136 lines
3.2 KiB
C
136 lines
3.2 KiB
C
/*
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* CDE - Common Desktop Environment
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*
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* Copyright (c) 1993-2012, The Open Group. All rights reserved.
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*
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* These libraries and programs are free software; you can
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* redistribute them and/or modify them under the terms of the GNU
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* Lesser General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* These libraries and programs are distributed in the hope that
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* they will be useful, but WITHOUT ANY WARRANTY; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU Lesser General Public License for more
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* details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with these libraries and programs; if not, write
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* to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
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* Floor, Boston, MA 02110-1301 USA
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*/
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/* $XConsortium: Process.C /main/3 1996/10/01 16:10:01 drk $ */
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/* *
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* (c) Copyright 1993, 1994 Hewlett-Packard Company *
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* (c) Copyright 1993, 1994 International Business Machines Corp. *
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* (c) Copyright 1993, 1994 Sun Microsystems, Inc. *
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* (c) Copyright 1993, 1994 Novell, Inc. *
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*/
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#include "Process.h"
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#include "Invoke.h"
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#include <string.h>
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#include <stdlib.h>
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Process::Process()
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{
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#ifdef aix
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(void)Invoke("ps -e -F \"pid ppid uid command\"", &procs);
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#elif defined(__FreeBSD__)
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(void)Invoke("/bin/ps ax -o pid,ppid,uid,comm", &procs);
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#else
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(void)Invoke("/bin/ps -el | awk '{printf(\"%s %s %s %s\\n\",$4,$5,$3,$NF)}'",
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&procs);
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#endif
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pprocs = (char **)malloc(sizeof(char *));
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NumProcs = 0;
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strtok(procs, "\n");
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while(pprocs[NumProcs] = strtok(NULL, "\n"))
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{
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NumProcs++;
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pprocs = (char **)realloc(pprocs, sizeof(char *) * (NumProcs + 1));
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}
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last_pid = -1;
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}
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Process::~Process()
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{
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free(procs);
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free(pprocs);
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}
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char *Process::GetByPid(pid_t _pid)
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{
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int i;
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if (last_pid == _pid)
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return last_proc;
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if (_pid)
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for (i = 0; i < NumProcs; i++)
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{
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long long_pid, long_ppid, long_uid;
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sscanf(pprocs[i], "%ld %ld %ld", &long_pid, &long_ppid, &long_uid);
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pid = (pid_t)long_pid;
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ppid = (pid_t)long_ppid;
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uid = (uid_t)long_uid;
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if (_pid == pid)
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{
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last_pid = _pid;
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last_proc = pprocs[i];
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return pprocs[i];
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}
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}
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return NULL;
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}
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pid_t Process::Parent(pid_t pid)
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{
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char *proc = GetByPid(pid);
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if (proc)
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return ppid;
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else
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return (pid_t)-1;
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}
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uid_t Process::UID(pid_t pid)
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{
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char *proc = GetByPid(pid);
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if (proc)
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return uid;
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else
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return (uid_t)-1;
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}
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char *Process::Command(pid_t _pid)
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{
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char *proc = GetByPid(_pid);
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if (proc)
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{
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char *s;
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// Find first field
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for (s = proc; *s == ' '; s++)
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;
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for ( ; *s != ' '; s++)
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;
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// Find second field
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for ( ; *s == ' '; s++)
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;
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for ( ; *s != ' '; s++)
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;
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// Find third field
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for ( ; *s == ' '; s++)
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;
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for ( ; *s != ' '; s++)
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;
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// Find fourth field
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for ( ; *s == ' '; s++)
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;
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return s;
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}
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else
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return NULL;
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}
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