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/* Copyright (C) 1998-99 Martin Baulig
This file is part of LibGTop 1.0.
Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998.
LibGTop is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
LibGTop is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with LibGTop; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include <config.h>
#include <glibtop/proclist.h>
#include <glibtop/procuid.h>
#include <glibtop/procstate.h>
#include <sys/stat.h>
#include <unistd.h>
#include <dirent.h>
#include <ctype.h>
static const unsigned long _glibtop_sysdeps_proclist =
(1L << GLIBTOP_PROCLIST_TOTAL) + (1L << GLIBTOP_PROCLIST_NUMBER) +
(1L << GLIBTOP_PROCLIST_SIZE);
/* Init function. */
void
_glibtop_init_proclist_s (glibtop *server)
{
server->sysdeps.proclist = _glibtop_sysdeps_proclist;
}
/* Fetch list of currently running processes.
*
* The interface of this function is a little bit different from the others:
* buf->flags is only set if the call succeeded, in this case pids_chain,
* a list of the pids of all currently running processes is returned,
* buf->number is the number of elements of this list and buf->size is
* the size of one single element (sizeof (unsigned)). The total size is
* stored in buf->total.
*
* The calling function has to free the memory to which a pointer is returned.
*
* On error, NULL is returned and buf->flags is zero. */
pid_t*
glibtop_get_proclist_s (glibtop *server, glibtop_proclist *buf,
gint64 which, gint64 arg)
{
DIR *proc;
struct dirent *entry;
GArray *pids;
glibtop_proc_uid procuid;
glibtop_proc_state procstate;
struct stat statb;
memset (buf, 0, sizeof (glibtop_proclist));
proc = opendir ("/proc");
if (!proc) return NULL;
if(fstat(dirfd(proc), &statb) != 0) return NULL;
pids = g_array_sized_new(FALSE, FALSE, sizeof(pid_t), statb.st_nlink);
/* read every every entry in /proc */
while((entry = readdir (proc))) {
pid_t pid;
if (entry->d_type != DT_DIR)
continue;
if (!(pid = strtoul(entry->d_name, NULL, 10)))
continue;
switch (which & GLIBTOP_KERN_PROC_MASK) {
case GLIBTOP_KERN_PROC_ALL:
break;
case GLIBTOP_KERN_PROC_PID:
if ((pid_t) arg != pid)
continue;
break;
case GLIBTOP_KERN_PROC_UID:
{
char path[32];
struct stat path_stat;
snprintf(path, sizeof path, "/proc/%u", (unsigned)pid);
if (stat(path, &path_stat))
continue;
if ((uid_t) arg != path_stat.st_uid)
continue;
}
break;
case GLIBTOP_KERN_PROC_PGRP:
/* Do you really, really need this ? */
glibtop_get_proc_uid_s (server, &procuid, pid);
if (procuid.flags & (1L << GLIBTOP_PROC_UID_PGRP))
if ((int) arg != procuid.pgrp)
continue;
break;
case GLIBTOP_KERN_PROC_SESSION:
/* Do you really, really need this ? */
glibtop_get_proc_uid_s (server, &procuid, pid);
if (procuid.flags & (1L << GLIBTOP_PROC_UID_SESSION))
if ((int) arg != procuid.session)
continue;
break;
case GLIBTOP_KERN_PROC_TTY:
/* Do you really, really need this ? */
glibtop_get_proc_uid_s (server, &procuid, pid);
if (procuid.flags & (1L << GLIBTOP_PROC_UID_TTY))
if ((int) arg != procuid.tty)
continue;
break;
case GLIBTOP_KERN_PROC_RUID:
/* Do you really, really need this ? */
glibtop_get_proc_uid_s (server, &procuid, pid);
if (procuid.flags & (1L << GLIBTOP_PROC_UID_EUID))
if ((int) arg != procuid.euid)
continue;
break;
}
if (which & GLIBTOP_EXCLUDE_NOTTY) {
glibtop_get_proc_uid_s (server, &procuid, pid);
if (procuid.flags & (1L << GLIBTOP_PROC_UID_TTY))
if (procuid.tty == -1) continue;
}
if (which & GLIBTOP_EXCLUDE_IDLE) {
glibtop_get_proc_state_s (server, &procstate, pid);
if (procstate.flags & (1L << GLIBTOP_PROC_STATE_STATE))
if (procstate.state != GLIBTOP_PROCESS_RUNNING) continue;
}
if (which & GLIBTOP_EXCLUDE_SYSTEM) {
glibtop_get_proc_uid_s (server, &procuid, pid);
if (procuid.flags & (1L << GLIBTOP_PROC_UID_UID))
if (procuid.uid == 0) continue;
}
g_array_append_val(pids, pid);
}
closedir (proc);
buf->flags = _glibtop_sysdeps_proclist;
buf->size = sizeof(pid_t);
buf->number = pids->len;
buf->total = buf->number * buf->size;
return (pid_t*)g_array_free(pids, FALSE);
}
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