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/*
*
* oFono - Open Source Telephony
*
* Copyright (C) 2008-2010 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#define _GNU_SOURCE
#include <string.h>
#include <stdarg.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <errno.h>
#include <glib.h>
#include "storage.h"
int create_dirs(const char *filename, const mode_t mode)
{
struct stat st;
char *dir;
const char *prev, *next;
int err;
if (filename[0] != '/')
return -1;
err = stat(filename, &st);
if (!err && S_ISREG(st.st_mode))
return 0;
dir = g_try_malloc(strlen(filename) + 1);
if (dir == NULL)
return -1;
strcpy(dir, "/");
for (prev = filename; (next = strchr(prev + 1, '/')); prev = next) {
/* Skip consecutive '/' characters */
if (next - prev == 1)
continue;
strncat(dir, prev + 1, next - prev);
if (mkdir(dir, mode) == -1 && errno != EEXIST) {
g_free(dir);
return -1;
}
}
g_free(dir);
return 0;
}
ssize_t read_file(unsigned char *buffer, size_t len,
const char *path_fmt, ...)
{
va_list ap;
char *path;
ssize_t r;
int fd;
va_start(ap, path_fmt);
path = g_strdup_vprintf(path_fmt, ap);
va_end(ap);
fd = TFR(open(path, O_RDONLY));
g_free(path);
if (fd == -1)
return -1;
r = TFR(read(fd, buffer, len));
TFR(close(fd));
return r;
}
/*
* Write a buffer to a file in a transactionally safe form
*
* Given a buffer, write it to a file named after
* @path_fmt+args. However, to make sure the file contents are
* consistent (ie: a crash right after opening or during write()
* doesn't leave a file half baked), the contents are written to a
* file with a temporary name and when closed, it is renamed to the
* specified name (@path_fmt+args).
*/
ssize_t write_file(const unsigned char *buffer, size_t len, mode_t mode,
const char *path_fmt, ...)
{
va_list ap;
char *tmp_path, *path;
ssize_t r;
int fd;
va_start(ap, path_fmt);
path = g_strdup_vprintf(path_fmt, ap);
va_end(ap);
tmp_path = g_strdup_printf("%s.XXXXXX.tmp", path);
r = -1;
if (create_dirs(path, mode | S_IXUSR) != 0)
goto error_create_dirs;
fd = TFR(g_mkstemp_full(tmp_path, O_WRONLY | O_CREAT | O_TRUNC, mode));
if (fd == -1)
goto error_mkstemp_full;
r = TFR(write(fd, buffer, len));
TFR(close(fd));
if (r != (ssize_t) len) {
r = -1;
goto error_write;
}
/*
* Now that the file contents are written, rename to the real
* file name; this way we are uniquely sure that the whole
* thing is there.
*/
unlink(path);
/* conserve @r's value from 'write' */
if (link(tmp_path, path) == -1)
r = -1;
error_write:
unlink(tmp_path);
error_mkstemp_full:
error_create_dirs:
g_free(tmp_path);
g_free(path);
return r;
}
GKeyFile *storage_open(const char *imsi, const char *store)
{
GKeyFile *keyfile;
char *path;
if (store == NULL)
return NULL;
if (imsi)
path = g_strdup_printf(STORAGEDIR "/%s/%s", imsi, store);
else
path = g_strdup_printf(STORAGEDIR "/%s", store);
keyfile = g_key_file_new();
if (path) {
g_key_file_load_from_file(keyfile, path, 0, NULL);
g_free(path);
}
return keyfile;
}
void storage_sync(const char *imsi, const char *store, GKeyFile *keyfile)
{
char *path;
char *data;
gsize length = 0;
if (imsi)
path = g_strdup_printf(STORAGEDIR "/%s/%s", imsi, store);
else
path = g_strdup_printf(STORAGEDIR "/%s", store);
if (path == NULL)
return;
if (create_dirs(path, S_IRUSR | S_IWUSR | S_IXUSR) != 0) {
g_free(path);
return;
}
data = g_key_file_to_data(keyfile, &length, NULL);
g_file_set_contents(path, data, length, NULL);
g_free(data);
g_free(path);
}
void storage_close(const char *imsi, const char *store, GKeyFile *keyfile,
gboolean save)
{
if (save == TRUE)
storage_sync(imsi, store, keyfile);
g_key_file_free(keyfile);
}
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