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/* mountlist.c -- return a list of mounted filesystems
Copyright (C) 1991, 1992 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
#include <config.h>
#include <glib.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/mount.h>
#include <string.h>
#include <glibtop.h>
#include <glibtop/mountlist.h>
/* A mount table entry. */
struct mount_entry
{
char *me_devname; /* Device node pathname, including "/dev/". */
char *me_mountdir; /* Mount point directory pathname. */
char *me_type; /* "nfs", "4.2", etc. */
dev_t me_dev; /* Device number of me_mountdir. */
struct mount_entry *me_next;
};
static struct mount_entry *read_filesystem_list (void);
/* Return a list of the currently mounted filesystems, or NULL on error.
Add each entry to the tail of the list so that they stay in order.
*/
static struct mount_entry *
read_filesystem_list (void)
{
struct mount_entry *mount_list;
struct mount_entry *me;
struct mount_entry *mtail;
/* Start the list off with a dummy entry. */
me = g_new (struct mount_entry, 1);
me->me_next = NULL;
mount_list = mtail = me;
{
struct statfs *fsp;
int entries;
entries = getmntinfo (&fsp, MNT_NOWAIT);
if (entries < 0)
return NULL;
while (entries-- > 0)
{
me = (struct mount_entry *) g_malloc (sizeof (struct mount_entry));
me->me_devname = g_strdup (fsp->f_mntfromname);
me->me_mountdir = g_strdup (fsp->f_mntonname);
me->me_type = g_strdup (fsp->f_fstypename);
me->me_dev = (dev_t) -1; /* Magic; means not known yet. */
me->me_next = NULL;
/* Add to the linked list. */
mtail->me_next = me;
mtail = me;
fsp++;
}
}
/* Free the dummy head. */
me = mount_list;
mount_list = mount_list->me_next;
g_free (me);
return mount_list;
}
static gboolean ignore_mount_entry(const struct mount_entry *me)
{
/* keep sorted */
static const char ignored[][17] = {
"autofs",
"devfs",
"fusectl",
"linprocfs",
"linsysfs",
"mfs",
"none",
"nfs",
"nullfs",
"nwfs",
"portalfs",
"proc",
"procfs",
"smbfs",
"tmpfs",
"unionfs",
"unknown"
};
typedef int (*Comparator)(const void*, const void*);
return bsearch(me->me_type,
ignored, G_N_ELEMENTS(ignored), sizeof ignored[0],
(Comparator) strcmp) != NULL;
}
glibtop_mountentry *
glibtop_get_mountlist_s (glibtop *server, glibtop_mountlist *buf, int all_fs)
{
struct mount_entry *entries, *cur, *next;
GArray *mount_array = g_array_new(FALSE, FALSE,
sizeof(glibtop_mountentry));
glibtop_init_r (&server, 0, 0);
memset (buf, 0, sizeof (glibtop_mountlist));
/* Read filesystem list. */
if((entries = read_filesystem_list ()) == NULL)
return NULL;
for (cur = &entries[0]; cur != NULL; cur = next) {
if(all_fs || !ignore_mount_entry(cur)) {
/* add a new glibtop_mountentry */
glibtop_mountentry e;
g_strlcpy(e.devname, cur->me_devname, sizeof e.devname);
g_strlcpy(e.mountdir, cur->me_mountdir, sizeof e.mountdir);
g_strlcpy(e.type, cur->me_type, sizeof e.type);
e.dev = cur->me_dev;
g_array_append_val(mount_array, e);
}
/* free current mount_entry and move to the next */
next = cur->me_next;
g_free(cur->me_devname);
g_free(cur->me_mountdir);
g_free(cur->me_type);
g_free(cur);
}
buf->size = sizeof (glibtop_mountentry);
buf->number = mount_array->len;
buf->total = buf->number * buf->size;
buf->flags = (1 << GLIBTOP_MOUNTLIST_SIZE)
| (1 << GLIBTOP_MOUNTLIST_NUMBER)
| (1 << GLIBTOP_MOUNTLIST_TOTAL);
return (glibtop_mountentry*) g_array_free(mount_array, FALSE);
}
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