release/src/router/busybox/miscutils/flashcp.c

   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 source tree.
   8  */
   9
  10 //usage:#define flashcp_trivial_usage
  11 //usage:       "-v FILE MTD_DEVICE"
  12 //usage:#define flashcp_full_usage "\n\n"
  13 //usage:       "Copy an image to MTD device\n"
  14 //usage:     "\n        -v      Verbose"
  15
  16 #include "libbb.h"
  17 #include <mtd/mtd-user.h>
  18
  19 #define MTD_DEBUG 0
  20
  21 #define OPT_v (1 << 0)
  22
  23 #define BUFSIZE (8 * 1024)
  24
  25 static void progress(int mode, uoff_t count, uoff_t total)
  26 {
  27         uoff_t percent;
  28
  29         if (!option_mask32) //if (!(option_mask32 & OPT_v))
  30                 return;
  31         percent = count * 100;
  32         if (total)
  33                 percent = (unsigned) (percent / total);
  34         printf("\r%s: %"OFF_FMT"u/%"OFF_FMT"u (%u%%) ",
  35                 (mode == 0) ? "Erasing block" : ((mode == 1) ? "Writing kb" : "Verifying kb"),
  36                 count, total, (unsigned)percent);
  37         fflush_all();
  38 }
  39
  40 static void progress_newline(void)
  41 {
  42         if (!option_mask32) //if (!(option_mask32 & OPT_v))
  43                 return;
  44         bb_putchar('\n');
  45 }
  46
  47 int flashcp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  48 int flashcp_main(int argc UNUSED_PARAM, char **argv)
  49 {
  50         int fd_f, fd_d; /* input file and mtd device file descriptors */
  51         int i;
  52         uoff_t erase_count;
  53         struct mtd_info_user mtd;
  54         struct erase_info_user e;
  55         struct stat statb;
  56 //      const char *filename, *devicename;
  57         RESERVE_CONFIG_UBUFFER(buf, BUFSIZE);
  58         RESERVE_CONFIG_UBUFFER(buf2, BUFSIZE);
  59
  60         opt_complementary = "=2"; /* exactly 2 non-option args: file, dev */
  61         /*opts =*/ getopt32(argv, "v");
  62         argv += optind;
  63 //      filename = *argv++;
  64 //      devicename = *argv;
  65 #define filename argv[0]
  66 #define devicename argv[1]
  67
  68         /* open input file and mtd device and do sanity checks */
  69         fd_f = xopen(filename, O_RDONLY);
  70         fstat(fd_f, &statb);
  71         fd_d = xopen(devicename, O_SYNC | O_RDWR);
  72 #if !MTD_DEBUG
  73         if (ioctl(fd_d, MEMGETINFO, &mtd) < 0) {
  74                 bb_error_msg_and_die("%s is not a MTD flash device", devicename);
  75         }
  76         if (statb.st_size > mtd.size) {
  77                 bb_error_msg_and_die("%s bigger than %s", filename, devicename);
  78         }
  79 #else
  80         mtd.erasesize = 64 * 1024;
  81 #endif
  82
  83         /* always erase a complete block */
  84         erase_count = (uoff_t)(statb.st_size + mtd.erasesize - 1) / mtd.erasesize;
  85         /* erase 1 block at a time to be able to give verbose output */
  86         e.length = mtd.erasesize;
  87 #if 0
  88 /* (1) bloat
  89  * (2) will it work for multi-gigabyte devices?
  90  * (3) worse wrt error detection granularity
  91  */
  92         /* optimization: if not verbose, erase in one go */
  93         if (!opts) { // if (!(opts & OPT_v))
  94                 e.length = mtd.erasesize * erase_count;
  95                 erase_count = 1;
  96         }
  97 #endif
  98         e.start = 0;
  99         for (i = 1; i <= erase_count; i++) {
 100                 progress(0, i, erase_count);
 101                 errno = 0;
 102 #if !MTD_DEBUG
 103                 if (ioctl(fd_d, MEMERASE, &e) < 0) {
 104                         bb_perror_msg_and_die("erase error at 0x%llx on %s",
 105                                 (long long)e.start, devicename);
 106                 }
 107 #else
 108                 usleep(100*1000);
 109 #endif
 110                 e.start += mtd.erasesize;
 111         }
 112         progress_newline();
 113
 114         /* doing this outer loop gives significantly smaller code
 115          * than doing two separate loops for writing and verifying */
 116         for (i = 1; i <= 2; i++) {
 117                 uoff_t done;
 118                 unsigned count;
 119
 120                 xlseek(fd_f, 0, SEEK_SET);
 121                 xlseek(fd_d, 0, SEEK_SET);
 122                 done = 0;
 123                 count = BUFSIZE;
 124                 while (1) {
 125                         uoff_t rem = statb.st_size - done;
 126                         if (rem == 0)
 127                                 break;
 128                         if (rem < BUFSIZE)
 129                                 count = rem;
 130                         progress(i, done / 1024, (uoff_t)statb.st_size / 1024);
 131                         xread(fd_f, buf, count);
 132                         if (i == 1) {
 133                                 int ret;
 134                                 errno = 0;
 135                                 ret = full_write(fd_d, buf, count);
 136                                 if (ret != count) {
 137                                         bb_perror_msg_and_die("write error at 0x%"OFF_FMT"x on %s, "
 138                                                 "write returned %d",
 139                                                 done, devicename, ret);
 140                                 }
 141                         } else { /* i == 2 */
 142                                 xread(fd_d, buf2, count);
 143                                 if (memcmp(buf, buf2, count)) {
 144                                         bb_error_msg_and_die("verification mismatch at 0x%"OFF_FMT"x", done);
 145                                 }
 146                         }
 147
 148                         done += count;
 149                 }
 150
 151                 progress_newline();
 152         }
 153         /* we won't come here if there was an error */
 154
 155         return EXIT_SUCCESS;
 156 }