aboutsummaryrefslogtreecommitdiffstats
path: root/e-util/e-mktemp.c
blob: 682563907c90483a1f96b3d36f4953e78bee2835 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
/*
 * 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 <libedataserver/e-data-server-util.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 int
expire_dir_rec(const char *base, time_t now)
{
    GDir *dir;
    const char *d;
    GString *path;
    size_t len;
    struct stat st;
    int 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
    char *tmpdir = NULL;
    tmpdir = g_build_filename(e_get_user_data_dir (),
        "cache", "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", (int) getuid ());
    if (make) {
        int 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;
}

char *
e_mktemp (const char *template)
{
    GString *path;
    char *ret;

    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");

    ret = mktemp (path->str);
    g_string_free(path, ret == NULL);

    return ret;
}


int
e_mkstemp (const char *template)
{
    GString *path;
    int 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;
}


char *
e_mkdtemp (const char *template)
{
    GString *path;
    char *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
    tmpdir = mktemp (path->str);
    if (tmpdir) {
        if (g_mkdir (tmpdir, S_IRWXU) == -1)
            tmpdir = NULL;
    }
#endif
    g_string_free(path, tmpdir == NULL);

    return tmpdir;
}