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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) version 3.
*
* This program 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with the program; if not, see <http://www.gnu.org/licenses/>
*
*
* Authors:
* Jeffrey Stedfast <fejj@ximian.com>
*
* Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <glib.h>
#include <glib/gstdio.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <stdio.h>
#include <time.h>
#include "e-util.h"
#include "e-mktemp.h"
#define d(x)
/* define to put temporary files in ~/evolution/cache/tmp */
#define TEMP_HOME (1)
/* how old things need to be to expire */
#define TEMP_EXPIRE (60*60*2)
/* dont scan more often than this */
#define TEMP_SCAN (60)
static gint
expire_dir_rec (const gchar *base, time_t now)
{
GDir *dir;
const gchar *d;
GString *path;
gsize len;
struct stat st;
gint count = 0;
d(printf("expire dir '%s'\n", base));
dir = g_dir_open (base, 0, NULL);
if (dir == NULL)
return 0;
path = g_string_new (base);
len = path->len;
while ((d = g_dir_read_name (dir))) {
g_string_truncate (path, len);
g_string_append_printf(path, "/%s", d);
d(printf("Checking '%s' for expiry\n", path->str));
if (g_stat (path->str, &st) == 0
&& st.st_atime + TEMP_EXPIRE < now) {
if (S_ISDIR (st.st_mode)) {
if (expire_dir_rec (path->str, now) == 0) {
d(printf("Removing dir '%s'\n", path->str));
g_rmdir (path->str);
} else {
count++;
}
} else if (g_unlink (path->str) == -1) {
d(printf("expiry failed: %s\n", g_strerror(errno)));
count++;
} else {
d(printf("expired %s\n", path->str));
}
} else {
count++;
}
}
g_string_free (path, TRUE);
g_dir_close (dir);
d(printf("expire dir '%s' %d remaining files\n", base, count));
return count;
}
static GString *
get_dir (gboolean make)
{
GString *path;
time_t now = time (NULL);
static time_t last = 0;
#ifdef TEMP_HOME
const gchar *user_cache_dir;
gchar *tmpdir;
user_cache_dir = e_get_user_cache_dir ();
tmpdir = g_build_filename (user_cache_dir, "tmp", NULL);
path = g_string_new (tmpdir);
if (make && g_mkdir_with_parents (tmpdir, 0777) == -1) {
g_string_free (path, TRUE);
path = NULL;
}
g_free (tmpdir);
#else
path = g_string_new("/tmp/evolution-");
g_string_append_printf (path, "%d", (gint) getuid ());
if (make) {
gint ret;
/* shoot now, ask questions later */
ret = g_mkdir (path->str, S_IRWXU);
if (ret == -1) {
if (errno == EEXIST) {
struct stat st;
if (g_stat (path->str, &st) == -1) {
/* reset errno */
errno = EEXIST;
g_string_free (path, TRUE);
return NULL;
}
/* make sure this is a directory and belongs to us... */
if (!S_ISDIR (st.st_mode) || st.st_uid != getuid ()) {
/* eek! this is bad... */
g_string_free (path, TRUE);
return NULL;
}
} else {
/* some other error...do not pass go, do not collect $200 */
g_string_free (path, TRUE);
return NULL;
}
}
}
#endif
d(printf("temp dir '%s'\n", path ? path->str : "(null)"));
/* fire off an expiry attempt no more often than TEMP_SCAN seconds */
if (path && (last+TEMP_SCAN) < now) {
last = now;
expire_dir_rec (path->str, now);
}
return path;
}
gchar *
e_mktemp (const gchar *template)
{
GString *path;
gint fd;
path = get_dir (TRUE);
if (!path)
return NULL;
g_string_append_c (path, '/');
if (template)
g_string_append (path, template);
else
g_string_append (path, "unknown-XXXXXX");
fd = g_mkstemp (path->str);
if (fd != -1) {
close (fd);
g_unlink (path->str);
}
return g_string_free (path, fd == -1);
}
gint
e_mkstemp (const gchar *template)
{
GString *path;
gint fd;
path = get_dir (TRUE);
if (!path)
return -1;
g_string_append_c (path, '/');
if (template)
g_string_append (path, template);
else
g_string_append (path, "unknown-XXXXXX");
fd = g_mkstemp (path->str);
g_string_free (path, TRUE);
return fd;
}
gchar *
e_mkdtemp (const gchar *template)
{
GString *path;
gchar *tmpdir;
path = get_dir (TRUE);
if (!path)
return NULL;
g_string_append_c (path, '/');
if (template)
g_string_append (path, template);
else
g_string_append (path, "unknown-XXXXXX");
#ifdef HAVE_MKDTEMP
tmpdir = mkdtemp (path->str);
#else
{
gint fd = g_mkstemp (path->str);
if (fd == -1) {
tmpdir = NULL;
} else {
close (fd);
tmpdir = path->str;
g_unlink (tmpdir);
}
}
if (tmpdir) {
if (g_mkdir (tmpdir, S_IRWXU) == -1)
tmpdir = NULL;
}
#endif
g_string_free (path, tmpdir == NULL);
return tmpdir;
}
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