Source / Include Folder (#88)

Moved Source Files Into `src` Folder

1 files changed, 0 insertions, 376 deletions

diff --git a/stat.c b/stat.c
deleted file mode 100644
index 47e60b6..0000000
--- a/stat.c
+++ /dev/null
@@ -1,376 +0,0 @@
-/****************************************************************************
- * bfs                                                                      *
- * Copyright (C) 2018-2019 Tavian Barnes <tavianator@tavianator.com>        *
- *                                                                          *
- * Permission to use, copy, modify, and/or distribute this software for any *
- * purpose with or without fee is hereby granted.                           *
- *                                                                          *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES *
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF         *
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR  *
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES   *
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN    *
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF  *
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.           *
- ****************************************************************************/
-
-#include "stat.h"
-#include "util.h"
-#include <assert.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <stdbool.h>
-#include <string.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-
-#if BFS_HAS_SYS_PARAM
-#	include <sys/param.h>
-#endif
-
-#ifdef STATX_BASIC_STATS
-#	define HAVE_STATX true
-#elif __linux__
-#	include <linux/stat.h>
-#	include <sys/syscall.h>
-#	include <unistd.h>
-#endif
-
-#if HAVE_STATX || defined(__NR_statx)
-#	define HAVE_BFS_STATX true
-#endif
-
-#if __APPLE__
-#	define st_atim st_atimespec
-#	define st_ctim st_ctimespec
-#	define st_mtim st_mtimespec
-#	define st_birthtim st_birthtimespec
-#endif
-
-const char *bfs_stat_field_name(enum bfs_stat_field field) {
-	switch (field) {
-	case BFS_STAT_DEV:
-		return "device number";
-	case BFS_STAT_INO:
-		return "inode nunmber";
-	case BFS_STAT_TYPE:
-		return "type";
-	case BFS_STAT_MODE:
-		return "mode";
-	case BFS_STAT_NLINK:
-		return "link count";
-	case BFS_STAT_GID:
-		return "group ID";
-	case BFS_STAT_UID:
-		return "user ID";
-	case BFS_STAT_SIZE:
-		return "size";
-	case BFS_STAT_BLOCKS:
-		return "block count";
-	case BFS_STAT_RDEV:
-		return "underlying device";
-	case BFS_STAT_ATTRS:
-		return "attributes";
-	case BFS_STAT_ATIME:
-		return "access time";
-	case BFS_STAT_BTIME:
-		return "birth time";
-	case BFS_STAT_CTIME:
-		return "change time";
-	case BFS_STAT_MTIME:
-		return "modification time";
-	}
-
-	assert(!"Unrecognized stat field");
-	return "???";
-}
-
-/**
- * Check if we should retry a failed stat() due to a potentially broken link.
- */
-static bool bfs_stat_retry(int ret, enum bfs_stat_flags flags) {
-	return ret != 0
-		&& (flags & (BFS_STAT_NOFOLLOW | BFS_STAT_TRYFOLLOW)) == BFS_STAT_TRYFOLLOW
-		&& is_nonexistence_error(errno);
-}
-
-/**
- * Convert a struct stat to a struct bfs_stat.
- */
-static void bfs_stat_convert(const struct stat *statbuf, struct bfs_stat *buf) {
-	buf->mask = 0;
-
-	buf->dev = statbuf->st_dev;
-	buf->mask |= BFS_STAT_DEV;
-
-	buf->ino = statbuf->st_ino;
-	buf->mask |= BFS_STAT_INO;
-
-	buf->mode = statbuf->st_mode;
-	buf->mask |= BFS_STAT_TYPE | BFS_STAT_MODE;
-
-	buf->nlink = statbuf->st_nlink;
-	buf->mask |= BFS_STAT_NLINK;
-
-	buf->gid = statbuf->st_gid;
-	buf->mask |= BFS_STAT_GID;
-
-	buf->uid = statbuf->st_uid;
-	buf->mask |= BFS_STAT_UID;
-
-	buf->size = statbuf->st_size;
-	buf->mask |= BFS_STAT_SIZE;
-
-	buf->blocks = statbuf->st_blocks;
-	buf->mask |= BFS_STAT_BLOCKS;
-
-	buf->rdev = statbuf->st_rdev;
-	buf->mask |= BFS_STAT_RDEV;
-
-#if BSD
-	buf->attrs = statbuf->st_flags;
-	buf->mask |= BFS_STAT_ATTRS;
-#endif
-
-	buf->atime = statbuf->st_atim;
-	buf->mask |= BFS_STAT_ATIME;
-
-	buf->ctime = statbuf->st_ctim;
-	buf->mask |= BFS_STAT_CTIME;
-
-	buf->mtime = statbuf->st_mtim;
-	buf->mask |= BFS_STAT_MTIME;
-
-#if __APPLE__ || __FreeBSD__ || __NetBSD__
-	buf->btime = statbuf->st_birthtim;
-	buf->mask |= BFS_STAT_BTIME;
-#endif
-}
-
-/**
- * bfs_stat() implementation backed by stat().
- */
-static int bfs_stat_impl(int at_fd, const char *at_path, int at_flags, enum bfs_stat_flags flags, struct bfs_stat *buf) {
-	struct stat statbuf;
-	int ret = fstatat(at_fd, at_path, &statbuf, at_flags);
-
-	if (bfs_stat_retry(ret, flags)) {
-		at_flags |= AT_SYMLINK_NOFOLLOW;
-		ret = fstatat(at_fd, at_path, &statbuf, at_flags);
-	}
-
-	if (ret == 0) {
-		bfs_stat_convert(&statbuf, buf);
-	}
-
-	return ret;
-}
-
-#if HAVE_BFS_STATX
-
-/**
- * Wrapper for the statx() system call, which had no glibc wrapper prior to 2.28.
- */
-static int bfs_statx(int at_fd, const char *at_path, int at_flags, unsigned int mask, struct statx *buf) {
-#if BFS_HAS_FEATURE(memory_sanitizer, false)
-	// -fsanitize=memory doesn't know about statx(), so tell it the memory
-	// got initialized
-	memset(buf, 0, sizeof(*buf));
-#endif
-
-#if HAVE_STATX
-	return statx(at_fd, at_path, at_flags, mask, buf);
-#else
-	return syscall(__NR_statx, at_fd, at_path, at_flags, mask, buf);
-#endif
-}
-
-/**
- * bfs_stat() implementation backed by statx().
- */
-static int bfs_statx_impl(int at_fd, const char *at_path, int at_flags, enum bfs_stat_flags flags, struct bfs_stat *buf) {
-	unsigned int mask = STATX_BASIC_STATS | STATX_BTIME;
-	struct statx xbuf;
-	int ret = bfs_statx(at_fd, at_path, at_flags, mask, &xbuf);
-
-	if (bfs_stat_retry(ret, flags)) {
-		at_flags |= AT_SYMLINK_NOFOLLOW;
-		ret = bfs_statx(at_fd, at_path, at_flags, mask, &xbuf);
-	}
-
-	if (ret != 0) {
-		return ret;
-	}
-
-	// Callers shouldn't have to check anything except the times
-	const unsigned int guaranteed = STATX_BASIC_STATS ^ (STATX_ATIME | STATX_CTIME | STATX_MTIME);
-	if ((xbuf.stx_mask & guaranteed) != guaranteed) {
-		errno = ENOTSUP;
-		return -1;
-	}
-
-	buf->mask = 0;
-
-	buf->dev = bfs_makedev(xbuf.stx_dev_major, xbuf.stx_dev_minor);
-	buf->mask |= BFS_STAT_DEV;
-
-	if (xbuf.stx_mask & STATX_INO) {
-		buf->ino = xbuf.stx_ino;
-		buf->mask |= BFS_STAT_INO;
-	}
-
-	buf->mode = xbuf.stx_mode;
-	if (xbuf.stx_mask & STATX_TYPE) {
-		buf->mask |= BFS_STAT_TYPE;
-	}
-	if (xbuf.stx_mask & STATX_MODE) {
-		buf->mask |= BFS_STAT_MODE;
-	}
-
-	if (xbuf.stx_mask & STATX_NLINK) {
-		buf->nlink = xbuf.stx_nlink;
-		buf->mask |= BFS_STAT_NLINK;
-	}
-
-	if (xbuf.stx_mask & STATX_GID) {
-		buf->gid = xbuf.stx_gid;
-		buf->mask |= BFS_STAT_GID;
-	}
-
-	if (xbuf.stx_mask & STATX_UID) {
-		buf->uid = xbuf.stx_uid;
-		buf->mask |= BFS_STAT_UID;
-	}
-
-	if (xbuf.stx_mask & STATX_SIZE) {
-		buf->size = xbuf.stx_size;
-		buf->mask |= BFS_STAT_SIZE;
-	}
-
-	if (xbuf.stx_mask & STATX_BLOCKS) {
-		buf->blocks = xbuf.stx_blocks;
-		buf->mask |= BFS_STAT_BLOCKS;
-	}
-
-	buf->rdev = bfs_makedev(xbuf.stx_rdev_major, xbuf.stx_rdev_minor);
-	buf->mask |= BFS_STAT_RDEV;
-
-	buf->attrs = xbuf.stx_attributes;
-	buf->mask |= BFS_STAT_ATTRS;
-
-	if (xbuf.stx_mask & STATX_ATIME) {
-		buf->atime.tv_sec = xbuf.stx_atime.tv_sec;
-		buf->atime.tv_nsec = xbuf.stx_atime.tv_nsec;
-		buf->mask |= BFS_STAT_ATIME;
-	}
-
-	if (xbuf.stx_mask & STATX_BTIME) {
-		buf->btime.tv_sec = xbuf.stx_btime.tv_sec;
-		buf->btime.tv_nsec = xbuf.stx_btime.tv_nsec;
-		buf->mask |= BFS_STAT_BTIME;
-	}
-
-	if (xbuf.stx_mask & STATX_CTIME) {
-		buf->ctime.tv_sec = xbuf.stx_ctime.tv_sec;
-		buf->ctime.tv_nsec = xbuf.stx_ctime.tv_nsec;
-		buf->mask |= BFS_STAT_CTIME;
-	}
-
-	if (xbuf.stx_mask & STATX_MTIME) {
-		buf->mtime.tv_sec = xbuf.stx_mtime.tv_sec;
-		buf->mtime.tv_nsec = xbuf.stx_mtime.tv_nsec;
-		buf->mask |= BFS_STAT_MTIME;
-	}
-
-	return ret;
-}
-
-#endif // HAVE_BFS_STATX
-
-/**
- * Allows calling stat with custom at_flags.
- */
-static int bfs_stat_explicit(int at_fd, const char *at_path, int at_flags, enum bfs_stat_flags flags, struct bfs_stat *buf) {
-#if HAVE_BFS_STATX
-	static bool has_statx = true;
-
-	if (has_statx) {
-		int ret = bfs_statx_impl(at_fd, at_path, at_flags, flags, buf);
-		// EPERM is commonly returned in a seccomp() sandbox that does
-		// not allow statx()
-		if (ret != 0 && (errno == ENOSYS || errno == EPERM)) {
-			has_statx = false;
-		} else {
-			return ret;
-		}
-	}
-#endif
-
-	return bfs_stat_impl(at_fd, at_path, at_flags, flags, buf);
-}
-
-int bfs_stat(int at_fd, const char *at_path, enum bfs_stat_flags flags, struct bfs_stat *buf) {
-	int at_flags = 0;
-	if (flags & BFS_STAT_NOFOLLOW) {
-		at_flags |= AT_SYMLINK_NOFOLLOW;
-	}
-
-#ifdef AT_STATX_DONT_SYNC
-	if (flags & BFS_STAT_NOSYNC) {
-		at_flags |= AT_STATX_DONT_SYNC;
-	}
-#endif
-
-	if (at_path) {
-		return bfs_stat_explicit(at_fd, at_path, at_flags, flags, buf);
-	}
-
-	// Check __GNU__ to work around https://lists.gnu.org/archive/html/bug-hurd/2021-12/msg00001.html
-#if defined(AT_EMPTY_PATH) && !__GNU__
-	static bool has_at_ep = true;
-	if (has_at_ep) {
-		at_flags |= AT_EMPTY_PATH;
-		int ret = bfs_stat_explicit(at_fd, "", at_flags, flags, buf);
-		if (ret != 0 && errno == EINVAL) {
-			has_at_ep = false;
-		} else {
-			return ret;
-		}
-	}
-#endif
-
-	struct stat statbuf;
-	if (fstat(at_fd, &statbuf) == 0) {
-		bfs_stat_convert(&statbuf, buf);
-		return 0;
-	} else {
-		return -1;
-	}
-}
-
-const struct timespec *bfs_stat_time(const struct bfs_stat *buf, enum bfs_stat_field field) {
-	if (!(buf->mask & field)) {
-		errno = ENOTSUP;
-		return NULL;
-	}
-
-	switch (field) {
-	case BFS_STAT_ATIME:
-		return &buf->atime;
-	case BFS_STAT_BTIME:
-		return &buf->btime;
-	case BFS_STAT_CTIME:
-		return &buf->ctime;
-	case BFS_STAT_MTIME:
-		return &buf->mtime;
-	default:
-		assert(!"Invalid stat field for time");
-		errno = EINVAL;
-		return NULL;
-	}
-}
-
-void bfs_stat_id(const struct bfs_stat *buf, bfs_file_id *id) {
-	memcpy(*id, &buf->dev, sizeof(buf->dev));
-	memcpy(*id + sizeof(buf->dev), &buf->ino, sizeof(buf->ino));
-}