4b3fcf149a
1998-08-07 Martin Baulig <martin@home-of-linux.org> * glibtop.h (_glibtop): New fields `error_method', `sysdeps' and `required'. I added an improved error handling: the client can tell the libraries which fields are absolutely required for each features and if it fails to set one of them, this will create an error which is handled depending upon the `error_method'. * include/glibtop/open.h: Define some constants for `error_method'. * lib/sysdeps.c (glibtop_get_sysdeps_r): No longer actually call any sysdeps function, it now simply copies `server->sysdeps'. (_glibtop_init_hook_s): Added. List of functions to be called during `glibtop_init_s' set to `glibtop_init_<no-suid-feature>_s'. * include/glibtop/sysdeps.h (<glibtop/union.h>): Removed. (glibtop_init_func_t): New typedef. (_glibtop_init_hook_s): Added. * sysdeps/linux/*.c (glibtop_init_<feature>_s): New functions. (glibtop_get_proc_*): Zero is now a valid pid. * sysdeps/kernel/*.c (glibtop_init_<feature>_s): New functions. (glibtop_get_proc_*): Zero is now a valid pid. 1998-08-06 Martin Baulig <martin@home-of-linux.org>
94 lines
2.7 KiB
C
94 lines
2.7 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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/* Init function. */
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void
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glibtop_init_proc_state_s (glibtop *server)
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{
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server->sysdeps.proc_state = _glibtop_sysdeps_proc_state;
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}
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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 input [BUFSIZ], *tmp;
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struct stat statb;
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int nread;
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FILE *f;
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glibtop_init_s (&server, GLIBTOP_SYSDEPS_PROC_STATE, 0);
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memset (buf, 0, sizeof (glibtop_proc_state));
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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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f = fopen (input, "r");
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if (!f) return;
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nread = fread (input, 1, BUFSIZ, f);
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if (nread < 0) {
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fclose (f);
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return;
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}
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fclose (f);
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input [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 (input, ')');
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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 (input, "%d (%39c", &pid, buf->cmd);
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sscanf(tmp + 2, "%c", &buf->state); /* skip space after ')' too */
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buf->flags = _glibtop_sysdeps_proc_state;
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}
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