Contents of /tags/mkinitrd-6_3_0/busybox/miscutils/flashcp.c
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Thu Aug 19 10:14:02 2010 UTC (14 years, 1 month ago) by niro
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File size: 3746 byte(s)
Thu Aug 19 10:14:02 2010 UTC (14 years, 1 month ago) by niro
File MIME type: text/plain
File size: 3746 byte(s)
tagged 'mkinitrd-6_3_0'
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * busybox reimplementation of flashcp |
4 | * |
5 | * (C) 2009 Stefan Seyfried <seife@sphairon.com> |
6 | * |
7 | * Licensed under GPLv2, see file LICENSE in this tarball for details. |
8 | */ |
9 | |
10 | #include "libbb.h" |
11 | #include <mtd/mtd-user.h> |
12 | |
13 | #define MTD_DEBUG 0 |
14 | |
15 | #define OPT_v (1 << 0) |
16 | |
17 | #define BUFSIZE (8 * 1024) |
18 | |
19 | static void progress(int mode, uoff_t count, uoff_t total) |
20 | { |
21 | uoff_t percent; |
22 | |
23 | if (!option_mask32) //if (!(option_mask32 & OPT_v)) |
24 | return; |
25 | percent = count * 100; |
26 | if (total) |
27 | percent = (unsigned) (percent / total); |
28 | printf("\r%s: %"OFF_FMT"u/%"OFF_FMT"u (%u%%) ", |
29 | (mode == 0) ? "Erasing block" : ((mode == 1) ? "Writing kb" : "Verifying kb"), |
30 | count, total, (unsigned)percent); |
31 | fflush_all(); |
32 | } |
33 | |
34 | static void progress_newline(void) |
35 | { |
36 | if (!option_mask32) //if (!(option_mask32 & OPT_v)) |
37 | return; |
38 | bb_putchar('\n'); |
39 | } |
40 | |
41 | int flashcp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
42 | int flashcp_main(int argc UNUSED_PARAM, char **argv) |
43 | { |
44 | int fd_f, fd_d; /* input file and mtd device file descriptors */ |
45 | int i; |
46 | uoff_t erase_count; |
47 | unsigned opts; |
48 | struct mtd_info_user mtd; |
49 | struct erase_info_user e; |
50 | struct stat statb; |
51 | // const char *filename, *devicename; |
52 | RESERVE_CONFIG_UBUFFER(buf, BUFSIZE); |
53 | RESERVE_CONFIG_UBUFFER(buf2, BUFSIZE); |
54 | |
55 | opt_complementary = "=2"; /* exactly 2 non-option args: file, dev */ |
56 | opts = getopt32(argv, "v"); |
57 | argv += optind; |
58 | // filename = *argv++; |
59 | // devicename = *argv; |
60 | #define filename argv[0] |
61 | #define devicename argv[1] |
62 | |
63 | /* open input file and mtd device and do sanity checks */ |
64 | fd_f = xopen(filename, O_RDONLY); |
65 | fstat(fd_f, &statb); |
66 | fd_d = xopen(devicename, O_SYNC | O_RDWR); |
67 | #if !MTD_DEBUG |
68 | if (ioctl(fd_d, MEMGETINFO, &mtd) < 0) { |
69 | bb_error_msg_and_die("%s is not a MTD flash device", devicename); |
70 | } |
71 | if (statb.st_size > mtd.size) { |
72 | bb_error_msg_and_die("%s bigger than %s", filename, devicename); |
73 | } |
74 | #else |
75 | mtd.erasesize = 64 * 1024; |
76 | #endif |
77 | |
78 | /* always erase a complete block */ |
79 | erase_count = (uoff_t)(statb.st_size + mtd.erasesize - 1) / mtd.erasesize; |
80 | /* erase 1 block at a time to be able to give verbose output */ |
81 | e.length = mtd.erasesize; |
82 | #if 0 |
83 | /* (1) bloat |
84 | * (2) will it work for multi-gigabyte devices? |
85 | * (3) worse wrt error detection granularity |
86 | */ |
87 | /* optimization: if not verbose, erase in one go */ |
88 | if (!opts) { // if (!(opts & OPT_v)) |
89 | e.length = mtd.erasesize * erase_count; |
90 | erase_count = 1; |
91 | } |
92 | #endif |
93 | e.start = 0; |
94 | for (i = 1; i <= erase_count; i++) { |
95 | progress(0, i, erase_count); |
96 | errno = 0; |
97 | #if !MTD_DEBUG |
98 | if (ioctl(fd_d, MEMERASE, &e) < 0) { |
99 | bb_perror_msg_and_die("erase error at 0x%llx on %s", |
100 | (long long)e.start, devicename); |
101 | } |
102 | #else |
103 | usleep(100*1000); |
104 | #endif |
105 | e.start += mtd.erasesize; |
106 | } |
107 | progress_newline(); |
108 | |
109 | /* doing this outer loop gives significantly smaller code |
110 | * than doing two separate loops for writing and verifying */ |
111 | for (i = 1; i <= 2; i++) { |
112 | uoff_t done; |
113 | unsigned count; |
114 | |
115 | xlseek(fd_f, 0, SEEK_SET); |
116 | xlseek(fd_d, 0, SEEK_SET); |
117 | done = 0; |
118 | count = BUFSIZE; |
119 | while (1) { |
120 | uoff_t rem = statb.st_size - done; |
121 | if (rem == 0) |
122 | break; |
123 | if (rem < BUFSIZE) |
124 | count = rem; |
125 | progress(i, done / 1024, (uoff_t)statb.st_size / 1024); |
126 | xread(fd_f, buf, count); |
127 | if (i == 1) { |
128 | int ret; |
129 | errno = 0; |
130 | ret = full_write(fd_d, buf, count); |
131 | if (ret != count) { |
132 | bb_perror_msg_and_die("write error at 0x%"OFF_FMT"x on %s, " |
133 | "write returned %d", |
134 | done, devicename, ret); |
135 | } |
136 | } else { /* i == 2 */ |
137 | xread(fd_d, buf2, count); |
138 | if (memcmp(buf, buf2, count)) { |
139 | bb_error_msg_and_die("verification mismatch at 0x%"OFF_FMT"x", done); |
140 | } |
141 | } |
142 | |
143 | done += count; |
144 | } |
145 | |
146 | progress_newline(); |
147 | } |
148 | /* we won't come here if there was an error */ |
149 | |
150 | return EXIT_SUCCESS; |
151 | } |