x

1 files changed, 142 insertions, 0 deletions

diff --git a/lib/mount.c b/lib/mount.c
new file mode 100644
index 0000000..ace3c65
--- /dev/null
+++ b/lib/mount.c
@@ -0,0 +1,142 @@
+/*
+    FUSE: Filesystem in Userspace
+    Copyright (C) 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_i.h"
+#include <linux/fuse.h>
+
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <fcntl.h>
+#include <sys/mount.h>
+#include <mntent.h>
+
+static int do_mount(const char *dev, const char *dir, const char *type, int fd)
+{
+    int res;
+    struct fuse_mount_data data;
+    
+    data.version = FUSE_MOUNT_VERSION;
+    data.fd = fd;
+
+    res = mount(dev, dir, type, MS_MGC_VAL | MS_NOSUID | MS_NODEV, &data);
+    if(res == -1) {
+        perror("mount failed");
+	return -1;
+    }
+    
+    return 0;
+}
+
+static void add_mntent(const char *dev, const char *dir, const char *type)
+{
+    int res;
+    FILE *fp;
+    struct mntent ent;
+    
+    fp = setmntent("/etc/mtab", "a");
+    if(fp == NULL) {
+        perror("setmntent");
+	return;
+    }
+    
+    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(fp, & ent);
+    if(res != 0)
+	perror("addmntent");
+    
+    endmntent(fp);
+
+}
+
+static void remove_mntent(const char *dir)
+{
+    int res;
+    FILE *fdold, *fdnew;
+    struct mntent *entp;
+        
+    fdold = setmntent("/etc/mtab", "r");
+    if(fdold == NULL) {
+        perror("/etc/mtab");
+	return;
+    }
+
+    fdnew = setmntent("/etc/mtab~", "w");
+    if(fdnew == NULL) {
+        perror("/etc/mtab~");
+	return;
+    }
+
+    do {
+	entp = getmntent(fdold);
+	if(entp != NULL && strcmp(entp->mnt_dir, dir) != 0) {
+            res = addmntent(fdnew, entp);
+            if(res != 0)
+                perror("addmntent");
+        }
+    } while(entp != NULL);
+
+    endmntent(fdold);
+    endmntent(fdnew);
+
+    res = rename("/etc/mtab~", "/etc/mtab");
+    if(res == -1)
+        perror("renameing /etc/mtab~ to /etc/mtab");
+}
+
+int fuse_mount(struct fuse *f, const char *dir)
+{
+    int res;
+    const char *dev = FUSE_DEV;
+    const char *type = "fuse";
+
+    if(f->dir != NULL)
+        return 0;
+
+    f->dir = g_strdup(dir);
+    f->fd = open(dev, O_RDWR);
+    if(f->fd == -1) {
+        perror(dev);
+        return -1;
+    }
+    
+    res = do_mount(dev, dir, type, f->fd);
+    if(res == -1)
+        return -1;
+
+    add_mntent(dev, dir, type);
+    
+    return 0;
+}
+
+int fuse_unmount(struct fuse *f)
+{
+    int res;
+
+    if(f->dir == NULL)
+        return 0;
+
+    close(f->fd);
+    f->fd = -1;
+
+    res = umount(f->dir);
+    if(res == -1)
+        perror("umount failed");
+    else
+        remove_mntent(f->dir);
+
+    g_free(f->dir);
+    f->dir = NULL;
+
+    return res;
+}