9c9ad03d60
1998-06-07 Martin Baulig <martin@home-of-linux.org> * sysdeps/linux/glibtop_machine.h: New file. * sysdeps/linux/*.c: Performance optimizations. We now use `open' and `read' instead of `fopen' and `fscanf'.
98 lines
3.2 KiB
C
98 lines
3.2 KiB
C
/* $Id$ */
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/* Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
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This file is part of the Gnome Top Library.
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Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998.
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The Gnome Top Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The Gnome Top Library 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 GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <glibtop.h>
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#include <glibtop/error.h>
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#include <glibtop/prockernel.h>
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static const unsigned long _glibtop_sysdeps_proc_kernel =
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(1 << GLIBTOP_PROC_KERNEL_K_FLAGS) + (1 << GLIBTOP_PROC_KERNEL_MIN_FLT) +
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(1 << GLIBTOP_PROC_KERNEL_MAJ_FLT) + (1 << GLIBTOP_PROC_KERNEL_CMIN_FLT) +
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(1 << GLIBTOP_PROC_KERNEL_CMAJ_FLT) + (1 << GLIBTOP_PROC_KERNEL_KSTK_ESP) +
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(1 << GLIBTOP_PROC_KERNEL_KSTK_EIP) + (1 << GLIBTOP_PROC_KERNEL_WCHAN);
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/* Provides detailed information about a process. */
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void
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glibtop_get_proc_kernel_s (glibtop *server, glibtop_proc_kernel *buf, pid_t pid)
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{
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char buffer [BUFSIZ], input [BUFSIZ], *tmp;
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int fd = 0, nread;
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glibtop_init_r (&server, 0, 0);
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memset (buf, 0, sizeof (glibtop_proc_kernel));
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if (pid == 0) {
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/* Client is only interested in the flags. */
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buf->flags = _glibtop_sysdeps_proc_kernel;
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return;
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}
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if (pid != server->machine.last_pid) {
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server->machine.last_pid = pid;
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server->machine.no_update = 0;
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}
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if (!server->machine.no_update) {
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server->machine.proc_status [0] = 0;
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server->machine.proc_statm [0] = 0;
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server->machine.proc_stat [0] = 0;
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}
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if (server->machine.proc_stat [0]) {
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strcpy (buffer, server->machine.proc_stat);
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} else {
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sprintf (input, "/proc/%d/stat", pid);
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fd = open (input, O_RDONLY);
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if (fd == -1)
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glibtop_error_r (server, "open (%s): %s",
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input, strerror (errno));
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nread = read (fd, buffer, BUFSIZ);
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if (nread == -1)
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glibtop_error_r (server, "read (%s): %s",
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input, strerror (errno));
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buffer [nread] = 0;
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strcpy (server->machine.proc_stat, buffer);
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close (fd);
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}
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/* This is from guile-utils/gtop/proc/readproc.c */
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/* split into "PID (cmd" and "<rest>" */
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tmp = strrchr (buffer, ')');
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*tmp = '\0'; /* replace trailing ')' with NUL */
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/* parse these two strings separately, skipping the leading "(". */
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sscanf(tmp + 2, /* skip space after ')' too */
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"%*c %*d %*d %*d %*d %*d %lu %lu %lu %lu %lu "
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"%*d %*d %*d %*d %*d %*d %*u %*u %*d %*u "
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"%*u %*u %*u %*u %*u %lu %lu %*d %*d %*d %*d %lu",
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&buf->k_flags, &buf->min_flt, &buf->cmin_flt,
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&buf->maj_flt, &buf->cmaj_flt, &buf->kstk_esp,
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&buf->kstk_eip, &buf->wchan);
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buf->flags = _glibtop_sysdeps_proc_kernel;
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}
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