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- /* $Id: sm_df.c,v 1.4 2007/02/11 20:07:32 dijkstra Exp $ */
- /*
- * Copyright (c) 2005 Marc Balmer
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * - Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * - Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following
- * disclaimer in the documentation and/or other materials provided
- * with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- */
- /*
- * Get current df statistics and return them in symon_buf as
- *
- * blocks : bfree : bavail : files : ffree : \
- * syncwrites : asyncwrites
- */
- #include "conf.h"
- #include <sys/types.h>
- #include <sys/param.h>
- #include <sys/mount.h>
- #include <ufs/ufs/dinode.h>
- #include <ufs/ffs/fs.h>
- #include <errno.h>
- #include <fcntl.h>
- #include <fstab.h>
- #include <stdlib.h>
- #include <string.h>
- #include <unistd.h>
- #include "error.h"
- #include "symon.h"
- /* Globals for this module start with df_ */
- static struct statfs *df_stats = NULL;
- static int df_parts = 0;
- void
- init_df(struct stream *st)
- {
- strlcpy(st->parg.df.rawdev, "/dev/", sizeof(st->parg.df.rawdev));
- strlcat(st->parg.df.rawdev, st->arg, sizeof(st->parg.df.rawdev));
- info("started module df(%.200s)", st->arg);
- }
- void
- gets_df()
- {
- if ((df_parts = getmntinfo(&df_stats, MNT_NOWAIT)) == 0) {
- warning("df failed");
- }
- }
- /*
- * from src/bin/df.c:
- * Convert statfs returned filesystem size into BLOCKSIZE units.
- * Attempts to avoid overflow for large filesystems.
- */
- #define fsbtoblk(num, fsbs, bs) \
- (((fsbs) != 0 && (fsbs) < (bs)) ? \
- (num) / ((bs) / (fsbs)) : (num) * ((fsbs) / (bs)))
- int
- get_df(char *symon_buf, int maxlen, struct stream *st)
- {
- int n;
- for (n = 0; n < df_parts; n++) {
- if (!strncmp(df_stats[n].f_mntfromname, st->parg.df.rawdev, SYMON_DFNAMESIZE)) {
- return snpack(symon_buf, maxlen, st->arg, MT_DF,
- (u_int64_t)fsbtoblk(df_stats[n].f_blocks, df_stats[n].f_bsize, SYMON_DFBLOCKSIZE),
- (u_int64_t)fsbtoblk(df_stats[n].f_bfree, df_stats[n].f_bsize, SYMON_DFBLOCKSIZE),
- (u_int64_t)fsbtoblk(df_stats[n].f_bavail, df_stats[n].f_bsize, SYMON_DFBLOCKSIZE),
- (u_int64_t)df_stats[n].f_files,
- (u_int64_t)df_stats[n].f_ffree,
- (u_int64_t)df_stats[n].f_syncwrites,
- (u_int64_t)df_stats[n].f_asyncwrites);
- }
- }
- warning("df(%.200s) failed (no such device)", st->arg);
- return 0;
- }
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