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-rw-r--r--fusemount.c399
1 files changed, 0 insertions, 399 deletions
diff --git a/fusemount.c b/fusemount.c
deleted file mode 100644
index 574a3fd..0000000
--- a/fusemount.c
+++ /dev/null
@@ -1,399 +0,0 @@
-/*
- AVFS: A Virtual File System Library
- Copyright (C) 1998-2001 Miklos Szeredi (mszeredi@inf.bme.hu)
-
- This program can be distributed under the terms of the GNU GPL.
- See the file COPYING.
-*/
-
-#include "fuse.h"
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <signal.h>
-#include <dirent.h>
-#include <assert.h>
-#include <errno.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <sys/mount.h>
-#include <mntent.h>
-#include <glib.h>
-
-static char *mount_dir;
-
-const char *basedir = "/tmp/pro";
-
-struct node {
- char *name;
- unsigned long ino;
-};
-
-static GNode *root;
-static GHashTable *nodetab;
-static unsigned long inoctr = FUSE_ROOT_INO;
-
-static GNode *new_node(const char *name, unsigned long ino)
-{
- struct node *node = g_new0(struct node, 1);
- GNode *gn = g_node_new(node);
-
- node->name = g_strdup(name);
- node->ino = ino;
-
- return gn;
-}
-
-static unsigned long find_node(unsigned long ino, const char *name)
-{
- GNode *cn;
- GNode *pn = g_hash_table_lookup(nodetab, (gpointer) ino);
- if(pn == NULL) {
- fprintf(stderr, "Can't find parent node %li\n", ino);
- return 0;
- }
-
- for(cn = pn->children; cn != NULL; cn = cn->next) {
- struct node *node = (struct node *) cn->data;
- if(strcmp(node->name, name) == 0)
- return node->ino;
- }
-
- do inoctr++;
- while(!inoctr && g_hash_table_lookup(nodetab, (gpointer) ino) != NULL);
-
- cn = new_node(name, inoctr);
- g_node_insert(pn, -1, cn);
- g_hash_table_insert(nodetab, (gpointer) inoctr, cn);
-
- return inoctr;
-}
-
-static char *real_path(unsigned long ino)
-{
- GString *s;
- char *ss;
- GNode *gn = g_hash_table_lookup(nodetab, (gpointer) ino);
-
- if(gn == NULL) {
- fprintf(stderr, "Can't find node %li\n", ino);
- return NULL;
- }
-
- s = g_string_new("");
- for(; gn != NULL; gn = gn->parent) {
- g_string_prepend(s, ((struct node *) gn->data)->name);
- g_string_prepend_c(s, '/');
- }
- g_string_prepend(s, basedir);
- ss = s->str;
- g_string_free(s, FALSE);
-
- return ss;
-}
-
-static int get_dir(unsigned long dir)
-{
- int dirfd;
- struct fuse_dirent dirent;
- DIR *dp;
- struct dirent *de;
- size_t reclen;
- char *path;
-
- path = real_path(dir);
- if(path == NULL)
- return -ENOENT;
-
- dp = opendir(path);
- g_free(path);
- if(dp == NULL) {
- perror(path);
- return -errno;
- }
- dirfd = open("/tmp/dirtmp", O_RDWR | O_TRUNC | O_CREAT, 0600);
- if(dirfd == -1) {
- perror("/tmp/dirtmp");
- exit(1);
- }
- while((de = readdir(dp)) != NULL) {
- unsigned long ino = find_node(dir, de->d_name);
- assert(ino != 0);
-
- dirent.ino = ino;
- dirent.namelen = strlen(de->d_name);
- assert(dirent.namelen <= NAME_MAX);
- strcpy(dirent.name, de->d_name);
- dirent.type = de->d_type;
-
- reclen = FUSE_DIRENT_SIZE(&dirent);
- write(dirfd, &dirent, reclen);
- }
- closedir(dp);
-
- return dirfd;
-}
-
-static int get_attributes(unsigned long ino, struct fuse_attr *attr)
-{
- char *path;
- struct stat buf;
- int res;
-
- path = real_path(ino);
- if(path == NULL)
- return -ENOENT;
-
- res = stat(path, &buf);
- g_free(path);
- if(res == -1)
- return -errno;
-
- attr->mode = buf.st_mode;
- attr->nlink = buf.st_nlink;
- attr->uid = buf.st_uid;
- attr->gid = buf.st_gid;
- attr->rdev = buf.st_rdev;
- attr->size = buf.st_size;
- attr->blksize = buf.st_blksize;
- attr->blocks = buf.st_blocks;
- attr->atime = buf.st_atime;
- attr->mtime = buf.st_mtime;
- attr->ctime = buf.st_ctime;
-
- return 0;
-}
-
-static void loop(int devfd)
-{
- int res;
- struct fuse_param param;
- struct fuse_outparam out;
- struct fuse_inparam in;
- int dirfd;
-
- while(1) {
- res = read(devfd, &param, sizeof(param));
- if(res == -1) {
- perror("read");
- exit(1);
- }
-
- printf("unique: %i, opcode: %i\n", param.unique, param.u.i.opcode);
-
- dirfd = -1;
- in = param.u.i;
- switch(in.opcode) {
- case FUSE_LOOKUP:
- out.u.lookup.ino = find_node(in.ino, in.u.lookup.name);
- if(out.u.lookup.ino == 0)
- out.result = -ENOENT;
- else
- out.result = get_attributes(out.u.lookup.ino,
- &out.u.lookup.attr);
- break;
-
- case FUSE_GETATTR:
- out.result = get_attributes(in.ino, &out.u.getattr.attr);
- break;
-
- case FUSE_OPEN:
- dirfd = get_dir(in.ino);
- if(dirfd >= 0) {
- out.u.open.fd = dirfd;
- out.result = 0;
- }
- else
- out.result = dirfd;
- break;
-
- case FUSE_RELEASE:
- out.result = 0;
- break;
-
- default:
- out.result = -EOPNOTSUPP;
- }
- param.u.o = out;
-
- res = write(devfd, &param, sizeof(param));
- if(res == -1) {
- perror("write");
- exit(1);
- }
- if(dirfd != -1) {
- close(dirfd);
- unlink("/tmp/dirtmp");
- }
- }
-}
-
-static int mount_fuse(const char *dev, const char *dir, int devfd)
-{
- int res;
- const char *type;
- FILE *fd;
- struct mntent ent;
- struct fuse_mount_data data;
-
- data.version = FUSE_MOUNT_VERSION;
- data.fd = devfd;
-
- type = "fuse";
- res = mount(dev, dir, type, MS_MGC_VAL | MS_NOSUID | MS_NODEV, &data);
-
- if(res == -1) {
- fprintf(stderr, "mount failed: %s\n", strerror(errno));
- return -1;
- }
-
- fd = setmntent("/etc/mtab", "a");
- if(fd == NULL) {
- fprintf(stderr, "setmntent(\"/etc/mtab\") failed: %s\n",
- strerror(errno));
- return -1;
- }
-
- ent.mnt_fsname = (char *) dev;
- ent.mnt_dir = (char *) dir;
- ent.mnt_type = (char *) type;
- ent.mnt_opts = "rw,nosuid,nodev";
- ent.mnt_freq = 0;
- ent.mnt_passno = 0;
- res = addmntent(fd, & ent);
- if(res != 0)
- fprintf(stderr, "addmntent() failed: %s\n", strerror(errno));
-
- endmntent(fd);
-
- return 0;
-}
-
-int unmount_fuse(const char *dir)
-{
- int res;
- FILE *fdold, *fdnew;
- struct mntent *entp;
-
- res = umount(dir);
-
- if(res == -1) {
- fprintf(stderr, "umount failed: %s\n", strerror(errno));
- return -1;
- }
-
- fdold = setmntent("/etc/mtab", "r");
- if(fdold == NULL) {
- fprintf(stderr, "setmntent(\"/etc/mtab\") failed: %s\n",
- strerror(errno));
- return -1;
- }
-
- fdnew = setmntent("/etc/mtab~", "w");
- if(fdnew == NULL) {
- fprintf(stderr, "setmntent(\"/etc/mtab~\") failed: %s\n",
- strerror(errno));
- return -1;
- }
-
- do {
- entp = getmntent(fdold);
- if(entp != NULL) {
- if(strcmp(entp->mnt_dir, dir) != 0) {
- res = addmntent(fdnew, entp);
- if(res != 0) {
- fprintf(stderr, "addmntent() failed: %s\n",
- strerror(errno));
- }
- }
- }
- } while(entp != NULL);
-
- endmntent(fdold);
- endmntent(fdnew);
-
- res = rename("/etc/mtab~", "/etc/mtab");
- if(res == -1) {
- fprintf(stderr, "rename(\"/etc/mtab~\", \"/etc/mtab\") failed: %s\n",
- strerror(errno));
- return -1;
- }
-
- return 0;
-}
-
-void cleanup()
-{
- unmount_fuse(mount_dir);
-}
-
-
-void exit_handler()
-{
- exit(0);
-}
-
-void set_signal_handlers()
-{
- struct sigaction sa;
-
- sa.sa_handler = exit_handler;
- sigemptyset(&(sa.sa_mask));
- sa.sa_flags = 0;
-
- if (sigaction(SIGHUP, &sa, NULL) == -1 ||
- sigaction(SIGINT, &sa, NULL) == -1 ||
- sigaction(SIGTERM, &sa, NULL) == -1) {
-
- perror("Cannot set exit signal handlers");
- exit(1);
- }
-
- sa.sa_handler = SIG_IGN;
-
- if(sigaction(SIGPIPE, &sa, NULL) == -1) {
- perror("Cannot set ignored signals");
- exit(1);
- }
-}
-
-
-int main(int argc, char *argv[])
-{
- const char *dev;
- int devfd;
-
- if(argc < 3) {
- fprintf(stderr, "usage: %s dev dir\n", argv[0]);
- exit(1);
- }
-
- dev = argv[1];
- mount_dir = argv[2];
-
- devfd = open(dev, O_RDWR);
- if(devfd == -1) {
- fprintf(stderr, "failed to open %s: %s\n", dev, strerror(errno));
- exit(1);
- }
-
- mount_fuse(dev, mount_dir, devfd);
-
- set_signal_handlers();
- atexit(cleanup);
-
- root = new_node("/", FUSE_ROOT_INO);
- nodetab = g_hash_table_new(NULL, NULL);
- g_hash_table_insert(nodetab, (gpointer) FUSE_ROOT_INO, root);
-
- loop(devfd);
-
- return 0;
-}
-
-
-
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