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Diffstat (limited to 'example/hello.c')
| -rw-r--r-- | example/hello.c | 179 |
1 files changed, 0 insertions, 179 deletions
diff --git a/example/hello.c b/example/hello.c deleted file mode 100644 index f307bf2..0000000 --- a/example/hello.c +++ /dev/null @@ -1,179 +0,0 @@ -/* - FUSE: Filesystem in Userspace - Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu> - - This program can be distributed under the terms of the GNU GPL. - See the file COPYING. -*/ - -/** @file - * - * minimal example filesystem using high-level API - * - * Compile with: - * - * gcc -Wall hello.c `pkg-config fuse3 --cflags --libs` -o hello - * - * ## Source code ## - * \include hello.c - */ - - -#define FUSE_USE_VERSION 31 - -#include <fuse.h> -#include <stdio.h> -#include <string.h> -#include <errno.h> -#include <fcntl.h> -#include <stddef.h> -#include <assert.h> - -/* - * Command line options - * - * We can't set default values for the char* fields here because - * fuse_opt_parse would attempt to free() them when the user specifies - * different values on the command line. - */ -static struct options { - const char *filename; - const char *contents; - int show_help; -} options; - -#define OPTION(t, p) \ - { t, offsetof(struct options, p), 1 } -static const struct fuse_opt option_spec[] = { - OPTION("--name=%s", filename), - OPTION("--contents=%s", contents), - OPTION("-h", show_help), - OPTION("--help", show_help), - FUSE_OPT_END -}; - -static void *hello_init(struct fuse_conn_info *conn, - struct fuse_config *cfg) -{ - (void) conn; - cfg->kernel_cache = 1; - return NULL; -} - -static int hello_getattr(const char *path, struct stat *stbuf, - struct fuse_file_info *fi) -{ - (void) fi; - int res = 0; - - memset(stbuf, 0, sizeof(struct stat)); - if (strcmp(path, "/") == 0) { - stbuf->st_mode = S_IFDIR | 0755; - stbuf->st_nlink = 2; - } else if (strcmp(path+1, options.filename) == 0) { - stbuf->st_mode = S_IFREG | 0444; - stbuf->st_nlink = 1; - stbuf->st_size = strlen(options.contents); - } else - res = -ENOENT; - - return res; -} - -static int hello_readdir(const char *path, void *buf, fuse_fill_dir_t filler, - off_t offset, struct fuse_file_info *fi, - enum fuse_readdir_flags flags) -{ - (void) offset; - (void) fi; - (void) flags; - - if (strcmp(path, "/") != 0) - return -ENOENT; - - filler(buf, ".", NULL, 0, 0); - filler(buf, "..", NULL, 0, 0); - filler(buf, options.filename, NULL, 0, 0); - - return 0; -} - -static int hello_open(const char *path, struct fuse_file_info *fi) -{ - if (strcmp(path+1, options.filename) != 0) - return -ENOENT; - - if ((fi->flags & O_ACCMODE) != O_RDONLY) - return -EACCES; - - return 0; -} - -static int hello_read(const char *path, char *buf, size_t size, off_t offset, - struct fuse_file_info *fi) -{ - size_t len; - (void) fi; - if(strcmp(path+1, options.filename) != 0) - return -ENOENT; - - len = strlen(options.contents); - if (offset < len) { - if (offset + size > len) - size = len - offset; - memcpy(buf, options.contents + offset, size); - } else - size = 0; - - return size; -} - -static struct fuse_operations hello_oper = { - .init = hello_init, - .getattr = hello_getattr, - .readdir = hello_readdir, - .open = hello_open, - .read = hello_read, -}; - -static void show_help(const char *progname) -{ - printf("usage: %s [options] <mountpoint>\n\n", progname); - printf("File-system specific options:\n" - " --name=<s> Name of the \"hello\" file\n" - " (default: \"hello\")\n" - " --contents=<s> Contents \"hello\" file\n" - " (default \"Hello, World!\\n\")\n" - "\n"); -} - -int main(int argc, char *argv[]) -{ - int ret; - struct fuse_args args = FUSE_ARGS_INIT(argc, argv); - - /* Set defaults -- we have to use strdup so that - fuse_opt_parse can free the defaults if other - values are specified */ - options.filename = strdup("hello"); - options.contents = strdup("Hello World!\n"); - - /* Parse options */ - if (fuse_opt_parse(&args, &options, option_spec, NULL) == -1) - return 1; - - /* When --help is specified, first print our own file-system - specific help text, then signal fuse_main to show - additional help (by adding `--help` to the options again) - without usage: line (by setting argv[0] to the empty - string) */ - if (options.show_help) { - show_help(argv[0]); - assert(fuse_opt_add_arg(&args, "--help") == 0); - args.argv[0][0] = '\0'; - } - - ret = fuse_main(args.argc, args.argv, &hello_oper, NULL); - fuse_opt_free_args(&args); - return ret; -} |