1b90ed4fcc
1998-06-18 Martin Baulig <baulig@taurus.uni-trier.de> * sysdeps/linux/*.c: Reverted some stuff from 06-07-1998 since it was too buggy.
91 lines
2.8 KiB
C
91 lines
2.8 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/procstate.h>
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#include <sys/stat.h>
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static const unsigned long _glibtop_sysdeps_proc_state =
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(1 << GLIBTOP_PROC_STATE_CMD) + (1 << GLIBTOP_PROC_STATE_STATE) +
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(1 << GLIBTOP_PROC_STATE_UID) + (1 << GLIBTOP_PROC_STATE_GID);
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/* Provides detailed information about a process. */
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void
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glibtop_get_proc_state_s (glibtop *server, glibtop_proc_state *buf, pid_t pid)
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{
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char buffer [BUFSIZ], input [BUFSIZ], *tmp;
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struct stat statb;
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int fd, nread;
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glibtop_init_r (&server, 0, 0);
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memset (buf, 0, sizeof (glibtop_proc_state));
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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_state;
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return;
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}
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sprintf (input, "/proc/%d/stat", pid);
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/* IMPORTANT NOTICE: For security reasons it is extremely important
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* that the 'uid' and 'gid' fields have correct
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* values; NEVER set their flags values if this
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* is not the case !!! */
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if (stat (input, &statb)) return;
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/* For security reasons we use stat () that is more failsafe than sscanf (). */
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buf->uid = statb.st_uid;
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buf->gid = statb.st_gid;
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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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/* 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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memset (buf->cmd, 0, sizeof (buf->cmd));
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sscanf (buffer, "%d (%39c", &pid, buf->cmd);
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sscanf(tmp + 2, "%c", &buf->state); /* skip space after ')' too */
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close (fd);
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buf->flags = _glibtop_sysdeps_proc_state;
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}
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