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dd: Always move excess to beginning of buffer after read/write loops - sbase - … |
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git clone git://git.suckless.org/sbase |
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--- |
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commit 4b76652eff2b6f7d23c800dbc48c509792c726b3 |
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parent 7ef4038fb5b93e63f4223ab9f222526130a1e14f |
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Author: Michael Forney <[email protected]> |
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Date: Wed, 28 Apr 2021 01:41:26 -0700 |
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dd: Always move excess to beginning of buffer after read/write loops |
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Otherwise, while we may have enough room for at least one input |
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block, we may not have enough room for an output block. |
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Diffstat: |
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M dd.c | 7 +++---- |
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1 file changed, 3 insertions(+), 4 deletions(-) |
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--- |
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diff --git a/dd.c b/dd.c |
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@@ -222,11 +222,10 @@ main(int argc, char *argv[]) |
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ofull++; |
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opos += ret; |
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} while ((eof && ipos < opos) || (!eof && ipos - opos >= obs)); |
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- if (len - ipos < ibs) { |
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+ if (opos < ipos) |
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memmove(buf, buf + opos, ipos - opos); |
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- ipos -= opos; |
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- opos = 0; |
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- } |
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+ ipos -= opos; |
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+ opos = 0; |
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} |
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summary(); |
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