int ensure_config_file_exists(const char *config_file)
{
char buf[2048];
int srcfd, destfd;
struct stat sb;
int nread;
int ret;
ret = access(config_file, R_OK|W_OK);
if ((ret == 0) || (errno == EACCES)) {
if ((ret != 0) &&
(chmod(config_file, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP) != 0)) {
ALOGE("Cannot set RW to \"%s\": %s", config_file, strerror(errno));
return -1;
}
/* return if filesize is at least 10 bytes */
if (stat(config_file, &sb) == 0 && sb.st_size > 10) {
return update_ctrl_interface(config_file);
}
} else if (errno != ENOENT) {
ALOGE("Cannot access \"%s\": %s", config_file, strerror(errno));
return -1;
}
srcfd = TEMP_FAILURE_RETRY(open(SUPP_CONFIG_TEMPLATE, O_RDONLY));
if (srcfd < 0) {
ALOGE("Cannot open \"%s\": %s", SUPP_CONFIG_TEMPLATE, strerror(errno));
return -1;
}
destfd = TEMP_FAILURE_RETRY(open(config_file, O_CREAT|O_RDWR, 0660));
if (destfd < 0) {
close(srcfd);
ALOGE("Cannot create \"%s\": %s", config_file, strerror(errno));
return -1;
}
while ((nread = TEMP_FAILURE_RETRY(read(srcfd, buf, sizeof(buf)))) != 0) {
if (nread < 0) {
ALOGE("Error reading \"%s\": %s", SUPP_CONFIG_TEMPLATE, strerror(errno));
close(srcfd);
close(destfd);
unlink(config_file);
return -1;
}
TEMP_FAILURE_RETRY(write(destfd, buf, nread));
}
close(destfd);
close(srcfd);
/* chmod is needed because open() didn't set permisions properly */
if (chmod(config_file, 0660) < 0) {
ALOGE("Error changing permissions of %s to 0660: %s",
config_file, strerror(errno));
unlink(config_file);
return -1;
}
if (chown(config_file, AID_SYSTEM, AID_WIFI) < 0) {
ALOGE("Error changing group ownership of %s to %d: %s",
config_file, AID_WIFI, strerror(errno));
unlink(config_file);
return -1;
}
return update_ctrl_interface(config_file);
}
int ensure_config_file_exists(const char *config_file)
{
char buf[2048];
int srcfd, destfd;
struct stat sb;
int nread;
int ret;
ret = access(config_file, R_OK|W_OK);
if ((ret == 0) || (errno == EACCES)) {
if ((ret != 0) &&
(chmod(config_file, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP) != 0)) {
ALOGE("Cannot set RW to \"%s\": %s", config_file, strerror(errno));
return -1;
}
/* return if we were able to update control interface properly */
if (update_ctrl_interface(config_file) >=0) {
return 0;
} else {
/* This handles the scenario where the file had bad data
* for some reason. We continue and recreate the file.
*/
}
} else if (errno != ENOENT) {
ALOGE("Cannot access \"%s\": %s", config_file, strerror(errno));
return -1;
}
srcfd = TEMP_FAILURE_RETRY(open(SUPP_CONFIG_TEMPLATE, O_RDONLY));
if (srcfd < 0) {
ALOGE("Cannot open \"%s\": %s", SUPP_CONFIG_TEMPLATE, strerror(errno));
return -1;
}
destfd = TEMP_FAILURE_RETRY(open(config_file, O_CREAT|O_RDWR, 0660));
if (destfd < 0) {
close(srcfd);
ALOGE("Cannot create \"%s\": %s", config_file, strerror(errno));
return -1;
}
while ((nread = TEMP_FAILURE_RETRY(read(srcfd, buf, sizeof(buf)))) != 0) {
if (nread < 0) {
ALOGE("Error reading \"%s\": %s", SUPP_CONFIG_TEMPLATE, strerror(errno));
close(srcfd);
close(destfd);
unlink(config_file);
return -1;
}
TEMP_FAILURE_RETRY(write(destfd, buf, nread));
}
if (!strcmp(config_file, SUPP_CONFIG_FILE)) {
TEMP_FAILURE_RETRY(write(destfd, P2P_DISABLE_PARM, strlen(P2P_DISABLE_PARM)));
}
close(destfd);
close(srcfd);
/* chmod is needed because open() didn't set permisions properly */
if (chmod(config_file, 0660) < 0) {
ALOGE("Error changing permissions of %s to 0660: %s",
config_file, strerror(errno));
unlink(config_file);
return -1;
}
if (chown(config_file, AID_SYSTEM, AID_WIFI) < 0) {
ALOGE("Error changing group ownership of %s to %d: %s",
config_file, AID_WIFI, strerror(errno));
unlink(config_file);
return -1;
}
return update_ctrl_interface(config_file);
}
