コード例 #1
0
ファイル: mount_fs.c プロジェクト: enukane/netbsd-src
int
mount_fs(mntent_t *mnt, int flags, caddr_t mnt_data, int retry, MTYPE_TYPE type, u_long nfs_version, const char *nfs_proto, const char *mnttabname, int on_autofs)
{
  int error = 0;
#ifdef MOUNT_TABLE_ON_FILE
  char *zopts = NULL, *xopts = NULL;
  size_t l;
#endif /* MOUNT_TABLE_ON_FILE */
  char *mnt_dir = NULL;

#ifdef NEED_AUTOFS_SPACE_HACK
  char *old_mnt_dir = NULL;
  /* perform space hack */
  if (on_autofs) {
    old_mnt_dir = mnt->mnt_dir;
    mnt->mnt_dir = mnt_dir = autofs_strdup_space_hack(old_mnt_dir);
  } else
#endif /* NEED_AUTOFS_SPACE_HACK */
    mnt_dir = strdup(mnt->mnt_dir);

  dlog("'%s' fstype " MTYPE_PRINTF_TYPE " (%s) flags %#x (%s)",
       mnt_dir, type, mnt->mnt_type, flags, mnt->mnt_opts);

again:
  error = MOUNT_TRAP(type, mnt, flags, mnt_data);

  if (error < 0) {
    plog(XLOG_ERROR, "'%s': mount: %m", mnt_dir);
    /*
     * The following code handles conditions which shouldn't
     * occur.  They are possible either because amd screws up
     * in preparing for the mount, or because some human
     * messed with the mount point.  Both have been known to
     * happen. -- stolcke 2/22/95
     */
    if (errno == EBUSY) {
      /*
       * Also, sometimes unmount isn't called, e.g., because
       * our mountlist is garbled.  This leaves old mount
       * points around which need to be removed before we
       * can mount something new in their place.
       */
      errno = umount_fs(mnt_dir, mnttabname, on_autofs);
      if (errno != 0)
	plog(XLOG_ERROR, "'%s': umount: %m", mnt_dir);
      else {
	plog(XLOG_WARNING, "extra umount required for '%s'", mnt_dir);
	error = MOUNT_TRAP(type, mnt, flags, mnt_data);
      }
    }
  }

  if (error < 0 && --retry > 0) {
    sleep(1);
    goto again;
  }

#ifdef NEED_AUTOFS_SPACE_HACK
  /* Undo space hack */
  if (on_autofs)
    mnt->mnt_dir = old_mnt_dir;
#endif /* NEED_AUTOFS_SPACE_HACK */

  if (error < 0) {
    error = errno;
    goto out;
  }

#ifdef MOUNT_TABLE_ON_FILE
  /*
   * Allocate memory for options:
   *        dev=..., vers={2,3}, proto={tcp,udp}
   */
  l = strlen(mnt->mnt_opts) + 48;
  zopts = (char *) xmalloc(l);

  /* copy standard options */
  xopts = mnt->mnt_opts;

  xstrlcpy(zopts, xopts, l);

# ifdef MNTTAB_OPT_DEV
  {
    /* add the extra dev= field to the mount table */
    struct stat stb;
    if (lstat(mnt_dir, &stb) == 0) {
      char optsbuf[48];
      if (sizeof(stb.st_dev) == 2) /* e.g. SunOS 4.1 */
	xsnprintf(optsbuf, sizeof(optsbuf), "%s=%04lx",
		  MNTTAB_OPT_DEV, (u_long) stb.st_dev & 0xffff);
      else			/* e.g. System Vr4 */
	xsnprintf(optsbuf, sizeof(optsbuf), "%s=%08lx",
		  MNTTAB_OPT_DEV, (u_long) stb.st_dev);
      append_opts(zopts, l, optsbuf);
    }
  }
# endif /* MNTTAB_OPT_DEV */

# if defined(HAVE_FS_NFS3) && defined(MNTTAB_OPT_VERS)
  /*
   * add the extra vers={2,3} field to the mount table,
   * unless already specified by user
   */
   if (nfs_version == NFS_VERSION3 &&
       hasmntval(mnt, MNTTAB_OPT_VERS) != NFS_VERSION3) {
     char optsbuf[48];
     xsnprintf(optsbuf, sizeof(optsbuf),
	       "%s=%d", MNTTAB_OPT_VERS, NFS_VERSION3);
     append_opts(zopts, l, optsbuf);
   }
# endif /* defined(HAVE_FS_NFS3) && defined(MNTTAB_OPT_VERS) */

# ifdef MNTTAB_OPT_PROTO
  /*
   * add the extra proto={tcp,udp} field to the mount table,
   * unless already specified by user.
   */
  if (nfs_proto && !amu_hasmntopt(mnt, MNTTAB_OPT_PROTO)) {
    char optsbuf[48];
    xsnprintf(optsbuf, sizeof(optsbuf), "%s=%s", MNTTAB_OPT_PROTO, nfs_proto);
    append_opts(zopts, l, optsbuf);
  }
# endif /* MNTTAB_OPT_PROTO */

  /* finally, store the options into the mount table structure */
  mnt->mnt_opts = zopts;

  /*
   * Additional fields in mntent_t
   * are fixed up here
   */
# ifdef HAVE_MNTENT_T_MNT_CNODE
  mnt->mnt_cnode = 0;
# endif /* HAVE_MNTENT_T_MNT_CNODE */

# ifdef HAVE_MNTENT_T_MNT_RO
  mnt->mnt_ro = (amu_hasmntopt(mnt, MNTTAB_OPT_RO) != NULL);
# endif /* HAVE_MNTENT_T_MNT_RO */

# ifdef HAVE_MNTENT_T_MNT_TIME
#  ifdef HAVE_MNTENT_T_MNT_TIME_STRING
  {				/* allocate enough space for a long */
    size_t l = 13 * sizeof(char);
    char *str = (char *) xmalloc(l);
    xsnprintf(str, l, "%ld", time((time_t *) NULL));
    mnt->mnt_time = str;
  }
#  else /* not HAVE_MNTENT_T_MNT_TIME_STRING */
  mnt->mnt_time = time((time_t *) NULL);
#  endif /* not HAVE_MNTENT_T_MNT_TIME_STRING */
# endif /* HAVE_MNTENT_T_MNT_TIME */

  write_mntent(mnt, mnttabname);

# ifdef MNTTAB_OPT_DEV
  if (xopts) {
    XFREE(mnt->mnt_opts);
    mnt->mnt_opts = xopts;
  }
# endif /* MNTTAB_OPT_DEV */
#endif /* MOUNT_TABLE_ON_FILE */

 out:
  XFREE(mnt_dir);
  return error;
}
コード例 #2
0
ファイル: mount_fs.c プロジェクト: AzerTyQsdF/osx
int
mount_fs2(mntent_t *mnt, char *real_mntdir, int flags, caddr_t mnt_data, int retry, MTYPE_TYPE type, u_long nfs_version, const char *nfs_proto, const char *mnttabname)
{
  int error = 0;
#ifdef MOUNT_TABLE_ON_FILE
# ifdef MNTTAB_OPT_DEV
  struct stat stb;
# endif /* MNTTAB_OPT_DEV */
  char *zopts = NULL, *xopts = NULL;
# if defined(MNTTAB_OPT_DEV) || (defined(HAVE_FS_NFS3) && defined(MNTTAB_OPT_VERS)) || defined(MNTTAB_OPT_PROTO)
  char optsbuf[48];
# endif /* defined(MNTTAB_OPT_DEV) || (defined(HAVE_FS_NFS3) && defined(MNTTAB_OPT_VERS)) || defined(MNTTAB_OPT_PROTO) */
#endif /* MOUNT_TABLE_ON_FILE */

  char *old_mnt_dir;

  old_mnt_dir = mnt->mnt_dir;
  mnt->mnt_dir = real_mntdir;

  amuDebug(D_FULL) {
    dlog("'%s' fstype " MTYPE_PRINTF_TYPE " (%s) flags %#x (%s)",
	 mnt->mnt_dir, type, mnt->mnt_type, flags, mnt->mnt_opts);
  }

again:
  clock_valid = 0;

  error = MOUNT_TRAP(type, mnt, flags, mnt_data);

  if (error < 0) {
    plog(XLOG_ERROR, "%s: mount: %m", mnt->mnt_dir);
    /*
     * The following code handles conditions which shouldn't
     * occur.  They are possible either because amd screws up
     * in preparing for the mount, or because some human
     * messed with the mount point.  Both have been known to
     * happen. -- stolcke 2/22/95
     */
    if (errno == ENOENT) {
      /*
       * Occasionally the mount point vanishes, probably
       * due to some race condition.  Just recreate it
       * as necessary.
       */
      errno = mkdirs(mnt->mnt_dir, 0555);
      if (errno != 0 && errno != EEXIST)
	plog(XLOG_ERROR, "'%s': mkdirs: %m", mnt->mnt_dir);
      else {
	plog(XLOG_WARNING, "extra mkdirs required for '%s'",
	     mnt->mnt_dir);
	error = MOUNT_TRAP(type, mnt, flags, mnt_data);
      }
    } else if (errno == EBUSY) {
      /*
       * Also, sometimes unmount isn't called, e.g., because
       * our mountlist is garbled.  This leaves old mount
       * points around which need to be removed before we
       * can mount something new in their place.
       */
      errno = umount_fs2(old_mnt_dir, mnt->mnt_dir, mnttabname);
      if (errno != 0)
	plog(XLOG_ERROR, "'%s': umount: %m", mnt->mnt_dir);
      else {
	plog(XLOG_WARNING, "extra umount required for '%s'",
	     mnt->mnt_dir);
	error = MOUNT_TRAP(type, mnt, flags, mnt_data);
      }
    }
  }

  if (error < 0 && --retry > 0) {
    sleep(1);
    goto again;
  }
  if (error < 0) {
    return errno;
  }

#ifdef MOUNT_TABLE_ON_FILE
  /*
   * Allocate memory for options:
   *        dev=..., vers={2,3}, proto={tcp,udp}
   */
  zopts = (char *) xmalloc(strlen(mnt->mnt_opts) + 48);

  /* copy standard options */
  xopts = mnt->mnt_opts;

  strcpy(zopts, xopts);

# ifdef MNTTAB_OPT_DEV
  /* add the extra dev= field to the mount table */
  if (lstat(mnt->mnt_dir, &stb) == 0) {
    if (sizeof(stb.st_dev) == 2) /* e.g. SunOS 4.1 */
      sprintf(optsbuf, "%s=%04lx",
	      MNTTAB_OPT_DEV, (u_long) stb.st_dev & 0xffff);
    else			/* e.g. System Vr4 */
      sprintf(optsbuf, "%s=%08lx",
	      MNTTAB_OPT_DEV, (u_long) stb.st_dev);
    append_opts(zopts, optsbuf);
  }
# endif /* MNTTAB_OPT_DEV */

  mnt->mnt_dir = old_mnt_dir;

# if defined(HAVE_FS_NFS3) && defined(MNTTAB_OPT_VERS)
  /*
   * add the extra vers={2,3} field to the mount table,
   * unless already specified by user
   */
   if (nfs_version == NFS_VERSION3 &&
       hasmntval(mnt, MNTTAB_OPT_VERS) != NFS_VERSION3) {
     sprintf(optsbuf, "%s=%d", MNTTAB_OPT_VERS, NFS_VERSION3);
     append_opts(zopts, optsbuf);
   }
# endif /* defined(HAVE_FS_NFS3) && defined(MNTTAB_OPT_VERS) */

# ifdef MNTTAB_OPT_PROTO
  /*
   * add the extra proto={tcp,udp} field to the mount table,
   * unless already specified by user.
   */
  if (nfs_proto && !hasmntopt(mnt, MNTTAB_OPT_PROTO)) {
    sprintf(optsbuf, "%s=%s", MNTTAB_OPT_PROTO, nfs_proto);
    append_opts(zopts, optsbuf);
  }
# endif /* MNTTAB_OPT_PROTO */

  /* finally, store the options into the mount table structure */
  mnt->mnt_opts = zopts;

  /*
   * Additional fields in mntent_t
   * are fixed up here
   */
# ifdef HAVE_MNTENT_T_MNT_CNODE
  mnt->mnt_cnode = 0;
# endif /* HAVE_MNTENT_T_MNT_CNODE */

# ifdef HAVE_MNTENT_T_MNT_RO
  mnt->mnt_ro = (hasmntopt(mnt, MNTTAB_OPT_RO) != NULL);
# endif /* HAVE_MNTENT_T_MNT_RO */

# ifdef HAVE_MNTENT_T_MNT_TIME
#  ifdef HAVE_MNTENT_T_MNT_TIME_STRING
  {				/* allocate enough space for a long */
    char *str = (char *) xmalloc(13 * sizeof(char));
    sprintf(str, "%ld", time((time_t *) NULL));
    mnt->mnt_time = str;
  }
#  else /* not HAVE_MNTENT_T_MNT_TIME_STRING */
  mnt->mnt_time = time((time_t *) NULL);
#  endif /* not HAVE_MNTENT_T_MNT_TIME_STRING */
# endif /* HAVE_MNTENT_T_MNT_TIME */

  write_mntent(mnt, mnttabname);

# ifdef MNTTAB_OPT_DEV
  if (xopts) {
    XFREE(mnt->mnt_opts);
    mnt->mnt_opts = xopts;
  }
# endif /* MNTTAB_OPT_DEV */
#endif /* MOUNT_TABLE_ON_FILE */

  return 0;
}