a5dd7e9063
It changes the return values of all sysdeps functions which were previosly returning void to int. This is the first step to implement better error handling in LibGTop. Martin 1999-10-24 Martin Baulig <martin@home-of-linux.org> * include/glibtop/*.h (glibtop_get_*, glibtop_init*): Changed the return value of all `glibtop_get_<feature>_* ()' and all `glibtop_init_<feature>_* ()' functions from void to int. * features.def: Reflect changes of the return values. * sysdeps/*/*.c: Reflect changes of the return values.
104 lines
3.4 KiB
C
104 lines
3.4 KiB
C
/* $Id$ */
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/* Copyright (C) 1998 Joshua Sled
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This file is part of LibGTop 1.0.
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Contributed by Joshua Sled <jsled@xcf.berkeley.edu>, July 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/error.h>
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#include <glibtop/xmalloc.h>
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#include <glibtop/proclist.h>
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#include <glibtop_suid.h>
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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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/* Fetch list of currently running processes.
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* The interface of this function is a little bit different from the others:
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* buf->flags is only set if the call succeeded, in this case pids_chain,
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* a list of the pids of all currently running processes is returned,
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* buf->number is the number of elements of this list and buf->size is
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* the size of one single element (sizeof (unsigned)). The total size is
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* stored in buf->total.
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*
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* The calling function has to free the memory to which a pointer is returned.
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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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* The calling function has to free the memory to which a pointer is returned.
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*
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* On error, NULL is returned and buf->flags is zero. */
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/* Init function. */
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int
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glibtop_init_proclist_p (glibtop *server)
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{
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server->sysdeps.proclist = _glibtop_sysdeps_proclist;
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}
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unsigned *
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glibtop_get_proclist_p (glibtop *server, glibtop_proclist *buf,
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int64_t real_which, int64_t arg)
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{
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struct kinfo_proc *pinfo;
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unsigned *pids = NULL;
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int which, count;
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int i,j;
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glibtop_init_p (server, (1L << GLIBTOP_SYSDEPS_PROCLIST), 0);
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memset (buf, 0, sizeof (glibtop_proclist));
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which = (int)(real_which & GLIBTOP_KERN_PROC_MASK);
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/* Get the process data */
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pinfo = kvm_getprocs (server->machine.kd, which, arg, &count);
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if ((pinfo == NULL) || (count < 1)) {
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glibtop_warn_io_r (server, "kvm_getprocs (proclist)");
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return NULL;
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}
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count--;
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/* Allocate count objects in the pids_chain array
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* Same as malloc is pids is NULL, which it is. */
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pids = glibtop_realloc_r (server, pids, count * sizeof (unsigned));
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/* Copy the pids over to this chain */
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for (i=j=0; i < count; i++) {
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if ((real_which & GLIBTOP_EXCLUDE_IDLE) &&
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(pinfo[i].kp_proc.p_stat != SRUN))
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continue;
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else if ((real_which & GLIBTOP_EXCLUDE_SYSTEM) &&
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(pinfo[i].kp_eproc.e_pcred.p_ruid == 0))
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continue;
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pids [j++] = (unsigned) pinfo[i].kp_proc.p_pid;
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} /* end for */
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/* Set the fields in buf */
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buf->number = j;
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buf->size = sizeof (unsigned);
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buf->total = j * sizeof (unsigned);
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buf->flags = _glibtop_sysdeps_proclist;
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return pids;
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}
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