From 670626ab009f1d369be94def71f48be2e88f0106 Mon Sep 17 00:00:00 2001 From: Isaac Dunham Date: Sun, 1 Jun 2014 13:50:39 -0500 Subject: cpio: archive more files While writing tests for cpio, I found that cpio tries to open empty files if they're regular files, and fails to archive them if unreadable. This can be easily avoided, and is not the usual behavior. --- scripts/test/cpio.test | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100755 scripts/test/cpio.test (limited to 'scripts/test') diff --git a/scripts/test/cpio.test b/scripts/test/cpio.test new file mode 100755 index 00000000..d0528e52 --- /dev/null +++ b/scripts/test/cpio.test @@ -0,0 +1,39 @@ +#!/bin/bash + +[ -f testing.sh ] && . testing.sh + +# We need to test name and file padding. +# This means all possible values of strlen(name)+1 % 4, +# plus file sizes of at least 0-4. + +touch a bb ccc dddd +testing "cpio name padding" "cpio -o -H newc|cpio -it" "a\nbb\nccc\ndddd\n" "" "a\nbb\nccc\ndddd\n" +rm a bb ccc dddd + +touch a +printf '1' >b +printf '22' >c +printf '333' >d +testing "cpio file padding" "cpio -o -H newc|cpio -it" "a\nb\nc\nd\n" "" "a\nb\nc\nd\n" +rm a b c d + +touch a +printf '1' >bb +printf '22' >ccc +printf '333' >dddd +# With the proper padding, header length, and file length, +# the relevant bit should be here: +# 110*5 + 4*3 + 2 + 6*3 = 550 + 12 + 20 = 582 +# files are padded to n*4, names are padded to 2 + n*4 due to the header length +testing "cpio archive length" "cpio -o -H newc|dd ibs=2 skip=291 count=5" "TRAILER!!!" "" "a\nbb\nccc\ndddd\n" +testing "cpio archive magic" "cpio -o -H newc|dd ibs=2 count=3" "070701" "" "a\n" +# check name length (8 bytes before the empty "crc") +testing "cpio name length" "cpio -o -H newc|dd ibs=2 skip=47 count=4" "00000002" "" "a\n" +rm a bb ccc dddd + +# archive dangling symlinks and empty files even if we cannot open them +touch a; chmod a-rwx a; ln -s a/cant b +testing "cpio archives unreadable empty files" "cpio -o -H newc|cpio -it" "a\nb\n" "" "a\nb\n" +chmod u+rw a; rm -f a b + + -- cgit v1.2.3