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/* $Id$ */
/* 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., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#include <glibtop.h>
#include <glibtop/error.h>
#include <glibtop/xmalloc.h>
#include <glibtop/procargs.h>
static const unsigned long _glibtop_sysdeps_proc_args =
(1 << GLIBTOP_PROC_ARGS_SIZE);
/* Init function. */
void
glibtop_init_proc_args_s (glibtop *server)
{
server->sysdeps.proc_args = _glibtop_sysdeps_proc_args;
}
/* Provides detailed information about a process. */
char *
glibtop_get_proc_args_s (glibtop *server, glibtop_proc_args *buf,
pid_t pid, unsigned max_len)
{
char fn [BUFSIZ], buffer [BUFSIZ];
int cmdline, len, total = 0;
char *retval = NULL;
glibtop_init_s (&server, GLIBTOP_SYSDEPS_PROC_ARGS, 0);
memset (buf, 0, sizeof (glibtop_proc_args));
sprintf (fn, "/proc/%d/cmdline", pid);
cmdline = open (fn, O_RDONLY);
if (cmdline < 0) return NULL;
if (max_len) {
retval = glibtop_malloc_r (server, max_len+1);
len = read (cmdline, retval, max_len);
if (len < 0) {
glibtop_free_r (server, retval);
return NULL;
}
return retval;
}
while (1) {
len = read (cmdline, buffer, BUFSIZ-1);
if (len < 0) {
glibtop_free_r (server, retval);
return NULL;
}
if (len == 0)
break;
retval = glibtop_realloc_r (server, retval, total+len+1);
memcpy (retval+total, buffer, len);
*(retval+total+len) = 0;
total += len;
}
close (cmdline);
buf->size = total;
buf->flags = _glibtop_sysdeps_proc_args;
return retval;
}
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