1#!/bin/bash 2 3[ -f testing.sh ] && . testing.sh 4 5#testing "name" "command" "result" "infile" "stdin" 6 7BIGTEST="one\ntwo\nthree\nfour\nfive\nsix\nseven\neight\nnine\nten\neleven\n" 8echo -ne "$BIGTEST" > file1 9testing "tail" "tail && echo yes" "oneyes\n" "" "one" 10testing "file" "tail file1" \ 11 "two\nthree\nfour\nfive\nsix\nseven\neight\nnine\nten\neleven\n" "" "" 12testing "-n in bounds" "tail -n 3 file1" "nine\nten\neleven\n" "" "" 13testing "-n out of bounds" "tail -n 999 file1" "$BIGTEST" "" "" 14testing "-n+ in bounds" "tail -n +3 file1" \ 15 "three\nfour\nfive\nsix\nseven\neight\nnine\nten\neleven\n" "" "" 16testing "-n+ outof bounds" "tail -n +999 file1" "" "" "" 17testing "-c in bounds" "tail -c 27 file1" \ 18 "even\neight\nnine\nten\neleven\n" "" "" 19testing "-c out of bounds" "tail -c 999 file1" "$BIGTEST" "" "" 20testing "-c+ in bounds" "tail -c +27 file1" \ 21 "x\nseven\neight\nnine\nten\neleven\n" "" "" 22testing "-c+ out of bonds" "tail -c +999 file1" "" "" "" 23testing "-N" "tail -1 file1" "eleven\n" "" "" 24rm file1 25 26testing "stdin no trailing newline" "tail -n 1 - " "c" "" "a\nb\nc" 27testing "file no trailing newline" "tail -n 1 input" "c" "a\nb\nc" "" 28 29testing "noseek -n in bounds" "tail -n 3" "nine\nten\neleven\n" \ 30 "" "$BIGTEST" 31testing "noseek -n out of bounds" "tail -n 999" "$BIGTEST" "" "$BIGTEST" 32testing "noseek -n+ in bounds" "tail -n +3" \ 33 "three\nfour\nfive\nsix\nseven\neight\nnine\nten\neleven\n" "" \ 34 "$BIGTEST" 35testing "noseek -n+ outof bounds" "tail -n +999" "" "" "$BIGTEST" 36testing "noseek -c in bounds" "tail -c 27" \ 37 "even\neight\nnine\nten\neleven\n" "" "$BIGTEST" 38testing "noseek -c out of bounds" "tail -c 999" "$BIGTEST" "" "$BIGTEST" 39testing "noseek -c+ in bounds" "tail -c +27" \ 40 "x\nseven\neight\nnine\nten\neleven\n" "" "$BIGTEST" 41testing "noseek -c+ out of bonds" "tail -c +999" "" "" "$BIGTEST" 42 43makebigfile() 44{ 45 for j in $(seq 1 100) 46 do 47 echo -n "$j " 48 for i in $(seq 1 100) 49 do 50 echo -n 123456789abcefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ 51 done 52 echo 53 done 54} 55makebigfile > bigfile 56 57testing "-c 12345 -n 3 bigfile" "tail -c 12345 -n 3 bigfile | md5sum" \ 58 "347bbdcbad8a313f4dc7bd558c5bfcb8 -\n" "" "" 59testing "-n 3 -c 12345 bigfile" "tail -n 3 -c 12345 bigfile | md5sum" \ 60 "1698825a750288284ec3ba7d8a59f302 -\n" "" "" 61rm bigfile 62 63echo 111 > one 64testing "-f one" \ 65 'tail -f one & sleep .25 ; echo two >> one; sleep .25; echo three >> one; sleep .25; kill $! >/dev/null' \ 66 "111\ntwo\nthree\n" "" "" 67rm one 68 69echo uno > one 70echo dos > two 71echo tres > three 72testing "-f one two three" \ 73 'tail -f one two three & sleep .25 ; echo more >> three ; echo also >> one; sleep .25; kill $! >/dev/null' \ 74 "==> one <==\nuno\n\n==> two <==\ndos\n\n==> three <==\ntres\nmore\n\n==> one <==\nalso\n" "" "" 75rm one two three 76 77testing "-F" "tail -s .1 -F walrus 2>/dev/null & sleep .2; echo hello > walrus; 78sleep .2; truncate -s 0 walrus; sleep .2; echo potato >> walrus; sleep .2; 79echo hello >> walrus; sleep .2; rm walrus; sleep .2; echo done > walrus; 80 sleep .5; kill %1" "hello\npotato\nhello\ndone\n" "" "" 81rm -f walrus 82