/*
This file is part of LibGTop 2.0.
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 <unistd.h>
#include <glibtop.h>
#include <glibtop/error.h>
#include <glibtop/procargs.h>
#include <glibtop_suid.h>
#include <sys/param.h>
#include <sys/sysctl.h>
#include <limits.h>
static const unsigned long _glibtop_sysdeps_proc_args =
(1L << GLIBTOP_PROC_ARGS_SIZE);
/* Init function. */
void
_glibtop_init_proc_args_p (glibtop *server)
{
server->sysdeps.proc_args = _glibtop_sysdeps_proc_args;
}
/* Provides detailed information about a process. */
char *
glibtop_get_proc_args_p (glibtop *server, glibtop_proc_args *buf,
pid_t pid, unsigned max_len)
{
char argbuf[4096];
char *start, *end, *str;
size_t bufsize = 4096;
int mib [3];
unsigned length;
char *args;
int *ip;
glibtop_init_p (server, (1 << GLIBTOP_SYSDEPS_PROC_ARGS), 0);
memset (buf, 0, sizeof (glibtop_proc_args));
mib [0] = CTL_KERN;
mib [1] = KERN_PROCARGS;
mib [2] = pid;
/* !!! THE FOLLOWING CODE RUNS SUID ROOT - CHANGE WITH CAUTION !!! */
glibtop_suid_enter (server);
if (sysctl (mib, 3, argbuf, &bufsize, NULL, 0) < 0) {
glibtop_suid_leave (server);
return NULL;
}
glibtop_suid_leave (server);
/* !!! END OF SUID ROOT PART !!! */
end = &argbuf[bufsize];
ip = (int *)end - 2;
while (*--ip) {
if (ip == (int *)argbuf) {
return NULL;
}
}
start = (char *)(ip + 1);
while (*--ip) {
if (ip == (int *)argbuf) {
return NULL;
}
}
ip++;
if ((ip[0] & 0xbfff0000) == 0xbfff0000) {
ip += 2;
start = (char*)(ip + (strlen ((char*)ip) + 3) / 4);
while (!*start)
start++;
}
for (str = start + strlen (start); str < end - 1; str++) {
if (*str == '=') {
while (*str != '\0' && str > start)
str--;
break;
}
}
end = str;
if (start[0] == '-' || start[0] == '?' || start[0] <= ' ') {
return NULL;
}
length = end - start;
if (max_len != 0 && length > max_len)
length = max_len;
args = g_malloc(length + 1);
if (args == NULL) {
glibtop_warn_io_r (server, "malloc(procargs)");
return NULL;
}
memcpy (args, start, length);
args [length] = '\0';
buf->size = length;
buf->flags = _glibtop_sysdeps_proc_args;
return args;
}