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/* Tracker - indexer and metadata database engine
* Copyright (C) 2007, Mr Jamie McCracken (jamiemcc@gnome.org)
*
* This library 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.
*
* This library 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 this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include <errno.h>
#include <unistd.h>
#include <sys/resource.h>
#include <glib.h>
#include <glib/gspawn.h>
#include <glib/gstring.h>
#include "tracker-os-dependant.h"
#define MAX_MEM 128
#define MAX_MEM_AMD64 512
gboolean
tracker_check_uri (const gchar *uri)
{
return uri && uri[0] == G_DIR_SEPARATOR;
}
gboolean
tracker_spawn (gchar **argv, gint timeout, gchar **tmp_stdout, gint *exit_status)
{
GSpawnFlags flags;
if (!tmp_stdout) {
flags = G_SPAWN_SEARCH_PATH | G_SPAWN_STDOUT_TO_DEV_NULL | G_SPAWN_STDERR_TO_DEV_NULL;
} else {
flags = G_SPAWN_SEARCH_PATH | G_SPAWN_STDERR_TO_DEV_NULL;
}
return g_spawn_sync (NULL,
argv,
NULL,
flags,
tracker_child_cb,
GINT_TO_POINTER (timeout),
tmp_stdout,
NULL,
exit_status,
NULL);
}
gchar *
tracker_create_permission_string (struct stat finfo)
{
gchar *str;
gint n, bit;
/* create permissions string */
str = g_strdup ("?rwxrwxrwx");
switch (finfo.st_mode & S_IFMT) {
case S_IFSOCK: str[0] = 's'; break;
case S_IFIFO: str[0] = 'p'; break;
case S_IFLNK: str[0] = 'l'; break;
case S_IFCHR: str[0] = 'c'; break;
case S_IFBLK: str[0] = 'b'; break;
case S_IFDIR: str[0] = 'd'; break;
case S_IFREG: str[0] = '-'; break;
}
for (bit = 0400, n = 1; bit; bit >>= 1, ++n) {
if (!(finfo.st_mode & bit)) {
str[n] = '-';
}
}
if (finfo.st_mode & S_ISUID) {
str[3] = (finfo.st_mode & S_IXUSR) ? 's' : 'S';
}
if (finfo.st_mode & S_ISGID) {
str[6] = (finfo.st_mode & S_IXGRP) ? 's' : 'S';
}
if (finfo.st_mode & S_ISVTX) {
str[9] = (finfo.st_mode & S_IXOTH) ? 't' : 'T';
}
return str;
}
static gboolean
set_memory_rlimits (void)
{
struct rlimit rl;
gboolean fail = FALSE;
/* We want to limit the max virtual memory
* most extractors use mmap() so only virtual memory can be effectively limited */
#ifdef __x86_64__
/* many extractors on AMD64 require 512M of virtual memory, so we limit heap too */
getrlimit (RLIMIT_AS, &rl);
rl.rlim_cur = MAX_MEM_AMD64 * 1024 * 1024;
fail |= setrlimit (RLIMIT_AS, &rl);
getrlimit (RLIMIT_DATA, &rl);
rl.rlim_cur = MAX_MEM * 1024 * 1024;
fail |= setrlimit (RLIMIT_DATA, &rl);
#else
/* on other architectures, 128M of virtual memory seems to be enough */
getrlimit (RLIMIT_AS, &rl);
rl.rlim_cur = MAX_MEM * 1024 * 1024;
fail |= setrlimit (RLIMIT_AS, &rl);
#endif
if (fail) {
g_printerr ("Error trying to set memory limit\n");
}
return !fail;
}
void
tracker_child_cb (gpointer user_data)
{
struct rlimit cpu_limit;
gint timeout = GPOINTER_TO_INT (user_data);
/* set cpu limit */
getrlimit (RLIMIT_CPU, &cpu_limit);
cpu_limit.rlim_cur = timeout;
cpu_limit.rlim_max = timeout+1;
if (setrlimit (RLIMIT_CPU, &cpu_limit) != 0) {
g_printerr ("ERROR: trying to set resource limit for cpu\n");
}
set_memory_rlimits ();
/* Set child's niceness to 19 */
errno = 0;
/* nice() uses attribute "warn_unused_result" and so complains if we do not check its
returned value. But it seems that since glibc 2.2.4, nice() can return -1 on a
successful call so we have to check value of errno too. Stupid... */
if (nice (19) == -1 && errno) {
g_printerr ("ERROR: trying to set nice value\n");
}
/* have this as a precaution in cases where cpu limit has not been reached due to spawned app sleeping */
alarm (timeout+2);
}
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