mountlist.c

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	mtail = &me->me_next;
      }
  }
#endif /* MOUNTED_GETMNTINFO */

#ifdef MOUNTED_GETMNT		/* Ultrix.  */
  {
    int offset = 0;
    int val;
    struct fs_data fsd;

    while (errno = 0,
	   0 < (val = getmnt (&offset, &fsd, sizeof (fsd), NOSTAT_MANY,
			      (char *) 0)))
      {
	me = (struct mount_entry *) xmalloc (sizeof (struct mount_entry));
	me->me_devname = xstrdup (fsd.fd_req.devname);
	me->me_mountdir = xstrdup (fsd.fd_req.path);
	me->me_type = gt_names[fsd.fd_req.fstype];
	me->me_dummy = ME_DUMMY (me->me_devname, me->me_type);
	me->me_remote = ME_REMOTE (me->me_devname, me->me_type);
	me->me_dev = fsd.fd_req.dev;

	/* Add to the linked list. */
	*mtail = me;
	mtail = &me->me_next;
      }
    if (val < 0)
      goto free_then_fail;
  }
#endif /* MOUNTED_GETMNT. */

#if defined MOUNTED_FS_STAT_DEV /* BeOS */
  {
    /* The next_dev() and fs_stat_dev() system calls give the list of
       all filesystems, including the information returned by statvfs()
       (fs type, total blocks, free blocks etc.), but without the mount
       point. But on BeOS all filesystems except / are mounted in the
       rootfs, directly under /.
       The directory name of the mount point is often, but not always,
       identical to the volume name of the device.
       We therefore get the list of subdirectories of /, and the list
       of all filesystems, and match the two lists.  */

    DIR *dirp;
    struct rootdir_entry
      {
        char *name;
        dev_t dev;
        ino_t ino;
        struct rootdir_entry *next;
      };
    struct rootdir_entry *rootdir_list;
    struct rootdir_entry **rootdir_tail;
    int32 pos;
    dev_t dev;
    fs_info fi;

    /* All volumes are mounted in the rootfs, directly under /. */
    rootdir_list = NULL;
    rootdir_tail = &rootdir_list;
    dirp = opendir ("/");
    if (dirp)
      {
        struct dirent *d;

        while ((d = readdir (dirp)) != NULL)
          {
            char *name;
            struct stat statbuf;

            if (strcmp (d->d_name, "..") == 0)
              continue;

            if (strcmp (d->d_name, ".") == 0)
              name = xstrdup ("/");
            else
              {
                name = xmalloc (1 + strlen (d->d_name) + 1);
                name[0] = '/';
                strcpy (name + 1, d->d_name);
              }

            if (lstat (name, &statbuf) >= 0 && S_ISDIR (statbuf.st_mode))
              {
                struct rootdir_entry *re;

                re = (struct rootdir_entry *) xmalloc (sizeof (struct rootdir_entry));
                re->name = name;
                re->dev = statbuf.st_dev;
                re->ino = statbuf.st_ino;

                /* Add to the linked list.  */
                *rootdir_tail = re;
                rootdir_tail = &re->next;
              }
            else
              free (name);
          }
        closedir (dirp);
      }
    *rootdir_tail = NULL;

    for (pos = 0; (dev = next_dev (&pos)) >= 0; )
      if (fs_stat_dev (dev, &fi) >= 0)
        {
          /* Note: fi.dev == dev. */
          struct rootdir_entry *re;

          for (re = rootdir_list; re; re = re->next)
            if (re->dev == fi.dev && re->ino == fi.root)
              break;

          me = (struct mount_entry *) xmalloc (sizeof (struct mount_entry));
          me->me_devname = xstrdup (fi.device_name[0] != '\0' ? fi.device_name : fi.fsh_name);
          me->me_mountdir = xstrdup (re != NULL ? re->name : fi.fsh_name);
          me->me_type = xstrdup (fi.fsh_name);
          me->me_dev = fi.dev;
          me->me_dummy = 0;
          me->me_remote = (fi.flags & B_FS_IS_SHARED) != 0;

          /* Add to the linked list. */
          *mtail = me;
          mtail = &me->me_next;
        }
    *mtail = NULL;

    while (rootdir_list != NULL)
      {
        struct rootdir_entry *re = rootdir_list;
        rootdir_list = re->next;
        free (re->name);
        free (re);
      }
  }
#endif /* MOUNTED_FS_STAT_DEV */

#if defined MOUNTED_GETFSSTAT	/* __alpha running OSF_1 */
  {
    int numsys, counter, bufsize;
    struct statfs *stats;

    numsys = getfsstat ((struct statfs *)0, 0L, MNT_WAIT);
    if (numsys < 0)
      return (NULL);

    bufsize = (1 + numsys) * sizeof (struct statfs);
    stats = (struct statfs *)xmalloc (bufsize);
    numsys = getfsstat (stats, bufsize, MNT_WAIT);

    if (numsys < 0)
      {
	free (stats);
	return (NULL);
      }

    for (counter = 0; counter < numsys; counter++)
      {
	me = (struct mount_entry *) xmalloc (sizeof (struct mount_entry));
	me->me_devname = xstrdup (stats[counter].f_mntfromname);
	me->me_mountdir = xstrdup (stats[counter].f_mntonname);
	me->me_type = xstrdup (FS_TYPE (stats[counter]));
	me->me_dummy = ME_DUMMY (me->me_devname, me->me_type);
	me->me_remote = ME_REMOTE (me->me_devname, me->me_type);
	me->me_dev = (dev_t) -1;	/* Magic; means not known yet. */

	/* Add to the linked list. */
	*mtail = me;
	mtail = &me->me_next;
      }

    free (stats);
  }
#endif /* MOUNTED_GETFSSTAT */

#if defined MOUNTED_FREAD || defined MOUNTED_FREAD_FSTYP /* SVR[23].  */
  {
    struct mnttab mnt;
    char *table = "/etc/mnttab";
    FILE *fp;

    fp = fopen (table, "r");
    if (fp == NULL)
      return NULL;

    while (fread (&mnt, sizeof mnt, 1, fp) > 0)
      {
	me = (struct mount_entry *) xmalloc (sizeof (struct mount_entry));
# ifdef GETFSTYP			/* SVR3.  */
	me->me_devname = xstrdup (mnt.mt_dev);
# else
	me->me_devname = xmalloc (strlen (mnt.mt_dev) + 6);
	strcpy (me->me_devname, "/dev/");
	strcpy (me->me_devname + 5, mnt.mt_dev);
# endif
	me->me_mountdir = xstrdup (mnt.mt_filsys);
	me->me_dev = (dev_t) -1;	/* Magic; means not known yet. */
	me->me_type = "";
# ifdef GETFSTYP			/* SVR3.  */
	if (need_fs_type)
	  {
	    struct statfs fsd;
	    char typebuf[FSTYPSZ];

	    if (statfs (me->me_mountdir, &fsd, sizeof fsd, 0) != -1
		&& sysfs (GETFSTYP, fsd.f_fstyp, typebuf) != -1)
	      me->me_type = xstrdup (typebuf);
	  }
# endif
	me->me_dummy = ME_DUMMY (me->me_devname, me->me_type);
	me->me_remote = ME_REMOTE (me->me_devname, me->me_type);

	/* Add to the linked list. */
	*mtail = me;
	mtail = &me->me_next;
      }

    if (ferror (fp))
      {
	int saved_errno = errno;
	fclose (fp);
	errno = saved_errno;
	goto free_then_fail;
      }

    if (fclose (fp) == EOF)
      goto free_then_fail;
  }
#endif /* MOUNTED_FREAD || MOUNTED_FREAD_FSTYP.  */

#ifdef MOUNTED_GETMNTTBL	/* DolphinOS goes it's own way */
  {
    struct mntent **mnttbl=getmnttbl(),**ent;
    for (ent=mnttbl;*ent;ent++)
      {
	me = (struct mount_entry *) xmalloc (sizeof (struct mount_entry));
	me->me_devname = xstrdup ( (*ent)->mt_resource);
	me->me_mountdir = xstrdup( (*ent)->mt_directory);
	me->me_type =  xstrdup ((*ent)->mt_fstype);
	me->me_dummy = ME_DUMMY (me->me_devname, me->me_type);
	me->me_remote = ME_REMOTE (me->me_devname, me->me_type);
	me->me_dev = (dev_t) -1;	/* Magic; means not known yet. */

	/* Add to the linked list. */
	*mtail = me;
	mtail = &me->me_next;
      }
    endmnttbl();
  }
#endif

#ifdef MOUNTED_GETMNTENT2	/* SVR4.  */
  {
    struct mnttab mnt;
    char *table = MNTTAB;
    FILE *fp;
    int ret;
    int lockfd = -1;

# if defined F_RDLCK && defined F_SETLKW
    /* MNTTAB_LOCK is a macro name of our own invention; it's not present in
       e.g. Solaris 2.6.  If the SVR4 folks ever define a macro
       for this file name, we should use their macro name instead.
       (Why not just lock MNTTAB directly?  We don't know.)  */
#  ifndef MNTTAB_LOCK
#   define MNTTAB_LOCK "/etc/.mnttab.lock"
#  endif
    lockfd = open (MNTTAB_LOCK, O_RDONLY);
    if (0 <= lockfd)
      {
	struct flock flock;
	flock.l_type = F_RDLCK;
	flock.l_whence = SEEK_SET;
	flock.l_start = 0;
	flock.l_len = 0;
	while (fcntl (lockfd, F_SETLKW, &flock) == -1)
	  if (errno != EINTR)
	    {
	      int saved_errno = errno;
	      close (lockfd);
	      errno = saved_errno;
	      return NULL;
	    }
      }
    else if (errno != ENOENT)
      return NULL;
# endif

    errno = 0;
    fp = fopen (table, "r");
    if (fp == NULL)
      ret = errno;
    else
      {
	while ((ret = getmntent (fp, &mnt)) == 0)
	  {
	    me = (struct mount_entry *) xmalloc (sizeof (struct mount_entry));
	    me->me_devname = xstrdup (mnt.mnt_special);
	    me->me_mountdir = xstrdup (mnt.mnt_mountp);
	    me->me_type = xstrdup (mnt.mnt_fstype);
	    me->me_dummy = MNT_IGNORE (&mnt) != 0;
	    me->me_remote = ME_REMOTE (me->me_devname, me->me_type);
	    me->me_dev = (dev_t) -1;	/* Magic; means not known yet. */

	    /* Add to the linked list. */
	    *mtail = me;
	    mtail = &me->me_next;
	  }

	ret = fclose (fp) == EOF ? errno : 0 < ret ? 0 : -1;
      }

    if (0 <= lockfd && close (lockfd) != 0)
      ret = errno;

    if (0 <= ret)
      {
	errno = ret;
	goto free_then_fail;
      }
  }
#endif /* MOUNTED_GETMNTENT2.  */

#ifdef MOUNTED_VMOUNT		/* AIX.  */
  {
    int bufsize;
    char *entries, *thisent;
    struct vmount *vmp;

    /* Ask how many bytes to allocate for the mounted filesystem info.  */
    mntctl (MCTL_QUERY, sizeof bufsize, (struct vmount *) &bufsize);
    entries = xmalloc (bufsize);

    /* Get the list of mounted filesystems.  */
    mntctl (MCTL_QUERY, bufsize, (struct vmount *) entries);

    for (thisent = entries; thisent < entries + bufsize;
	 thisent += vmp->vmt_length)
      {
	char *options, *ignore;

	vmp = (struct vmount *) thisent;
	me = (struct mount_entry *) xmalloc (sizeof (struct mount_entry));
	if (vmp->vmt_flags & MNT_REMOTE)
	  {
	    char *host, *path;

	    me->me_remote = 1;
	    /* Prepend the remote pathname.  */
	    host = thisent + vmp->vmt_data[VMT_HOSTNAME].vmt_off;
	    path = thisent + vmp->vmt_data[VMT_OBJECT].vmt_off;
	    me->me_devname = xmalloc (strlen (host) + strlen (path) + 2);
	    strcpy (me->me_devname, host);
	    strcat (me->me_devname, ":");
	    strcat (me->me_devname, path);
	  }
	else
	  {
	    me->me_remote = 0;
	    me->me_devname = xstrdup (thisent +
				      vmp->vmt_data[VMT_OBJECT].vmt_off);
	  }
	me->me_mountdir = xstrdup (thisent + vmp->vmt_data[VMT_STUB].vmt_off);
	me->me_type = xstrdup (fstype_to_string (vmp->vmt_gfstype));
	options = thisent + vmp->vmt_data[VMT_ARGS].vmt_off;
	ignore = strstr (options, "ignore");
	me->me_dummy = (ignore
			&& (ignore == options || ignore[-1] == ',')
			&& (ignore[sizeof "ignore" - 1] == ','
			    || ignore[sizeof "ignore" - 1] == '\0'));
	me->me_dev = (dev_t) -1; /* vmt_fsid might be the info we want.  */

	/* Add to the linked list. */
	*mtail = me;
	mtail = &me->me_next;
      }
    free (entries);
  }
#endif /* MOUNTED_VMOUNT. */

  *mtail = NULL;
  return mount_list;


 free_then_fail:
  {
    int saved_errno = errno;
    *mtail = NULL;

    while (mount_list)
      {
	me = mount_list->me_next;
	free (mount_list->me_devname);
	free (mount_list->me_mountdir);
	/* FIXME: me_type is not always malloced.  */
	free (mount_list);
	mount_list = me;
      }

    errno = saved_errno;
    return NULL;
  }
}