92 lines
2.2 KiB
C
92 lines
2.2 KiB
C
/* $Id$ */
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/* Copyright (C) 1998-99 Martin Baulig
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This file is part of LibGTop 1.0.
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Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998.
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LibGTop is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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LibGTop is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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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 LibGTop; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA.
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*/
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#include <config.h>
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#include <glibtop/error.h>
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#include <glibtop/mem.h>
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static const unsigned long _glibtop_sysdeps_mem =
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(1L << GLIBTOP_MEM_TOTAL) + (1L << GLIBTOP_MEM_USED) +
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(1L << GLIBTOP_MEM_FREE) + (1L << GLIBTOP_MEM_SHARED) +
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(1L << GLIBTOP_MEM_BUFFER) + (1L << GLIBTOP_MEM_CACHED) +
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(1L << GLIBTOP_MEM_USER);
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/* Init function. */
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int
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glibtop_init_mem_s (glibtop *server)
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{
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server->sysdeps.mem = _glibtop_sysdeps_mem;
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return 0;
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}
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/* Provides information about memory usage. */
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#define FILENAME "/proc/meminfo"
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int
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glibtop_get_mem_s (glibtop *server, glibtop_mem *buf)
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{
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char buffer [BUFSIZ], *p;
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int fd, len;
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glibtop_init_s (&server, GLIBTOP_SYSDEPS_MEM, 0);
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memset (buf, 0, sizeof (glibtop_mem));
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fd = open (FILENAME, O_RDONLY);
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if (fd < 0) {
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glibtop_warn_io_r (server, "open (%s)", FILENAME);
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return -1;
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}
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len = read (fd, buffer, BUFSIZ-1);
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if (len < 0) {
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close (fd);
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glibtop_warn_io_r (server, "read (%s)", FILENAME);
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return -1;
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}
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close (fd);
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buffer [len] = '\0';
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p = skip_line (buffer);
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p = skip_token (p); /* "Mem:" */
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buf->total = strtoul (p, &p, 0);
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buf->used = strtoul (p, &p, 0);
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buf->free = strtoul (p, &p, 0);
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buf->shared = strtoul (p, &p, 0);
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buf->buffer = strtoul (p, &p, 0);
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buf->cached = strtoul (p, &p, 0);
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buf->user = buf->total - buf->free - buf->shared - buf->buffer;
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buf->flags = _glibtop_sysdeps_mem;
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return 0;
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}
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