summaryrefslogtreecommitdiff
path: root/example/passthrough.c
diff options
context:
space:
mode:
Diffstat (limited to 'example/passthrough.c')
-rw-r--r--example/passthrough.c531
1 files changed, 0 insertions, 531 deletions
diff --git a/example/passthrough.c b/example/passthrough.c
deleted file mode 100644
index 6de9fc1..0000000
--- a/example/passthrough.c
+++ /dev/null
@@ -1,531 +0,0 @@
-/*
- FUSE: Filesystem in Userspace
- Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu>
- Copyright (C) 2011 Sebastian Pipping <sebastian@pipping.org>
-
- This program can be distributed under the terms of the GNU GPL.
- See the file COPYING.
-*/
-
-/** @file
- *
- * This file system mirrors the existing file system hierarchy of the
- * system, starting at the root file system. This is implemented by
- * just "passing through" all requests to the corresponding user-space
- * libc functions. Its performance is terrible.
- *
- * Compile with
- *
- * gcc -Wall passthrough.c `pkg-config fuse3 --cflags --libs` -o passthrough
- *
- * ## Source code ##
- * \include passthrough.c
- */
-
-
-#define FUSE_USE_VERSION 31
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#define _GNU_SOURCE
-
-#ifdef linux
-/* For pread()/pwrite()/utimensat() */
-#define _XOPEN_SOURCE 700
-#endif
-
-#include <fuse.h>
-#include <stdio.h>
-#include <string.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <sys/stat.h>
-#include <dirent.h>
-#include <errno.h>
-#ifdef __FreeBSD__
-#include <sys/socket.h>
-#include <sys/un.h>
-#endif
-#include <sys/time.h>
-#ifdef HAVE_SETXATTR
-#include <sys/xattr.h>
-#endif
-
-#include "passthrough_helpers.h"
-
-static void *xmp_init(struct fuse_conn_info *conn,
- struct fuse_config *cfg)
-{
- (void) conn;
- cfg->use_ino = 1;
-
- /* Pick up changes from lower filesystem right away. This is
- also necessary for better hardlink support. When the kernel
- calls the unlink() handler, it does not know the inode of
- the to-be-removed entry and can therefore not invalidate
- the cache of the associated inode - resulting in an
- incorrect st_nlink value being reported for any remaining
- hardlinks to this inode. */
- cfg->entry_timeout = 0;
- cfg->attr_timeout = 0;
- cfg->negative_timeout = 0;
-
- return NULL;
-}
-
-static int xmp_getattr(const char *path, struct stat *stbuf,
- struct fuse_file_info *fi)
-{
- (void) fi;
- int res;
-
- res = lstat(path, stbuf);
- if (res == -1)
- return -errno;
-
- return 0;
-}
-
-static int xmp_access(const char *path, int mask)
-{
- int res;
-
- res = access(path, mask);
- if (res == -1)
- return -errno;
-
- return 0;
-}
-
-static int xmp_readlink(const char *path, char *buf, size_t size)
-{
- int res;
-
- res = readlink(path, buf, size - 1);
- if (res == -1)
- return -errno;
-
- buf[res] = '\0';
- return 0;
-}
-
-
-static int xmp_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
- off_t offset, struct fuse_file_info *fi,
- enum fuse_readdir_flags flags)
-{
- DIR *dp;
- struct dirent *de;
-
- (void) offset;
- (void) fi;
- (void) flags;
-
- dp = opendir(path);
- if (dp == NULL)
- return -errno;
-
- while ((de = readdir(dp)) != NULL) {
- struct stat st;
- memset(&st, 0, sizeof(st));
- st.st_ino = de->d_ino;
- st.st_mode = de->d_type << 12;
- if (filler(buf, de->d_name, &st, 0, 0))
- break;
- }
-
- closedir(dp);
- return 0;
-}
-
-static int xmp_mknod(const char *path, mode_t mode, dev_t rdev)
-{
- int res;
-
- res = mknod_wrapper(AT_FDCWD, path, NULL, mode, rdev);
- if (res == -1)
- return -errno;
-
- return 0;
-}
-
-static int xmp_mkdir(const char *path, mode_t mode)
-{
- int res;
-
- res = mkdir(path, mode);
- if (res == -1)
- return -errno;
-
- return 0;
-}
-
-static int xmp_unlink(const char *path)
-{
- int res;
-
- res = unlink(path);
- if (res == -1)
- return -errno;
-
- return 0;
-}
-
-static int xmp_rmdir(const char *path)
-{
- int res;
-
- res = rmdir(path);
- if (res == -1)
- return -errno;
-
- return 0;
-}
-
-static int xmp_symlink(const char *from, const char *to)
-{
- int res;
-
- res = symlink(from, to);
- if (res == -1)
- return -errno;
-
- return 0;
-}
-
-static int xmp_rename(const char *from, const char *to, unsigned int flags)
-{
- int res;
-
- if (flags)
- return -EINVAL;
-
- res = rename(from, to);
- if (res == -1)
- return -errno;
-
- return 0;
-}
-
-static int xmp_link(const char *from, const char *to)
-{
- int res;
-
- res = link(from, to);
- if (res == -1)
- return -errno;
-
- return 0;
-}
-
-static int xmp_chmod(const char *path, mode_t mode,
- struct fuse_file_info *fi)
-{
- (void) fi;
- int res;
-
- res = chmod(path, mode);
- if (res == -1)
- return -errno;
-
- return 0;
-}
-
-static int xmp_chown(const char *path, uid_t uid, gid_t gid,
- struct fuse_file_info *fi)
-{
- (void) fi;
- int res;
-
- res = lchown(path, uid, gid);
- if (res == -1)
- return -errno;
-
- return 0;
-}
-
-static int xmp_truncate(const char *path, off_t size,
- struct fuse_file_info *fi)
-{
- int res;
-
- if (fi != NULL)
- res = ftruncate(fi->fh, size);
- else
- res = truncate(path, size);
- if (res == -1)
- return -errno;
-
- return 0;
-}
-
-#ifdef HAVE_UTIMENSAT
-static int xmp_utimens(const char *path, const struct timespec ts[2],
- struct fuse_file_info *fi)
-{
- (void) fi;
- int res;
-
- /* don't use utime/utimes since they follow symlinks */
- res = utimensat(0, path, ts, AT_SYMLINK_NOFOLLOW);
- if (res == -1)
- return -errno;
-
- return 0;
-}
-#endif
-
-static int xmp_create(const char *path, mode_t mode,
- struct fuse_file_info *fi)
-{
- int res;
-
- res = open(path, fi->flags, mode);
- if (res == -1)
- return -errno;
-
- fi->fh = res;
- return 0;
-}
-
-static int xmp_open(const char *path, struct fuse_file_info *fi)
-{
- int res;
-
- res = open(path, fi->flags);
- if (res == -1)
- return -errno;
-
- fi->fh = res;
- return 0;
-}
-
-static int xmp_read(const char *path, char *buf, size_t size, off_t offset,
- struct fuse_file_info *fi)
-{
- int fd;
- int res;
-
- if(fi == NULL)
- fd = open(path, O_RDONLY);
- else
- fd = fi->fh;
-
- if (fd == -1)
- return -errno;
-
- res = pread(fd, buf, size, offset);
- if (res == -1)
- res = -errno;
-
- if(fi == NULL)
- close(fd);
- return res;
-}
-
-static int xmp_write(const char *path, const char *buf, size_t size,
- off_t offset, struct fuse_file_info *fi)
-{
- int fd;
- int res;
-
- (void) fi;
- if(fi == NULL)
- fd = open(path, O_WRONLY);
- else
- fd = fi->fh;
-
- if (fd == -1)
- return -errno;
-
- res = pwrite(fd, buf, size, offset);
- if (res == -1)
- res = -errno;
-
- if(fi == NULL)
- close(fd);
- return res;
-}
-
-static int xmp_statfs(const char *path, struct statvfs *stbuf)
-{
- int res;
-
- res = statvfs(path, stbuf);
- if (res == -1)
- return -errno;
-
- return 0;
-}
-
-static int xmp_release(const char *path, struct fuse_file_info *fi)
-{
- (void) path;
- close(fi->fh);
- return 0;
-}
-
-static int xmp_fsync(const char *path, int isdatasync,
- struct fuse_file_info *fi)
-{
- /* Just a stub. This method is optional and can safely be left
- unimplemented */
-
- (void) path;
- (void) isdatasync;
- (void) fi;
- return 0;
-}
-
-#ifdef HAVE_POSIX_FALLOCATE
-static int xmp_fallocate(const char *path, int mode,
- off_t offset, off_t length, struct fuse_file_info *fi)
-{
- int fd;
- int res;
-
- (void) fi;
-
- if (mode)
- return -EOPNOTSUPP;
-
- if(fi == NULL)
- fd = open(path, O_WRONLY);
- else
- fd = fi->fh;
-
- if (fd == -1)
- return -errno;
-
- res = -posix_fallocate(fd, offset, length);
-
- if(fi == NULL)
- close(fd);
- return res;
-}
-#endif
-
-#ifdef HAVE_SETXATTR
-/* xattr operations are optional and can safely be left unimplemented */
-static int xmp_setxattr(const char *path, const char *name, const char *value,
- size_t size, int flags)
-{
- int res = lsetxattr(path, name, value, size, flags);
- if (res == -1)
- return -errno;
- return 0;
-}
-
-static int xmp_getxattr(const char *path, const char *name, char *value,
- size_t size)
-{
- int res = lgetxattr(path, name, value, size);
- if (res == -1)
- return -errno;
- return res;
-}
-
-static int xmp_listxattr(const char *path, char *list, size_t size)
-{
- int res = llistxattr(path, list, size);
- if (res == -1)
- return -errno;
- return res;
-}
-
-static int xmp_removexattr(const char *path, const char *name)
-{
- int res = lremovexattr(path, name);
- if (res == -1)
- return -errno;
- return 0;
-}
-#endif /* HAVE_SETXATTR */
-
-#ifdef HAVE_COPY_FILE_RANGE
-static ssize_t xmp_copy_file_range(const char *path_in,
- struct fuse_file_info *fi_in,
- off_t offset_in, const char *path_out,
- struct fuse_file_info *fi_out,
- off_t offset_out, size_t len, int flags)
-{
- int fd_in, fd_out;
- ssize_t res;
-
- if(fi_in == NULL)
- fd_in = open(path_in, O_RDONLY);
- else
- fd_in = fi_in->fh;
-
- if (fd_in == -1)
- return -errno;
-
- if(fi_out == NULL)
- fd_out = open(path_out, O_WRONLY);
- else
- fd_out = fi_out->fh;
-
- if (fd_out == -1) {
- close(fd_in);
- return -errno;
- }
-
- res = copy_file_range(fd_in, &offset_in, fd_out, &offset_out, len,
- flags);
- if (res == -1)
- res = -errno;
-
- close(fd_in);
- close(fd_out);
-
- return res;
-}
-#endif
-
-static struct fuse_operations xmp_oper = {
- .init = xmp_init,
- .getattr = xmp_getattr,
- .access = xmp_access,
- .readlink = xmp_readlink,
- .readdir = xmp_readdir,
- .mknod = xmp_mknod,
- .mkdir = xmp_mkdir,
- .symlink = xmp_symlink,
- .unlink = xmp_unlink,
- .rmdir = xmp_rmdir,
- .rename = xmp_rename,
- .link = xmp_link,
- .chmod = xmp_chmod,
- .chown = xmp_chown,
- .truncate = xmp_truncate,
-#ifdef HAVE_UTIMENSAT
- .utimens = xmp_utimens,
-#endif
- .open = xmp_open,
- .create = xmp_create,
- .read = xmp_read,
- .write = xmp_write,
- .statfs = xmp_statfs,
- .release = xmp_release,
- .fsync = xmp_fsync,
-#ifdef HAVE_POSIX_FALLOCATE
- .fallocate = xmp_fallocate,
-#endif
-#ifdef HAVE_SETXATTR
- .setxattr = xmp_setxattr,
- .getxattr = xmp_getxattr,
- .listxattr = xmp_listxattr,
- .removexattr = xmp_removexattr,
-#endif
-#ifdef HAVE_COPY_FILE_RANGE
- .copy_file_range = xmp_copy_file_range,
-#endif
-};
-
-int main(int argc, char *argv[])
-{
- umask(0);
- return fuse_main(argc, argv, &xmp_oper, NULL);
-}
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-03 07:33:34 +0000