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dd: add a comment, no code changes

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2009-10-14 00:49:06 +02:00
parent 4e5b07b0fe
commit a1a3972f28
1 changed files with 3 additions and 3 deletions
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6
coreutils/dd.c
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@ -73,9 +73,9 @@ static void dd_output_status(int UNUSED_PARAM cur_signal)
* (sleep 1; echo DONE) | ./busybox dd >/dev/null
*/
diff_us -= G.begin_time_us;
/* We need to calculate "(total * 1M) / usec" without overflow.
/* We need to calculate "(total * 1000000) / usec" without overflow.
* this would work too, but is bigger than integer code below.
* total = G.total_bytes * (double)(1024 * 1024) / (diff_us ? diff_us : 1);
* total = G.total_bytes * (double)1000000 / (diff_us ? diff_us : 1);
*/
diff_scaled = diff_us;
total = G.total_bytes;
@ -83,7 +83,7 @@ static void dd_output_status(int UNUSED_PARAM cur_signal)
total >>= 1;
diff_scaled >>= 1;
}
total *= (1024 * 1024);
total *= (1024 * 1024); /* should be 1000000, but it's +45 bytes */
if (diff_scaled > 1)
total /= diff_scaled;
fprintf(stderr, "%f seconds, %sB/s\n",