Contents of /trunk/mkinitrd-magellan/busybox/util-linux/fdformat.c
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Sat Sep 1 22:45:15 2007 UTC (17 years ago) by niro
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Sat Sep 1 22:45:15 2007 UTC (17 years ago) by niro
File MIME type: text/plain
File size: 3838 byte(s)
-import if magellan mkinitrd; it is a fork of redhats mkinitrd-5.0.8 with all magellan patches and features; deprecates magellan-src/mkinitrd
1 | /* vi: set sw=4 ts=4: */ |
2 | /* fdformat.c - Low-level formats a floppy disk - Werner Almesberger */ |
3 | |
4 | /* 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@pld.ORG.PL> |
5 | * - added Native Language Support |
6 | * 1999-03-20 Arnaldo Carvalho de Melo <acme@conectiva.com.br> |
7 | * - more i18n/nls translatable strings marked |
8 | * |
9 | * 5 July 2003 -- modified for Busybox by Erik Andersen |
10 | */ |
11 | |
12 | #include "busybox.h" |
13 | |
14 | |
15 | /* Stuff extracted from linux/fd.h */ |
16 | struct floppy_struct { |
17 | unsigned int size, /* nr of sectors total */ |
18 | sect, /* sectors per track */ |
19 | head, /* nr of heads */ |
20 | track, /* nr of tracks */ |
21 | stretch; /* !=0 means double track steps */ |
22 | #define FD_STRETCH 1 |
23 | #define FD_SWAPSIDES 2 |
24 | |
25 | unsigned char gap, /* gap1 size */ |
26 | |
27 | rate, /* data rate. |= 0x40 for perpendicular */ |
28 | #define FD_2M 0x4 |
29 | #define FD_SIZECODEMASK 0x38 |
30 | #define FD_SIZECODE(floppy) (((((floppy)->rate&FD_SIZECODEMASK)>> 3)+ 2) %8) |
31 | #define FD_SECTSIZE(floppy) ( (floppy)->rate & FD_2M ? \ |
32 | 512 : 128 << FD_SIZECODE(floppy) ) |
33 | #define FD_PERP 0x40 |
34 | |
35 | spec1, /* stepping rate, head unload time */ |
36 | fmt_gap; /* gap2 size */ |
37 | const char * name; /* used only for predefined formats */ |
38 | }; |
39 | struct format_descr { |
40 | unsigned int device,head,track; |
41 | }; |
42 | #define FDFMTBEG _IO(2,0x47) |
43 | #define FDFMTTRK _IOW(2,0x48, struct format_descr) |
44 | #define FDFMTEND _IO(2,0x49) |
45 | #define FDGETPRM _IOR(2, 0x04, struct floppy_struct) |
46 | #define FD_FILL_BYTE 0xF6 /* format fill byte. */ |
47 | |
48 | static void xioctl(int fd, int request, void *argp, const char *string) |
49 | { |
50 | if (ioctl(fd, request, argp) < 0) { |
51 | bb_perror_msg_and_die(string); |
52 | } |
53 | } |
54 | |
55 | int fdformat_main(int argc,char **argv) |
56 | { |
57 | int fd, n, cyl, read_bytes, verify; |
58 | unsigned char *data; |
59 | struct stat st; |
60 | struct floppy_struct param; |
61 | struct format_descr descr; |
62 | |
63 | if (argc < 2) { |
64 | bb_show_usage(); |
65 | } |
66 | verify = !getopt32(argc, argv, "n"); |
67 | argv += optind; |
68 | |
69 | xstat(*argv, &st); |
70 | if (!S_ISBLK(st.st_mode)) { |
71 | bb_error_msg_and_die("%s: not a block device", *argv); |
72 | /* do not test major - perhaps this was an USB floppy */ |
73 | } |
74 | |
75 | /* O_RDWR for formatting and verifying */ |
76 | fd = xopen(*argv, O_RDWR); |
77 | |
78 | /* original message was: "Could not determine current format type" */ |
79 | xioctl(fd, FDGETPRM, ¶m, "FDGETPRM"); |
80 | |
81 | printf("%s-sided, %d tracks, %d sec/track. Total capacity %d kB\n", |
82 | (param.head == 2) ? "Double" : "Single", |
83 | param.track, param.sect, param.size >> 1); |
84 | |
85 | /* FORMAT */ |
86 | printf("Formatting... "); |
87 | xioctl(fd, FDFMTBEG, NULL, "FDFMTBEG"); |
88 | |
89 | /* n == track */ |
90 | for (n = 0; n < param.track; n++) { |
91 | descr.head = 0; |
92 | descr.track = n; |
93 | xioctl(fd, FDFMTTRK, &descr, "FDFMTTRK"); |
94 | printf("%3d\b\b\b", n); |
95 | if (param.head == 2) { |
96 | descr.head = 1; |
97 | xioctl(fd, FDFMTTRK, &descr, "FDFMTTRK"); |
98 | } |
99 | } |
100 | |
101 | xioctl(fd, FDFMTEND, NULL, "FDFMTEND"); |
102 | printf("done\n"); |
103 | |
104 | /* VERIFY */ |
105 | if (verify) { |
106 | /* n == cyl_size */ |
107 | n = param.sect*param.head*512; |
108 | |
109 | data = xmalloc(n); |
110 | printf("Verifying... "); |
111 | for (cyl = 0; cyl < param.track; cyl++) { |
112 | printf("%3d\b\b\b", cyl); |
113 | read_bytes = safe_read(fd, data, n); |
114 | if (read_bytes != n) { |
115 | if (read_bytes < 0) { |
116 | bb_perror_msg(bb_msg_read_error); |
117 | } |
118 | bb_error_msg_and_die("problem reading cylinder %d, " |
119 | "expected %d, read %d", cyl, n, read_bytes); |
120 | // FIXME: maybe better seek & continue?? |
121 | } |
122 | /* Check backwards so we don't need a counter */ |
123 | while (--read_bytes >= 0) { |
124 | if (data[read_bytes] != FD_FILL_BYTE) { |
125 | printf("bad data in cyl %d\nContinuing... ",cyl); |
126 | } |
127 | } |
128 | } |
129 | /* There is no point in freeing blocks at the end of a program, because |
130 | all of the program's space is given back to the system when the process |
131 | terminates.*/ |
132 | |
133 | if (ENABLE_FEATURE_CLEAN_UP) free(data); |
134 | |
135 | printf("done\n"); |
136 | } |
137 | |
138 | if (ENABLE_FEATURE_CLEAN_UP) close(fd); |
139 | |
140 | /* Don't bother closing. Exit does |
141 | * that, so we can save a few bytes */ |
142 | return EXIT_SUCCESS; |
143 | } |