4c8ae9e25c
2003-10-19 Carlos Perelló Marín <carlos@gnome.org> * support/*: Reverted libgtop changes. It's a common module and I should not modify it. * Added/removed files. Now the move should be done.
252 lines
6.6 KiB
C
252 lines
6.6 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 <glibtop.h>
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#include <glibtop/proclist.h>
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#include <glibtop/xmalloc.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <dirent.h>
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#include <ctype.h>
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#define GLIBTOP_PROCLIST_FLAGS 3
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static const unsigned long _glibtop_sysdeps_proclist =
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(1L << GLIBTOP_PROCLIST_TOTAL) + (1L << GLIBTOP_PROCLIST_NUMBER) +
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(1L << GLIBTOP_PROCLIST_SIZE);
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/* Init function. */
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void
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glibtop_init_proclist_s (glibtop *server)
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{
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server->sysdeps.proclist = _glibtop_sysdeps_proclist;
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}
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#define BLOCK_COUNT 256
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#define BLOCK_SIZE (BLOCK_COUNT * sizeof (unsigned))
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/* Fetch list of currently running processes.
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*
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* IMPORTANT NOTE:
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* On error, this function MUST return NULL and set buf->flags to zero !
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* On success, it returnes a pointer to a list of buf->number elements
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* each buf->size big. The total size is stored in buf->total. */
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unsigned *
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glibtop_get_proclist_s (glibtop *server, glibtop_proclist *buf,
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int64_t which, int64_t arg)
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{
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DIR *proc;
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struct dirent *entry;
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char buffer [BUFSIZ];
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unsigned count, total, pid, mask;
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unsigned pids [BLOCK_COUNT], *pids_chain = NULL;
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unsigned pids_size = 0, pids_offset = 0, new_size;
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struct stat statb;
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int len, i, ok;
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memset (buf, 0, sizeof (glibtop_proclist));
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mask = which & ~GLIBTOP_KERN_PROC_MASK;
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which &= GLIBTOP_KERN_PROC_MASK;
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/* Check if the user wanted only one process */
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if(which == GLIBTOP_KERN_PROC_PID)
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{
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if(mask)
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{
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#ifdef HAVE_PROCFS_H
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struct psinfo psinfo;
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#else
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struct prpsinfo psinfo;
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#endif
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if(glibtop_get_proc_data_psinfo_s(server, &psinfo, pid))
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return NULL;
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if(mask & GLIBTOP_EXCLUDE_IDLE && !psinfo.pr_pctcpu)
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return NULL;
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if(mask & GLIBTOP_EXCLUDE_SYSTEM && psinfo.pr_flag & SSYS)
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return NULL;
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if(mask & GLIBTOP_EXCLUDE_NOTTY && psinfo.pr_ttydev == PRNODEV)
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return NULL;
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}
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else
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{
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sprintf(buffer, "/proc/%d", arg);
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if(s_stat(buffer, &statb) < 0)
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return NULL;
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}
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if(!(pids_chain = glibtop_malloc(sizeof(unsigned))))
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return NULL;
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*pids_chain = pid;
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return pids_chain;
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}
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proc = opendir ("/proc");
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if (!proc) return NULL;
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/* read every every entry in /proc */
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for (count = total = 0, entry = readdir (proc);
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entry; entry = readdir (proc)) {
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ok = 1; len = strlen (entry->d_name);
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/* does it consist entirely of digits? */
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#if 0
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/* It does, except for "." and "..". Let's speed up */
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for (i = 0; i < len; i++)
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if (!isdigit (entry->d_name [i])) ok = 0;
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if (!ok) continue;
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#else
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if(entry->d_name[0] == '.')
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continue;
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#endif
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/* convert it in a number */
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#if 0
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if (sscanf (entry->d_name, "%u", &pid) != 1) continue;
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#else
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pid = (unsigned)atol(entry->d_name);
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#endif
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#ifdef HAVE_PROCFS_H
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/* Can we skip it based on the request? We have
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RUID and RGID in struct stat. But we can't do it
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like this for LP64 process, because stat() will fail.
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XXX Unimplemented for now */
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if(!mask && which == GLIBTOP_KERN_PROC_RUID)
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{
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sprintf (buffer, "/proc/%d", pid);
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if (s_stat (buffer, &statb)) continue;
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if (!S_ISDIR (statb.st_mode)) continue;
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if(statb.st_uid != arg) continue;
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}
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if(mask || which != GLIBTOP_KERN_PROC_ALL)
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{
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struct psinfo psinfo;
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if(glibtop_get_proc_data_psinfo_s(server, &psinfo, pid))
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continue;
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if(mask)
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{
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if(mask & GLIBTOP_EXCLUDE_IDLE && !psinfo.pr_pctcpu)
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continue;
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if(mask & GLIBTOP_EXCLUDE_SYSTEM && psinfo.pr_flag & SSYS)
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continue;
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if(mask & GLIBTOP_EXCLUDE_NOTTY
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&& psinfo.pr_ttydev == PRNODEV)
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continue;
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}
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switch(which)
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{
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case GLIBTOP_KERN_PROC_PGRP: if(psinfo.pr_pgid != arg)
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continue;
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break;
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case GLIBTOP_KERN_PROC_SESSION: if(psinfo.pr_sid != arg)
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continue;
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break;
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case GLIBTOP_KERN_PROC_TTY: if(psinfo.pr_ttydev != arg)
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continue;
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break;
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case GLIBTOP_KERN_PROC_UID: if(psinfo.pr_euid != arg)
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continue;
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break;
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case GLIBTOP_KERN_PROC_RUID: if(psinfo.pr_uid != arg)
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continue;
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break;
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default: break;
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}
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}
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#endif
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/* Fine. Now we first try to store it in pids. If this buffer is
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* full, we copy it to the pids_chain. */
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if (count >= BLOCK_COUNT) {
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/* The following call to glibtop_realloc will be
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* equivalent to glibtop_malloc () if `pids_chain' is
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* NULL. We just calculate the new size and copy `pids'
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* to the beginning of the newly allocated block. */
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new_size = pids_size + BLOCK_SIZE;
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pids_chain = glibtop_realloc_r
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(server, pids_chain, new_size);
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memcpy (pids_chain + pids_offset, pids, BLOCK_SIZE);
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pids_size = new_size;
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pids_offset += BLOCK_COUNT;
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count = 0;
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}
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/* pids is now big enough to hold at least one single pid. */
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pids [count++] = pid;
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total++;
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}
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s_closedir (proc);
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/* count is only zero if an error occured (one a running Linux system,
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* we have at least one single process). */
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if (!count) return NULL;
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/* The following call to glibtop_realloc will be equivalent to
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* glibtop_malloc if pids_chain is NULL. We just calculate the
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* new size and copy pids to the beginning of the newly allocated
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* block. */
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new_size = pids_size + count * sizeof (unsigned);
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pids_chain = glibtop_realloc_r (server, pids_chain, new_size);
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memcpy (pids_chain + pids_offset, pids, count * sizeof (unsigned));
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pids_size = new_size;
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pids_offset += BLOCK_COUNT;
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/* Since everything is ok now, we can set buf->flags, fill in the
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* remaining fields and return the `pids_chain'. */
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buf->flags = _glibtop_sysdeps_proclist;
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buf->size = sizeof (unsigned);
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buf->number = total;
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buf->total = total * sizeof (unsigned);
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return pids_chain;
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}
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