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c495cbcfe2
* tests/misc/yes.sh: Disable other related zero-copy syscalls to ensure better testing of future or other implementations. https://github.com/coreutils/coreutils/pull/227
89 lines
2.9 KiB
Bash
Executable File
89 lines
2.9 KiB
Bash
Executable File
#!/bin/sh
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# Validate yes buffer handling
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# Copyright (C) 2015-2026 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 <https://www.gnu.org/licenses/>.
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. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
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print_ver_ yes
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getlimits_
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uses_strace_
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# Check basic operation
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test "$(yes | head -n1)" = 'y' || fail=1
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# Check various single item sizes, with the most important
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# size being BUFSIZ used for the local buffer to yes(1).
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# Note a \n is added, so actual sizes required internally
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# are 1 more than the size used here.
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for size in 1 1999 4095 4096 8191 8192 16383 16384; do
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printf "%${size}s\n" '' > out.1
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yes "$(printf %${size}s '')" | head -n2 | uniq > out.2
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compare out.1 out.2 || fail=1
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done
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# Check the many small items case,
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# both fitting and overflowing the internal buffer.
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# First check that 4000 arguments supported.
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if test 4000 -eq $(sh -c 'echo $#' 0 $(seq 4000)); then
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for i in 100 4000; do
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seq $i | paste -s -d ' ' | sed p > out.1
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yes $(seq $i) | head -n2 > out.2
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compare out.1 out.2 || fail=1
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done
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fi
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# Check a single appropriate diagnostic is output on write error
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if test -w /dev/full && test -c /dev/full; then
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# The single output diagnostic expected,
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# (without the possibly varying :strerror(ENOSPC) suffix).
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printf '%s\n' "yes: standard output: $ENOSPC" > exp
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for size in 1 16384; do
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returns_ 1 yes "$(printf %${size}s '')" >/dev/full 2>err || fail=1
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compare exp err || fail=1
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done
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fi
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# Check the non pipe output case, since that is different with splice
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if timeout 10 true; then
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timeout .1 yes >/dev/null
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test $? = 124 || fail=1
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fi
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# Ensure we fallback to write() if there is an issue with (async) zero-copy
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zc_syscalls='io_uring_setup io_uring_enter io_uring_register memfd_create
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sendfile splice tee vmsplice'
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syscalls=$(
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for s in $zc_syscalls; do
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strace -qe "$s" true >/dev/null 2>&1 && echo "$s"
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done | paste -s -d,)
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no_zero_copy() {
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strace -f -o /dev/null -e inject=${syscalls}:error=ENOSYS "$@"
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}
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if no_zero_copy true; then
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test "$(no_zero_copy yes | head -n2 | paste -s -d '')" = 'yy' || fail=1
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fi
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# Ensure we fallback to write() if there is an issue with pipe2()
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# For example if we don't have enough file descriptors available.
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no_pipe() { strace -f -o /dev/null -e inject=pipe,pipe2:error=EMFILE "$@"; }
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if no_pipe true; then
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no_pipe timeout .1 yes >/dev/null
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test $? = 124 || fail=1
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fi
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Exit $fail
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