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xrdp-proprietary/sesman/chansrv/chansrv.c

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/**
* xrdp: A Remote Desktop Protocol server.
*
* Copyright (C) Jay Sorg 2009-2012
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "arch.h"
#include "os_calls.h"
#include "thread_calls.h"
#include "trans.h"
#include "chansrv.h"
#include "defines.h"
#include "sound.h"
#include "clipboard.h"
#include "devredir.h"
#include "list.h"
#include "file.h"
#include "file_loc.h"
#include "log.h"
#include "rail.h"
#include "xcommon.h"
static struct trans* g_lis_trans = 0;
static struct trans* g_con_trans = 0;
static struct trans* g_api_lis_trans = 0;
static struct trans* g_api_con_trans = 0;
static struct chan_item g_chan_items[32];
static int g_num_chan_items = 0;
static int g_cliprdr_index = -1;
static int g_rdpsnd_index = -1;
static int g_rdpdr_index = -1;
static int g_rail_index = -1;
static tbus g_term_event = 0;
static tbus g_thread_done_event = 0;
static int g_use_unix_socket = 0;
int g_display_num = 0;
int g_cliprdr_chan_id = -1; /* cliprdr */
int g_rdpsnd_chan_id = -1; /* rdpsnd */
int g_rdpdr_chan_id = -1; /* rdpdr */
int g_rail_chan_id = -1; /* rail */
char* g_exec_name;
tbus g_exec_event;
tbus g_exec_mutex;
tbus g_exec_sem;
int g_exec_pid = 0;
/* data in struct trans::callback_data */
struct xrdp_api_data
{
int chan_id;
char header[64];
int flags;
};
/*****************************************************************************/
/* add data to chan_item, on its way to the client */
/* returns error */
static int APP_CC
add_data_to_chan_item(struct chan_item* chan_item, char* data, int size)
{
struct stream* s;
struct chan_out_data* cod;
make_stream(s);
init_stream(s, size);
g_memcpy(s->data, data, size);
s->end = s->data + size;
cod = (struct chan_out_data*)g_malloc(sizeof(struct chan_out_data), 1);
cod->s = s;
if (chan_item->tail == 0)
{
chan_item->tail = cod;
chan_item->head = cod;
}
else
{
chan_item->tail->next = cod;
chan_item->tail = cod;
}
return 0;
}
/*****************************************************************************/
/* returns error */
static int APP_CC
send_data_from_chan_item(struct chan_item* chan_item)
{
struct stream* s;
struct chan_out_data* cod;
int bytes_left;
int size;
int chan_flags;
int error;
if (chan_item->head == 0)
{
return 0;
}
cod = chan_item->head;
bytes_left = (int)(cod->s->end - cod->s->p);
size = MIN(1600, bytes_left);
chan_flags = 0;
if (cod->s->p == cod->s->data)
{
chan_flags |= 1; /* first */
}
if (cod->s->p + size >= cod->s->end)
{
chan_flags |= 2; /* last */
}
s = trans_get_out_s(g_con_trans, 8192);
out_uint32_le(s, 0); /* version */
out_uint32_le(s, 8 + 8 + 2 + 2 + 2 + 4 + size); /* size */
out_uint32_le(s, 8); /* msg id */
out_uint32_le(s, 8 + 2 + 2 + 2 + 4 + size); /* size */
out_uint16_le(s, chan_item->id);
out_uint16_le(s, chan_flags);
out_uint16_le(s, size);
out_uint32_le(s, cod->s->size);
out_uint8a(s, cod->s->p, size);
s_mark_end(s);
LOGM((LOG_LEVEL_DEBUG, "chansrv::send_channel_data: -- "
"size %d chan_flags 0x%8.8x", size, chan_flags));
error = trans_force_write(g_con_trans);
if (error != 0)
{
return 1;
}
cod->s->p += size;
if (cod->s->p >= cod->s->end)
{
free_stream(cod->s);
chan_item->head = chan_item->head->next;
if (chan_item->head == 0)
{
chan_item->tail = 0;
}
g_free(cod);
}
return 0;
}
/*****************************************************************************/
/* returns error */
static int APP_CC
check_chan_items(void)
{
int index;
for (index = 0; index < g_num_chan_items; index++)
{
if (g_chan_items[index].head != 0)
{
send_data_from_chan_item(g_chan_items + index);
}
}
return 0;
}
/*****************************************************************************/
/* returns error */
int APP_CC
send_channel_data(int chan_id, char* data, int size)
{
int index;
LOGM((LOG_LEVEL_DEBUG, "chansrv::send_channel_data: size %d", size));
if (chan_id == -1)
{
return 1;
}
for (index = 0; index < g_num_chan_items; index++)
{
if (g_chan_items[index].id == chan_id)
{
add_data_to_chan_item(g_chan_items + index, data, size);
check_chan_items();
return 0;
}
}
return 1;
}
/*****************************************************************************/
/* returns error */
static int APP_CC
send_init_response_message(void)
{
struct stream * s = (struct stream *)NULL;
LOGM((LOG_LEVEL_INFO, "send_init_response_message:"));
s = trans_get_out_s(g_con_trans, 8192);
if (s == 0)
{
return 1;
}
out_uint32_le(s, 0); /* version */
out_uint32_le(s, 8 + 8); /* size */
out_uint32_le(s, 2); /* msg id */
out_uint32_le(s, 8); /* size */
s_mark_end(s);
return trans_force_write(g_con_trans);
}
/*****************************************************************************/
/* returns error */
static int APP_CC
send_channel_setup_response_message(void)
{
struct stream * s = (struct stream *)NULL;
LOGM((LOG_LEVEL_DEBUG, "send_channel_setup_response_message:"));
s = trans_get_out_s(g_con_trans, 8192);
if (s == 0)
{
return 1;
}
out_uint32_le(s, 0); /* version */
out_uint32_le(s, 8 + 8); /* size */
out_uint32_le(s, 4); /* msg id */
out_uint32_le(s, 8); /* size */
s_mark_end(s);
return trans_force_write(g_con_trans);
}
/*****************************************************************************/
/* returns error */
static int APP_CC
send_channel_data_response_message(void)
{
struct stream * s = (struct stream *)NULL;
LOGM((LOG_LEVEL_DEBUG, "send_channel_data_response_message:"));
s = trans_get_out_s(g_con_trans, 8192);
if (s == 0)
{
return 1;
}
out_uint32_le(s, 0); /* version */
out_uint32_le(s, 8 + 8); /* size */
out_uint32_le(s, 6); /* msg id */
out_uint32_le(s, 8); /* size */
s_mark_end(s);
return trans_force_write(g_con_trans);
}
/*****************************************************************************/
/* returns error */
static int APP_CC
process_message_init(struct stream* s)
{
LOGM((LOG_LEVEL_DEBUG, "process_message_init:"));
return send_init_response_message();
}
/*****************************************************************************/
/* returns error */
static int APP_CC
process_message_channel_setup(struct stream* s)
{
int num_chans;
int index;
int rv;
struct chan_item* ci;
g_num_chan_items = 0;
g_cliprdr_index = -1;
g_rdpsnd_index = -1;
g_rdpdr_index = -1;
g_rail_index = -1;
g_cliprdr_chan_id = -1;
g_rdpsnd_chan_id = -1;
g_rdpdr_chan_id = -1;
g_rail_chan_id = -1;
LOGM((LOG_LEVEL_DEBUG, "process_message_channel_setup:"));
in_uint16_le(s, num_chans);
LOGM((LOG_LEVEL_DEBUG, "process_message_channel_setup: num_chans %d",
num_chans));
for (index = 0; index < num_chans; index++)
{
ci = &(g_chan_items[g_num_chan_items]);
g_memset(ci->name, 0, sizeof(ci->name));
in_uint8a(s, ci->name, 8);
in_uint16_le(s, ci->id);
in_uint16_le(s, ci->flags);
LOGM((LOG_LEVEL_DEBUG, "process_message_channel_setup: chan name '%s' "
"id %d flags %8.8x", ci->name, ci->id, ci->flags));
if (g_strcasecmp(ci->name, "cliprdr") == 0)
{
g_cliprdr_index = g_num_chan_items;
g_cliprdr_chan_id = ci->id;
}
else if (g_strcasecmp(ci->name, "rdpsnd") == 0)
{
g_rdpsnd_index = g_num_chan_items;
g_rdpsnd_chan_id = ci->id;
}
else if (g_strcasecmp(ci->name, "rdpdr") == 0)
{
g_rdpdr_index = g_num_chan_items;
g_rdpdr_chan_id = ci->id;
}
else if (g_strcasecmp(ci->name, "rail") == 0)
{
g_rail_index = g_num_chan_items;
g_rail_chan_id = ci->id;
}
else
{
LOG(10, ("other %s", ci->name));
}
g_num_chan_items++;
}
rv = send_channel_setup_response_message();
if (g_cliprdr_index >= 0)
{
clipboard_init();
}
if (g_rdpsnd_index >= 0)
{
sound_init();
}
if (g_rdpdr_index >= 0)
{
dev_redir_init();
}
if (g_rail_index >= 0)
{
rail_init();
}
return rv;
}
/*****************************************************************************/
/* returns error */
static int APP_CC
process_message_channel_data(struct stream* s)
{
int chan_id = 0;
int chan_flags = 0;
int rv = 0;
int length = 0;
int total_length = 0;
struct stream* ls;
in_uint16_le(s, chan_id);
in_uint16_le(s, chan_flags);
in_uint16_le(s, length);
in_uint32_le(s, total_length);
LOGM((LOG_LEVEL_DEBUG,"process_message_channel_data: chan_id %d "
"chan_flags %d", chan_id, chan_flags));
LOG(10, ("process_message_channel_data"));
rv = send_channel_data_response_message();
if (rv == 0)
{
if (chan_id == g_cliprdr_chan_id)
{
rv = clipboard_data_in(s, chan_id, chan_flags, length, total_length);
}
else if (chan_id == g_rdpsnd_chan_id)
{
rv = sound_data_in(s, chan_id, chan_flags, length, total_length);
}
else if (chan_id == g_rdpdr_chan_id)
{
rv = dev_redir_data_in(s, chan_id, chan_flags, length, total_length);
}
else if (chan_id == g_rail_chan_id)
{
rv = rail_data_in(s, chan_id, chan_flags, length, total_length);
}
else if (chan_id == ((struct xrdp_api_data*)
(g_api_con_trans->callback_data))->chan_id)
{
LOG(10, ("process_message_channel_data length %d total_length %d "
"chan_flags 0x%8.8x", length, total_length, chan_flags));
ls = g_api_con_trans->out_s;
if (chan_flags & 1) /* first */
{
init_stream(ls, total_length);
}
out_uint8a(ls, s->p, length);
if (chan_flags & 2) /* last */
{
s_mark_end(ls);
trans_force_write(g_api_con_trans);
}
}
}
return rv;
}
/*****************************************************************************/
/* returns error */
static int APP_CC
process_message_channel_data_response(struct stream* s)
{
LOG(10, ("process_message_channel_data_response:"));
check_chan_items();
return 0;
}
/*****************************************************************************/
/* returns error */
static int APP_CC
process_message(void)
{
struct stream * s = (struct stream *)NULL;
int size = 0;
int id = 0;
int rv = 0;
char* next_msg = (char *)NULL;
if (g_con_trans == 0)
{
return 1;
}
s = trans_get_in_s(g_con_trans);
if (s == 0)
{
return 1;
}
rv = 0;
while (s_check_rem(s, 8))
{
next_msg = s->p;
in_uint32_le(s, id);
in_uint32_le(s, size);
next_msg += size;
switch (id)
{
case 1: /* init */
rv = process_message_init(s);
break;
case 3: /* channel setup */
rv = process_message_channel_setup(s);
break;
case 5: /* channel data */
rv = process_message_channel_data(s);
break;
case 7: /* channel data response */
rv = process_message_channel_data_response(s);
break;
default:
LOGM((LOG_LEVEL_ERROR, "process_message: error in process_message ",
"unknown msg %d", id));
break;
}
if (rv != 0)
{
break;
}
s->p = next_msg;
}
return rv;
}
/*****************************************************************************/
/* returns error */
int DEFAULT_CC
my_trans_data_in(struct trans* trans)
{
struct stream * s = (struct stream *)NULL;
int id = 0;
int size = 0;
int error = 0;
if (trans == 0)
{
return 0;
}
if (trans != g_con_trans)
{
return 1;
}
LOGM((LOG_LEVEL_DEBUG, "my_trans_data_in:"));
s = trans_get_in_s(trans);
in_uint32_le(s, id);
in_uint32_le(s, size);
error = trans_force_read(trans, size - 8);
if (error == 0)
{
/* here, the entire message block is read in, process it */
error = process_message();
}
return error;
}
/*****************************************************************************/
/* returns error */
int DEFAULT_CC
my_api_trans_data_in(struct trans* trans)
{
struct stream* s;
int error;
struct xrdp_api_data* ad;
LOG(10, ("my_api_trans_data_in:"));
if (trans == 0)
{
return 0;
}
if (trans != g_api_con_trans)
{
return 1;
}
LOGM((LOG_LEVEL_DEBUG, "my_api_trans_data_in:"));
s = trans_get_in_s(trans);
error = g_tcp_recv(trans->sck, s->data, 8192, 0);
if (error > 0)
{
LOG(10, ("my_api_trans_data_in: got data %d", error));
ad = (struct xrdp_api_data*)(trans->callback_data);
if (send_channel_data(ad->chan_id, s->data, error) != 0)
{
LOG(0, ("my_api_trans_data_in: send_channel_data failed"));
}
}
else
{
LOG(10, ("my_api_trans_data_in: g_tcp_recv failed, or disconnected"));
return 1;
}
return 0;
}
/*****************************************************************************/
int DEFAULT_CC
my_trans_conn_in(struct trans* trans, struct trans* new_trans)
{
if (trans == 0)
{
return 1;
}
if (trans != g_lis_trans)
{
return 1;
}
if (g_con_trans != 0) /* if already set, error */
{
return 1;
}
if (new_trans == 0)
{
return 1;
}
LOGM((LOG_LEVEL_DEBUG, "my_trans_conn_in:"));
g_con_trans = new_trans;
g_con_trans->trans_data_in = my_trans_data_in;
g_con_trans->header_size = 8;
/* stop listening */
trans_delete(g_lis_trans);
g_lis_trans = 0;
return 0;
}
/*****************************************************************************/
int DEFAULT_CC
my_api_trans_conn_in(struct trans* trans, struct trans* new_trans)
{
struct xrdp_api_data* ad;
int error;
int index;
int found;
struct stream* s;
if (trans == 0)
{
return 1;
}
if (trans != g_api_lis_trans)
{
return 1;
}
if (new_trans == 0)
{
return 1;
}
LOGM((LOG_LEVEL_DEBUG, "my_api_trans_conn_in:"));
LOG(10, ("my_api_trans_conn_in: got incoming"));
s = trans_get_in_s(new_trans);
s->end = s->data;
error = trans_force_read(new_trans, 64);
if (error != 0)
{
LOG(0, ("my_api_trans_conn_in: trans_force_read failed"));
trans_delete(new_trans);
}
s->end = s->data;
ad = (struct xrdp_api_data*)g_malloc(sizeof(struct xrdp_api_data), 1);
g_memcpy(ad->header, s->data, 64);
ad->flags = GGET_UINT32(ad->header, 16);
found = 0;
if (ad->flags | 1) /* WTS_CHANNEL_OPTION_DYNAMIC */
{
/* TODO */
found = 0;
}
else
{
for (index = 0; index < g_num_chan_items; index++)
{
LOG(10, (" %s %s", ad->header, g_chan_items[index].name));
if (g_strcasecmp(ad->header, g_chan_items[index].name) == 0)
{
LOG(10, ("my_api_trans_conn_in: found it at %d", index));
ad->chan_id = g_chan_items[index].id;
found = 1;
break;
}
}
}
LOG(10, ("my_api_trans_conn_in: found %d", found));
if (!found)
{
ad->chan_id = -1;
}
new_trans->callback_data = ad;
trans_delete(g_api_con_trans);
g_api_con_trans = new_trans;
g_api_con_trans->trans_data_in = my_api_trans_data_in;
g_api_con_trans->header_size = 0;
return 0;
}
/*****************************************************************************/
static int APP_CC
setup_listen(void)
{
char port[256];
int error = 0;
if (g_lis_trans != 0)
{
trans_delete(g_lis_trans);
}
if (g_use_unix_socket)
{
g_lis_trans = trans_create(2, 8192, 8192);
g_snprintf(port, 255, "/tmp/.xrdp/xrdp_chansrv_socket_%d",
7200 + g_display_num);
}
else
{
g_lis_trans = trans_create(1, 8192, 8192);
g_snprintf(port, 255, "%d", 7200 + g_display_num);
}
g_lis_trans->trans_conn_in = my_trans_conn_in;
error = trans_listen(g_lis_trans, port);
if (error != 0)
{
LOGM((LOG_LEVEL_ERROR, "setup_listen: trans_listen failed for port %s",
port));
return 1;
}
return 0;
}
/*****************************************************************************/
static int APP_CC
setup_api_listen(void)
{
char port[256];
int error = 0;
g_api_lis_trans = trans_create(2, 8192, 8192);
g_snprintf(port, 255, "/tmp/.xrdp/xrdpapi_%d", g_display_num);
g_api_lis_trans->trans_conn_in = my_api_trans_conn_in;
error = trans_listen(g_api_lis_trans, port);
if (error != 0)
{
LOGM((LOG_LEVEL_ERROR, "setup_api_listen: trans_listen failed for port %s",
port));
return 1;
}
return 0;
}
/*****************************************************************************/
THREAD_RV THREAD_CC
channel_thread_loop(void* in_val)
{
tbus objs[32];
int num_objs;
int timeout;
int error;
THREAD_RV rv;
LOGM((LOG_LEVEL_INFO, "channel_thread_loop: thread start"));
rv = 0;
setup_api_listen();
error = setup_listen();
if (error == 0)
{
timeout = -1;
num_objs = 0;
objs[num_objs] = g_term_event;
num_objs++;
trans_get_wait_objs(g_lis_trans, objs, &num_objs);
trans_get_wait_objs(g_api_lis_trans, objs, &num_objs);
while (g_obj_wait(objs, num_objs, 0, 0, timeout) == 0)
{
if (g_is_wait_obj_set(g_term_event))
{
LOGM((LOG_LEVEL_INFO, "channel_thread_loop: g_term_event set"));
clipboard_deinit();
sound_deinit();
dev_redir_deinit();
rail_deinit();
break;
}
if (g_lis_trans != 0)
{
if (trans_check_wait_objs(g_lis_trans) != 0)
{
LOGM((LOG_LEVEL_INFO, "channel_thread_loop: "
"trans_check_wait_objs error"));
}
}
if (g_con_trans != 0)
{
if (trans_check_wait_objs(g_con_trans) != 0)
{
LOGM((LOG_LEVEL_INFO, "channel_thread_loop: "
"trans_check_wait_objs error resetting"));
clipboard_deinit();
sound_deinit();
dev_redir_deinit();
rail_deinit();
/* delete g_con_trans */
trans_delete(g_con_trans);
g_con_trans = 0;
/* create new listener */
error = setup_listen();
if (error != 0)
{
break;
}
}
}
if (g_api_lis_trans != 0)
{
if (trans_check_wait_objs(g_api_lis_trans) != 0)
{
LOG(0, ("channel_thread_loop: trans_check_wait_objs failed"));
}
}
LOG(10, ("0 %p", g_api_con_trans));
if (g_api_con_trans != 0)
{
LOG(10, ("1 %p %d", g_api_con_trans, g_tcp_can_recv(g_api_con_trans->sck, 0)));
if (trans_check_wait_objs(g_api_con_trans) != 0)
{
LOG(10, ("channel_thread_loop: trans_check_wait_objs failed, "
"or disconnected"));
g_free(g_api_con_trans->callback_data);
trans_delete(g_api_con_trans);
g_api_con_trans = 0;
}
}
xcommon_check_wait_objs();
sound_check_wait_objs();
dev_redir_check_wait_objs();
timeout = -1;
num_objs = 0;
objs[num_objs] = g_term_event;
num_objs++;
trans_get_wait_objs(g_lis_trans, objs, &num_objs);
trans_get_wait_objs(g_con_trans, objs, &num_objs);
trans_get_wait_objs(g_api_lis_trans, objs, &num_objs);
trans_get_wait_objs(g_api_con_trans, objs, &num_objs);
xcommon_get_wait_objs(objs, &num_objs, &timeout);
sound_get_wait_objs(objs, &num_objs, &timeout);
dev_redir_get_wait_objs(objs, &num_objs, &timeout);
}
}
trans_delete(g_lis_trans);
g_lis_trans = 0;
trans_delete(g_con_trans);
g_con_trans = 0;
trans_delete(g_api_lis_trans);
g_api_lis_trans = 0;
trans_delete(g_api_con_trans);
g_api_con_trans = 0;
LOGM((LOG_LEVEL_INFO, "channel_thread_loop: thread stop"));
g_set_wait_obj(g_thread_done_event);
return rv;
}
/*****************************************************************************/
void DEFAULT_CC
term_signal_handler(int sig)
{
LOGM((LOG_LEVEL_INFO, "term_signal_handler: got signal %d", sig));
g_set_wait_obj(g_term_event);
}
/*****************************************************************************/
void DEFAULT_CC
nil_signal_handler(int sig)
{
LOGM((LOG_LEVEL_INFO, "nil_signal_handler: got signal %d", sig));
}
/*****************************************************************************/
void DEFAULT_CC
child_signal_handler(int sig)
{
int i1;
LOG(10, ("child_signal_handler:"));
do
{
i1 = g_waitchild();
if (i1 == g_exec_pid)
{
LOG(0, ("child_signal_handler: found pid %d", i1));
//shutdownx();
}
LOG(10, (" %d", i1));
} while (i1 >= 0);
}
/*****************************************************************************/
static int APP_CC
get_display_num_from_display(char* display_text)
{
int index;
int mode;
int host_index;
int disp_index;
int scre_index;
char host[256];
char disp[256];
char scre[256];
g_memset(host, 0, 256);
g_memset(disp, 0, 256);
g_memset(scre, 0, 256);
index = 0;
host_index = 0;
disp_index = 0;
scre_index = 0;
mode = 0;
while (display_text[index] != 0)
{
if (display_text[index] == ':')
{
mode = 1;
}
else if (display_text[index] == '.')
{
mode = 2;
}
else if (mode == 0)
{
host[host_index] = display_text[index];
host_index++;
}
else if (mode == 1)
{
disp[disp_index] = display_text[index];
disp_index++;
}
else if (mode == 2)
{
scre[scre_index] = display_text[index];
scre_index++;
}
index++;
}
host[host_index] = 0;
disp[disp_index] = 0;
scre[scre_index] = 0;
g_display_num = g_atoi(disp);
return 0;
}
/*****************************************************************************/
int APP_CC
main_cleanup(void)
{
g_delete_wait_obj(g_term_event);
g_delete_wait_obj(g_thread_done_event);
g_delete_wait_obj(g_exec_event);
tc_mutex_delete(g_exec_mutex);
g_deinit(); /* os_calls */
return 0;
}
/*****************************************************************************/
static int APP_CC
read_ini(void)
{
char filename[256];
struct list* names;
struct list* values;
char* name;
char* value;
int index;
g_memset(filename,0,(sizeof(char) * 256));
names = list_create();
names->auto_free = 1;
values = list_create();
values->auto_free = 1;
g_use_unix_socket = 0;
g_snprintf(filename, 255, "%s/sesman.ini", XRDP_CFG_PATH);
if (file_by_name_read_section(filename, "Globals", names, values) == 0)
{
for (index = 0; index < names->count; index++)
{
name = (char*)list_get_item(names, index);
value = (char*)list_get_item(values, index);
if (g_strcasecmp(name, "ListenAddress") == 0)
{
if (g_strcasecmp(value, "127.0.0.1") == 0)
{
g_use_unix_socket = 1;
}
}
}
}
list_delete(names);
list_delete(values);
return 0;
}
/*****************************************************************************/
static int APP_CC
run_exec(void)
{
int pid;
LOG(10, ("run_exec:"));
pid = g_fork();
if (pid == 0)
{
trans_delete(g_con_trans);
g_close_wait_obj(g_term_event);
g_close_wait_obj(g_thread_done_event);
g_close_wait_obj(g_exec_event);
tc_mutex_delete(g_exec_mutex);
tc_sem_delete(g_exec_sem);
g_execlp3(g_exec_name, g_exec_name, 0);
g_exit(0);
}
g_exec_pid = pid;
tc_sem_inc(g_exec_sem);
return 0;
}
/*****************************************************************************/
int DEFAULT_CC
main(int argc, char** argv)
{
tbus waiters[4];
int pid = 0;
char text[256];
char* home_text;
char* display_text;
char log_file[256];
enum logReturns error;
struct log_config logconfig;
g_init("xrdp-chansrv"); /* os_calls */
home_text = g_getenv("HOME");
if (home_text == 0)
{
g_writeln("error reading HOME environment variable");
g_deinit();
return 1;
}
read_ini();
pid = g_getpid();
/* starting logging subsystem */
g_memset(&logconfig, 0, sizeof(struct log_config));
logconfig.program_name = "XRDP-Chansrv";
g_snprintf(log_file, 255, "%s/xrdp-chansrv.log", home_text);
g_writeln("chansrv::main: using log file [%s]", log_file);
if (g_file_exist(log_file))
{
g_file_delete(log_file);
}
logconfig.log_file = log_file;
logconfig.fd = -1;
logconfig.log_level = LOG_LEVEL_ERROR;
logconfig.enable_syslog = 0;
logconfig.syslog_level = 0;
error = log_start_from_param(&logconfig);
if (error != LOG_STARTUP_OK)
{
switch (error)
{
case LOG_ERROR_MALLOC:
g_writeln("error on malloc. cannot start logging. quitting.");
break;
case LOG_ERROR_FILE_OPEN:
g_writeln("error opening log file [%s]. quitting.",
getLogFile(text, 255));
break;
default:
g_writeln("log_start error");
break;
}
g_deinit();
return 1;
}
LOGM((LOG_LEVEL_ALWAYS, "main: app started pid %d(0x%8.8x)", pid, pid));
/* set up signal handler */
g_signal_kill(term_signal_handler); /* SIGKILL */
g_signal_terminate(term_signal_handler); /* SIGTERM */
g_signal_user_interrupt(term_signal_handler); /* SIGINT */
g_signal_pipe(nil_signal_handler); /* SIGPIPE */
g_signal_child_stop(child_signal_handler); /* SIGCHLD */
display_text = g_getenv("DISPLAY");
LOGM((LOG_LEVEL_INFO, "main: DISPLAY env var set to %s", display_text));
get_display_num_from_display(display_text);
if (g_display_num == 0)
{
LOGM((LOG_LEVEL_ERROR, "main: error, display is zero"));
g_deinit();
return 1;
}
LOGM((LOG_LEVEL_INFO, "main: using DISPLAY %d", g_display_num));
g_snprintf(text, 255, "xrdp_chansrv_%8.8x_main_term", pid);
g_term_event = g_create_wait_obj(text);
g_snprintf(text, 255, "xrdp_chansrv_%8.8x_thread_done", pid);
g_thread_done_event = g_create_wait_obj(text);
g_snprintf(text, 255, "xrdp_chansrv_%8.8x_exec", pid);
g_exec_event = g_create_wait_obj(text);
g_exec_mutex = tc_mutex_create();
g_exec_sem = tc_sem_create(0);
tc_thread_create(channel_thread_loop, 0);
while (g_term_event > 0 && !g_is_wait_obj_set(g_term_event))
{
waiters[0] = g_term_event;
waiters[1] = g_exec_event;
if (g_obj_wait(waiters, 2, 0, 0, 0) != 0)
{
LOGM((LOG_LEVEL_ERROR, "main: error, g_obj_wait failed"));
break;
}
if (g_is_wait_obj_set(g_term_event))
{
break;
}
if (g_is_wait_obj_set(g_exec_event))
{
g_reset_wait_obj(g_exec_event);
run_exec();
}
}
while (g_thread_done_event > 0 && !g_is_wait_obj_set(g_thread_done_event))
{
/* wait for thread to exit */
if (g_obj_wait(&g_thread_done_event, 1, 0, 0, 0) != 0)
{
LOGM((LOG_LEVEL_ERROR, "main: error, g_obj_wait failed"));
break;
}
}
/* cleanup */
main_cleanup();
LOGM((LOG_LEVEL_INFO, "main: app exiting pid %d(0x%8.8x)", pid, pid));
g_deinit();
return 0;
}
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