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/*
* idevicesyslog.c
* Relay the syslog of a device to stdout
*
* Copyright (c) 2009 Martin Szulecki All Rights Reserved.
*
* This library 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 2.1 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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 <stdio.h>
#include <string.h>
#include <errno.h>
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>
#ifdef WIN32
#include <windows.h>
#define sleep(x) Sleep(x*1000)
#endif
#include <libimobiledevice/libimobiledevice.h>
#include <libimobiledevice/lockdown.h>
#include "src/service.h"
#include "common/thread.h"
static int quit_flag = 0;
void print_usage(int argc, char **argv);
static char* udid = NULL;
static idevice_t device = NULL;
static service_client_t syslog = NULL;
thread_t worker = NULL;
static int logging = 0;
static void *syslog_worker(void *arg)
{
service_error_t ret = SERVICE_E_UNKNOWN_ERROR;
fprintf(stdout, "[connected]\n");
fflush(stdout);
logging = 1;
while (logging) {
char c;
uint32_t bytes = 0;
ret = service_receive_with_timeout(syslog, &c, 1, &bytes, 0);
if (ret < 0 || (bytes != 1)) {
printf("\n[connection interrupted]\n");
fflush(stdout);
break;
}
if(c != 0) {
putchar(c);
}
}
return NULL;
}
static int start_logging()
{
idevice_error_t ret = idevice_new(&device, udid);
if (ret != IDEVICE_E_SUCCESS) {
fprintf(stderr, "Device with udid %s not found!?\n", udid);
return -1;
}
/* start and connect to syslog_relay service */
service_error_t serr = SERVICE_E_UNKNOWN_ERROR;
service_client_factory_start_service(device, "com.apple.syslog_relay", (void**)&syslog, "idevicesyslog", NULL, &serr);
if (serr != SERVICE_E_SUCCESS) {
fprintf(stderr, "ERROR: Could not start service com.apple.syslog_relay.\n");
idevice_free(device);
device = NULL;
return -1;
}
/* start worker thread */
logging = 1;
if (thread_create(&worker, syslog_worker, NULL) != 0) {
logging = 0;
return -1;
}
return 0;
}
static void stop_logging()
{
if (logging) {
/* notify thread to finish */
logging = 0;
if (syslog) {
service_client_free(syslog);
syslog = NULL;
}
/* wait for thread to complete */
thread_join(worker);
}
if (device) {
idevice_free(device);
device = NULL;
}
}
static void device_event_cb(const idevice_event_t* event, void* userdata)
{
if (event->event == IDEVICE_DEVICE_ADD) {
if (!logging) {
if (!udid) {
udid = strdup(event->udid);
}
if (strcmp(udid, event->udid) == 0) {
if (start_logging() != 0) {
fprintf(stderr, "Could not start logger for udid %s\n", udid);
}
}
}
} else if (event->event == IDEVICE_DEVICE_REMOVE) {
if (logging && (strcmp(udid, event->udid) == 0)) {
stop_logging();
}
}
}
/**
* signal handler function for cleaning up properly
*/
static void clean_exit(int sig)
{
fprintf(stderr, "\nExiting...\n");
quit_flag++;
}
int main(int argc, char *argv[])
{
int i;
signal(SIGINT, clean_exit);
signal(SIGTERM, clean_exit);
#ifndef WIN32
signal(SIGQUIT, clean_exit);
signal(SIGPIPE, SIG_IGN);
#endif
/* parse cmdline args */
for (i = 1; i < argc; i++) {
if (!strcmp(argv[i], "-d") || !strcmp(argv[i], "--debug")) {
idevice_set_debug_level(1);
continue;
}
else if (!strcmp(argv[i], "-u") || !strcmp(argv[i], "--udid")) {
i++;
if (!argv[i] || (strlen(argv[i]) != 40)) {
print_usage(argc, argv);
return 0;
}
udid = strdup(argv[i]);
continue;
}
else if (!strcmp(argv[i], "-h") || !strcmp(argv[i], "--help")) {
print_usage(argc, argv);
return 0;
}
else {
print_usage(argc, argv);
return 0;
}
}
int num = 0;
char **devices = NULL;
idevice_get_device_list(&devices, &num);
idevice_device_list_free(devices);
if (num == 0) {
if (!udid) {
fprintf(stderr, "No device found. Plug in a device or pass UDID with -u to wait for device to be available.\n");
return -1;
} else {
fprintf(stderr, "Waiting for device with UDID %s to become available...\n", udid);
}
}
idevice_event_subscribe(device_event_cb, NULL);
while (!quit_flag) {
sleep(1);
}
idevice_event_unsubscribe();
stop_logging();
if (udid) {
free(udid);
}
return 0;
}
void print_usage(int argc, char **argv)
{
char *name = NULL;
name = strrchr(argv[0], '/');
printf("Usage: %s [OPTIONS]\n", (name ? name + 1: argv[0]));
printf("Relay syslog of a connected device.\n\n");
printf(" -d, --debug\t\tenable communication debugging\n");
printf(" -u, --udid UDID\ttarget specific device by its 40-digit device UDID\n");
printf(" -h, --help\t\tprints usage information\n");
printf("\n");
}
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