/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2003-2007 Tim Kientzle
 * All rights reserved.
 */
#include "test.h"

#ifdef HAVE_GETEUID
#define getuid() geteuid()
#endif
#ifdef HAVE_GETEGID
#define getgid() getegid()
#endif

/* Number of bytes needed to pad 'n' to multiple of 'block', assuming
 * that 'block' is a power of two. This trick can be more easily
 * remembered as -n & (block - 1), but many compilers quite reasonably
 * warn about "-n" when n is an unsigned value.  (~(n) + 1) is the
 * same thing, but written in a way that won't offend anyone. */
#define PAD(n, block)  ((~(n) + 1) & ((block) - 1))

static int
is_hex(const char *p, size_t l)
{
	while (l > 0) {
		if ((*p >= '0' && *p <= '9')
		    || (*p >= 'a' && *p <= 'f')
		    || (*p >= 'A' && *p <= 'F'))
		{
			--l;
			++p;
		} else
			return (0);

	}
	return (1);
}

/* Convert up to 8 hex characters to unsigned 32-bit decimal integer */
static uint32_t
from_hex(const char *p, size_t l)
{
	uint32_t r = 0;

	while (l > 0) {
		r *= 16;
		if (*p >= 'a' && *p <= 'f')
			r += *p + 10 - 'a';
		else if (*p >= 'A' && *p <= 'F')
			r += *p + 10 - 'A';
		else
			r += *p - '0';
		--l;
		++p;
	}
	return (r);
}

#if !defined(_WIN32) || defined(__CYGWIN__)
static int
nlinks(const char *p)
{
	struct stat st;
	assertEqualInt(0, stat(p, &st));
	return st.st_nlink;
}
#endif

DEFINE_TEST(test_format_newc)
{
	FILE *list;
	int r;
	uint32_t devmajor, devminor, ino, gid, uid;
	time_t t, t2, now;
	char *p, *e;
	size_t s;
	uint64_t fs, ns;
	char result[1024];

	assertUmask(0);

#if !defined(_WIN32)
	uid = getuid();
#endif

	/*
	 * Create an assortment of files.
	 * TODO: Extend this to cover more filetypes.
	 */
	list = fopen("list", "w");

	/* "file1" */
	assertMakeFile("file1", 0644, "1234567890");
	fprintf(list, "file1\n");

	/* "hardlink" */
	assertMakeHardlink("hardlink", "file1");
	fprintf(list, "hardlink\n");

	/* Another hardlink, but this one won't be archived. */
	assertMakeHardlink("hardlink2", "file1");

	/* "symlink" */
	if (canSymlink()) {
		assertMakeSymlink("symlink", "file1", 0);
		fprintf(list, "symlink\n");
	}

	/* "dir" */
	assertMakeDir("dir", 0775);
	fprintf(list, "dir\n");

	/* Setup result message. */
	memset(result, 0, sizeof(result));
	if (is_LargeInode("file1")) {
		strncat(result,
		    "bsdcpio: file1: large inode number truncated: ",
		    sizeof(result) - strlen(result) -1);
		strncat(result, strerror(ERANGE),
		    sizeof(result) - strlen(result) -1);
		strncat(result, "\n",
		    sizeof(result) - strlen(result) -1);
	}
	if (canSymlink() && is_LargeInode("symlink")) {
		strncat(result,
		    "bsdcpio: symlink: large inode number truncated: ",
		    sizeof(result) - strlen(result) -1);
		strncat(result, strerror(ERANGE),
		    sizeof(result) - strlen(result) -1);
		strncat(result, "\n",
		    sizeof(result) - strlen(result) -1);
	}
	if (is_LargeInode("dir")) {
		strncat(result,
		    "bsdcpio: dir: large inode number truncated: ",
		    sizeof(result) - strlen(result) -1);
		strncat(result, strerror(ERANGE),
		    sizeof(result) - strlen(result) -1);
		strncat(result, "\n",
		    sizeof(result) - strlen(result) -1);
	}
	if (is_LargeInode("hardlink")) {
		strncat(result,
		    "bsdcpio: hardlink: large inode number truncated: ",
		    sizeof(result) - strlen(result) -1);
		strncat(result, strerror(ERANGE),
		    sizeof(result) - strlen(result) -1);
		strncat(result, "\n",
		    sizeof(result) - strlen(result) -1);
	}

	/* Record some facts about what we just created: */
	now = time(NULL); /* They were all created w/in last two seconds. */

	/* Use the cpio program to create an archive. */
	fclose(list);
	r = systemf("%s -o --format=newc <list >newc.out 2>newc.err",
	    testprog);
	if (!assertEqualInt(r, 0))
		return;

	/* Verify that nothing went to stderr. */
	if (canSymlink()) {
		strncat(result, "2 blocks\n", sizeof(result) - strlen(result) -1);
	} else {
		strncat(result, "1 block\n", sizeof(result) - strlen(result) -1);
	}
	assertTextFileContents(result, "newc.err");

	/* Verify that stdout is a well-formed cpio file in "newc" format. */
	p = slurpfile(&s, "newc.out");
	assertEqualInt(s, canSymlink() ? 1024 : 512);
	e = p;

	/*
	 * Some of these assertions could be stronger, but it's
	 * a little tricky because they depend on the local environment.
	 */

	/* First entry is "file1" */
	assert(is_hex(e, 110)); /* Entire header is octal digits. */
	assertEqualMem(e + 0, "070701", 6); /* Magic */
	ino = from_hex(e + 6, 8); /* ino */
#if defined(_WIN32) && !defined(__CYGWIN__)
	/* Group members bits and others bits do not work. */
	assertEqualInt(0x8180, from_hex(e + 14, 8) & 0xffc0); /* Mode */
#else
	assertEqualInt(0x81a4, from_hex(e + 14, 8)); /* Mode */
#endif
#if defined(_WIN32)
	uid = from_hex(e + 22, 8);
#else
	assertEqualInt(from_hex(e + 22, 8), uid); /* uid */
#endif
	gid = from_hex(e + 30, 8); /* gid */
	assertEqualMem(e + 38, "00000003", 8); /* nlink */
	t = from_hex(e + 46, 8); /* mtime */
	failure("t=%#08jx now=%#08jx=%jd", (uintmax_t)t, (uintmax_t)now,
	    (intmax_t)now);
	assert(t <= now + 1); /* Allow 1 sec margin for timing variations. */
	failure("t=%#08jx now - 2=%#08jx=%jd", (uintmax_t)t, (uintmax_t)now - 2,
	    (intmax_t)now - 2);
	assert(t >= now - 2); /* File was created w/in last 2 secs. */
	failure("newc format stores body only with last appearance of a link\n"
	    "       first appearance should be empty, so this file size\n"
	    "       field should be zero");
	assertEqualInt(0, from_hex(e + 54, 8)); /* File size */
	fs = (uint64_t)from_hex(e + 54, 8);
	fs += PAD(fs, 4);
	devmajor = from_hex(e + 62, 8); /* devmajor */
	devminor = from_hex(e + 70, 8); /* devminor */
	assert(is_hex(e + 78, 8)); /* rdevmajor */
	assert(is_hex(e + 86, 8)); /* rdevminor */
	assertEqualMem(e + 94, "00000006", 8); /* Name size */
	ns = (uint64_t)from_hex(e + 94, 8);
	ns += PAD(ns + 2, 4);
	assertEqualInt(0, from_hex(e + 102, 8)); /* check field */
	assertEqualMem(e + 110, "file1\0", 6); /* Name contents */
	/* Since there's another link, no file contents here. */
	/* But add in file size so that an error here doesn't cascade. */
	e += 110 + fs + ns;

	if (canSymlink()) {
		/* "symlink" pointing to "file1" */
		assert(is_hex(e, 110));
		assertEqualMem(e + 0, "070701", 6); /* Magic */
		assert(is_hex(e + 6, 8)); /* ino */
#if defined(_WIN32) && !defined(__CYGWIN__)
		/* Mode: Group members bits and others bits do not work. */
		assertEqualInt(0xa180, from_hex(e + 14, 8) & 0xffc0);
#else
		assertEqualInt(0xa1ff, from_hex(e + 14, 8)); /* Mode */
#endif
		assertEqualInt(from_hex(e + 22, 8), uid); /* uid */
		assertEqualInt(gid, from_hex(e + 30, 8)); /* gid */
		assertEqualMem(e + 38, "00000001", 8); /* nlink */
		t2 = from_hex(e + 46, 8); /* mtime */
		failure("First entry created at t=%#08jx this entry created"
		    " at t2=%#08jx", (uintmax_t)t, (uintmax_t)t2);
		assert(t2 == t || t2 == t + 1); /* Almost same as first entry. */
		assertEqualMem(e + 54, "00000005", 8); /* File size */
		fs = (uint64_t)from_hex(e + 54, 8);
		fs += PAD(fs, 4);
		assertEqualInt(devmajor, from_hex(e + 62, 8)); /* devmajor */
		assertEqualInt(devminor, from_hex(e + 70, 8)); /* devminor */
		assert(is_hex(e + 78, 8)); /* rdevmajor */
		assert(is_hex(e + 86, 8)); /* rdevminor */
		assertEqualMem(e + 94, "00000008", 8); /* Name size */
		ns = (uint64_t)from_hex(e + 94, 8);
		ns += PAD(ns + 2, 4);
		assertEqualInt(0, from_hex(e + 102, 8)); /* check field */
		assertEqualMem(e + 110, "symlink\0\0\0", 10); /* Name contents */
		assertEqualMem(e + 110 + ns, "file1\0\0\0", 8); /* symlink target */
		e += 110 + fs + ns;
	}

	/* "dir" */
	assert(is_hex(e, 110));
	assertEqualMem(e + 0, "070701", 6); /* Magic */
	assert(is_hex(e + 6, 8)); /* ino */
#if defined(_WIN32) && !defined(__CYGWIN__)
	/* Group members bits and others bits do not work. */
	assertEqualInt(0x41c0, from_hex(e + 14, 8) & 0xffc0); /* Mode */
#else
	/* Mode: sgid bit sometimes propagates from parent dirs, ignore it. */
	assertEqualInt(040775, from_hex(e + 14, 8) & ~02000);
#endif
	assertEqualInt(uid, from_hex(e + 22, 8)); /* uid */
	assertEqualInt(gid, from_hex(e + 30, 8)); /* gid */
#if !defined(_WIN32) || defined(__CYGWIN__)
	assertEqualInt(nlinks("dir"), from_hex(e + 38, 8)); /* nlinks */
#endif
	t2 = from_hex(e + 46, 8); /* mtime */
	failure("First entry created at t=%#08jx this entry created at"
	    "t2=%#08jx", (uintmax_t)t, (uintmax_t)t2);
	assert(t2 == t || t2 == t + 1); /* Almost same as first entry. */
	assertEqualMem(e + 54, "00000000", 8); /* File size */
	fs = (uint64_t)from_hex(e + 54, 8);
	fs += PAD(fs, 4);
	assertEqualInt(devmajor, from_hex(e + 62, 8)); /* devmajor */
	assertEqualInt(devminor, from_hex(e + 70, 8)); /* devminor */
	assert(is_hex(e + 78, 8)); /* rdevmajor */
	assert(is_hex(e + 86, 8)); /* rdevminor */
	assertEqualMem(e + 94, "00000004", 8); /* Name size */
	ns = (uint64_t)from_hex(e + 94, 8);
	ns += PAD(ns + 2, 4);
	assertEqualInt(0, from_hex(e + 102, 8)); /* check field */
	assertEqualMem(e + 110, "dir\0\0\0", 6); /* Name contents */
	e += 110 + fs + ns;

	/* Hardlink identical to "file1" */
	/* Since we only wrote two of the three links to this
	 * file, this link should get deferred by the hardlink logic. */
	assert(is_hex(e, 110));
	assertEqualMem(e + 0, "070701", 6); /* Magic */
	failure("If these aren't the same, then the hardlink detection failed to match them.");
	assertEqualInt(ino, from_hex(e + 6, 8)); /* ino */
#if defined(_WIN32) && !defined(__CYGWIN__)
	/* Group members bits and others bits do not work. */
	assertEqualInt(0x8180, from_hex(e + 14, 8) & 0xffc0); /* Mode */
#else
	assertEqualInt(0x81a4, from_hex(e + 14, 8)); /* Mode */
#endif
	assertEqualInt(from_hex(e + 22, 8), uid); /* uid */
	assertEqualInt(gid, from_hex(e + 30, 8)); /* gid */
	assertEqualMem(e + 38, "00000003", 8); /* nlink */
	t2 = from_hex(e + 46, 8); /* mtime */
	failure("First entry created at t=%#08jx this entry created at"
	    "t2=%#08jx", (uintmax_t)t, (uintmax_t)t2);
	assert(t2 == t || t2 == t + 1); /* Almost same as first entry. */
	assertEqualInt(10, from_hex(e + 54, 8)); /* File size */
	fs = (uint64_t)from_hex(e + 54, 8);
	fs += PAD(fs, 4);
	assertEqualInt(devmajor, from_hex(e + 62, 8)); /* devmajor */
	assertEqualInt(devminor, from_hex(e + 70, 8)); /* devminor */
	assert(is_hex(e + 78, 8)); /* rdevmajor */
	assert(is_hex(e + 86, 8)); /* rdevminor */
	assertEqualMem(e + 94, "00000009", 8); /* Name size */
	ns = (uint64_t)from_hex(e + 94, 8);
	ns += PAD(ns + 2, 4);
	assertEqualInt(0, from_hex(e + 102, 8)); /* check field */
	assertEqualMem(e + 110, "hardlink\0\0", 10); /* Name contents */
	assertEqualMem(e + 110 + ns, "1234567890\0\0", 12); /* File contents */
	e += 110 + ns + fs;

	/* Last entry is end-of-archive marker. */
	assert(is_hex(e, 110));
	assertEqualMem(e + 0, "070701", 6); /* Magic */
	assertEqualMem(e + 8, "00000000", 8); /* ino */
	assertEqualMem(e + 14, "00000000", 8); /* mode */
	assertEqualMem(e + 22, "00000000", 8); /* uid */
	assertEqualMem(e + 30, "00000000", 8); /* gid */
	assertEqualMem(e + 38, "00000001", 8); /* nlink */
	assertEqualMem(e + 46, "00000000", 8); /* mtime */
	assertEqualMem(e + 54, "00000000", 8); /* size */
	assertEqualMem(e + 62, "00000000", 8); /* devmajor */
	assertEqualMem(e + 70, "00000000", 8); /* devminor */
	assertEqualMem(e + 78, "00000000", 8); /* rdevmajor */
	assertEqualMem(e + 86, "00000000", 8); /* rdevminor */
	assertEqualInt(11, from_hex(e + 94, 8)); /* name size */
	assertEqualMem(e + 102, "00000000", 8); /* check field */
	assertEqualMem(e + 110, "TRAILER!!!\0\0", 12); /* Name */

	free(p);
}
