1#!/bin/bash 2 3[ -f testing.sh ] && . testing.sh 4 5#testing "name" "command" "result" "infile" "stdin" 6 7testing "xargs" "xargs && echo yes" "hello\nyes\n" "" "hello" 8testing "spaces" "xargs" \ 9 "one two three four\n" "" "one two\tthree \nfour\n\n" 10 11testing "-n 0" "xargs -n 0 2>/dev/null || echo ok" "ok\n" \ 12 "" "one \ntwo\n three" 13testing "-n 1" "xargs -n 1" "one\n" "" "one\n" 14testing "-n 2" "xargs -n 2" "one two\nthree\n" "" "one \ntwo\n three" 15testing "-n exact match" "xargs -n 3" "one two three\n" "" "one two three" 16testing "xargs2" "xargs -n2" "one two\nthree four\nfive\n" "" \ 17 "one two three four five" 18testing "-s too long" "xargs -s 9 echo 2>/dev/null; echo \$?" \ 19 "one\ntwo\n1\n" "" "one two three" 20testing "-s 13" "xargs -s 13 echo" "one two\nthree\n" "" "one \ntwo\n three" 21testing "-s 12" "xargs -s 12 echo" "one\ntwo\nthree\n" "" "one \ntwo\n three" 22# Check that we're accounting for the command *and* its arguments correctly. 23testing "-s counts args" "xargs -s 13 echo ' ' ' '" " one\n" "" "one\n" 24# 5 is the minimum allowed for the default "echo". 25testing "-s 4 fails" "xargs -s 4 2>/dev/null || echo bad" "bad\n" "" "" 26testing "-s 5 no input okay" "xargs -s 5" "\n" "" "" 27testing "-s 5 with input bad" "xargs -s 5 2>/dev/null || echo bad" "bad\n" \ 28 "" "a\n" 29 30touch one two three 31testing "command -opt" "xargs -n2 ls -1" "one\ntwo\nthree\n" "" \ 32 "one two three" 33rm one two three 34 35testing "-0 -n1" "printf 'a\0b\0c\0d\0e\0f' | xargs -0 -n1 echo _" "_ a\n_ b\n_ c\n_ d\n_ e\n_ f\n" "" "" 36testing "-0 -n2" "printf 'a\0b\0c\0d\0e\0f' | xargs -0 -n2 echo _" "_ a b\n_ c d\n_ e f\n" "" "" 37 38testing "-t" "xargs -t 2>stderr ; cat stderr ; rm stderr" "one two\necho one two \n" "" "one\ntwo\n" 39 40testing "-E END" "xargs -E END" "a b ENDE\n" "" "a\nb\nENDE\nEND\nc\nd\n" 41 42testing "-r" "xargs -r echo x" "" "" "" 43testing "no -r" "xargs echo x" "x\n" "" "" 44 45# Exit value madness. 0 and 126/127 are normal. 46testing "true" "xargs true; echo \$?" "0\n" "" "" 47testing "command not found" "xargs does-not-exist 2>/dev/null; echo \$?" \ 48 "127\n" "" "" 49# But 1-125 are flattened to 123. 50testing "false" "xargs false; echo \$?" "123\n" "" "" 51# 255 is special "abort early" magic. 52testing "exit 255" "xargs sh -c 'exit 255' 2>&1; echo \$?" \ 53 "xargs: sh: exited with status 255; aborting\n124\n" "" "" 54 55# findutils maxes out at 131066 (they do the math wrong), kernel takes 131071. 56toyonly testing "max argument size" \ 57 "head -c 131071 /dev/zero | tr '\0' x | xargs | wc -c" "131072\n" "" "" 58X=$(head -c 131066 /dev/zero | tr '\0' x) 59# This goes over the kernel's 10 meg limit 60testing "big input forces split" \ 61 'for i in $(seq 1 100);do echo $X;done|{ xargs >/dev/null && echo yes;}' \ 62 "yes\n" "" "" 63 64# -P max-proc 65testing "max-proc=1" "xargs -n 1 -P 1" "one\ntwo\nthree\n" "" "one\ntwo\nthree\n" 66testing "max-proc=2" "xargs -n 1 -P 2" "y\ny\ny\n" "" "y\ny\ny\n" 67testing "max-proc=3" "xargs -n 1 -P 3" "y\ny\ny\n" "" "y\ny\ny\n" 68# 3 seconds vs 2 seconds vs 1 second parallel sleep 69testing "parallel sleep" " 70 xargs_sleep() { 71 ( yes | head -3 | tr y 1 | time -p xargs -n 1 \${*} sleep ) 2>&1 | 72 sed -n 's/^real *\([0-9]*\)[.]\(.*\)/\1\2/p' 73 } && 74 A=\`xargs_sleep\` && 75 B=\`xargs_sleep -P 2\` && 76 C=\`xargs_sleep -P 0\` && 77 [ \${A} -gt \${B} -a \${B} -gt \${C} ] && echo OK || echo FAIL" "OK\n" "" "" 78 79# TODO: what exactly is -x supposed to do? why does coreutils output "one"? 80#testing "-x" "xargs -x -s 9 || echo expected" "one\nexpected\n" "" "one\ntwo\nthree" 81 82# TODO: test for -L? what exactly is the difference between -n and -L? 83 84#testing "-n exact match" 85#testing "-s exact match" 86#testing "-s impossible" 87