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4bb5dbcfef
These edge cases were missed in the previous commit 140eca15c.
* src/dd.c (main): Include the bytes slop when truncating
without further I/O. Don't invalidate the whole file cache
in the case where 0 < count < ibs.
* tests/dd/bytes: Change to using the independent truncate
command to generate the file for comparison. Remove a redundant
test case and replace with one testing the truncation only logic.
57 lines
1.6 KiB
Bash
Executable File
57 lines
1.6 KiB
Bash
Executable File
#!/bin/sh
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# Copyright (C) 2012 Free Software Foundation, Inc.
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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. "${srcdir=.}/init.sh"; path_prepend_ ../src
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print_ver_ dd
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# count_bytes
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echo 0123456789abcdefghijklm > in || framework_failure_
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dd count=14 conv=swab iflag=count_bytes < in > out 2> /dev/null || fail=1
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case `cat out` in
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1032547698badc) ;;
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*) fail=1 ;;
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esac
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# skip_bytes
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echo 0123456789abcdefghijklm > in || framework_failure_
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dd skip=10 iflag=skip_bytes < in > out 2> /dev/null || fail=1
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case `cat out` in
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abcdefghijklm) ;;
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*) fail=1 ;;
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esac
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# skip records and bytes from pipe
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echo 0123456789abcdefghijklm |
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dd skip=10 bs=2 iflag=skip_bytes > out 2> /dev/null || fail=1
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case `cat out` in
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abcdefghijklm) ;;
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*) fail=1 ;;
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esac
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# seek bytes
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echo abcdefghijklm |
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dd bs=5 seek=8 oflag=seek_bytes > out 2> /dev/null || fail=1
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printf '\0\0\0\0\0\0\0\0abcdefghijklm\n' > expected
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compare expected out || fail=1
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# Just truncation, no I/O
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dd bs=5 seek=8 oflag=seek_bytes of=out2 count=0 2> /dev/null || fail=1
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truncate -s8 expected2
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compare expected2 out2 || fail=1
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Exit $fail
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