
55static void print_and_flush(const char * __restrict format, ...)
56{
57    va_list arg;
58
59    va_start(arg, format);
60    bb_vfprintf(stdout, format, arg);
61    va_end(arg);
62    bb_xfflush_stdout();
63}
64
65static void bb_xioctl(int fd, int request, void *argp, const char *string)
66{
67    if (ioctl (fd, request, argp) < 0) {
68        bb_perror_msg_and_die(string);
69    }
70}
71
72int fdformat_main(int argc,char **argv)
73{
74    int fd, n, cyl, read_bytes, verify;
75    unsigned char *data;
76    struct stat st;
77    struct floppy_struct param;
78    struct format_descr descr;
79
80    if (argc < 2) {
81        bb_show_usage();
82    }
83    verify = !bb_getopt_ulflags(argc, argv, "n");
84    argv += optind;
85
86    /* R_OK is needed for verifying */
87    if (stat(*argv,&st) < 0 || access(*argv,W_OK | R_OK ) < 0) {
88        bb_perror_msg_and_die("%s",*argv);
89    }
90    if (!S_ISBLK(st.st_mode)) {
91        bb_error_msg_and_die("%s: not a block device",*argv);
92        /* do not test major - perhaps this was an USB floppy */
93    }
94
95
96    /* O_RDWR for formatting and verifying */
97    fd = bb_xopen(*argv,O_RDWR );
98
99    bb_xioctl(fd, FDGETPRM, &param, "FDGETPRM");/*original message was: "Could not determine current format type" */
100
101    print_and_flush("%s-sided, %d tracks, %d sec/track. Total capacity %d kB.\n",
102        (param.head == 2) ? "Double" : "Single",
103        param.track, param.sect, param.size >> 1);
104
105    /* FORMAT */
106    print_and_flush("Formatting ... ", NULL);
107    bb_xioctl(fd, FDFMTBEG,NULL,"FDFMTBEG");
108
109    /* n == track */
110    for (n = 0; n < param.track; n++)
111    {
112        descr.head = 0;
113        descr.track = n;
114        bb_xioctl(fd, FDFMTTRK,&descr,"FDFMTTRK");
115        print_and_flush("%3d\b\b\b", n);
116        if (param.head == 2) {
117        descr.head = 1;
118        bb_xioctl(fd, FDFMTTRK,&descr,"FDFMTTRK");
119        }
120    }
121
122    bb_xioctl(fd,FDFMTEND,NULL,"FDFMTEND");
123    print_and_flush("done\n", NULL);
124
125    /* VERIFY */
126    if(verify) {
127        /* n == cyl_size */
128        n = param.sect*param.head*512;
129
130        data = xmalloc(n);
131        print_and_flush("Verifying ... ", NULL);
132        for (cyl = 0; cyl < param.track; cyl++) {
133            print_and_flush("%3d\b\b\b", cyl);
134            if((read_bytes = safe_read(fd,data,n))!= n ) {
135                if(read_bytes < 0) {
136                    bb_perror_msg(bb_msg_read_error);
137                }
138                bb_error_msg_and_die("Problem reading cylinder %d, expected %d, read %d", cyl, n, read_bytes);
139            }
140            /* Check backwards so we don't need a counter */
141            while(--read_bytes>=0) {
142                if( data[read_bytes] != FD_FILL_BYTE) {
143                     print_and_flush("bad data in cyl %d\nContinuing ... ",cyl);
144                }
145            }
146        }
147        /* There is no point in freeing blocks at the end of a program, because
148        all of the program's space is given back to the system when the process
149        terminates.*/
150
151        if (ENABLE_FEATURE_CLEAN_UP) free(data);
152
153        print_and_flush("done\n", NULL);
154    }
155
156    if (ENABLE_FEATURE_CLEAN_UP) close(fd);
157
158    /* Don't bother closing.  Exit does
159     * that, so we can save a few bytes */
160    return EXIT_SUCCESS;
161}
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