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httpdirfs
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moved fuse function to a separate file

This commit is contained in:
Fufu Fang 2018-07-26 10:01:47 +01:00
parent 9950d04378
commit a23eecb4c3
4 changed files with 156 additions and 143 deletions
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2
Makefile
View File

@ -1,7 +1,7 @@
CC=gcc
CFLAGS= -g -O2 -Wall -Wextra -lgumbo -lcurl -lfuse -lcrypto \
-D_FILE_OFFSET_BITS=64
OBJ = main.o network.o
OBJ = main.o network.o fuse_local.o
%.o: %.c
$(CC) -c -o $@ $< $(CFLAGS)

135
fuse_local.c Normal file
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@ -0,0 +1,135 @@
#include "fuse_local.h"
#include "network.h"
#include <errno.h>
#include <string.h>
#include <unistd.h>
static void *fs_init(struct fuse_conn_info *conn);
static int fs_getattr(const char *path, struct stat *stbuf);
static int fs_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
off_t offset, struct fuse_file_info *fi);
static int fs_open(const char *path, struct fuse_file_info *fi);
static int fs_read(const char *path, char *buf, size_t size, off_t offset,
struct fuse_file_info *fi);
static struct fuse_operations fs_oper = {
.getattr = fs_getattr,
.readdir = fs_readdir,
.open = fs_open,
.read = fs_read,
.init = fs_init
};
int fuse_local_init(int argc, char **argv)
{
return fuse_main(argc, argv, &fs_oper, NULL);
}
static void *fs_init(struct fuse_conn_info *conn)
{
(void) conn;
return NULL;
}
/** \brief return the attributes for a single file indicated by path */
static int fs_getattr(const char *path, struct stat *stbuf)
{
int res = 0;
memset(stbuf, 0, sizeof(struct stat));
if (!strcmp(path, "/")) {
stbuf->st_mode = S_IFDIR | 0755;
stbuf->st_nlink = 1;
} else {
Link *link = path_to_Link(path);
if (!link) {
return -ENOENT;
}
struct timespec spec;
spec.tv_sec = link->time;
stbuf->st_mtim = spec;
switch (link->type) {
case LINK_DIR:
stbuf->st_mode = S_IFDIR | 0755;
stbuf->st_nlink = 1;
break;
case LINK_FILE:
stbuf->st_mode = S_IFREG | 0444;
stbuf->st_nlink = 1;
stbuf->st_size = link->content_length;
stbuf->st_blksize = 128*1024;
stbuf->st_blocks = (link->content_length)/512;
break;
default:
return -ENOENT;
}
}
stbuf->st_uid = getuid();
stbuf->st_gid = getgid();
return res;
}
/** \brief read a file */
static int fs_read(const char *path, char *buf, size_t size, off_t offset,
struct fuse_file_info *fi)
{
(void) fi;
long received = path_download(path, buf, size, offset);
return received;
}
/** \brief open a file indicated by the path */
static int fs_open(const char *path, struct fuse_file_info *fi)
{
if (!path_to_Link(path)) {
return -ENOENT;
}
if ((fi->flags & 3) != O_RDONLY) {
return -EACCES;
}
return 0;
}
/** \brief read the directory indicated by the path*/
static int fs_readdir(const char *path, void *buf, fuse_fill_dir_t dir_add,
off_t offset, struct fuse_file_info *fi)
{
(void) offset;
(void) fi;
Link *link;
LinkTable *linktbl;
if (!strcmp(path, "/")) {
linktbl = ROOT_LINK_TBL;
} else {
link = path_to_Link(path);
if (!link) {
return -ENOENT;
}
linktbl = link->next_table;
if (!linktbl) {
linktbl = LinkTable_new(link->f_url);
if(!linktbl) {
return -ENOENT;
}
}
}
/* start adding the links */
dir_add(buf, ".", NULL, 0);
dir_add(buf, "..", NULL, 0);
for (int i = 1; i < linktbl->num; i++) {
link = linktbl->links[i];
if (link->type != LINK_INVALID) {
dir_add(buf, link->p_url, NULL, 0);
}
}
return 0;
}

10
fuse_local.h Normal file
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@ -0,0 +1,10 @@
#ifndef FUSE_LOCAL_H
#define FUSE_LOCAL_H
/* must be included before including <fuse.h> */
#define FUSE_USE_VERSION 26
#include <fuse.h>
int fuse_local_init(int argc, char **argv);
#endif

152
main.c
View File

@ -1,35 +1,9 @@
#include "network.h"
#include "fuse_local.h"
/* must be included before including <fuse.h> */
#define FUSE_USE_VERSION 26
#include <fuse.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
static char *BASE_URL;
static uid_t uid;
static gid_t gid;
static void fs_usage();
static void *fs_init(struct fuse_conn_info *conn);
static int fs_getattr(const char *path, struct stat *stbuf);
static int fs_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
off_t offset, struct fuse_file_info *fi);
static int fs_open(const char *path, struct fuse_file_info *fi);
static int fs_read(const char *path, char *buf, size_t size, off_t offset,
struct fuse_file_info *fi);
static struct fuse_operations fs_oper = {
.getattr = fs_getattr,
.readdir = fs_readdir,
.open = fs_open,
.read = fs_read,
.init = fs_init
};
static void help();
int main(int argc, char **argv)
{
@ -38,131 +12,25 @@ int main(int argc, char **argv)
* https://www.cs.nmsu.edu/~pfeiffer/fuse-tutorial/src/bbfs.c
*/
if ((argc < 3) || (argv[argc-2][0] == '-') || (argv[argc-1][0] == '-')) {
fs_usage();
help();
}
uid = getuid();
gid = getgid();
BASE_URL = argv[argc-2];
argv[argc-2] = argv[argc-1];
argv[argc-1] = NULL;
argc--;
return fuse_main(argc, argv, &fs_oper, NULL);
char *BASE_URL = argv[argc-2];
network_init(BASE_URL);
fuse_local_init(argc, argv);
return 0;
}
static void fs_usage()
static void help()
{
fprintf(stderr,
"usage: mount-http-dir [options] URL mount_point\n");
exit(EXIT_FAILURE);
}
static void *fs_init(struct fuse_conn_info *conn)
{
(void) conn;
network_init(BASE_URL);
return NULL;
}
/** \brief return the attributes for a single file indicated by path */
static int fs_getattr(const char *path, struct stat *stbuf)
{
int res = 0;
memset(stbuf, 0, sizeof(struct stat));
if (!strcmp(path, "/")) {
stbuf->st_mode = S_IFDIR | 0755;
stbuf->st_nlink = 1;
} else {
Link *link = path_to_Link(path);
if (!link) {
return -ENOENT;
}
struct timespec spec;
spec.tv_sec = link->time;
stbuf->st_mtim = spec;
switch (link->type) {
case LINK_DIR:
stbuf->st_mode = S_IFDIR | 0755;
stbuf->st_nlink = 1;
break;
case LINK_FILE:
stbuf->st_mode = S_IFREG | 0444;
stbuf->st_nlink = 1;
stbuf->st_size = link->content_length;
stbuf->st_blksize = 128*1024;
stbuf->st_blocks = (link->content_length)/512;
break;
default:
return -ENOENT;
}
}
stbuf->st_uid = uid;
stbuf->st_gid = gid;
return res;
}
/** \brief read a file */
static int fs_read(const char *path, char *buf, size_t size, off_t offset,
struct fuse_file_info *fi)
{
(void) fi;
long received = path_download(path, buf, size, offset);
return received;
}
/** \brief open a file indicated by the path */
static int fs_open(const char *path, struct fuse_file_info *fi)
{
if (!path_to_Link(path)) {
return -ENOENT;
}
if ((fi->flags & 3) != O_RDONLY) {
return -EACCES;
}
return 0;
}
/** \brief read the directory indicated by the path*/
static int fs_readdir(const char *path, void *buf, fuse_fill_dir_t dir_add,
off_t offset, struct fuse_file_info *fi)
{
(void) offset;
(void) fi;
Link *link;
LinkTable *linktbl;
if (!strcmp(path, "/")) {
linktbl = ROOT_LINK_TBL;
} else {
link = path_to_Link(path);
if (!link) {
return -ENOENT;
}
linktbl = link->next_table;
if (!linktbl) {
linktbl = LinkTable_new(link->f_url);
if(!linktbl) {
return -ENOENT;
}
}
}
/* start adding the links */
dir_add(buf, ".", NULL, 0);
dir_add(buf, "..", NULL, 0);
for (int i = 1; i < linktbl->num; i++) {
link = linktbl->links[i];
if (link->type != LINK_INVALID) {
dir_add(buf, link->p_url, NULL, 0);
}
}
return 0;
}