mirror of
git://git.sv.gnu.org/coreutils.git
synced 2026-04-20 02:36:16 +02:00
f7867e73ca
* src/shuf.c (main): If -n0 specified then no data would ever be output, so exit without reading input. * tests/misc/shuf.sh: Augment the related test with this case.
67 lines
2.3 KiB
Bash
Executable File
67 lines
2.3 KiB
Bash
Executable File
#!/bin/sh
|
|
# Ensure that shuf randomizes its input.
|
|
|
|
# Copyright (C) 2006-2013 Free Software Foundation, Inc.
|
|
|
|
# This program is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
|
|
print_ver_ shuf
|
|
getlimits_
|
|
|
|
seq 100 > in || framework_failure_
|
|
|
|
shuf in >out || fail=1
|
|
|
|
# Fail if the input is the same as the output.
|
|
# This is a probabilistic test :-)
|
|
# However, the odds of failure are very low: 1 in 100! (~ 1 in 10^158)
|
|
compare in out > /dev/null && { fail=1; echo "not random?" 1>&2; }
|
|
|
|
# Fail if the sorted output is not the same as the input.
|
|
sort -n out > out1
|
|
compare in out1 || { fail=1; echo "not a permutation" 1>&2; }
|
|
|
|
# Exercise shuf's -i option.
|
|
shuf -i 1-100 > out || fail=1
|
|
compare in out > /dev/null && { fail=1; echo "not random?" 1>&2; }
|
|
sort -n out > out1
|
|
compare in out1 || { fail=1; echo "not a permutation" 1>&2; }
|
|
|
|
# Exercise shuf's -e option.
|
|
t=$(shuf -e a b c d e | sort | fmt)
|
|
test "$t" = 'a b c d e' || { fail=1; echo "not a permutation" 1>&2; }
|
|
|
|
# Before coreutils-6.3, this would infloop.
|
|
# "seq 1860" produces 8193 (8K + 1) bytes of output.
|
|
seq 1860 | shuf > /dev/null || fail=1
|
|
|
|
# coreutils-6.12 and earlier would output a newline terminator, not \0.
|
|
shuf --zero-terminated -i 1-1 > out || fail=1
|
|
printf '1\0' > exp || framework_failure_
|
|
cmp out exp || { fail=1; echo "missing NUL terminator?" 1>&2; }
|
|
|
|
# Ensure shuf -n operates efficiently for small n. Before coreutils-8.13
|
|
# this would try to allocate $SIZE_MAX * sizeof(size_t)
|
|
timeout 10 shuf -i1-$SIZE_MAX -n2 >/dev/null ||
|
|
{ fail=1; echo "couldn't get a small subset" >&2; }
|
|
|
|
# Ensure shuf -n0 doesn't read any input or open specified files
|
|
touch unreadable || framework_failure_
|
|
chmod 0 unreadable || framework_failure_
|
|
shuf -n0 unreadable || fail=1
|
|
shuf -n1 unreadable && fail=1
|
|
|
|
Exit $fail
|