test_copy.c
/*-
* Copyright (c) 2003-2007 Tim Kientzle
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "test.h"
__FBSDID("$FreeBSD: src/usr.bin/tar/test/test_copy.c,v 1.3 2008/08/15 06:12:02 kientzle Exp $");
#if defined(__CYGWIN__)
# include <limits.h>
# include <sys/cygwin.h>
#endif
/*
* Try to figure out how deep we can go in our tests. Assumes that
* the first call to this function has the longest starting cwd (which
* is currently "<testdir>/original"). This is mostly to work around
* limits in our Win32 support.
*
* Background: On Posix systems, PATH_MAX is merely a limit on the
* length of the string passed into a system call. By repeatedly
* calling chdir(), you can work with arbitrarily long paths on such
* systems. In contrast, Win32 APIs apply PATH_MAX limits to the full
* absolute path, so the permissible length of a system call argument
* varies with the cwd. Some APIs actually enforce limits
* significantly less than PATH_MAX to ensure that you can create
* files within the current working directory. The Win32 limits also
* apply to Cygwin before 1.7.
*
* Someday, I want to convert the Win32 support to use newer
* wide-character paths with '\\?\' prefix, which has a 32k PATH_MAX
* instead of the rather anemic 260 character limit of the older
* system calls. Then we can drop this mess (unless we want to
* continue to special-case Cygwin 1.5 and earlier).
*/
static int
compute_loop_max(void)
{
#if defined(_WIN32) && !defined(__CYGWIN__)
static int LOOP_MAX = 0;
char buf[MAX_PATH];
size_t cwdlen;
if (LOOP_MAX == 0) {
assert(_getcwd(buf, MAX_PATH) != NULL);
cwdlen = strlen(buf);
/* 12 characters = length of 8.3 filename */
/* 4 characters = length of "/../" used in symlink tests */
/* 1 character = length of extra "/" separator */
LOOP_MAX = MAX_PATH - (int)cwdlen - 12 - 4 - 1;
}
return LOOP_MAX;
#elif defined(__CYGWIN__) && !defined(HAVE_CYGWIN_CONV_PATH)
static int LOOP_MAX = 0;
if (LOOP_MAX == 0) {
char wbuf[PATH_MAX];
char pbuf[PATH_MAX];
size_t wcwdlen;
size_t pcwdlen;
size_t cwdlen;
assert(getcwd(pbuf, PATH_MAX) != NULL);
pcwdlen = strlen(pbuf);
cygwin_conv_to_full_win32_path(pbuf, wbuf);
wcwdlen = strlen(wbuf);
cwdlen = ((wcwdlen > pcwdlen) ? wcwdlen : pcwdlen);
/* Cygwin helper needs an extra few characters. */
LOOP_MAX = PATH_MAX - (int)cwdlen - 12 - 4 - 4;
}
return LOOP_MAX;
#else
/* cygwin-1.7 ends up here, along with "normal" unix */
return 200; /* restore pre-r278 depth */
#endif
}
/* filenames[i] is a distinctive filename of length i. */
/* To simplify interpreting failures, each filename ends with a
* decimal integer which is the length of the filename. E.g., A
* filename ending in "_92" is 92 characters long. To detect errors
* which drop or misplace characters, the filenames use a repeating
* "abcdefghijklmnopqrstuvwxyz..." pattern. */
static char *filenames[201];
static void
compute_filenames(void)
{
char buff[250];
size_t i,j;
filenames[0] = strdup("");
filenames[1] = strdup("1");
filenames[2] = strdup("a2");
for (i = 3; i < sizeof(filenames)/sizeof(filenames[0]); ++i) {
/* Fill with "abcdefghij..." */
for (j = 0; j < i; ++j)
buff[j] = 'a' + (j % 26);
buff[j--] = '\0';
/* Work from the end to fill in the number portion. */
buff[j--] = '0' + (i % 10);
if (i > 9) {
buff[j--] = '0' + ((i / 10) % 10);
if (i > 99)
buff[j--] = '0' + (i / 100);
}
buff[j] = '_';
/* Guard against obvious screwups in the above code. */
assertEqualInt(strlen(buff), i);
filenames[i] = strdup(buff);
}
}
static void
create_tree(void)
{
char buff[260];
char buff2[260];
int i;
int LOOP_MAX;
compute_filenames();
/* Log that we'll be omitting some checks. */
if (!canSymlink()) {
skipping("Symlink checks");
}
assertMakeDir("original", 0775);
chdir("original");
LOOP_MAX = compute_loop_max();
assertMakeDir("f", 0775);
assertMakeDir("l", 0775);
assertMakeDir("m", 0775);
assertMakeDir("s", 0775);
assertMakeDir("d", 0775);
for (i = 1; i < LOOP_MAX; i++) {
failure("Internal sanity check failed: i = %d", i);
assert(filenames[i] != NULL);
sprintf(buff, "f/%s", filenames[i]);
assertMakeFile(buff, 0777, buff);
/* Create a link named "l/abcdef..." to the above. */
sprintf(buff2, "l/%s", filenames[i]);
assertMakeHardlink(buff2, buff);
/* Create a link named "m/abcdef..." to the above. */
sprintf(buff2, "m/%s", filenames[i]);
assertMakeHardlink(buff2, buff);
if (canSymlink()) {
/* Create a symlink named "s/abcdef..." to the above. */
sprintf(buff, "s/%s", filenames[i]);
sprintf(buff2, "../f/%s", filenames[i]);
failure("buff=\"%s\" buff2=\"%s\"", buff, buff2);
assertMakeSymlink(buff, buff2);
}
/* Create a dir named "d/abcdef...". */
buff[0] = 'd';
failure("buff=\"%s\"", buff);
assertMakeDir(buff, 0775);
}
chdir("..");
}
#define LIMIT_NONE 200
#define LIMIT_USTAR 100
static void
verify_tree(size_t limit)
{
char name1[260];
char name2[260];
size_t i, LOOP_MAX;
LOOP_MAX = compute_loop_max();
/* Generate the names we know should be there and verify them. */
for (i = 1; i < LOOP_MAX; i++) {
/* Verify a file named "f/abcdef..." */
sprintf(name1, "f/%s", filenames[i]);
if (i <= limit) {
assertFileExists(name1);
assertFileContents(name1, strlen(name1), name1);
}
sprintf(name2, "l/%s", filenames[i]);
if (i + 2 <= limit) {
/* Verify hardlink "l/abcdef..." */
assertIsHardlink(name1, name2);
/* Verify hardlink "m/abcdef..." */
name2[0] = 'm';
assertIsHardlink(name1, name2);
}
if (canSymlink()) {
/* Verify symlink "s/abcdef..." */
sprintf(name1, "s/%s", filenames[i]);
sprintf(name2, "../f/%s", filenames[i]);
if (strlen(name2) <= limit)
assertIsSymlink(name1, name2);
}
/* Verify dir "d/abcdef...". */
sprintf(name1, "d/%s", filenames[i]);
if (i + 1 <= limit) { /* +1 for trailing slash */
if (assertIsDir(name1, -1)) {
/* TODO: opendir/readdir this
* directory and make sure
* it's empty.
*/
}
}
}
#if !defined(_WIN32) || defined(__CYGWIN__)
{
const char *dp;
/* Now make sure nothing is there that shouldn't be. */
for (dp = "dflms"; *dp != '\0'; ++dp) {
DIR *d;
struct dirent *de;
char dir[2];
dir[0] = *dp; dir[1] = '\0';
d = opendir(dir);
failure("Unable to open dir '%s'", dir);
if (!assert(d != NULL))
continue;
while ((de = readdir(d)) != NULL) {
char *p = de->d_name;
if (p[0] == '.')
continue;
switch(dp[0]) {
case 'l': case 'm': case 'd':
failure("strlen(p)=%d", strlen(p));
assert(strlen(p) < limit);
assertEqualString(p,
filenames[strlen(p)]);
break;
case 'f': case 's':
failure("strlen(p)=%d", strlen(p));
assert(strlen(p) < limit + 1);
assertEqualString(p,
filenames[strlen(p)]);
break;
default:
failure("File %s shouldn't be here", p);
assert(0);
}
}
closedir(d);
}
}
#endif
}
static void
copy_basic(void)
{
int r;
/* NOTE: for proper operation on cygwin-1.5 and windows, the
* length of the name of the directory below, "plain", must be
* less than or equal to the lengthe of the name of the original
* directory, "original" This restriction derives from the
* extremely limited pathname lengths on those platforms.
*/
assertMakeDir("plain", 0775);
assertEqualInt(0, chdir("plain"));
/*
* Use the tar program to create an archive.
*/
r = systemf("%s cf archive -C ../original f d l m s >pack.out 2>pack.err",
testprog);
failure("Error invoking \"%s cf\"", testprog);
assertEqualInt(r, 0);
/* Verify that nothing went to stdout or stderr. */
assertEmptyFile("pack.err");
assertEmptyFile("pack.out");
/*
* Use tar to unpack the archive into another directory.
*/
r = systemf("%s xf archive >unpack.out 2>unpack.err", testprog);
failure("Error invoking %s xf archive", testprog);
assertEqualInt(r, 0);
/* Verify that nothing went to stdout or stderr. */
assertEmptyFile("unpack.err");
assertEmptyFile("unpack.out");
verify_tree(LIMIT_NONE);
assertEqualInt(0, chdir(".."));
}
static void
copy_ustar(void)
{
const char *target = "ustar";
int r;
/* NOTE: for proper operation on cygwin-1.5 and windows, the
* length of the name of the directory below, "ustar", must be
* less than or equal to the lengthe of the name of the original
* directory, "original" This restriction derives from the
* extremely limited pathname lengths on those platforms.
*/
assertMakeDir(target, 0775);
assertEqualInt(0, chdir(target));
/*
* Use the tar program to create an archive.
*/
r = systemf("%s cf archive --format=ustar -C ../original f d l m s >pack.out 2>pack.err",
testprog);
failure("Error invoking \"%s cf archive --format=ustar\"", testprog);
assertEqualInt(r, 0);
/* Verify that nothing went to stdout. */
assertEmptyFile("pack.out");
/* Stderr is non-empty, since there are a bunch of files
* with filenames too long to archive. */
/*
* Use tar to unpack the archive into another directory.
*/
r = systemf("%s xf archive >unpack.out 2>unpack.err", testprog);
failure("Error invoking %s xf archive", testprog);
assertEqualInt(r, 0);
/* Verify that nothing went to stdout or stderr. */
assertEmptyFile("unpack.err");
assertEmptyFile("unpack.out");
chdir("original");
verify_tree(LIMIT_USTAR);
chdir("../..");
}
DEFINE_TEST(test_copy)
{
assertUmask(0);
create_tree(); /* Create sample files in "original" dir. */
/* Test simple "tar -c | tar -x" pipeline copy. */
copy_basic();
/* Same, but constrain to ustar format. */
copy_ustar();
}
