diff options
Diffstat (limited to 'sysdeps/linux/swap.c')
-rw-r--r-- | sysdeps/linux/swap.c | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/sysdeps/linux/swap.c b/sysdeps/linux/swap.c new file mode 100644 index 00000000..2a7d639b --- /dev/null +++ b/sysdeps/linux/swap.c @@ -0,0 +1,104 @@ +/* $Id$ */ + +/* Copyright (C) 1998-99 Martin Baulig + This file is part of LibGTop 1.0. + + Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998. + + LibGTop 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 of the License, + or (at your option) any later version. + + LibGTop 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 LibGTop; see the file COPYING. If not, write to the + Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. +*/ + +#include <config.h> +#include <glibtop/error.h> +#include <glibtop/swap.h> + +#include <fcntl.h> + +static unsigned long _glibtop_sysdeps_swap = +(1L << GLIBTOP_SWAP_TOTAL) + (1L << GLIBTOP_SWAP_USED) + +(1L << GLIBTOP_SWAP_FREE); + +static unsigned long _glibtop_sysdeps_swap_paging = +(1L << GLIBTOP_SWAP_PAGEIN) + (1L << GLIBTOP_SWAP_PAGEOUT); + +/* Init function. */ + +void +glibtop_init_swap_s (glibtop *server) +{ + server->sysdeps.swap = _glibtop_sysdeps_swap | + _glibtop_sysdeps_swap_paging; +} + +/* Provides information about swap usage. */ + +#define MEMINFO "/proc/meminfo" +#define PROC_STAT "/proc/stat" + +void +glibtop_get_swap_s (glibtop *server, glibtop_swap *buf) +{ + char buffer [BUFSIZ], *p; + int fd, len; + + glibtop_init_s (&server, GLIBTOP_SYSDEPS_SWAP, 0); + + memset (buf, 0, sizeof (glibtop_swap)); + + fd = open (MEMINFO, O_RDONLY); + if (fd < 0) + glibtop_error_io_r (server, "open (%s)", MEMINFO); + + len = read (fd, buffer, BUFSIZ-1); + if (len < 0) + glibtop_error_io_r (server, "read (%s)", MEMINFO); + + close (fd); + + buffer [len] = '\0'; + + p = skip_line (buffer); + p = skip_line (p); + p = skip_token (p); /* "Swap:" */ + + buf->total = strtoul (p, &p, 0); + buf->used = strtoul (p, &p, 0); + buf->free = strtoul (p, &p, 0); + + buf->flags = _glibtop_sysdeps_swap; + + fd = open (PROC_STAT, O_RDONLY); + if (fd < 0) + glibtop_error_io_r (server, "open (%s)", PROC_STAT); + + len = read (fd, buffer, BUFSIZ-1); + if (len < 0) + glibtop_error_io_r (server, "read (%s)", PROC_STAT); + + close (fd); + + buffer [len] = '\0'; + + p = strstr (buffer, "\nswap"); + if (p == NULL) return; + + p = skip_token (p); + + buf->pagein = strtoul (p, &p, 0); + buf->pageout = strtoul (p, &p, 0); + + buf->flags |= _glibtop_sysdeps_swap_paging; +} |