a5dd7e9063
It changes the return values of all sysdeps functions which were previosly returning void to int. This is the first step to implement better error handling in LibGTop. Martin 1999-10-24 Martin Baulig <martin@home-of-linux.org> * include/glibtop/*.h (glibtop_get_*, glibtop_init*): Changed the return value of all `glibtop_get_<feature>_* ()' and all `glibtop_init_<feature>_* ()' functions from void to int. * features.def: Reflect changes of the return values. * sysdeps/*/*.c: Reflect changes of the return values.
105 lines
2.5 KiB
C
105 lines
2.5 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/swap.h>
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#include <fcntl.h>
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static unsigned long _glibtop_sysdeps_swap =
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(1L << GLIBTOP_SWAP_TOTAL) + (1L << GLIBTOP_SWAP_USED) +
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(1L << GLIBTOP_SWAP_FREE);
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static unsigned long _glibtop_sysdeps_swap_paging =
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(1L << GLIBTOP_SWAP_PAGEIN) + (1L << GLIBTOP_SWAP_PAGEOUT);
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/* Init function. */
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int
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glibtop_init_swap_s (glibtop *server)
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{
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server->sysdeps.swap = _glibtop_sysdeps_swap |
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_glibtop_sysdeps_swap_paging;
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}
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/* Provides information about swap usage. */
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#define MEMINFO "/proc/meminfo"
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#define PROC_STAT "/proc/stat"
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int
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glibtop_get_swap_s (glibtop *server, glibtop_swap *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_SWAP, 0);
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memset (buf, 0, sizeof (glibtop_swap));
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fd = open (MEMINFO, O_RDONLY);
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if (fd < 0)
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glibtop_error_io_r (server, "open (%s)", MEMINFO);
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len = read (fd, buffer, BUFSIZ-1);
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if (len < 0)
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glibtop_error_io_r (server, "read (%s)", MEMINFO);
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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_line (p);
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p = skip_token (p); /* "Swap:" */
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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->flags = _glibtop_sysdeps_swap;
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fd = open (PROC_STAT, O_RDONLY);
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if (fd < 0)
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glibtop_error_io_r (server, "open (%s)", PROC_STAT);
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len = read (fd, buffer, BUFSIZ-1);
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if (len < 0)
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glibtop_error_io_r (server, "read (%s)", PROC_STAT);
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close (fd);
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buffer [len] = '\0';
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p = strstr (buffer, "\nswap");
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if (p == NULL) return;
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p = skip_token (p);
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buf->pagein = strtoul (p, &p, 0);
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buf->pageout = strtoul (p, &p, 0);
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buf->flags |= _glibtop_sysdeps_swap_paging;
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}
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