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LookingGlass/client/main.c
Geoffrey McRae 40bfdcdf8c [client] added configuration file loading support 
the client now will look for a configuration file in the following
locations by default.

* /etc/looking-glass.conf
* ~/.looking-glass.conf

All configuration files are loaded and may override values specified by
any prior configuration files loaded.

Sample Config:

    global:
    {
      fullScreen=false;
      showFPS=true;
      x=0;
      y=0;
      w=800;
      h=600;
    }

    OpenGL:
    {
      mipmap="false";
    }
2017-12-28 19:58:19 +11:00

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/*
Looking Glass - KVM FrameRelay (KVMFR) Client
Copyright (C) 2017 Geoffrey McRae <geoff@hostfission.com>
https://looking-glass.hostfission.com
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.
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., 59 Temple
Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <getopt.h>
#include <signal.h>
#include <SDL2/SDL.h>
#include <SDL2/SDL_syswm.h>
#include <SDL2/SDL_ttf.h>
#include <stdio.h>
#include <stdlib.h>
#include <pwd.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <stdint.h>
#include <stdbool.h>
#include <assert.h>
#include <libconfig.h>
#include <fontconfig/fontconfig.h>
#include "debug.h"
#include "utils.h"
#include "KVMFR.h"
#include "spice/spice.h"
#include "kb.h"
#include "lg-renderers.h"
struct AppState
{
bool running;
bool started;
TTF_Font * font;
SDL_Point srcSize;
LG_RendererRect dstRect;
SDL_Point cursor;
bool cursorVisible;
bool haveCursorPos;
float scaleX, scaleY;
const LG_Renderer * lgr ;
void * lgrData;
SDL_Window * window;
int shmFD;
struct KVMFRHeader * shm;
unsigned int shmSize;
};
typedef struct RenderOpts
{
unsigned int size;
unsigned int argc;
LG_RendererOptValue * argv;
}
RendererOpts;
struct AppParams
{
const char * configFile;
bool autoResize;
bool allowResize;
bool keepAspect;
bool borderless;
bool fullscreen;
bool center;
int x, y;
unsigned int w, h;
char * shmFile;
bool showFPS;
bool useSpice;
char * spiceHost;
unsigned int spicePort;
bool scaleMouseInput;
bool hideMouse;
bool ignoreQuit;
bool forceRenderer;
unsigned int forceRendererIndex;
RendererOpts rendererOpts[LG_RENDERER_COUNT];
};
struct AppState state;
struct AppParams params =
{
.configFile = "/etc/looking-glass.conf",
.autoResize = false,
.allowResize = true,
.keepAspect = true,
.borderless = false,
.fullscreen = false,
.center = true,
.x = 0,
.y = 0,
.w = 1024,
.h = 768,
.shmFile = "/dev/shm/looking-glass",
.showFPS = false,
.useSpice = true,
.spiceHost = "127.0.0.1",
.spicePort = 5900,
.scaleMouseInput = true,
.hideMouse = true,
.ignoreQuit = false,
.forceRenderer = false
};
static inline void updatePositionInfo()
{
if (!state.started)
return;
int w, h;
SDL_GetWindowSize(state.window, &w, &h);
if (params.keepAspect)
{
const float srcAspect = (float)state.srcSize.y / (float)state.srcSize.x;
const float wndAspect = (float)h / (float)w;
if (wndAspect < srcAspect)
{
state.dstRect.w = (float)h / srcAspect;
state.dstRect.h = h;
state.dstRect.x = (w >> 1) - (state.dstRect.w >> 1);
state.dstRect.y = 0;
}
else
{
state.dstRect.w = w;
state.dstRect.h = (float)w * srcAspect;
state.dstRect.x = 0;
state.dstRect.y = (h >> 1) - (state.dstRect.h >> 1);
}
}
else
{
state.dstRect.x = 0;
state.dstRect.y = 0;
state.dstRect.w = w;
state.dstRect.h = h;
}
state.scaleX = (float)state.srcSize.y / (float)state.dstRect.h;
state.scaleY = (float)state.srcSize.x / (float)state.dstRect.w;
DEBUG_INFO("client %dx%d, guest %dx%d, target %dx%d, scaleX: %.2f, scaleY %.2f",
w, h,
state.srcSize.x, state.srcSize.y,
state.dstRect.w, state.dstRect.h,
state.scaleX , state.scaleY
);
if (w != state.srcSize.x || h != state.srcSize.y)
DEBUG_WARN("Window size doesn't match guest resolution, cursor alignment may not be reliable");
if (state.lgr)
state.lgr->on_resize(state.lgrData, w, h, state.dstRect);
}
void mainThread()
{
while(state.running)
{
if (state.started)
{
if (!state.lgr->render(state.lgrData, state.window))
break;
}
else
usleep(1000);
}
}
int cursorThread(void * unused)
{
struct KVMFRHeader header;
LG_RendererCursor cursorType = LG_CURSOR_COLOR;
uint32_t version = 0;
memset(&header, 0, sizeof(struct KVMFRHeader));
while(state.running)
{
// poll until we have cursor data
if(!(state.shm->flags & KVMFR_HEADER_FLAG_CURSOR))
{
nsleep(100);
continue;
}
// we must take a copy of the header, both to let the guest advance and to
// prevent the contained arguments being abused to overflow buffers
memcpy(&header, (KVMFRHeader *)state.shm, sizeof(struct KVMFRHeader));
__sync_and_and_fetch(&state.shm->flags, ~KVMFR_HEADER_FLAG_CURSOR);
if (header.detail.cursor.flags & KVMFR_CURSOR_FLAG_SHAPE &&
header.detail.cursor.version != version)
{
version = header.detail.cursor.version;
bool bad = false;
switch(header.detail.cursor.type)
{
case CURSOR_TYPE_COLOR : cursorType = LG_CURSOR_COLOR ; break;
case CURSOR_TYPE_MONOCHROME : cursorType = LG_CURSOR_MONOCHROME ; break;
case CURSOR_TYPE_MASKED_COLOR: cursorType = LG_CURSOR_MASKED_COLOR; break;
default:
DEBUG_ERROR("Invalid cursor type");
bad = true;
break;
}
if (bad)
break;
// check the data position is sane
const uint64_t dataSize = header.detail.frame.height * header.detail.frame.pitch;
if (header.detail.cursor.dataPos + dataSize > state.shmSize)
{
DEBUG_ERROR("The guest sent an invalid mouse dataPos");
break;
}
const uint8_t * data = (const uint8_t *)state.shm + header.detail.cursor.dataPos;
if (!state.lgr->on_mouse_shape(
state.lgrData,
cursorType,
header.detail.cursor.width,
header.detail.cursor.height,
header.detail.cursor.pitch,
data)
)
{
DEBUG_ERROR("Failed to update mouse shape");
break;
}
}
if (header.detail.cursor.flags & KVMFR_CURSOR_FLAG_POS)
{
state.cursor.x = header.detail.cursor.x;
state.cursor.y = header.detail.cursor.y;
state.cursorVisible = header.detail.cursor.flags & KVMFR_CURSOR_FLAG_VISIBLE;
state.haveCursorPos = true;
state.lgr->on_mouse_event
(
state.lgrData,
state.cursorVisible,
state.cursor.x,
state.cursor.y
);
}
// poll until we have cursor data
while(((state.shm->flags & KVMFR_HEADER_FLAG_CURSOR) == 0) && state.running)
{
usleep(1000);
continue;
}
}
return 0;
}
int frameThread(void * unused)
{
bool error = false;
struct KVMFRHeader header;
memset(&header, 0, sizeof(struct KVMFRHeader));
while(state.running)
{
// poll until we have a new frame
if(!(state.shm->flags & KVMFR_HEADER_FLAG_FRAME))
{
nsleep(100);
continue;
}
// we must take a copy of the header, both to let the guest advance and to
// prevent the contained arguments being abused to overflow buffers
memcpy(&header, (KVMFRHeader *)state.shm, sizeof(struct KVMFRHeader));
__sync_and_and_fetch(&state.shm->flags, ~KVMFR_HEADER_FLAG_FRAME);
// sainty check of the frame format
if (
header.detail.frame.type >= FRAME_TYPE_MAX ||
header.detail.frame.width == 0 ||
header.detail.frame.height == 0 ||
header.detail.frame.stride == 0 ||
header.detail.frame.pitch == 0 ||
header.detail.frame.dataPos == 0 ||
header.detail.frame.dataPos > state.shmSize ||
header.detail.frame.pitch < header.detail.frame.width
){
usleep(1000);
continue;
}
// setup the renderer format with the frame format details
LG_RendererFormat lgrFormat;
lgrFormat.width = header.detail.frame.width;
lgrFormat.height = header.detail.frame.height;
lgrFormat.stride = header.detail.frame.stride;
lgrFormat.pitch = header.detail.frame.pitch;
switch(header.detail.frame.type)
{
case FRAME_TYPE_ARGB:
lgrFormat.bpp = 32;
break;
case FRAME_TYPE_RGB:
lgrFormat.bpp = 24;
break;
default:
DEBUG_ERROR("Unsupported frameType");
error = true;
break;
}
if (error)
break;
// check the header's dataPos is sane
const size_t dataSize = lgrFormat.height * lgrFormat.pitch;
if (header.detail.frame.dataPos + dataSize > state.shmSize)
{
DEBUG_ERROR("The guest sent an invalid dataPos");
break;
}
if (header.detail.frame.width != state.srcSize.x || header.detail.frame.height != state.srcSize.y)
{
state.srcSize.x = header.detail.frame.width;
state.srcSize.y = header.detail.frame.height;
if (params.autoResize)
SDL_SetWindowSize(state.window, header.detail.frame.width, header.detail.frame.height);
updatePositionInfo();
}
const uint8_t * data = (const uint8_t *)state.shm + header.detail.frame.dataPos;
if (!state.lgr->on_frame_event(state.lgrData, lgrFormat, data))
{
DEBUG_ERROR("renderer on frame event returned failure");
break;
}
if (!state.started)
{
state.started = true;
updatePositionInfo();
}
}
return 0;
}
int spiceThread(void * arg)
{
while(state.running)
if (!spice_process())
{
if (state.running)
{
state.running = false;
DEBUG_ERROR("failed to process spice messages");
}
break;
}
spice_disconnect();
return 0;
}
static inline const uint32_t mapScancode(SDL_Scancode scancode)
{
uint32_t ps2;
if (scancode > (sizeof(usb_to_ps2) / sizeof(uint32_t)) || (ps2 = usb_to_ps2[scancode]) == 0)
{
DEBUG_WARN("Unable to map USB scan code: %x\n", scancode);
return 0;
}
return ps2;
}
int eventThread(void * arg)
{
bool serverMode = false;
bool realignGuest = true;
bool keyDown[SDL_NUM_SCANCODES];
memset(keyDown, 0, sizeof(keyDown));
// ensure mouse acceleration is identical in server mode
SDL_SetHintWithPriority(SDL_HINT_MOUSE_RELATIVE_MODE_WARP, "1", SDL_HINT_OVERRIDE);
while(state.running)
{
SDL_Event event;
if (!SDL_PollEvent(&event))
{
usleep(1000);
continue;
}
switch(event.type)
{
case SDL_QUIT:
if (!params.ignoreQuit)
state.running = false;
break;
case SDL_WINDOWEVENT:
{
switch(event.window.event)
{
case SDL_WINDOWEVENT_ENTER:
realignGuest = true;
break;
case SDL_WINDOWEVENT_SIZE_CHANGED:
updatePositionInfo();
realignGuest = true;
break;
}
break;
}
}
if (!params.useSpice)
continue;
switch(event.type)
{
case SDL_KEYDOWN:
{
SDL_Scancode sc = event.key.keysym.scancode;
if (sc == SDL_SCANCODE_SCROLLLOCK)
{
if (event.key.repeat)
break;
serverMode = !serverMode;
spice_mouse_mode(serverMode);
SDL_SetRelativeMouseMode(serverMode);
if (!serverMode)
realignGuest = true;
break;
}
uint32_t scancode = mapScancode(sc);
if (scancode == 0)
break;
if (spice_key_down(scancode))
keyDown[sc] = true;
else
{
DEBUG_ERROR("SDL_KEYDOWN: failed to send message");
break;
}
break;
}
case SDL_KEYUP:
{
SDL_Scancode sc = event.key.keysym.scancode;
if (sc == SDL_SCANCODE_SCROLLLOCK)
break;
// avoid sending key up events when we didn't send a down
if (!keyDown[sc])
break;
uint32_t scancode = mapScancode(sc);
if (scancode == 0)
break;
if (spice_key_up(scancode))
keyDown[sc] = false;
else
{
DEBUG_ERROR("SDL_KEYUP: failed to send message");
break;
}
break;
}
case SDL_MOUSEWHEEL:
if (
!spice_mouse_press (event.wheel.y == 1 ? 4 : 5) ||
!spice_mouse_release(event.wheel.y == 1 ? 4 : 5)
)
{
DEBUG_ERROR("SDL_MOUSEWHEEL: failed to send messages");
break;
}
break;
case SDL_MOUSEMOTION:
{
if (
!serverMode && (
event.motion.x < state.dstRect.x ||
event.motion.x > state.dstRect.x + state.dstRect.w ||
event.motion.y < state.dstRect.y ||
event.motion.y > state.dstRect.y + state.dstRect.h
)
)
{
realignGuest = true;
break;
}
int x = 0;
int y = 0;
if (realignGuest && state.haveCursorPos)
{
x = event.motion.x - state.dstRect.x;
y = event.motion.y - state.dstRect.y;
if (params.scaleMouseInput)
{
x = (float)x * state.scaleX;
y = (float)y * state.scaleY;
}
x -= state.cursor.x;
y -= state.cursor.y;
realignGuest = false;
if (!spice_mouse_motion(x, y))
DEBUG_ERROR("SDL_MOUSEMOTION: failed to send message");
break;
}
x = event.motion.xrel;
y = event.motion.yrel;
if (x != 0 || y != 0)
{
if (params.scaleMouseInput)
{
x = (float)x * state.scaleX;
y = (float)y * state.scaleY;
}
if (!spice_mouse_motion(x, y))
{
DEBUG_ERROR("SDL_MOUSEMOTION: failed to send message");
break;
}
}
break;
}
case SDL_MOUSEBUTTONDOWN:
if (
!spice_mouse_position(event.button.x, event.button.y) ||
!spice_mouse_press(event.button.button)
)
{
DEBUG_ERROR("SDL_MOUSEBUTTONDOWN: failed to send message");
break;
}
break;
case SDL_MOUSEBUTTONUP:
if (
!spice_mouse_position(event.button.x, event.button.y) ||
!spice_mouse_release(event.button.button)
)
{
DEBUG_ERROR("SDL_MOUSEBUTTONUP: failed to send message");
break;
}
break;
default:
break;
}
}
return 0;
}
void intHandler(int signal)
{
switch(signal)
{
case SIGINT:
state.running = false;
break;
}
}
static void * map_memory()
{
struct stat st;
if (stat(params.shmFile, &st) < 0)
{
DEBUG_ERROR("Failed to stat the shared memory file: %s", params.shmFile);
return NULL;
}
state.shmSize = st.st_size;
state.shmFD = open(params.shmFile, O_RDWR, (mode_t)0600);
if (state.shmFD < 0)
{
DEBUG_ERROR("Failed to open the shared memory file: %s", params.shmFile);
return NULL;
}
void * map = mmap(0, st.st_size, PROT_READ | PROT_WRITE, MAP_SHARED, state.shmFD, 0);
if (map == MAP_FAILED)
{
DEBUG_ERROR("Failed to map the shared memory file: %s", params.shmFile);
close(state.shmFD);
state.shmFD = 0;
return NULL;
}
return map;
}
static bool try_renderer(const int index, const LG_RendererParams lgrParams, Uint32 * sdlFlags)
{
const LG_Renderer *r = LG_Renderers[index];
RendererOpts *opts = &params.rendererOpts[index];
if (!IS_LG_RENDERER_VALID(r))
{
DEBUG_ERROR("FIXME: Renderer %d is invalid, skipping", index);
return false;
}
// create the renderer
state.lgrData = NULL;
if (!r->create(&state.lgrData, lgrParams))
return false;
// set it's options
for(unsigned int i = 0; i < opts->argc; ++i)
opts->argv[i].opt->handler(state.lgrData, opts->argv[i].value);
// initialize the renderer
if (!r->initialize(state.lgrData, sdlFlags))
{
r->deinitialize(state.lgrData);
return false;
}
DEBUG_INFO("Using Renderer: %s", r->get_name());
return true;
}
int run()
{
DEBUG_INFO("Looking Glass (" BUILD_VERSION ")");
DEBUG_INFO("Locking Method: " LG_LOCK_MODE);
memset(&state, 0, sizeof(state));
state.running = true;
state.scaleX = 1.0f;
state.scaleY = 1.0f;
if (SDL_Init(SDL_INIT_VIDEO) < 0)
{
DEBUG_ERROR("SDL_Init Failed");
return -1;
}
// override SDL's SIGINIT handler so that we can tell the difference between
// SIGINT and the user sending a close event, such as ALT+F4
signal(SIGINT, intHandler);
if (params.showFPS)
{
if (TTF_Init() < 0)
{
DEBUG_ERROR("TTL_Init Failed");
return -1;
}
FcConfig * config = FcInitLoadConfigAndFonts();
if (!config)
{
DEBUG_ERROR("FcInitLoadConfigAndFonts Failed");
return -1;
}
FcPattern * pat = FcNameParse((const FcChar8*)"FreeMono");
FcConfigSubstitute (config, pat, FcMatchPattern);
FcDefaultSubstitute(pat);
FcResult result;
FcChar8 * file = NULL;
FcPattern * font = FcFontMatch(config, pat, &result);
if (font && (FcPatternGetString(font, FC_FILE, 0, &file) == FcResultMatch))
{
state.font = TTF_OpenFont((char *)file, 14);
if (!state.font)
{
DEBUG_ERROR("TTL_OpenFont Failed");
return -1;
}
}
else
{
DEBUG_ERROR("Failed to locate a font for FPS display");
return -1;
}
FcPatternDestroy(pat);
}
LG_RendererParams lgrParams;
lgrParams.font = state.font;
lgrParams.showFPS = params.showFPS;
Uint32 sdlFlags;
if (params.forceRenderer)
{
DEBUG_INFO("Trying forced renderer");
sdlFlags = 0;
if (!try_renderer(params.forceRendererIndex, lgrParams, &sdlFlags))
{
DEBUG_ERROR("Forced renderer failed to iniailize");
return -1;
}
state.lgr = LG_Renderers[params.forceRendererIndex];
}
else
{
// probe for a a suitable renderer
for(unsigned int i = 0; i < LG_RENDERER_COUNT; ++i)
{
sdlFlags = 0;
if (try_renderer(i, lgrParams, &sdlFlags))
{
state.lgr = LG_Renderers[i];
DEBUG_INFO("Using: %s", state.lgr->get_name());
break;
}
}
}
if (!state.lgr)
{
DEBUG_INFO("Unable to find a suitable renderer");
return -1;
}
state.window = SDL_CreateWindow(
"Looking Glass (Client)",
params.center ? SDL_WINDOWPOS_CENTERED : params.x,
params.center ? SDL_WINDOWPOS_CENTERED : params.y,
params.w,
params.h,
(
SDL_WINDOW_SHOWN |
(params.fullscreen ? SDL_WINDOW_FULLSCREEN_DESKTOP : 0) |
(params.allowResize ? SDL_WINDOW_RESIZABLE : 0) |
(params.borderless ? SDL_WINDOW_BORDERLESS : 0) |
sdlFlags
)
);
if (params.fullscreen)
{
SDL_SetHint(SDL_HINT_VIDEO_MINIMIZE_ON_FOCUS_LOSS, "0");
}
// set the compositor hint to bypass for low latency
SDL_SysWMinfo wminfo;
SDL_VERSION(&wminfo.version);
if (SDL_GetWindowWMInfo(state.window, &wminfo))
{
if (wminfo.subsystem == SDL_SYSWM_X11)
{
Atom NETWM_BYPASS_COMPOSITOR = XInternAtom(
wminfo.info.x11.display,
"NETWM_BYPASS_COMPOSITOR",
False);
unsigned long value = 1;
XChangeProperty(
wminfo.info.x11.display,
wminfo.info.x11.window,
NETWM_BYPASS_COMPOSITOR,
XA_CARDINAL,
32,
PropModeReplace,
(unsigned char *)&value,
1
);
}
}
if (!state.window)
{
DEBUG_ERROR("failed to create window");
return -1;
}
SDL_Cursor *cursor = NULL;
if (params.hideMouse)
{
// work around SDL_ShowCursor being non functional
int32_t cursorData[2] = {0, 0};
cursor = SDL_CreateCursor((uint8_t*)cursorData, (uint8_t*)cursorData, 8, 8, 4, 4);
SDL_SetCursor(cursor);
SDL_ShowCursor(SDL_DISABLE);
}
SDL_Thread *t_spice = NULL;
SDL_Thread *t_event = NULL;
while(1)
{
state.shm = (struct KVMFRHeader *)map_memory();
if (!state.shm)
{
DEBUG_ERROR("Failed to map memory");
break;
}
if (params.useSpice)
{
if (!spice_connect(params.spiceHost, params.spicePort, ""))
{
DEBUG_ERROR("Failed to connect to spice server");
return 0;
}
while(state.running && !spice_ready())
if (!spice_process())
{
state.running = false;
DEBUG_ERROR("Failed to process spice messages");
break;
}
if (!(t_spice = SDL_CreateThread(spiceThread, "spiceThread", NULL)))
{
DEBUG_ERROR("spice create thread failed");
break;
}
}
if (!(t_event = SDL_CreateThread(eventThread, "eventThread", NULL)))
{
DEBUG_ERROR("event create thread failed");
break;
}
// flag the host that we are starting up this is important so that
// the host wakes up if it is waiting on an interrupt, the host will
// also send us the current mouse shape since we won't know it yet
DEBUG_INFO("Waiting for host to signal it's ready...");
__sync_or_and_fetch(&state.shm->flags, KVMFR_HEADER_FLAG_RESTART);
while(state.running && (state.shm->flags & KVMFR_HEADER_FLAG_RESTART))
usleep(1000);
DEBUG_INFO("Host ready, starting session");
// check the header's magic and version are valid
if (memcmp(state.shm->magic, KVMFR_HEADER_MAGIC, sizeof(KVMFR_HEADER_MAGIC)) != 0)
{
DEBUG_ERROR("Invalid header magic, is the host running?");
break;
}
if (state.shm->version != KVMFR_HEADER_VERSION)
{
DEBUG_ERROR("KVMFR version missmatch, expected %u but got %u", KVMFR_HEADER_VERSION, state.shm->version);
DEBUG_ERROR("This is not a bug, ensure you have the right version of looking-glass-host.exe on the guest");
break;
}
if (!(t_event = SDL_CreateThread(cursorThread, "cursorThread", NULL)))
{
DEBUG_ERROR("cursor create thread failed");
break;
}
if (!(t_event = SDL_CreateThread(frameThread, "frameThread", NULL)))
{
DEBUG_ERROR("frame create thread failed");
break;
}
mainThread();
break;
}
state.running = false;
if (t_event)
SDL_WaitThread(t_event, NULL);
if (t_spice)
SDL_WaitThread(t_spice, NULL);
if (state.lgr)
state.lgr->deinitialize(state.lgrData);
if (state.window)
SDL_DestroyWindow(state.window);
if (cursor)
SDL_FreeCursor(cursor);
if (state.shm)
{
munmap(state.shm, state.shmSize);
close(state.shmFD);
}
TTF_Quit();
SDL_Quit();
return 0;
}
void doHelp(char * app)
{
char x[8], y[8];
snprintf(x, sizeof(x), "%d", params.x);
snprintf(y, sizeof(y), "%d", params.y);
fprintf(stderr,
"Looking Glass Client\n"
"Usage: %s [OPTION]...\n"
"Example: %s -h\n"
"\n"
" -h Print out this help\n"
"\n"
" -C PATH Specify an additional configuration file to load\n"
" -f PATH Specify the path to the shared memory file [current: %s]\n"
"\n"
" -s Disable spice client\n"
" -c HOST Specify the spice host [current: %s]\n"
" -p PORT Specify the spice port [current: %d]\n"
" -j Disable cursor position scaling\n"
" -M Don't hide the host cursor\n"
"\n"
" -k Enable FPS display\n"
" -g NAME Force the use of a specific renderer\n"
" -o OPTION Specify a renderer option (ie: opengl:vsync=0)\n"
" Alternatively specify \"list\" to list all renderers and their options\n"
"\n"
" -a Auto resize the window to the guest\n"
" -n Don't allow the window to be manually resized\n"
" -r Don't maintain the aspect ratio\n"
" -d Borderless mode\n"
" -F Borderless fullscreen mode\n"
" -x XPOS Initial window X position [current: %s]\n"
" -y YPOS Initial window Y position [current: %s]\n"
" -w WIDTH Initial window width [current: %u]\n"
" -b HEIGHT Initial window height [current: %u]\n"
" -Q Ignore requests to quit (ie: Alt+F4)\n"
"\n"
" -l License information\n"
"\n",
app,
app,
params.shmFile,
params.spiceHost,
params.spicePort,
params.center ? "center" : x,
params.center ? "center" : y,
params.w,
params.h
);
}
void doLicense()
{
fprintf(stderr,
"\n"
"Looking Glass - KVM FrameRelay (KVMFR) Client\n"
"Copyright(C) 2017 Geoffrey McRae <geoff@hostfission.com>\n"
"https://looking-glass.hostfission.com\n"
"\n"
"This program is free software; you can redistribute it and / or modify it under\n"
"the terms of the GNU General Public License as published by the Free Software\n"
"Foundation; either version 2 of the License, or (at your option) any later\n"
"version.\n"
"\n"
"This program is distributed in the hope that it will be useful, but WITHOUT ANY\n"
"WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A\n"
"PARTICULAR PURPOSE.See the GNU General Public License for more details.\n"
"\n"
"You should have received a copy of the GNU General Public License along with\n"
"this program; if not, write to the Free Software Foundation, Inc., 59 Temple\n"
"Place, Suite 330, Boston, MA 02111 - 1307 USA\n"
"\n"
);
}
static bool load_config(const char * configFile)
{
config_t cfg;
int itmp;
const char *stmp;
config_init(&cfg);
if (!config_read_file(&cfg, configFile))
{
DEBUG_ERROR("Config file error %s:%d - %s",
config_error_file(&cfg),
config_error_line(&cfg),
config_error_text(&cfg)
);
return false;
}
config_setting_t * global = config_lookup(&cfg, "global");
if (global)
{
if (config_setting_lookup_string(global, "shmFile", &stmp))
{
free(params.shmFile);
params.shmFile = strdup(stmp);
}
if (config_setting_lookup_string(global, "forceRenderer", &stmp))
{
bool ok = false;
for(unsigned int i = 0; i < LG_RENDERER_COUNT; ++i)
if (strcasecmp(LG_Renderers[i]->get_name(), stmp) == 0)
{
params.forceRenderer = true;
params.forceRendererIndex = i;
ok = true;
break;
}
if (!ok)
{
DEBUG_ERROR("No such renderer: %s", stmp);
config_destroy(&cfg);
return false;
}
}
if (config_setting_lookup_bool (global, "scaleMouseInput", &itmp)) params.scaleMouseInput = (itmp != 0);
if (config_setting_lookup_bool (global, "hideMouse" , &itmp)) params.hideMouse = (itmp != 0);
if (config_setting_lookup_bool (global, "showFPS" , &itmp)) params.showFPS = (itmp != 0);
if (config_setting_lookup_bool (global, "autoResize" , &itmp)) params.autoResize = (itmp != 0);
if (config_setting_lookup_bool (global, "allowResize" , &itmp)) params.allowResize = (itmp != 0);
if (config_setting_lookup_bool (global, "keepAspect" , &itmp)) params.keepAspect = (itmp != 0);
if (config_setting_lookup_bool (global, "borderless" , &itmp)) params.borderless = (itmp != 0);
if (config_setting_lookup_bool (global, "fullScreen" , &itmp)) params.fullscreen = (itmp != 0);
if (config_setting_lookup_bool (global, "ignoreQuit" , &itmp)) params.ignoreQuit = (itmp != 0);
if (config_setting_lookup_int(global, "x", &params.x)) params.center = false;
if (config_setting_lookup_int(global, "y", &params.y)) params.center = false;
if (config_setting_lookup_int(global, "w", &itmp))
{
if (itmp < 1)
{
DEBUG_ERROR("Invalid window width, must be greater then 1px");
config_destroy(&cfg);
return false;
}
params.w = (unsigned int)itmp;
}
if (config_setting_lookup_int(global, "h", &itmp))
{
if (itmp < 1)
{
DEBUG_ERROR("Invalid window height, must be greater then 1px");
config_destroy(&cfg);
return false;
}
params.h = (unsigned int)itmp;
}
}
for(unsigned int i = 0; i < LG_RENDERER_COUNT; ++i)
{
const LG_Renderer * r = LG_Renderers[i];
RendererOpts * opts = &params.rendererOpts[i];
config_setting_t * group = config_lookup(&cfg, r->get_name());
if (!group)
continue;
for(unsigned int j = 0; j < r->option_count; ++j)
{
const char * name = r->options[j].name;
if (!config_setting_lookup_string(group, name, &stmp))
continue;
if (r->options[j].validator && !r->options[j].validator(stmp))
{
DEBUG_ERROR("Renderer \"%s\" reported invalid value for option \"%s\"", r->get_name(), name);
config_destroy(&cfg);
return false;
}
if (opts->argc == opts->size)
{
opts->size += 5;
opts->argv = realloc(opts->argv, sizeof(LG_RendererOptValue) * opts->size);
}
opts->argv[opts->argc].opt = &r->options[j];
opts->argv[opts->argc].value = strdup(stmp);
++opts->argc;
}
}
config_destroy(&cfg);
return true;
}
int main(int argc, char * argv[])
{
params.shmFile = strdup(params.shmFile );
params.spiceHost = strdup(params.spiceHost);
{
// load any global then local config options first
struct stat st;
if (stat("/etc/looking-glass.conf", &st) >= 0)
{
DEBUG_INFO("Loading config from: /etc/looking-glass.conf");
if (!load_config("/etc/looking-glass.conf"))
return -1;
}
struct passwd * pw = getpwuid(getuid());
const char pattern[] = "%s/.looking-glass.conf";
const size_t len = strlen(pw->pw_dir) + sizeof(pattern);
char buffer[len];
snprintf(buffer, len, pattern, pw->pw_dir);
if (stat(buffer, &st) >= 0)
{
DEBUG_INFO("Loading config from: %s", buffer);
if (!load_config(buffer))
return -1;
}
}
for(;;)
{
switch(getopt(argc, argv, "hC:f:sc:p:jMvkg:o:anrdFx:y:w:b:Ql"))
{
case '?':
case 'h':
default :
doHelp(argv[0]);
return -1;
case -1:
break;
case 'C':
params.configFile = optarg;
if (!load_config(optarg))
return -1;
continue;
case 'f':
free(params.shmFile);
params.shmFile = strdup(optarg);
continue;
case 's':
params.useSpice = false;
continue;
case 'c':
free(params.spiceHost);
params.spiceHost = strdup(optarg);
continue;
case 'p':
params.spicePort = atoi(optarg);
continue;
case 'j':
params.scaleMouseInput = false;
continue;
case 'M':
params.hideMouse = false;
continue;
case 'k':
params.showFPS = true;
continue;
case 'g':
{
bool ok = false;
for(unsigned int i = 0; i < LG_RENDERER_COUNT; ++i)
if (strcasecmp(LG_Renderers[i]->get_name(), optarg) == 0)
{
params.forceRenderer = true;
params.forceRendererIndex = i;
ok = true;
break;
}
if (!ok)
{
fprintf(stderr, "No such renderer: %s\n", optarg);
fprintf(stderr, "Use '-o list' obtain a list of options\n");
doHelp(argv[0]);
return -1;
}
continue;
}
case 'o':
{
if (strcasecmp(optarg, "list") == 0)
{
size_t maxLen = 0;
for(unsigned int i = 0; i < LG_RENDERER_COUNT; ++i)
{
const LG_Renderer * r = LG_Renderers[i];
for(unsigned int j = 0; j < r->option_count; ++j)
{
const size_t len = strlen(r->options[j].name);
if (len > maxLen)
maxLen = len;
}
}
fprintf(stderr, "\nRenderer Option List\n");
for(unsigned int i = 0; i < LG_RENDERER_COUNT; ++i)
{
const LG_Renderer * r = LG_Renderers[i];
fprintf(stderr, "\n%s\n", r->get_name());
for(unsigned int j = 0; j < r->option_count; ++j)
{
const size_t pad = maxLen - strlen(r->options[j].name);
for(int i = 0; i < pad; ++i)
fputc(' ', stderr);
fprintf(stderr, " %s - %s\n", r->options[j].name, r->options[j].desc);
}
}
fprintf(stderr, "\n");
return -1;
}
const LG_Renderer * renderer = NULL;
RendererOpts * opts = NULL;
const size_t len = strlen(optarg);
const char * name = strtok(optarg, ":");
for(unsigned int i = 0; i < LG_RENDERER_COUNT; ++i)
if (strcasecmp(LG_Renderers[i]->get_name(), name) == 0)
{
renderer = LG_Renderers[i];
opts = &params.rendererOpts[i];
break;
}
if (!renderer)
{
fprintf(stderr, "No such renderer: %s\n", name);
doHelp(argv[0]);
return -1;
}
const char * option = strtok(NULL , "=");
if (!option)
{
fprintf(stderr, "Renderer option name not specified\n");
doHelp(argv[0]);
return -1;
}
const LG_RendererOpt * opt = NULL;
for(unsigned int i = 0; i < renderer->option_count; ++i)
if (strcasecmp(option, renderer->options[i].name) == 0)
{
opt = &renderer->options[i];
break;
}
if (!opt)
{
fprintf(stderr, "Renderer \"%s\" doesn't have the option: %s\n", renderer->get_name(), option);
doHelp(argv[0]);
return -1;
}
const char * value = NULL;
if (len > strlen(name) + strlen(option) + 2)
value = option + strlen(option) + 1;
if (opt->validator && !opt->validator(value))
{
fprintf(stderr, "Renderer \"%s\" reported invalid value for option \"%s\"\n", renderer->get_name(), option);
doHelp(argv[0]);
return -1;
}
if (opts->argc == opts->size)
{
opts->size += 5;
opts->argv = realloc(opts->argv, sizeof(LG_RendererOptValue) * opts->size);
}
opts->argv[opts->argc].opt = opt;
opts->argv[opts->argc].value = strdup(value);
++opts->argc;
continue;
}
case 'a':
params.autoResize = true;
continue;
case 'n':
params.allowResize = false;
continue;
case 'r':
params.keepAspect = false;
continue;
case 'd':
params.borderless = true;
continue;
case 'F':
params.fullscreen = true;
continue;
case 'x':
params.center = false;
params.x = atoi(optarg);
continue;
case 'y':
params.center = false;
params.y = atoi(optarg);
continue;
case 'w':
params.w = atoi(optarg);
continue;
case 'b':
params.h = atoi(optarg);
continue;
case 'Q':
params.ignoreQuit = true;
continue;
case 'l':
doLicense();
return 0;
}
break;
}
if (optind != argc)
{
fprintf(stderr, "A non option was supplied\n");
doHelp(argv[0]);
return -1;
}
const int ret = run();
free(params.shmFile);
free(params.spiceHost);
for(unsigned int i = 0; i < LG_RENDERER_COUNT; ++i)
{
RendererOpts * opts = &params.rendererOpts[i];
for(unsigned int j = 0; j < opts->argc; ++j)
free(opts->argv[j].value);
free(opts->argv);
}
return ret;
}
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