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/* mountlist.c -- return a list of mounted filesystems
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Copyright (C) 1991, 1992 Free Software Foundation, Inc.
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This file is a fork of sysdeps/common/mountlist.c.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation,
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Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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/*
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Local Variables:
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mode: C
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c-file-style: "gnu"
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End:
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*/
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#include <config.h>
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#include <stdio.h>
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#include <mntent.h>
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#include <glibtop.h>
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#include <glibtop/mountlist.h>
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#include <glibtop/error.h>
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/* IgnoreList */
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typedef struct
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{
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GHashTable *table;
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} IgnoreList;
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static IgnoreList*
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ignore_list_new(void)
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{
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IgnoreList* ig;
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ig = g_new(IgnoreList, 1);
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ig->table = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, NULL);
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return ig;
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}
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static void
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ignore_list_delete(IgnoreList* ig)
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{
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if (ig) {
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g_hash_table_destroy(ig->table);
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g_free(ig);
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}
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}
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static void
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ignore_list_add(IgnoreList* ig, const char* fs)
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{
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g_hash_table_insert(ig->table, g_strdup(fs), GINT_TO_POINTER(1));
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}
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static gboolean
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ignore_list_has(IgnoreList* ig, const char* fs)
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{
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gpointer data;
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data = g_hash_table_lookup(ig->table, fs);
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return data != NULL;
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}
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/* ~IgnoreList */
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static gboolean
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ignore_fs(const char *fstype, IgnoreList** ig)
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{
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if (!*ig) {
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FILE* fs;
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char line[128];
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*ig = ignore_list_new();
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ignore_list_add(*ig, "none");
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if ((fs = fopen("/proc/filesystems", "r")) != NULL) {
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while (fgets(line, sizeof line, fs)) {
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if (!strncmp(line, "nodev", 5)) {
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char *type;
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type = g_strstrip(line + 5);
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ignore_list_add(*ig, type);
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}
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}
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fclose(fs);
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}
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}
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return ignore_list_has(*ig, fstype);
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}
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glibtop_mountentry *
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glibtop_get_mountlist_s(glibtop *server, glibtop_mountlist *buf, int all_fs)
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{
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const struct mntent *mnt;
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FILE *fp;
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GArray* entries;
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IgnoreList* ig = NULL;
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memset(buf, 0, sizeof(glibtop_mountlist));
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/* wild guess, preallocate 8 entries
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on a desktop, almost everyone has / and a tmpfs for udev
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if all_fs, there are also proc, sys, fuse, binfmt, etc */
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entries = g_array_sized_new(FALSE, FALSE, sizeof(glibtop_mountentry), 8);
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if (!(fp = setmntent(MOUNTED, "r"))) {
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glibtop_warn_io_r(server, "Could not open %s", MOUNTED);
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goto out;
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}
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while ((mnt = getmntent(fp)))
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{
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glibtop_mountentry *me;
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gsize len;
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if (!all_fs && ignore_fs(mnt->mnt_type, &ig))
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continue;
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len = entries->len;
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g_array_set_size(entries, len + 1);
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me = &g_array_index(entries, glibtop_mountentry, len);
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g_strlcpy(me->devname, mnt->mnt_fsname, sizeof me->devname);
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g_strlcpy(me->mountdir, mnt->mnt_dir, sizeof me->mountdir);
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g_strlcpy(me->type, mnt->mnt_type, sizeof me->type);
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}
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endmntent(fp);
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out:
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ignore_list_delete(ig);
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buf->size = sizeof(glibtop_mountentry);
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buf->number = entries->len;
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buf->total = buf->number * buf->size;
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buf->flags = (1 << GLIBTOP_MOUNTLIST_SIZE)
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| (1 << GLIBTOP_MOUNTLIST_NUMBER)
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| (1 << GLIBTOP_MOUNTLIST_TOTAL);
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return (glibtop_mountentry*) g_array_free(entries, FALSE);
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}
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