示例#1
1
文件: ct.c 项目: mkatkar/libct
static int set_ct_root(struct container *ct)
{
	char put_root[] = "libct-root.XXXXXX";

	if (!(ct->nsmask & CLONE_NEWNS))
		return set_current_root(ct->root_path);

	/*
	 * We're in new mount namespace. No need in
	 * just going into chroot, do pivot root, that
	 * gives us the ability to umount old tree.
	 */

	if (mount(ct->root_path, ct->root_path, NULL, MS_BIND | MS_REC, NULL) == -1)
		return -1;

	if (chdir(ct->root_path))
		return -1;

	if (mkdtemp(put_root) == NULL)
		return -1;

	if (pivot_root(".", put_root)) {
		rmdir(put_root);
		return -1;
	}

	if (umount2(put_root, MNT_DETACH))
		return -1;

	rmdir(put_root);
	return 0;
}
示例#2
0
CFSMounter::UMountRes CFSMounter::umount(const char * const dir)
{
	UMountRes res = UMRES_OK;
	if (dir != NULL)
	{
		if (umount2(dir, MNT_FORCE) != 0)
		{
			return UMRES_ERR;
		}
	}
	else
	{
		MountInfo mi;
		std::ifstream in("/proc/mounts", std::ifstream::in);
		while(in.good())
		{
			in >> mi.device >> mi.mountPoint >> mi.type;
			in.ignore(std::numeric_limits<std::streamsize>::max(), '\n');

			if(strcmp(mi.type.c_str(),"nfs")==0 && strcmp(mi.mountPoint.c_str(),"/")==0)
			{
				if (umount2(mi.mountPoint.c_str(),MNT_FORCE) != 0)
				{
					printf("[CFSMounter] Error umounting %s\n",mi.device.c_str());
					res = UMRES_ERR;
				}
			}
		}
	}
	if (nfs_mounted_once)
		remove_modules(CFSMounter::NFS);
	return res;
}
示例#3
0
void procd_coldplug(void)
{
	char *argv[] = { "udevtrigger", NULL };

	umount2("/dev/pts", MNT_DETACH);
	umount2("/dev/", MNT_DETACH);
	mount("tmpfs", "/dev", "tmpfs", 0, "mode=0755,size=512K");
	mkdir("/dev/shm", 0755);
	mkdir("/dev/pts", 0755);
	mount("devpts", "/dev/pts", "devpts", 0, 0);
	udevtrigger.cb = udevtrigger_complete;
	udevtrigger.pid = fork();
	if (!udevtrigger.pid) {
		execvp(argv[0], argv);
		ERROR("Failed to start coldplug\n");
		exit(-1);
	}

	if (udevtrigger.pid <= 0) {
		ERROR("Failed to start new coldplug instance\n");
		return;
	}

	uloop_process_add(&udevtrigger);

	DEBUG(4, "Launched coldplug instance, pid=%d\n", (int) udevtrigger.pid);
}
示例#4
0
static void
cleanup_dev (void)
{
	if (!access (MOVE_DEV_PATH "/kmsg", W_OK)) {
		umount2 (MOVE_DEV_PATH PROC_PATH, MNT_DETACH);
		umount2 (MOVE_DEV_PATH, MNT_DETACH);
		rmdir (MOVE_DEV_PATH);
	}
}
示例#5
0
static void
umount_api (const char *path)
{
    verbose_do ("Unmounting ", path);
    if (umount2 (path, 0) < 0 && umount2 (path, MNT_DETACH) < 0)
        verbose_fail (errno);
    else if (level > 0)
        aa_put_title (0, "Unmounted", path, 1);
}
示例#6
0
/* Check whether the kernel supports UMOUNT_NOFOLLOW flag */
static int umount_nofollow_support(void)
{
	int res = umount2("", UMOUNT_UNUSED);
	if (res != -1 || errno != EINVAL)
		return 0;

	res = umount2("", UMOUNT_NOFOLLOW);
	if (res != -1 || errno != ENOENT)
		return 0;

	return 1;
}
示例#7
0
文件: attach.c 项目: Archer-sys/lxc
static int lxc_attach_remount_sys_proc(void)
{
	int ret;

	ret = unshare(CLONE_NEWNS);
	if (ret < 0) {
		SYSERROR("failed to unshare mount namespace");
		return -1;
	}

	if (detect_shared_rootfs()) {
		if (mount(NULL, "/", NULL, MS_SLAVE|MS_REC, NULL)) {
			SYSERROR("Failed to make / rslave");
			ERROR("Continuing...");
		}
	}

	/* assume /proc is always mounted, so remount it */
	ret = umount2("/proc", MNT_DETACH);
	if (ret < 0) {
		SYSERROR("failed to unmount /proc");
		return -1;
	}

	ret = mount("none", "/proc", "proc", 0, NULL);
	if (ret < 0) {
		SYSERROR("failed to remount /proc");
		return -1;
	}

	/* try to umount /sys - if it's not a mount point,
	 * we'll get EINVAL, then we ignore it because it
	 * may not have been mounted in the first place
	 */
	ret = umount2("/sys", MNT_DETACH);
	if (ret < 0 && errno != EINVAL) {
		SYSERROR("failed to unmount /sys");
		return -1;
	} else if (ret == 0) {
		/* remount it */
		ret = mount("none", "/sys", "sysfs", 0, NULL);
		if (ret < 0) {
			SYSERROR("failed to remount /sys");
			return -1;
		}
	}

	return 0;
}
int unlink_fundamental_devices(const char* chroot_path) {
  unlink_fundamental_device(chroot_path,"/dev/null");
  unlink_fundamental_device(chroot_path,"/dev/zero");
  unlink_fundamental_device(chroot_path,"/dev/random");
  unlink_fundamental_device(chroot_path,"/dev/urandom");
  // unmount /dev/shm for linux only
#ifdef __linux__
    char *fullpath = (char *)
        malloc(strlen(chroot_path) + strlen("/dev/shm") + 1);
    sprintf(fullpath, "%s/dev/shm", chroot_path);
    if (umount2(fullpath, MNT_FORCE) < 0)
    {
        fprintf(stderr, "Could not unmount %s (%s).  Aborting.\n",
            fullpath, strerror(errno));
        exit(ERR_EXIT_CODE);
    }
    if (rmdir(fullpath) < 0)
    {
        fprintf(stderr, "Could not rmdir %s (%s).  Aborting.\n",
            fullpath, strerror(errno));
        exit(ERR_EXIT_CODE);
    }
    free(fullpath);
#endif
  return 0;
}
int create_fundamental_devices(const char* chroot_path) {
  // we need to let the devices be created with the appropriate
  // modes. However, since the file will be group-owned by
  // the user creating the device, we make sure the umask prevent
  // the user from having any permission granted just by the group.
  mode_t original_mask = umask(0070);
  create_fundamental_device(chroot_path,"/dev/null");
  create_fundamental_device(chroot_path,"/dev/zero");
  create_fundamental_device(chroot_path,"/dev/random");
  create_fundamental_device(chroot_path,"/dev/urandom");

  // add a mount for /dev/shm for linux only
#ifdef __linux__
    char *fullpath = (char *)
        malloc(strlen(chroot_path) + strlen("/dev/shm") + 1);
    sprintf(fullpath, "%s/dev/shm", chroot_path);

    struct stat statbuf;
    mode_t perms = (0777 | S_ISVTX);

    // clean up from a previous run and set up for this one
    umount2(fullpath, MNT_FORCE);
    rmdir(fullpath);
    mkdir(fullpath, perms);
    if (chown(fullpath, 0, 0) < 0)
    {
        fprintf(stderr, "Could not chown %s to root.  Aborting.\n", fullpath);
        exit(ERR_EXIT_CODE);
    }
    if (chmod(fullpath, perms) < 0)
    {
        fprintf(stderr, "Could not chmod %s to 777+sticky.  Aborting.\n",
            fullpath);
        exit(ERR_EXIT_CODE);
    }
    if (stat(fullpath, &statbuf) < 0)
    {
        fprintf(stderr, "Could not stat %s.  Aborting.\n", fullpath);
        exit(ERR_EXIT_CODE);
    }
    if (!S_ISDIR(statbuf.st_mode))
    {
        fprintf(stderr, "%s not a directory.  Aborting.\n", fullpath);
        exit(ERR_EXIT_CODE);
    }
    if ((statbuf.st_mode & perms) != perms)
    {
        fprintf(stderr, "Wrong perms on %s.  Aborting.\n", fullpath);
        exit(ERR_EXIT_CODE);
    }
    if (mount("tmpfs", fullpath, "tmpfs", MS_MGC_VAL, "size=128m") < 0)
    {
        fprintf(stderr, "Could not mount %s.  Aborting.\n", fullpath);
        exit(ERR_EXIT_CODE);
    }
    free(fullpath);
#endif
  umask(original_mask);
  return 0;
}
示例#10
0
void UndoBindMounts(char *DirList, int Flags)
{
char *UmountList=NULL, *Token=NULL, *Tempstr=NULL, *ptr, *dptr;

//Reverse dir list so we unmount in reverse order
//to the mounts
ptr=GetToken(DirList,",",&Token,0);
while (ptr)
{
	dptr=Token;
	Tempstr=MCopyStr(Tempstr,dptr,",",UmountList,NULL);
	UmountList=CopyStr(UmountList,Tempstr);
	ptr=GetToken(ptr,",",&Token,0);
}


ptr=GetToken(UmountList,",",&Token,0);
while (ptr)
{
	dptr=strrchr(Token,':');
	if (dptr) dptr++; 
	else dptr=Token;

	while (*dptr=='/') dptr++;
	umount2(dptr, MNT_DETACH);
	RmDirPath(dptr);
	ptr=GetToken(ptr,",",&Token,0);
}

DestroyString(Token);
}
示例#11
0
int CNFSSmallMenu::exec( CMenuTarget* parent, const std::string & actionKey )
{
	if (actionKey.empty())
	{
		CMenuWidget menu(LOCALE_NETWORKMENU_MOUNT, NEUTRINO_ICON_STREAMING);
		CNFSMountGui mountGui;
		CNFSUmountGui umountGui;
		CMenuForwarder *remount_fwd = new CMenuForwarder(LOCALE_NFS_REMOUNT, true, NULL, this, "remount");
		remount_fwd->setItemButton(NEUTRINO_ICON_BUTTON_OKAY, true);
		menu.addIntroItems();
		menu.addItem(remount_fwd);
		menu.addItem(new CMenuForwarder(LOCALE_NFS_MOUNT , true, NULL, & mountGui));
		menu.addItem(new CMenuForwarder(LOCALE_NFS_UMOUNT, true, NULL, &umountGui));
		return menu.exec(parent, actionKey);
	}
	else if(actionKey.substr(0,7) == "remount")
	{
		//umount automount dirs
		for(int i = 0; i < NETWORK_NFS_NR_OF_ENTRIES; i++)
		{
			if(g_settings.network_nfs_automount[i])
				umount2(g_settings.network_nfs_local_dir[i],MNT_FORCE);
		}
		CFSMounter::automount();
		return menu_return::RETURN_REPAINT;
	}
	return menu_return::RETURN_REPAINT;
}
static int do_unmount(const char* mountpoint, int flags) {
#if defined(__linux__) || defined(__sun__)
    return umount2(mountpoint, flags);
#else
    return unmount(mountpoint, flags);
#endif
}
示例#13
0
void sc_do_umount(const char *target, int flags)
{
	char buf[10000] = { 0 };
	const char *umount_cmd = NULL;

	if (sc_is_debug_enabled()) {
#ifdef SNAP_CONFINE_DEBUG_BUILD
		umount_cmd = sc_umount_cmd(buf, sizeof(buf), target, flags);
#else
		umount_cmd = use_debug_build;
#endif
		debug("performing operation: %s", umount_cmd);
	}
	if (sc_faulty("umount", NULL) || umount2(target, flags) < 0) {
		// Save errno as ensure can clobber it.
		int saved_errno = errno;

		// Drop privileges so that we can compute our nice error message
		// without risking an attack on one of the string functions there.
		sc_privs_drop();

		// Compute the equivalent umount command.
		umount_cmd = sc_umount_cmd(buf, sizeof(buf), target, flags);
		// Restore errno and die.
		errno = saved_errno;
		die("cannot perform operation: %s", umount_cmd);
	}
}
示例#14
0
static int umount_and_exec(char **argv) {
	char *mountpoint = argv[0];
	char *cmd        = argv[1];

	if (unshare(CLONE_NEWNS) == -1) {
		if(!(flags&QUIET))
			fprintf(stderr, "Cannot unshare(CLONE_NEWNS): %s (errno: %i)\n", strerror(errno), errno);
		return errno;
	}

	if(mountpoint == NULL)
		return EINVAL;

	if(umount2(mountpoint, MNT_DETACH)) {
		if(!(flags&QUIET))
			fprintf(stderr, "Cannot umount2(\"%s\", MNT_DETACH) in the new namespace: %s (errno: %i)\n", mountpoint, strerror(errno), errno);
		return errno;
	}
	if(cmd == NULL) {
		char *argv_exec[2] = { NULL };
		cmd = getenv("SHELL");
		argv_exec[1] = cmd;
		return my_execvp(cmd, argv_exec);
	}

	char **argv_exec = &argv[1];

	return my_execvp(cmd, argv_exec);
}
示例#15
0
文件: util.c 项目: frugalware/fwife
int umount_if_needed(char *sourcedir)
{
	FILE *fp;
	char line[PATH_MAX];
	char *dev = NULL;
	char *realdir;
	int i;

	realdir = g_strdup_printf("%s/%s", TARGETDIR, sourcedir);

	if ((fp = fopen("/proc/mounts", "r")) == NULL) {
		perror(_("Could not open output file for writing"));
		return(1);
	}
	while(!feof(fp))
	{
		if(fgets(line, PATH_MAX, fp) == NULL)
			break;
		if(strstr(line, realdir))
		{
			for(i=0;i<strlen(line);i++)
				if(line[i]==' ')
					line[i]='\0';
			dev = strdup(line);
		}
	}
	fclose(fp);
	if(dev != NULL)
		return (umount2(dev,0));
	return(0);
}
示例#16
0
int main(int argc, char **argv)
{
	int fd, ret = 1;
	char buf[1024], fname[PATH_MAX];

	test_init(argc, argv);

	mkdir(dirname, 0700);
	if (mount("none", dirname, "tmpfs", MS_RDONLY, "") < 0) {
		fail("Can't mount tmpfs");
		return 1;
	}

	snprintf(fname, sizeof(buf), "%s/test.file", dirname);

	test_daemon();
	test_waitsig();


	fd = open(fname, O_RDWR | O_CREAT, 0777);
	if (fd >= 0 || errno != EROFS) {
		pr_perror("open failed -> %d", fd);
		goto err;
	}

	pass();
	ret = 0;
err:
	umount2(dirname, MNT_DETACH);
	rmdir(dirname);
	return ret;
}
示例#17
0
int
__pumount(char *mntdir, int mntflags, char *looped_file)
{
  int my_mntflags = 0;
  if ((mntflags & PUMOUNT_FORCE) != 0)
    my_mntflags |= MNT_FORCE;

  if (umount2(mntdir, my_mntflags) == -1)
    return -1;

#ifdef USE_LOOP
  if (looped_file != NULL)
  {
    verbose("%s: pumount claims the loop is %s\n", __func__, looped_file);
    if (__clrloop(looped_file) == -1)
      return -1;
  }
  else
  {
    verbose("%s: pumount claims there is no such loop.\n", __func__);
  }
#endif

  errno = 0;
  return 0;
}
示例#18
0
void stop_jffs2(int stop)
{
	struct statfs sf;
#if defined(RTCONFIG_PSISTLOG) || defined(RTCONFIG_JFFS2LOG)
	int restart_syslogd = 0;
#endif

	if (!wait_action_idle(10)) return;

	if ((statfs("/jffs", &sf) == 0) && (sf.f_type != 0x73717368) && (sf.f_type != 0x71736873)) {
		// is mounted
		run_userfile("/jffs", ".autostop", "/jffs", 5);
		run_nvscript("script_autostop", "/jffs", 5);
	}

#if defined(RTCONFIG_PSISTLOG) || defined(RTCONFIG_JFFS2LOG)
	if (!stop && !strncmp(get_syslog_fname(0), "/jffs/", 6)) {
		restart_syslogd = 1;
		stop_syslogd();
		eval("cp", "/jffs/syslog.log", "/jffs/syslog.log-1", "/tmp");
	}
#endif

	notice_set("jffs", "Stopped");
	if (umount("/jffs"))
		umount2("/jffs", MNT_DETACH);
	else
		modprobe_r(JFFS_NAME);

#if defined(RTCONFIG_PSISTLOG) || defined(RTCONFIG_JFFS2LOG)
	if (restart_syslogd)
		start_syslogd();
#endif
}
示例#19
0
static void
term_handler (int sig)
{
	int ret = 0;

	if (unlink (TMPFS_PATH "/kmsg") < 0)
		ret = 1;

	if (umount2 (PROC_PATH, MNT_DETACH) < 0)
		ret = 1;

	if (umount2 (TMPFS_PATH, MNT_DETACH) < 0)
		ret = 1;

	_exit(ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
}
示例#20
0
static void container_unmount_oldroot(char *path)
{
	FILE *mtab;
	struct mntent *mnt;
	char *mntlist[128];
	int i;
	int n = 0;
	char *filesys;

	mtab = setmntent("/proc/mounts", "r");
	if (mtab == NULL) {
		fprintf(stderr, "cannot open /proc/mount");
		return;
	}

	while (n < 128 && (mnt = getmntent(mtab))) {
		if (strncmp(mnt->mnt_dir, path, strlen(path)))
			continue;
		mntlist[n++] = strdup(mnt->mnt_dir);
	}

	endmntent(mtab);

	for (i = n - 1; i >= 0; i--) {
		filesys = mntlist[i];
		fprintf(stdout, "umount %s\n", filesys);
		if (umount(mntlist[i]) < 0 && umount2(mntlist[i],
			   MNT_DETACH) < 0) {
			fprintf(stdout, "umount %s: %s failed\n",
				filesys, strerror(errno));
		}
	}
}
示例#21
0
/**
 * This function is called whenever the process wants to override it's default resolv.conf with a custom one.
 * @param[in] A new resolv.conf file to override the existing resolv.conf in this process
 * @return 0 if success
 * @return errno if failed
 */
int rwnetns_mount_bind_resolv_conf(const char *new_resolv_conf_path)
{
  int fd = open(new_resolv_conf_path, O_RDONLY, 0);
  int ret = 0;
  
  if (fd < 0) {
    return errno;
  }
  close(fd);


  // Make sure any future mounts do not affect any other process.
  if (unshare(CLONE_NEWNS) < 0) {
      return errno;
  }

  // Make sure the resolv.conf mount does not propogate upwards
  if (mount("", "/", "none", MS_SLAVE | MS_REC, NULL) < 0) {
      return errno;
  }

  if (mount(new_resolv_conf_path, RESOLV_CONF_PATH, "none", MS_BIND, NULL) < 0) {
    ret = errno;
    umount2(RESOLV_CONF_PATH, MNT_DETACH);
    return ret;
  }

  return 0;
}
示例#22
0
文件: ipnetns.c 项目: Azzik/iproute2
static int netns_exec(int argc, char **argv)
{
	/* Setup the proper environment for apps that are not netns
	 * aware, and execute a program in that environment.
	 */
	const char *name, *cmd;
	char net_path[MAXPATHLEN];
	int netns;

	if (argc < 1) {
		fprintf(stderr, "No netns name specified\n");
		return EXIT_FAILURE;
	}
	if (argc < 2) {
		fprintf(stderr, "No command specified\n");
		return EXIT_FAILURE;
	}
	name = argv[0];
	cmd = argv[1];
	snprintf(net_path, sizeof(net_path), "%s/%s", NETNS_RUN_DIR, name);
	netns = open(net_path, O_RDONLY);
	if (netns < 0) {
		fprintf(stderr, "Cannot open network namespace \"%s\": %s\n",
			name, strerror(errno));
		return EXIT_FAILURE;
	}
	if (setns(netns, CLONE_NEWNET) < 0) {
		fprintf(stderr, "seting the network namespace \"%s\" failed: %s\n",
			name, strerror(errno));
		return EXIT_FAILURE;
	}

	if (unshare(CLONE_NEWNS) < 0) {
		fprintf(stderr, "unshare failed: %s\n", strerror(errno));
		return EXIT_FAILURE;
	}
	/* Don't let any mounts propogate back to the parent */
	if (mount("", "/", "none", MS_SLAVE | MS_REC, NULL)) {
		fprintf(stderr, "\"mount --make-rslave /\" failed: %s\n",
			strerror(errno));
		return EXIT_FAILURE;
	}
	/* Mount a version of /sys that describes the network namespace */
	if (umount2("/sys", MNT_DETACH) < 0) {
		fprintf(stderr, "umount of /sys failed: %s\n", strerror(errno));
		return EXIT_FAILURE;
	}
	if (mount(name, "/sys", "sysfs", 0, NULL) < 0) {
		fprintf(stderr, "mount of /sys failed: %s\n",strerror(errno));
		return EXIT_FAILURE;
	}

	/* Setup bind mounts for config files in /etc */
	bind_etc(name);

	if (execvp(cmd, argv + 1)  < 0)
		fprintf(stderr, "exec of \"%s\" failed: %s\n",
			cmd, strerror(errno));
	return EXIT_FAILURE;
}
示例#23
0
static int fuse_setup(struct fuse* fuse, gid_t gid, mode_t mask) {
    char opts[256];

    fuse->fd = TEMP_FAILURE_RETRY(open("/dev/fuse", O_RDWR | O_CLOEXEC));
    if (fuse->fd == -1) {
        PLOG(ERROR) << "failed to open fuse device";
        return -1;
    }

    umount2(fuse->dest_path, MNT_DETACH);

    snprintf(opts, sizeof(opts),
            "fd=%i,rootmode=40000,default_permissions,allow_other,user_id=%d,group_id=%d",
            fuse->fd, fuse->global->uid, fuse->global->gid);
    if (mount("/dev/fuse", fuse->dest_path, "fuse", MS_NOSUID | MS_NODEV | MS_NOEXEC | MS_NOATIME,
              opts) == -1) {
        PLOG(ERROR) << "failed to mount fuse filesystem";
        return -1;
    }

    fuse->gid = gid;
    fuse->mask = mask;

    return 0;
}
示例#24
0
static void unmount_and_fsck(const struct mntent *entry) {
    if (strcmp(entry->mnt_type, "f2fs") && strcmp(entry->mnt_type, "ext4"))
        return;

    /* First, lazily unmount the directory. This unmount request finishes when
     * all processes that open a file or directory in |entry->mnt_dir| exit.
     */
    TEMP_FAILURE_RETRY(umount2(entry->mnt_dir, MNT_DETACH));

    /* Next, kill all processes except init, kthreadd, and kthreadd's
     * children to finish the lazy unmount. Killing all processes here is okay
     * because this callback function is only called right before reboot().
     * It might be cleaner to selectively kill processes that actually use
     * |entry->mnt_dir| rather than killing all, probably by reusing a function
     * like killProcessesWithOpenFiles() in vold/, but the selinux policy does
     * not allow init to scan /proc/<pid> files which the utility function
     * heavily relies on. The policy does not allow the process to execute
     * killall/pkill binaries either. Note that some processes might
     * automatically restart after kill(), but that is not really a problem
     * because |entry->mnt_dir| is no longer visible to such new processes.
     */
    ServiceManager::GetInstance().ForEachService([] (Service* s) { s->Stop(); });
    TEMP_FAILURE_RETRY(kill(-1, SIGKILL));

    int count = 0;
    while (count++ < UNMOUNT_CHECK_TIMES) {
        int fd = TEMP_FAILURE_RETRY(open(entry->mnt_fsname, O_RDONLY | O_EXCL));
        if (fd >= 0) {
            /* |entry->mnt_dir| has sucessfully been unmounted. */
            close(fd);
            break;
        } else if (errno == EBUSY) {
            /* Some processes using |entry->mnt_dir| are still alive. Wait for a
             * while then retry.
             */
            TEMP_FAILURE_RETRY(
                usleep(UNMOUNT_CHECK_MS * 1000 / UNMOUNT_CHECK_TIMES));
            continue;
        } else {
            /* Cannot open the device. Give up. */
            return;
        }
    }

    int st;
    if (!strcmp(entry->mnt_type, "f2fs")) {
        const char *f2fs_argv[] = {
            "/system/bin/fsck.f2fs", "-f", entry->mnt_fsname,
        };
        android_fork_execvp_ext(ARRAY_SIZE(f2fs_argv), (char **)f2fs_argv,
                                &st, true, LOG_KLOG, true, NULL, NULL, 0);
    } else if (!strcmp(entry->mnt_type, "ext4")) {
        const char *ext4_argv[] = {
            "/system/bin/e2fsck", "-f", "-y", entry->mnt_fsname,
        };
        android_fork_execvp_ext(ARRAY_SIZE(ext4_argv), (char **)ext4_argv,
                                &st, true, LOG_KLOG, true, NULL, NULL, 0);
    }
}
示例#25
0
int generic_umount(char *mntbuf)
{
    if (!mntbuf)
    {   errprintf("invalid param: mntbuf is null\n");
        return -1;
    }
    msgprintf(MSG_DEBUG1, "unmount_partition(%s)\n", mntbuf);
    return umount2(mntbuf, 0);
}
示例#26
0
文件: lxcfs.c 项目: Blub/lxcfs
static bool umount_if_mounted(void)
{
	if (umount2(basedir, MNT_DETACH) < 0 && errno != EINVAL) {
		fprintf(stderr, "failed to umount %s: %s\n", basedir,
			strerror(errno));
		return false;
	}
	return true;
}
示例#27
0
static int do_unmount(const char *mnt, int quiet, int lazy)
{
    int res = umount2(mnt, lazy ? 2 : 0);
    if (res == -1) {
        if (!quiet)
            fprintf(stderr, "%s: failed to unmount %s: %s\n",
                    progname, mnt, strerror(errno));
    }
    return res;
}
示例#28
0
int ui_umount(const char * mnt) {
  int rc;

  if((rc = umount2(mnt, MNT_DETACH)) != 0) {
    fprintf(stderr, "Failed to unmount %s.\n", mnt);
    fprintf(stderr, "Error (%d) %s\n", errno, strerror(errno));
  }

  return rc;
}
示例#29
0
文件: ipnetns.c 项目: Tuccro/LightVPN
static int netns_exec(int argc, char **argv)
{
	/* Setup the proper environment for apps that are not netns
	 * aware, and execute a program in that environment.
	 */
	const char *name, *cmd;
	char net_path[MAXPATHLEN];
	int netns;

	if (argc < 1) {
		fprintf(stderr, "No netns name specified\n");
		return -1;
	}
	if (argc < 2) {
		fprintf(stderr, "No cmd specified\n");
		return -1;
	}
	name = argv[0];
	cmd = argv[1];
	snprintf(net_path, sizeof(net_path), "%s/%s", NETNS_RUN_DIR, name);
	netns = open(net_path, O_RDONLY);
	if (netns < 0) {
		fprintf(stderr, "Cannot open network namespace: %s\n",
			strerror(errno));
		return -1;
	}
	if (setns(netns, CLONE_NEWNET) < 0) {
		fprintf(stderr, "seting the network namespace failed: %s\n",
			strerror(errno));
		return -1;
	}
/*
	if (unshare(CLONE_NEWNS) < 0) {
		fprintf(stderr, "unshare failed: %s\n", strerror(errno));
		return -1;
	}
*/
	/* Mount a version of /sys that describes the network namespace */
	if (umount2("/sys", MNT_DETACH) < 0) {
		fprintf(stderr, "umount of /sys failed: %s\n", strerror(errno));
		return -1;
	}
	if (mount(name, "/sys", "sysfs", 0, NULL) < 0) {
		fprintf(stderr, "mount of /sys failed: %s\n",strerror(errno));
		return -1;
	}

	/* Setup bind mounts for config files in /etc */
	bind_etc(name);

	if (execvp(cmd, argv + 1)  < 0)
		fprintf(stderr, "exec of %s failed: %s\n",
			cmd, strerror(errno));
	exit(-1);
}
示例#30
0
文件: attach.c 项目: ArikaChen/lxc
int lxc_attach_remount_sys_proc()
{
	int ret;

	ret = unshare(CLONE_NEWNS);
	if (ret < 0) {
		SYSERROR("failed to unshare mount namespace");
		return -1;
	}

	/* assume /proc is always mounted, so remount it */
	ret = umount2("/proc", MNT_DETACH);
	if (ret < 0) {
		SYSERROR("failed to unmount /proc");
		return -1;
	}

	ret = mount("none", "/proc", "proc", 0, NULL);
	if (ret < 0) {
		SYSERROR("failed to remount /proc");
		return -1;
	}

	/* try to umount /sys - if it's not a mount point,
	 * we'll get EINVAL, then we ignore it because it
	 * may not have been mounted in the first place
	 */
	ret = umount2("/sys", MNT_DETACH);
	if (ret < 0 && errno != EINVAL) {
		SYSERROR("failed to unmount /sys");
		return -1;
	} else if (ret == 0) {
		/* remount it */
		ret = mount("none", "/sys", "sysfs", 0, NULL);
		if (ret < 0) {
			SYSERROR("failed to remount /sys");
			return -1;
		}
	}

	return 0;
}