93e55513cf
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101 lines
3.1 KiB
Diff
101 lines
3.1 KiB
Diff
From bb0e7fabcaed9a7e71e30f05e638e9f243cdb13e Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?P=C3=A1draig=20Brady?= <P@draigBrady.com>
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Date: Mon, 25 Jan 2021 14:12:48 +0000
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Subject: [PATCH] split: fix --number=K/N to output correct part of file
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This functionality regressed with the adjustments
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in commit v8.25-4-g62e7af032
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* src/split.c (bytes_chunk_extract): Account for already read data
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when seeking into the file.
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* tests/split/b-chunk.sh: Use the hidden ---io-blksize option,
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to test this functionality.
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Fixes https://bugs.gnu.org/46048
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Upstream-commit: bb21daa125aeb4e32546309d370918ca47e612db
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Signed-off-by: Kamil Dudka <kdudka@redhat.com>
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---
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src/split.c | 2 +-
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tests/split/b-chunk.sh | 45 ++++++++++++++++++++++++------------------
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2 files changed, 27 insertions(+), 20 deletions(-)
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diff --git a/src/split.c b/src/split.c
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index 09e610b..19248f6 100644
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--- a/src/split.c
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+++ b/src/split.c
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@@ -1001,7 +1001,7 @@ bytes_chunk_extract (uintmax_t k, uintmax_t n, char *buf, size_t bufsize,
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}
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else
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{
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- if (lseek (STDIN_FILENO, start, SEEK_CUR) < 0)
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+ if (lseek (STDIN_FILENO, start - initial_read, SEEK_CUR) < 0)
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die (EXIT_FAILURE, errno, "%s", quotef (infile));
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initial_read = SIZE_MAX;
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}
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diff --git a/tests/split/b-chunk.sh b/tests/split/b-chunk.sh
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index 864ce55..39a6799 100755
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--- a/tests/split/b-chunk.sh
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+++ b/tests/split/b-chunk.sh
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@@ -35,32 +35,39 @@ split -e -n 10 /dev/null || fail=1
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returns_ 1 stat x?? 2>/dev/null || fail=1
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printf '1\n2\n3\n4\n5\n' > input || framework_failure_
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+printf '1\n2' > exp-1 || framework_failure_
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+printf '\n3\n' > exp-2 || framework_failure_
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+printf '4\n5\n' > exp-3 || framework_failure_
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for file in input /proc/version /sys/kernel/profiling; do
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test -f $file || continue
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- split -n 3 $file > out || fail=1
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- split -n 1/3 $file > b1 || fail=1
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- split -n 2/3 $file > b2 || fail=1
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- split -n 3/3 $file > b3 || fail=1
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+ for blksize in 1 2 4096; do
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+ if ! test "$file" = 'input'; then
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+ # For /proc like files we must be able to read all
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+ # into the internal buffer to be able to determine size.
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+ test "$blksize" = 4096 || continue
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+ fi
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- case $file in
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- input)
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- printf '1\n2' > exp-1
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- printf '\n3\n' > exp-2
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- printf '4\n5\n' > exp-3
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+ split -n 3 ---io-blksize=$blksize $file > out || fail=1
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+ split -n 1/3 ---io-blksize=$blksize $file > b1 || fail=1
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+ split -n 2/3 ---io-blksize=$blksize $file > b2 || fail=1
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+ split -n 3/3 ---io-blksize=$blksize $file > b3 || fail=1
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- compare exp-1 xaa || fail=1
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- compare exp-2 xab || fail=1
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- compare exp-3 xac || fail=1
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- ;;
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- esac
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+ case $file in
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+ input)
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+ compare exp-1 xaa || fail=1
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+ compare exp-2 xab || fail=1
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+ compare exp-3 xac || fail=1
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+ ;;
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+ esac
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- compare xaa b1 || fail=1
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- compare xab b2 || fail=1
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- compare xac b3 || fail=1
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- cat xaa xab xac | compare - $file || fail=1
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- test -f xad && fail=1
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+ compare xaa b1 || fail=1
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+ compare xab b2 || fail=1
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+ compare xac b3 || fail=1
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+ cat xaa xab xac | compare - $file || fail=1
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+ test -f xad && fail=1
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+ done
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done
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Exit $fail
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--
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2.26.2
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