/*

 * Copyright (C) the libgit2 contributors. All rights reserved.

 *

 * This file is part of libgit2, distributed under the GNU GPL v2 with

 * a Linking Exception. For full terms see the included COPYING file.

 */

#include "common.h"

#include "fileops.h"

#include "global.h"

#include "strmap.h"

#include <ctype.h>

#if GIT_WIN32

#include "win32/findfile.h"

#endif

int git_futils_mkpath2file(const char *file_path, const mode_t mode)

{

	return git_futils_mkdir(

		file_path, mode,

		GIT_MKDIR_PATH | GIT_MKDIR_SKIP_LAST | GIT_MKDIR_VERIFY_DIR);

}

int git_futils_mktmp(git_buf *path_out, const char *filename, mode_t mode)

{

	int fd;

	mode_t mask;

	p_umask(mask = p_umask(0));

	git_buf_sets(path_out, filename);

	git_buf_puts(path_out, "_git2_XXXXXX");

	if (git_buf_oom(path_out))

		return -1;

	if ((fd = p_mkstemp(path_out->ptr)) < 0) {

		giterr_set(GITERR_OS,

			"failed to create temporary file '%s'", path_out->ptr);

		return -1;

	}

	if (p_chmod(path_out->ptr, (mode & ~mask))) {

		giterr_set(GITERR_OS,

			"failed to set permissions on file '%s'", path_out->ptr);

		return -1;

	}

	return fd;

}

int git_futils_creat_withpath(const char *path, const mode_t dirmode, const mode_t mode)

{

	int fd;

	if (git_futils_mkpath2file(path, dirmode) < 0)

		return -1;

	fd = p_creat(path, mode);

	if (fd < 0) {

		giterr_set(GITERR_OS, "failed to create file '%s'", path);

		return -1;

	}

	return fd;

}

int git_futils_creat_locked(const char *path, const mode_t mode)

{

	int fd = p_open(path, O_WRONLY | O_CREAT | O_EXCL | O_BINARY | O_CLOEXEC,

		mode);

	if (fd < 0) {

		int error = errno;

		giterr_set(GITERR_OS, "failed to create locked file '%s'", path);

		switch (error) {

		case EEXIST:

			return GIT_ELOCKED;

		case ENOENT:

			return GIT_ENOTFOUND;

		default:

			return -1;

		}

	}

	return fd;

}

int git_futils_creat_locked_withpath(const char *path, const mode_t dirmode, const mode_t mode)

{

	if (git_futils_mkpath2file(path, dirmode) < 0)

		return -1;

	return git_futils_creat_locked(path, mode);

}

int git_futils_open_ro(const char *path)

{

	int fd = p_open(path, O_RDONLY);

	if (fd < 0)

		return git_path_set_error(errno, path, "open");

	return fd;

}

git_off_t git_futils_filesize(git_file fd)

{

	struct stat sb;

	if (p_fstat(fd, &sb)) {

		giterr_set(GITERR_OS, "failed to stat file descriptor");

		return -1;

	}

	return sb.st_size;

}

mode_t git_futils_canonical_mode(mode_t raw_mode)

{

	if (S_ISREG(raw_mode))

		return S_IFREG | GIT_PERMS_CANONICAL(raw_mode);

	else if (S_ISLNK(raw_mode))

		return S_IFLNK;

	else if (S_ISGITLINK(raw_mode))

		return S_IFGITLINK;

	else if (S_ISDIR(raw_mode))

		return S_IFDIR;

	else

		return 0;

}

int git_futils_readbuffer_fd(git_buf *buf, git_file fd, size_t len)

{

	ssize_t read_size = 0;

	size_t alloc_len;

	git_buf_clear(buf);

	if (!git__is_ssizet(len)) {

		giterr_set(GITERR_INVALID, "read too large");

		return -1;

	}

	GITERR_CHECK_ALLOC_ADD(&alloc_len, len, 1);

	if (git_buf_grow(buf, alloc_len) < 0)

		return -1;

	/* p_read loops internally to read len bytes */

	read_size = p_read(fd, buf->ptr, len);

	if (read_size != (ssize_t)len) {

		giterr_set(GITERR_OS, "failed to read descriptor");

		git_buf_free(buf);

		return -1;

	}

	buf->ptr[read_size] = '\0';

	buf->size = read_size;

	return 0;

}

int git_futils_readbuffer_updated(

	git_buf *out, const char *path, git_oid *checksum, int *updated)

{

	int error;

	git_file fd;

	struct stat st;

	git_buf buf = GIT_BUF_INIT;

	git_oid checksum_new;

	assert(out && path && *path);

	if (updated != NULL)

		*updated = 0;

	if (p_stat(path, &st) < 0)

		return git_path_set_error(errno, path, "stat");

	if (S_ISDIR(st.st_mode)) {

		giterr_set(GITERR_INVALID, "requested file is a directory");

		return GIT_ENOTFOUND;

	}

	if (!git__is_sizet(st.st_size+1)) {

		giterr_set(GITERR_OS, "invalid regular file stat for '%s'", path);

		return -1;

	}

	if ((fd = git_futils_open_ro(path)) < 0)

		return fd;

	if (git_futils_readbuffer_fd(&buf, fd, (size_t)st.st_size) < 0) {

		p_close(fd);

		return -1;

	}

	p_close(fd);

	if (checksum) {

		if ((error = git_hash_buf(&checksum_new, buf.ptr, buf.size)) < 0) {

			git_buf_free(&buf;;

			return error;

		}

		/*

		 * If we were given a checksum, we only want to use it if it's different

		 */

		if (!git_oid__cmp(checksum, &checksum_new)) {

			git_buf_free(&buf;;

			if (updated)

				*updated = 0;

			return 0;

		}

		git_oid_cpy(checksum, &checksum_new);

	}

	/*

	 * If we're here, the file did change, or the user didn't have an old version

	 */

	if (updated != NULL)

		*updated = 1;

	git_buf_swap(out, &buf;;

	git_buf_free(&buf;;

	return 0;

}

int git_futils_readbuffer(git_buf *buf, const char *path)

{

	return git_futils_readbuffer_updated(buf, path, NULL, NULL);

}

int git_futils_writebuffer(

	const git_buf *buf,	const char *path, int flags, mode_t mode)

{

	int fd, do_fsync = 0, error = 0;

	if (!flags)

		flags = O_CREAT | O_TRUNC | O_WRONLY;

	if ((flags & O_FSYNC) != 0)

		do_fsync = 1;

	flags &= ~O_FSYNC;

	if (!mode)

		mode = GIT_FILEMODE_BLOB;

	if ((fd = p_open(path, flags, mode)) < 0) {

		giterr_set(GITERR_OS, "could not open '%s' for writing", path);

		return fd;

	}

	if ((error = p_write(fd, git_buf_cstr(buf), git_buf_len(buf))) < 0) {

		giterr_set(GITERR_OS, "could not write to '%s'", path);

		(void)p_close(fd);

		return error;

	}

	if (do_fsync && (error = p_fsync(fd)) < 0) {

		giterr_set(GITERR_OS, "could not fsync '%s'", path);

		p_close(fd);

		return error;

	}

	if ((error = p_close(fd)) < 0) {

		giterr_set(GITERR_OS, "error while closing '%s'", path);

		return error;

	}

	if (do_fsync && (flags & O_CREAT))

		error = git_futils_fsync_parent(path);

	return error;

}

int git_futils_mv_withpath(const char *from, const char *to, const mode_t dirmode)

{

	if (git_futils_mkpath2file(to, dirmode) < 0)

		return -1;

	if (p_rename(from, to) < 0) {

		giterr_set(GITERR_OS, "failed to rename '%s' to '%s'", from, to);

		return -1;

	}

	return 0;

}

int git_futils_mmap_ro(git_map *out, git_file fd, git_off_t begin, size_t len)

{

	return p_mmap(out, len, GIT_PROT_READ, GIT_MAP_SHARED, fd, begin);

}

int git_futils_mmap_ro_file(git_map *out, const char *path)

{

	git_file fd = git_futils_open_ro(path);

	git_off_t len;

	int result;

	if (fd < 0)

		return fd;

	if ((len = git_futils_filesize(fd)) < 0) {

		result = -1;

		goto out;

	}

	if (!git__is_sizet(len)) {

		giterr_set(GITERR_OS, "file `%s` too large to mmap", path);

		result = -1;

		goto out;

	}

	result = git_futils_mmap_ro(out, fd, 0, (size_t)len);

out:

	p_close(fd);

	return result;

}

void git_futils_mmap_free(git_map *out)

{

	p_munmap(out);

}

GIT_INLINE(int) mkdir_validate_dir(

	const char *path,

	struct stat *st,

	mode_t mode,

	uint32_t flags,

	struct git_futils_mkdir_options *opts)

{

	/* with exclusive create, existing dir is an error */

	if ((flags & GIT_MKDIR_EXCL) != 0) {

		giterr_set(GITERR_FILESYSTEM,

			"failed to make directory '%s': directory exists", path);

		return GIT_EEXISTS;

	}

	if ((S_ISREG(st->st_mode) && (flags & GIT_MKDIR_REMOVE_FILES)) ||

		(S_ISLNK(st->st_mode) && (flags & GIT_MKDIR_REMOVE_SYMLINKS))) {

		if (p_unlink(path) < 0) {

			giterr_set(GITERR_OS, "failed to remove %s '%s'",

				S_ISLNK(st->st_mode) ? "symlink" : "file", path);

			return GIT_EEXISTS;

		}

		opts->perfdata.mkdir_calls++;

		if (p_mkdir(path, mode) < 0) {

			giterr_set(GITERR_OS, "failed to make directory '%s'", path);

			return GIT_EEXISTS;

		}

	}

	else if (S_ISLNK(st->st_mode)) {

		/* Re-stat the target, make sure it's a directory */

		opts->perfdata.stat_calls++;

		if (p_stat(path, st) < 0) {

			giterr_set(GITERR_OS, "failed to make directory '%s'", path);

			return GIT_EEXISTS;

		}

	}

	else if (!S_ISDIR(st->st_mode)) {

		giterr_set(GITERR_FILESYSTEM,

			"failed to make directory '%s': directory exists", path);

		return GIT_EEXISTS;

	}

	return 0;

}

GIT_INLINE(int) mkdir_validate_mode(

	const char *path,

	struct stat *st,

	bool terminal_path,

	mode_t mode,

	uint32_t flags,

	struct git_futils_mkdir_options *opts)

{

	if (((terminal_path && (flags & GIT_MKDIR_CHMOD) != 0) ||

		(flags & GIT_MKDIR_CHMOD_PATH) != 0) && st->st_mode != mode) {

		opts->perfdata.chmod_calls++;

		if (p_chmod(path, mode) < 0) {

			giterr_set(GITERR_OS, "failed to set permissions on '%s'", path);

			return -1;

		}

	}

	return 0;

}

GIT_INLINE(int) mkdir_canonicalize(

	git_buf *path,

	uint32_t flags)

{

	ssize_t root_len;

	if (path->size == 0) {

		giterr_set(GITERR_OS, "attempt to create empty path");

		return -1;

	}

	/* Trim trailing slashes (except the root) */

	if ((root_len = git_path_root(path->ptr)) < 0)

		root_len = 0;

	else

		root_len++;

	while (path->size > (size_t)root_len && path->ptr[path->size - 1] == '/')

		path->ptr[--path->size] = '\0';

	/* if we are not supposed to made the last element, truncate it */

	if ((flags & GIT_MKDIR_SKIP_LAST2) != 0) {

		git_path_dirname_r(path, path->ptr);

		flags |= GIT_MKDIR_SKIP_LAST;

	}

	if ((flags & GIT_MKDIR_SKIP_LAST) != 0) {

		git_path_dirname_r(path, path->ptr);

	}

	/* We were either given the root path (or trimmed it to

	* the root), we don't have anything to do.

	*/

	if (path->size <= (size_t)root_len)

		git_buf_clear(path);

	return 0;

}

int git_futils_mkdir(

	const char *path,

	mode_t mode,

	uint32_t flags)

{

	git_buf make_path = GIT_BUF_INIT, parent_path = GIT_BUF_INIT;

	const char *relative;

	struct git_futils_mkdir_options opts = { 0 };

	struct stat st;

	size_t depth = 0;

	int len = 0, root_len, error;

	if ((error = git_buf_puts(&make_path, path)) < 0 ||

		(error = mkdir_canonicalize(&make_path, flags)) < 0 ||

		(error = git_buf_puts(&parent_path, make_path.ptr)) < 0 ||

		make_path.size == 0)

		goto done;

	root_len = git_path_root(make_path.ptr);

	/* find the first parent directory that exists.  this will be used

	 * as the base to dirname_relative.

	 */

	for (relative = make_path.ptr; parent_path.size; ) {

		error = p_lstat(parent_path.ptr, &st);

		if (error == 0) {

			break;

		} else if (errno != ENOENT) {

			giterr_set(GITERR_OS, "failed to stat '%s'", parent_path.ptr);

			goto done;

		}

		depth++;

		/* examine the parent of the current path */

		if ((len = git_path_dirname_r(&parent_path, parent_path.ptr)) < 0) {

			error = len;

			goto done;

		}

		assert(len);

		/* we've walked all the given path's parents and it's either relative

		 * or rooted.  either way, give up and make the entire path.

		 */

		if ((len == 1 && parent_path.ptr[0] == '.') || len == root_len+1) {

			relative = make_path.ptr;

			break;

		}

		relative = make_path.ptr + len + 1;

		/* not recursive? just make this directory relative to its parent. */

		if ((flags & GIT_MKDIR_PATH) == 0)

			break;

	}

	/* we found an item at the location we're trying to create,

	 * validate it.

	 */

	if (depth == 0) {

		error = mkdir_validate_dir(make_path.ptr, &st, mode, flags, &opts);

		if (!error)

			error = mkdir_validate_mode(

				make_path.ptr, &st, true, mode, flags, &opts);

		goto done;

	}

	/* we already took `SKIP_LAST` and `SKIP_LAST2` into account when

	 * canonicalizing `make_path`.

	 */

	flags &= ~(GIT_MKDIR_SKIP_LAST2 | GIT_MKDIR_SKIP_LAST);

	error = git_futils_mkdir_relative(relative,

		parent_path.size ? parent_path.ptr : NULL, mode, flags, &opts);

done:

	git_buf_free(&make_path);

	git_buf_free(&parent_path);

	return error;

}

int git_futils_mkdir_r(const char *path, const mode_t mode)

{

	return git_futils_mkdir(path, mode, GIT_MKDIR_PATH);

}

int git_futils_mkdir_relative(

	const char *relative_path,

	const char *base,

	mode_t mode,

	uint32_t flags,

	struct git_futils_mkdir_options *opts)

{

	git_buf make_path = GIT_BUF_INIT;

	ssize_t root = 0, min_root_len;

	char lastch = '/', *tail;

	struct stat st;

	struct git_futils_mkdir_options empty_opts = {0};

	int error;

	if (!opts)

		opts = &empty_opts;

	/* build path and find "root" where we should start calling mkdir */

	if (git_path_join_unrooted(&make_path, relative_path, base, &root) < 0)

		return -1;

	if ((error = mkdir_canonicalize(&make_path, flags)) < 0 ||

		make_path.size == 0)

		goto done;

	/* if we are not supposed to make the whole path, reset root */

	if ((flags & GIT_MKDIR_PATH) == 0)

		root = git_buf_rfind(&make_path, '/');

	/* advance root past drive name or network mount prefix */

	min_root_len = git_path_root(make_path.ptr);

	if (root < min_root_len)

		root = min_root_len;

	while (root >= 0 && make_path.ptr[root] == '/')

		++root;

	/* clip root to make_path length */

	if (root > (ssize_t)make_path.size)

		root = (ssize_t)make_path.size; /* i.e. NUL byte of string */

	if (root < 0)

		root = 0;

	/* walk down tail of path making each directory */

	for (tail = &make_path.ptr[root]; *tail; *tail = lastch) {

		bool mkdir_attempted = false;

		/* advance tail to include next path component */

		while (*tail == '/')

			tail++;

		while (*tail && *tail != '/')

			tail++;

		/* truncate path at next component */

		lastch = *tail;

		*tail = '\0';

		st.st_mode = 0;

		if (opts->dir_map && git_strmap_exists(opts->dir_map, make_path.ptr))

			continue;

		/* See what's going on with this path component */

		opts->perfdata.stat_calls++;

retry_lstat:

		if (p_lstat(make_path.ptr, &st) < 0) {

			if (mkdir_attempted || errno != ENOENT) {

				giterr_set(GITERR_OS, "cannot access component in path '%s'", make_path.ptr);

				error = -1;

				goto done;

			}

			giterr_clear();

			opts->perfdata.mkdir_calls++;

			mkdir_attempted = true;

			if (p_mkdir(make_path.ptr, mode) < 0) {

				if (errno == EEXIST)

					goto retry_lstat;

				giterr_set(GITERR_OS, "failed to make directory '%s'", make_path.ptr);

				error = -1;

				goto done;

			}

		} else {

			if ((error = mkdir_validate_dir(

				make_path.ptr, &st, mode, flags, opts)) < 0)

				goto done;

		}

		/* chmod if requested and necessary */

		if ((error = mkdir_validate_mode(

			make_path.ptr, &st, (lastch == '\0'), mode, flags, opts)) < 0)

			goto done;

		if (opts->dir_map && opts->pool) {

			char *cache_path;

			size_t alloc_size;

			GITERR_CHECK_ALLOC_ADD(&alloc_size, make_path.size, 1);

			if (!git__is_uint32(alloc_size))

				return -1;

			cache_path = git_pool_malloc(opts->pool, (uint32_t)alloc_size);

			GITERR_CHECK_ALLOC(cache_path);

			memcpy(cache_path, make_path.ptr, make_path.size + 1);

			git_strmap_insert(opts->dir_map, cache_path, cache_path, &error);

			if (error < 0)

				goto done;

		}

	}

	error = 0;

	/* check that full path really is a directory if requested & needed */

	if ((flags & GIT_MKDIR_VERIFY_DIR) != 0 &&

		lastch != '\0') {

		opts->perfdata.stat_calls++;

		if (p_stat(make_path.ptr, &st) < 0 || !S_ISDIR(st.st_mode)) {

			giterr_set(GITERR_OS, "path is not a directory '%s'",

				make_path.ptr);

			error = GIT_ENOTFOUND;

		}

	}

done:

	git_buf_free(&make_path);

	return error;

}

typedef struct {

	const char *base;

	size_t baselen;

	uint32_t flags;

	int depth;

} futils__rmdir_data;

#define FUTILS_MAX_DEPTH 100

static int futils__error_cannot_rmdir(const char *path, const char *filemsg)

{

	if (filemsg)

		giterr_set(GITERR_OS, "could not remove directory '%s': %s",

				   path, filemsg);

	else

		giterr_set(GITERR_OS, "could not remove directory '%s'", path);

	return -1;

}

static int futils__rm_first_parent(git_buf *path, const char *ceiling)

{

	int error = GIT_ENOTFOUND;

	struct stat st;

	while (error == GIT_ENOTFOUND) {

		git_buf_rtruncate_at_char(path, '/');

		if (!path->size || git__prefixcmp(path->ptr, ceiling) != 0)

			error = 0;

		else if (p_lstat_posixly(path->ptr, &st) == 0) {

			if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode))

				error = p_unlink(path->ptr);

			else if (!S_ISDIR(st.st_mode))

				error = -1; /* fail to remove non-regular file */

		} else if (errno != ENOTDIR)

			error = -1;

	}

	if (error)

		futils__error_cannot_rmdir(path->ptr, "cannot remove parent");

	return error;

}

static int futils__rmdir_recurs_foreach(void *opaque, git_buf *path)

{

	int error = 0;

	futils__rmdir_data *data = opaque;

	struct stat st;

	if (data->depth > FUTILS_MAX_DEPTH)

		error = futils__error_cannot_rmdir(

			path->ptr, "directory nesting too deep");

	else if ((error = p_lstat_posixly(path->ptr, &st)) < 0) {

		if (errno == ENOENT)

			error = 0;

		else if (errno == ENOTDIR) {

			/* asked to remove a/b/c/d/e and a/b is a normal file */

			if ((data->flags & GIT_RMDIR_REMOVE_BLOCKERS) != 0)

				error = futils__rm_first_parent(path, data->base);

			else

				futils__error_cannot_rmdir(

					path->ptr, "parent is not directory");

		}

		else

			error = git_path_set_error(errno, path->ptr, "rmdir");

	}

	else if (S_ISDIR(st.st_mode)) {

		data->depth++;

		error = git_path_direach(path, 0, futils__rmdir_recurs_foreach, data);

		data->depth--;

		if (error < 0)

			return error;

		if (data->depth == 0 && (data->flags & GIT_RMDIR_SKIP_ROOT) != 0)

			return error;

		if ((error = p_rmdir(path->ptr)) < 0) {

			if ((data->flags & GIT_RMDIR_SKIP_NONEMPTY) != 0 &&

				(errno == ENOTEMPTY || errno == EEXIST || errno == EBUSY))

				error = 0;

			else

				error = git_path_set_error(errno, path->ptr, "rmdir");

		}

	}

	else if ((data->flags & GIT_RMDIR_REMOVE_FILES) != 0) {

		if (p_unlink(path->ptr) < 0)

			error = git_path_set_error(errno, path->ptr, "remove");

	}

	else if ((data->flags & GIT_RMDIR_SKIP_NONEMPTY) == 0)

		error = futils__error_cannot_rmdir(path->ptr, "still present");

	return error;

}

static int futils__rmdir_empty_parent(void *opaque, const char *path)

{

	futils__rmdir_data *data = opaque;

	int error = 0;

	if (strlen(path) <= data->baselen)

		error = GIT_ITEROVER;

	else if (p_rmdir(path) < 0) {

		int en = errno;

		if (en == ENOENT || en == ENOTDIR) {

			/* do nothing */

		} else if ((data->flags & GIT_RMDIR_SKIP_NONEMPTY) == 0 &&

			en == EBUSY) {

			error = git_path_set_error(errno, path, "rmdir");

		} else if (en == ENOTEMPTY || en == EEXIST || en == EBUSY) {

			error = GIT_ITEROVER;

		} else {

			error = git_path_set_error(errno, path, "rmdir");

		}

	}

	return error;

}

int git_futils_rmdir_r(

	const char *path, const char *base, uint32_t flags)

{

	int error;

	git_buf fullpath = GIT_BUF_INIT;

	futils__rmdir_data data;

	/* build path and find "root" where we should start calling mkdir */

	if (git_path_join_unrooted(&fullpath, path, base, NULL) < 0)

		return -1;

	memset(&data, 0, sizeof(data));

	data.base    = base ? base : "";

	data.baselen = base ? strlen(base) : 0;

	data.flags   = flags;

	error = futils__rmdir_recurs_foreach(&data, &fullpath);

	/* remove now-empty parents if requested */

	if (!error && (flags & GIT_RMDIR_EMPTY_PARENTS) != 0)

		error = git_path_walk_up(

			&fullpath, base, futils__rmdir_empty_parent, &data);

	if (error == GIT_ITEROVER) {

		giterr_clear();

		error = 0;

	}

	git_buf_free(&fullpath);

	return error;

}

int git_futils_fake_symlink(const char *old, const char *new)

{

	int retcode = GIT_ERROR;

	int fd = git_futils_creat_withpath(new, 0755, 0644);

	if (fd >= 0) {

		retcode = p_write(fd, old, strlen(old));

		p_close(fd);

	}

	return retcode;

}

static int cp_by_fd(int ifd, int ofd, bool close_fd_when_done)

{

	int error = 0;

	char buffer[FILEIO_BUFSIZE];

	ssize_t len = 0;

	while (!error && (len = p_read(ifd, buffer, sizeof(buffer))) > 0)

		/* p_write() does not have the same semantics as write().  It loops

		 * internally and will return 0 when it has completed writing.

		 */

		error = p_write(ofd, buffer, len);

	if (len < 0) {

		giterr_set(GITERR_OS, "read error while copying file");

		error = (int)len;

	}

	if (error < 0)

		giterr_set(GITERR_OS, "write error while copying file");

	if (close_fd_when_done) {

		p_close(ifd);

		p_close(ofd);

	}

	return error;

}

int git_futils_cp(const char *from, const char *to, mode_t filemode)

{

	int ifd, ofd;

	if ((ifd = git_futils_open_ro(from)) < 0)

		return ifd;

	if ((ofd = p_open(to, O_WRONLY | O_CREAT | O_EXCL, filemode)) < 0) {

		p_close(ifd);

		return git_path_set_error(errno, to, "open for writing");

	}

	return cp_by_fd(ifd, ofd, true);

}

int git_futils_touch(const char *path, time_t *when)

{

	struct p_timeval times[2];

	int ret;

	times[0].tv_sec =  times[1].tv_sec  = when ? *when : time(NULL);

	times[0].tv_usec = times[1].tv_usec = 0;