NAME
fuse_main
—
FUSE helper function
SYNOPSIS
#include
<fuse.h>
int
fuse_main
(int
argc, char **argv,
const struct fuse_operations
*ops, void
*data);
DESCRIPTION
There are two ways of implementing a FUSE filesystem: by calling
only
fuse_main
()
and passing this function the
ops argument
containing all the callbacks of the filesystem, or by using the other
functions, as detailed in
fuse_loop(3)
argv is the list of arguments supplied to the program's main method and must at a minimum specify the directory on which the file system is to be mounted. The other arguments can be custom arguments specific to the file system or those supported by fuse_parse_cmd_line(3), fuse_new(3) and fuse_mount(3).
EXAMPLES
Here is a simple example of a FUSE implementation:
#include <errno.h> #include <fuse.h> #include <string.h> static int fs_readdir(const char *path, void *data, fuse_fill_dir_t filler, off_t off, struct fuse_file_info *ffi) { if (strcmp(path, "/") != 0) return (-ENOENT); filler(data, ".", NULL, 0); filler(data, "..", NULL, 0); filler(data, "file", NULL, 0); return (0); } static int fs_read(const char *path, char *buf, size_t size, off_t off, struct fuse_file_info *ffi) { if (off >= 5) return (0); size = 5 - off; memcpy(buf, "data." + off, size); return (size); } static int fs_open(const char *path, struct fuse_file_info *ffi) { if (strncmp(path, "/file", 10) != 0) return (-ENOENT); if ((ffi->flags & 3) != O_RDONLY) return (-EACCES); return (0); } static int fs_getattr(const char *path, struct stat *st) { if (strcmp(path, "/") == 0) { st->st_blksize = 512; st->st_mode = 0755; st->st_nlink = 2; } else if (strcmp(path, "/file") == 0) { st->st_mode = 0644; st->st_blksize = 512; st->st_nlink = 1; st->st_size = 5; } else { return (-ENOENT); } return (0); } struct fuse_operations fsops = { .readdir = fs_readdir, .read = fs_read, .open = fs_open, .getattr = fs_getattr, }; int main(int ac, char **av) { return (fuse_main(ac, av, &fsops, NULL)); }
SEE ALSO
fuse_loop(3), fuse_mount(3), fuse_new(3), fuse_parse_cmd_line(3), fuse_setup(3), fuse(4)
STANDARDS
The fuse_main
() function conforms to FUSE
2.6.
HISTORY
The fuse_main
() function first appeared in
OpenBSD 5.4.
AUTHORS
Sylvestre Gallon
<ccna.syl@gmail.com>
Helg Bredow
<helg@openbsd.org>