mirror of
https://gitlab.freedesktop.org/cairo/cairo.git
synced 2025-12-20 21:00:10 +01:00
1533 lines
32 KiB
C
1533 lines
32 KiB
C
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/mman.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/poll.h>
|
|
#include <sys/un.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <signal.h>
|
|
#include <errno.h>
|
|
#include <assert.h>
|
|
#include <pthread.h>
|
|
|
|
#include <cairo.h>
|
|
#include <cairo-script.h>
|
|
#include <cairo-script-interpreter.h>
|
|
#include <cairo-boilerplate.h>
|
|
|
|
#include <glib.h> /* for checksumming */
|
|
|
|
#ifndef CAIRO_HAS_REAL_PTHREAD
|
|
# error "cairo-sphinx needs real pthreads"
|
|
#endif
|
|
|
|
#define DATA_SIZE (256 << 20)
|
|
#define SHM_PATH_XXX "/shmem-cairo-sphinx"
|
|
|
|
struct client {
|
|
int sk;
|
|
const cairo_boilerplate_target_t *target;
|
|
cairo_surface_t *surface;
|
|
void *base;
|
|
|
|
cairo_script_interpreter_t *csi;
|
|
struct context_closure {
|
|
struct context_closure *next;
|
|
unsigned long id;
|
|
cairo_t *context;
|
|
cairo_surface_t *surface;
|
|
cairo_surface_t *original;
|
|
} *contexts;
|
|
|
|
unsigned long context_id;
|
|
};
|
|
|
|
struct surface_tag {
|
|
long width, height;
|
|
};
|
|
static const cairo_user_data_key_t surface_tag;
|
|
|
|
static int
|
|
client_socket (const char *socket_path);
|
|
|
|
static int
|
|
writen (int fd, const void *ptr, int len)
|
|
{
|
|
#if 1
|
|
const uint8_t *data = ptr;
|
|
while (len) {
|
|
int ret = write (fd, data, len);
|
|
if (ret < 0) {
|
|
switch (errno) {
|
|
case EAGAIN:
|
|
case EINTR:
|
|
continue;
|
|
default:
|
|
return FALSE;
|
|
}
|
|
} else if (ret == 0) {
|
|
return FALSE;
|
|
} else {
|
|
data += ret;
|
|
len -= ret;
|
|
}
|
|
}
|
|
return TRUE;
|
|
#else
|
|
int ret = send (fd, ptr, len, 0);
|
|
return ret == len;
|
|
#endif
|
|
}
|
|
|
|
static int
|
|
readn (int fd, void *ptr, int len)
|
|
{
|
|
#if 0
|
|
uint8_t *data = ptr;
|
|
while (len) {
|
|
int ret = read (fd, data, len);
|
|
if (ret < 0) {
|
|
switch (errno) {
|
|
case EAGAIN:
|
|
case EINTR:
|
|
continue;
|
|
default:
|
|
return FALSE;
|
|
}
|
|
} else if (ret == 0) {
|
|
return FALSE;
|
|
} else {
|
|
data += ret;
|
|
len -= ret;
|
|
}
|
|
}
|
|
return TRUE;
|
|
#else
|
|
int ret = recv (fd, ptr, len, MSG_WAITALL);
|
|
return ret == len;
|
|
#endif
|
|
}
|
|
static int
|
|
open_devnull_to_fd (int want_fd, int flags)
|
|
{
|
|
int error;
|
|
int got_fd;
|
|
|
|
close (want_fd);
|
|
|
|
got_fd = open("/dev/null", flags | O_CREAT, 0700);
|
|
if (got_fd == -1)
|
|
return -1;
|
|
|
|
error = dup2 (got_fd, want_fd);
|
|
close (got_fd);
|
|
|
|
return error;
|
|
}
|
|
|
|
static int
|
|
daemonize (void)
|
|
{
|
|
void (*oldhup) (int);
|
|
|
|
/* Let the parent go. */
|
|
switch (fork ()) {
|
|
case -1: return -1;
|
|
case 0: break;
|
|
default: _exit (0);
|
|
}
|
|
|
|
/* Become session leader. */
|
|
if (setsid () == -1)
|
|
return -1;
|
|
|
|
/* Refork to yield session leadership. */
|
|
oldhup = signal (SIGHUP, SIG_IGN);
|
|
switch (fork ()) {
|
|
case -1: return -1;
|
|
case 0: break;
|
|
default: _exit (0);
|
|
}
|
|
signal (SIGHUP, oldhup);
|
|
|
|
/* Establish stdio. */
|
|
if (open_devnull_to_fd (0, O_RDONLY) == -1)
|
|
return -1;
|
|
if (open_devnull_to_fd (1, O_WRONLY | O_APPEND) == -1)
|
|
return -1;
|
|
if (dup2 (1, 2) == -1)
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
server_socket (const char *socket_path)
|
|
{
|
|
long flags;
|
|
struct sockaddr_un addr;
|
|
int sk;
|
|
|
|
unlink (socket_path);
|
|
|
|
sk = socket (PF_UNIX, SOCK_STREAM, 0);
|
|
if (sk == -1)
|
|
return -1;
|
|
|
|
memset (&addr, 0, sizeof (addr));
|
|
addr.sun_family = AF_UNIX;
|
|
strcpy (addr.sun_path, socket_path);
|
|
if (bind (sk, (struct sockaddr *) &addr, sizeof (addr)) == -1) {
|
|
close (sk);
|
|
return -1;
|
|
}
|
|
|
|
flags = fcntl (sk, F_GETFL);
|
|
if (flags == -1 || fcntl (sk, F_SETFL, flags | O_NONBLOCK) == -1) {
|
|
close (sk);
|
|
return -1;
|
|
}
|
|
|
|
if (listen (sk, 5) == -1) {
|
|
close (sk);
|
|
return -1;
|
|
}
|
|
|
|
return sk;
|
|
}
|
|
|
|
static int
|
|
readline (int fd, char *line, int max)
|
|
{
|
|
int len = 0;
|
|
do {
|
|
int ret = read (fd, &line[len], 1);
|
|
if (ret <= 0)
|
|
return -1;
|
|
} while (line[len] != '\n' && ++len < max);
|
|
line[len] = '\0';
|
|
return len;
|
|
}
|
|
|
|
struct clients {
|
|
int count, size;
|
|
int complete;
|
|
|
|
cairo_surface_t *recording;
|
|
unsigned long serial;
|
|
|
|
struct client_info {
|
|
int sk;
|
|
int trace;
|
|
unsigned long image_serial;
|
|
cairo_surface_t *image;
|
|
char *name;
|
|
char *target;
|
|
char *reference;
|
|
|
|
uint8_t *out_buf;
|
|
int out_len;
|
|
int out_size;
|
|
} *clients;
|
|
const char *shm_path;
|
|
unsigned long offset;
|
|
uint8_t *base;
|
|
};
|
|
|
|
static void *
|
|
clients_shm (const char *shm_path)
|
|
{
|
|
void *base;
|
|
int fd;
|
|
|
|
shm_unlink (shm_path);
|
|
fd = shm_open (shm_path, O_RDWR | O_EXCL | O_CREAT, 0777);
|
|
if (fd == -1)
|
|
return MAP_FAILED;
|
|
|
|
if (ftruncate (fd, DATA_SIZE) == -1) {
|
|
close (fd);
|
|
return MAP_FAILED;
|
|
}
|
|
|
|
base = mmap (NULL, DATA_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
|
|
close (fd);
|
|
|
|
return base;
|
|
}
|
|
|
|
static int
|
|
clients_init (struct clients *clients)
|
|
{
|
|
clients->count = 0;
|
|
clients->complete = 0;
|
|
clients->size = 4;
|
|
clients->clients = xmalloc (clients->size * sizeof (struct client_info));
|
|
|
|
clients->shm_path = SHM_PATH_XXX;
|
|
clients->base = clients_shm (clients->shm_path);
|
|
if (clients->base == MAP_FAILED)
|
|
return -1;
|
|
clients->offset = 0;
|
|
|
|
clients->recording = NULL;
|
|
clients->serial = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
clients_add_command (struct clients *clients, int fd, char *info)
|
|
{
|
|
struct client_info *c;
|
|
char buf[1024];
|
|
int len;
|
|
char *str;
|
|
|
|
if (clients->count == clients->size) {
|
|
clients->size *= 2;
|
|
clients->clients = xrealloc (clients->clients,
|
|
clients->size * sizeof (struct client_info));
|
|
}
|
|
|
|
c = &clients->clients[clients->count++];
|
|
c->sk = fd;
|
|
c->trace = -1;
|
|
c->image_serial = 0;
|
|
c->image = NULL;
|
|
c->name = c->target = c->reference = NULL;
|
|
|
|
c->out_size = 8192;
|
|
c->out_buf = xmalloc (c->out_size);
|
|
c->out_len = 0;
|
|
|
|
str = strstr (info, "name=");
|
|
if (str != NULL) {
|
|
char *sp = strchr (str + 5, ' ');
|
|
int len;
|
|
if (sp)
|
|
len = sp - str - 5;
|
|
else
|
|
len = strlen (str + 5);
|
|
c->name = xmalloc (len + 1);
|
|
memcpy (c->name, str + 5, len);
|
|
c->name[len] = '\0';
|
|
}
|
|
|
|
str = strstr (info, "target=");
|
|
if (str != NULL) {
|
|
char *sp = strchr (str + 7, ' ');
|
|
int len;
|
|
if (sp)
|
|
len = sp - str - 7;
|
|
else
|
|
len = strlen (str + 7);
|
|
c->target = xmalloc (len + 1);
|
|
memcpy (c->target, str + 7, len);
|
|
c->target[len] = '\0';
|
|
}
|
|
|
|
str = strstr (info, "reference=");
|
|
if (str != NULL) {
|
|
char *sp = strchr (str + 10, ' ');
|
|
int len;
|
|
if (sp)
|
|
len = sp - str - 10;
|
|
else
|
|
len = strlen (str + 10);
|
|
c->reference = xmalloc (len + 1);
|
|
memcpy (c->reference, str + 10, len);
|
|
c->reference[len] = '\0';
|
|
}
|
|
|
|
len = sprintf (buf, "%s\n", clients->shm_path);
|
|
writen (fd, buf, len);
|
|
}
|
|
|
|
static void
|
|
clients_add_trace (struct clients *clients, int fd, char *info)
|
|
{
|
|
char *str, *sp;
|
|
char *name;
|
|
int i;
|
|
|
|
str = strstr (info, "name=");
|
|
assert (str != NULL);
|
|
sp = strchr (str + 5, ' ');
|
|
if (sp)
|
|
i = sp - str - 5;
|
|
else
|
|
i = strlen (str + 5);
|
|
|
|
name = xmalloc (i + 1);
|
|
memcpy (name, str + 5, i);
|
|
name[i] = '\0';
|
|
|
|
for (i = 0; i < clients->count; i++) {
|
|
struct client_info *c = &clients->clients[i];
|
|
if (strcmp (name, c->name) == 0) {
|
|
c->trace = fd;
|
|
break;
|
|
}
|
|
}
|
|
|
|
free (name);
|
|
}
|
|
|
|
static int
|
|
clients_image (struct clients *clients, int fd, char *info)
|
|
{
|
|
struct client_info *c = NULL;
|
|
int format, width, height, stride, size;
|
|
int i;
|
|
|
|
for (i = 0; i < clients->count; i++) {
|
|
if (clients->clients[i].sk == fd) {
|
|
c = &clients->clients[i];
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (c == NULL)
|
|
return 0;
|
|
|
|
if (sscanf (info, "%lu %d %d %d %d",
|
|
&c->image_serial, &format, &width, &height, &stride) != 5)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
size = height * stride;
|
|
size = (size + 4095) & -4096;
|
|
assert (clients->offset + size <= DATA_SIZE);
|
|
|
|
c->image =
|
|
cairo_image_surface_create_for_data (clients->base + clients->offset,
|
|
format, width, height, stride);
|
|
|
|
if (! writen (fd, &clients->offset, sizeof (clients->offset)))
|
|
return 0;
|
|
|
|
clients->offset += size;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
u8_cmp (const void *A, const void *B)
|
|
{
|
|
const uint8_t *a = A, *b = B;
|
|
return (int) *a - (int) *b;
|
|
}
|
|
|
|
static uint8_t
|
|
median (uint8_t *values, int count)
|
|
{
|
|
/* XXX could use a fast median here if we cared */
|
|
qsort (values, count, 1, u8_cmp);
|
|
return values[count/2];
|
|
}
|
|
|
|
static uint32_t
|
|
get_pixel32 (int x, int y, const uint8_t *data, int stride)
|
|
{
|
|
return ((uint32_t *)(data + y * stride))[x];
|
|
}
|
|
|
|
static uint8_t
|
|
get_median_32 (int x, int y, int channel,
|
|
const uint8_t *data, int width, int height, int stride)
|
|
{
|
|
uint8_t neighbourhood[25];
|
|
int cnt = 0;
|
|
int xx, yy;
|
|
|
|
for (yy = y - 2; yy <= y + 2; yy++) {
|
|
if (yy < 0)
|
|
continue;
|
|
if (yy >= height)
|
|
continue;
|
|
|
|
for (xx = x - 2; xx <= x + 2; xx++) {
|
|
if (xx < 0)
|
|
continue;
|
|
if (xx >= width)
|
|
continue;
|
|
|
|
neighbourhood[cnt++] = (get_pixel32 (xx, yy, data, stride) >> (channel*8)) & 0xff;
|
|
}
|
|
}
|
|
|
|
return median (neighbourhood, cnt);
|
|
}
|
|
|
|
static uint8_t
|
|
get_pixel8 (int x, int y, const uint8_t *data, int stride)
|
|
{
|
|
return data[y * stride + x];
|
|
}
|
|
|
|
static uint8_t
|
|
get_median_8 (int x, int y, const uint8_t *data, int width, int height, int stride)
|
|
{
|
|
uint8_t neighbourhood[25];
|
|
int cnt = 0;
|
|
int xx, yy;
|
|
|
|
for (yy = y - 2; yy <= y + 2; yy++) {
|
|
if (yy < 0)
|
|
continue;
|
|
if (yy >= height)
|
|
continue;
|
|
|
|
for (xx = x - 2; xx <= x + 2; xx++) {
|
|
if (xx < 0)
|
|
continue;
|
|
if (xx >= width)
|
|
continue;
|
|
|
|
neighbourhood[cnt++] = get_pixel8 (xx, yy, data, stride);
|
|
}
|
|
}
|
|
|
|
return median (neighbourhood, cnt);
|
|
}
|
|
|
|
static cairo_bool_t
|
|
compare_images (cairo_surface_t *a,
|
|
cairo_surface_t *b)
|
|
{
|
|
int width, height, stride;
|
|
const uint8_t *aa, *bb;
|
|
int x, y;
|
|
|
|
if (cairo_surface_status (a) || cairo_surface_status (b))
|
|
return FALSE;
|
|
|
|
if (cairo_surface_get_type (a) != cairo_surface_get_type (b))
|
|
return FALSE;
|
|
|
|
if (cairo_image_surface_get_format (a) != cairo_image_surface_get_format (b))
|
|
return FALSE;
|
|
|
|
if (cairo_image_surface_get_width (a) != cairo_image_surface_get_width (b))
|
|
return FALSE;
|
|
|
|
if (cairo_image_surface_get_height (a) != cairo_image_surface_get_height (b))
|
|
return FALSE;
|
|
|
|
if (cairo_image_surface_get_stride (a) != cairo_image_surface_get_stride (b))
|
|
return FALSE;
|
|
|
|
|
|
width = cairo_image_surface_get_width (a);
|
|
height = cairo_image_surface_get_height (a);
|
|
stride = cairo_image_surface_get_stride (a);
|
|
|
|
aa = cairo_image_surface_get_data (a);
|
|
bb = cairo_image_surface_get_data (b);
|
|
switch (cairo_image_surface_get_format (a)) {
|
|
case CAIRO_FORMAT_ARGB32:
|
|
for (y = 0; y < height; y++) {
|
|
const uint32_t *ua = (uint32_t *) aa;
|
|
const uint32_t *ub = (uint32_t *) bb;
|
|
for (x = 0; x < width; x++) {
|
|
if (ua[x] != ub[x]) {
|
|
int channel;
|
|
|
|
for (channel = 0; channel < 4; channel++) {
|
|
unsigned va, vb, diff;
|
|
|
|
va = (ua[x] >> (channel*8)) & 0xff;
|
|
vb = (ub[x] >> (channel*8)) & 0xff;
|
|
diff = abs (va - vb);
|
|
if (diff > 1) {
|
|
va = get_median_32 (x, y, channel, aa, width, height, stride);
|
|
vb = get_median_32 (x, y, channel, bb, width, height, stride);
|
|
diff = abs (va - vb);
|
|
if (diff > 1)
|
|
return FALSE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
aa += stride;
|
|
bb += stride;
|
|
}
|
|
break;
|
|
|
|
case CAIRO_FORMAT_RGB24:
|
|
for (y = 0; y < height; y++) {
|
|
const uint32_t *ua = (uint32_t *) aa;
|
|
const uint32_t *ub = (uint32_t *) bb;
|
|
for (x = 0; x < width; x++) {
|
|
if ((ua[x] & 0x00ffffff) != (ub[x] & 0x00ffffff)) {
|
|
int channel;
|
|
|
|
for (channel = 0; channel < 3; channel++) {
|
|
unsigned va, vb, diff;
|
|
|
|
va = (ua[x] >> (channel*8)) & 0xff;
|
|
vb = (ub[x] >> (channel*8)) & 0xff;
|
|
diff = abs (va - vb);
|
|
if (diff > 1) {
|
|
va = get_median_32 (x, y, channel, aa, width, height, stride);
|
|
vb = get_median_32 (x, y, channel, bb, width, height, stride);
|
|
diff = abs (va - vb);
|
|
if (diff > 1)
|
|
return FALSE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
aa += stride;
|
|
bb += stride;
|
|
}
|
|
break;
|
|
|
|
case CAIRO_FORMAT_A8:
|
|
for (y = 0; y < height; y++) {
|
|
for (x = 0; x < width; x++) {
|
|
if (aa[x] != bb[x]) {
|
|
unsigned diff = abs (aa[x] - bb[x]);
|
|
if (diff > 1) {
|
|
uint8_t va, vb;
|
|
|
|
va = get_median_8 (x, y, aa, width, height, stride);
|
|
vb = get_median_8 (x, y, bb, width, height, stride);
|
|
diff = abs (va - vb);
|
|
if (diff > 1)
|
|
return FALSE;
|
|
}
|
|
|
|
}
|
|
}
|
|
aa += stride;
|
|
bb += stride;
|
|
}
|
|
break;
|
|
|
|
case CAIRO_FORMAT_A1:
|
|
width /= 8;
|
|
for (y = 0; y < height; y++) {
|
|
if (memcmp (aa, bb, width))
|
|
return FALSE;
|
|
aa += stride;
|
|
bb += stride;
|
|
}
|
|
break;
|
|
|
|
case CAIRO_FORMAT_INVALID:
|
|
case CAIRO_FORMAT_RGB16_565: /* XXX */
|
|
break;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static int
|
|
check_images (struct clients *clients)
|
|
{
|
|
int i, j;
|
|
|
|
for (i = 0; i < clients->count; i++) {
|
|
struct client_info *c = &clients->clients[i];
|
|
|
|
if (c->reference == NULL)
|
|
continue;
|
|
|
|
for (j = 0; j < clients->count; j++) {
|
|
struct client_info *ref = &clients->clients[j];
|
|
|
|
if (strcmp (c->reference, ref->name))
|
|
continue;
|
|
|
|
if (! compare_images (c->image, ref->image))
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static gchar *
|
|
checksum (const char *filename)
|
|
{
|
|
gchar *str = NULL;
|
|
gchar *data;
|
|
gsize len;
|
|
|
|
if (g_file_get_contents (filename, &data, &len, NULL)) {
|
|
str = g_compute_checksum_for_data (G_CHECKSUM_SHA1, (guchar *) data, len);
|
|
g_free (data);
|
|
}
|
|
|
|
return str;
|
|
}
|
|
|
|
static void
|
|
write_trace (struct clients *clients)
|
|
{
|
|
cairo_device_t *ctx;
|
|
gchar *csum;
|
|
char buf[4096];
|
|
int i;
|
|
|
|
mkdir ("output", 0777);
|
|
|
|
ctx = cairo_script_create ("output/cairo-sphinx.trace");
|
|
cairo_script_from_recording_surface (ctx, clients->recording);
|
|
cairo_device_destroy (ctx);
|
|
|
|
csum = checksum ("output/cairo-sphinx.trace");
|
|
|
|
sprintf (buf, "output/%s.trace", csum);
|
|
if (! g_file_test (buf, G_FILE_TEST_EXISTS)) {
|
|
rename ("output/cairo-sphinx.trace", buf);
|
|
|
|
sprintf (buf, "output/%s.recording.png", csum);
|
|
cairo_surface_write_to_png (clients->recording, buf);
|
|
|
|
for (i = 0; i < clients->count; i++) {
|
|
struct client_info *c = &clients->clients[i];
|
|
if (c->image != NULL) {
|
|
sprintf (buf, "output/%s.%s.png", csum, c->name);
|
|
cairo_surface_write_to_png (c->image, buf);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
clients_complete (struct clients *clients, int fd)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < clients->count; i++) {
|
|
if (clients->clients[i].sk == fd) {
|
|
break;
|
|
}
|
|
}
|
|
if (i == clients->count)
|
|
return;
|
|
|
|
if (++clients->complete != clients->count)
|
|
return;
|
|
|
|
clients->offset = 0;
|
|
clients->complete = 0;
|
|
|
|
if (! check_images (clients))
|
|
write_trace (clients);
|
|
|
|
/* ack */
|
|
for (i = 0; i < clients->count; i++) {
|
|
struct client_info *c = &clients->clients[i];
|
|
|
|
cairo_surface_destroy (c->image);
|
|
c->image = NULL;
|
|
|
|
if (! writen (c->sk, &clients->serial, sizeof (clients->serial)))
|
|
continue;
|
|
|
|
c->image_serial = 0;
|
|
}
|
|
|
|
clients->recording = NULL;
|
|
clients->serial = 0;
|
|
}
|
|
|
|
static void
|
|
clients_recording (struct clients *clients, int fd, char *info)
|
|
{
|
|
sscanf (info, "%p %lu", &clients->recording, &clients->serial);
|
|
clients_complete (clients, fd);
|
|
}
|
|
|
|
static void
|
|
clients_remove (struct clients *clients, int fd)
|
|
{
|
|
int i, j;
|
|
|
|
for (i = 0; i < clients->count; i++) {
|
|
struct client_info *c = &clients->clients[i];
|
|
if (c->sk == fd) {
|
|
free (c->out_buf);
|
|
break;
|
|
}
|
|
}
|
|
|
|
for (j = i++; i < clients->count; i++)
|
|
clients->clients[j] = clients->clients[i];
|
|
|
|
clients->count = j;
|
|
}
|
|
|
|
static void
|
|
clients_send_trace (struct clients *clients,
|
|
const char * const line, const int len)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < clients->count; i++) {
|
|
struct client_info *c = &clients->clients[i];
|
|
int ret, rem = len;
|
|
|
|
if (c->trace == -1)
|
|
continue;
|
|
|
|
if (c->out_len) {
|
|
ret = write (c->trace, c->out_buf, c->out_len);
|
|
if (ret > 0) {
|
|
c->out_len -= ret;
|
|
if (c->out_len)
|
|
memmove (c->out_buf, c->out_buf + ret, c->out_len);
|
|
}
|
|
}
|
|
|
|
if (! c->out_len) {
|
|
ret = write (c->trace, line, rem);
|
|
if (ret > 0)
|
|
rem -= ret;
|
|
}
|
|
|
|
if (rem) {
|
|
if (c->out_len + rem > c->out_size) {
|
|
c->out_size *= 2;
|
|
c->out_buf = xrealloc (c->out_buf, c->out_size);
|
|
}
|
|
|
|
memcpy (c->out_buf + c->out_len, line, rem);
|
|
c->out_len += rem;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
clients_fini (struct clients *clients)
|
|
{
|
|
shm_unlink (clients->shm_path);
|
|
munmap (clients->base, DATA_SIZE);
|
|
free (clients->clients);
|
|
}
|
|
|
|
static int
|
|
nonblocking (int fd)
|
|
{
|
|
long flags;
|
|
|
|
flags = fcntl (fd, F_GETFL);
|
|
if (flags == -1)
|
|
return -1;
|
|
|
|
return fcntl (fd, F_SETFL, flags | O_NONBLOCK);
|
|
}
|
|
|
|
static void *
|
|
request_image (struct client *c,
|
|
struct context_closure *closure,
|
|
cairo_format_t format,
|
|
int width, int height, int stride)
|
|
{
|
|
char buf[1024];
|
|
unsigned long offset = -1;
|
|
int len;
|
|
|
|
assert (format != CAIRO_FORMAT_INVALID);
|
|
|
|
len = sprintf (buf, ".image %lu %d %d %d %d\n",
|
|
closure->id, format, width, height, stride);
|
|
writen (c->sk, buf, len);
|
|
|
|
readn (c->sk, &offset, sizeof (offset));
|
|
if (offset == (unsigned long) -1)
|
|
return NULL;
|
|
|
|
return (uint8_t *) c->base + offset;
|
|
}
|
|
|
|
static cairo_format_t
|
|
format_for_content (cairo_content_t content)
|
|
{
|
|
switch (content) {
|
|
case CAIRO_CONTENT_ALPHA:
|
|
return CAIRO_FORMAT_A8;
|
|
case CAIRO_CONTENT_COLOR:
|
|
return CAIRO_FORMAT_RGB24;
|
|
default:
|
|
case CAIRO_CONTENT_COLOR_ALPHA:
|
|
return CAIRO_FORMAT_ARGB32;
|
|
}
|
|
}
|
|
|
|
static void
|
|
get_surface_size (cairo_surface_t *surface,
|
|
int *width, int *height,
|
|
cairo_format_t *format)
|
|
{
|
|
if (cairo_surface_get_type (surface) == CAIRO_SURFACE_TYPE_IMAGE) {
|
|
*width = cairo_image_surface_get_width (surface);
|
|
*height = cairo_image_surface_get_height (surface);
|
|
*format = cairo_image_surface_get_format (surface);
|
|
} else {
|
|
struct surface_tag *tag;
|
|
|
|
tag = cairo_surface_get_user_data (surface, &surface_tag);
|
|
if (tag != NULL) {
|
|
*width = tag->width;
|
|
*height = tag->height;
|
|
} else {
|
|
double x0, x1, y0, y1;
|
|
cairo_t *cr;
|
|
|
|
/* presumably created using cairo_surface_create_similar() */
|
|
cr = cairo_create (surface);
|
|
cairo_clip_extents (cr, &x0, &y0, &x1, &y1);
|
|
cairo_destroy (cr);
|
|
|
|
tag = xmalloc (sizeof (*tag));
|
|
*width = tag->width = ceil (x1 - x0);
|
|
*height = tag->height = ceil (y1 - y0);
|
|
|
|
if (cairo_surface_set_user_data (surface, &surface_tag, tag, free))
|
|
exit (-1);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
send_surface (struct client *c,
|
|
struct context_closure *closure)
|
|
{
|
|
cairo_surface_t *source = closure->surface;
|
|
cairo_surface_t *image;
|
|
cairo_format_t format = CAIRO_FORMAT_INVALID;
|
|
cairo_t *cr;
|
|
int width, height, stride;
|
|
void *data;
|
|
unsigned long serial;
|
|
|
|
get_surface_size (source, &width, &height, &format);
|
|
if (format == CAIRO_FORMAT_INVALID)
|
|
format = format_for_content (cairo_surface_get_content (source));
|
|
|
|
stride = cairo_format_stride_for_width (format, width);
|
|
|
|
data = request_image (c, closure, format, width, height, stride);
|
|
if (data == NULL)
|
|
exit (-1);
|
|
|
|
image = cairo_image_surface_create_for_data (data,
|
|
format,
|
|
width, height,
|
|
stride);
|
|
cr = cairo_create (image);
|
|
cairo_surface_destroy (image);
|
|
|
|
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
|
|
cairo_set_source_surface (cr, source, 0, 0);
|
|
cairo_paint (cr);
|
|
cairo_destroy (cr);
|
|
|
|
/* signal completion */
|
|
writen (c->sk, ".complete\n", strlen (".complete\n"));
|
|
|
|
/* wait for image check */
|
|
serial = 0;
|
|
readn (c->sk, &serial, sizeof (serial));
|
|
if (serial != closure->id)
|
|
exit (-1);
|
|
}
|
|
|
|
static void
|
|
send_recording (struct client *c,
|
|
struct context_closure *closure)
|
|
{
|
|
cairo_surface_t *source = closure->surface;
|
|
char buf[1024];
|
|
int len;
|
|
unsigned long serial;
|
|
|
|
assert (cairo_surface_get_type (source) == CAIRO_SURFACE_TYPE_RECORDING);
|
|
len = sprintf (buf, ".recording %p %lu\n", source, closure->id);
|
|
writen (c->sk, buf, len);
|
|
|
|
/* wait for image check */
|
|
|
|
serial = 0;
|
|
readn (c->sk, &serial, sizeof (serial));
|
|
if (serial != closure->id)
|
|
exit (-1);
|
|
}
|
|
|
|
static cairo_surface_t *
|
|
_surface_create (void *closure,
|
|
cairo_content_t content,
|
|
double width, double height,
|
|
long uid)
|
|
{
|
|
struct client *c = closure;
|
|
cairo_surface_t *surface;
|
|
|
|
surface = cairo_surface_create_similar (c->surface,
|
|
content, width, height);
|
|
if (cairo_surface_get_type (surface) != CAIRO_SURFACE_TYPE_IMAGE) {
|
|
struct surface_tag *tag;
|
|
|
|
tag = xmalloc (sizeof (*tag));
|
|
tag->width = width;
|
|
tag->height = height;
|
|
if (cairo_surface_set_user_data (surface, &surface_tag, tag, free))
|
|
exit (-1);
|
|
}
|
|
|
|
return surface;
|
|
}
|
|
|
|
static cairo_t *
|
|
_context_create (void *closure, cairo_surface_t *surface)
|
|
{
|
|
struct client *c = closure;
|
|
struct context_closure *l;
|
|
cairo_bool_t foreign = FALSE;
|
|
|
|
l = xmalloc (sizeof (*l));
|
|
l->next = c->contexts;
|
|
l->surface = surface;
|
|
l->original = cairo_surface_reference (surface);
|
|
l->id = ++c->context_id;
|
|
if (l->id == 0)
|
|
l->id = ++c->context_id;
|
|
c->contexts = l;
|
|
|
|
/* record everything, including writes to images */
|
|
if (c->target == NULL) {
|
|
if (cairo_surface_get_type (surface) != CAIRO_SURFACE_TYPE_RECORDING) {
|
|
cairo_format_t format;
|
|
int width, height;
|
|
|
|
get_surface_size (surface, &width, &height, &format);
|
|
l->surface = cairo_surface_create_similar (c->surface,
|
|
cairo_surface_get_content (surface),
|
|
width, height);
|
|
foreign = TRUE;
|
|
}
|
|
}
|
|
|
|
l->context = cairo_create (l->surface);
|
|
if (foreign) {
|
|
cairo_set_source_surface (l->context, surface, 0, 0);
|
|
cairo_paint (l->context);
|
|
}
|
|
|
|
return l->context;
|
|
}
|
|
|
|
static void
|
|
_context_destroy (void *closure, void *ptr)
|
|
{
|
|
struct client *c = closure;
|
|
struct context_closure *l, **prev = &c->contexts;
|
|
|
|
while ((l = *prev) != NULL) {
|
|
if (l->context == ptr) {
|
|
if (cairo_surface_status (l->surface) == CAIRO_STATUS_SUCCESS) {
|
|
if (c->target == NULL)
|
|
send_recording (c, l);
|
|
else
|
|
send_surface (c, l);
|
|
} else {
|
|
exit (-1);
|
|
}
|
|
|
|
cairo_surface_destroy (l->original);
|
|
*prev = l->next;
|
|
free (l);
|
|
return;
|
|
}
|
|
prev = &l->next;
|
|
}
|
|
}
|
|
|
|
static void *
|
|
recorder (void *arg)
|
|
{
|
|
struct client client;
|
|
const cairo_script_interpreter_hooks_t hooks = {
|
|
.closure = &client,
|
|
.surface_create = _surface_create,
|
|
.context_create = _context_create,
|
|
.context_destroy = _context_destroy,
|
|
};
|
|
char *buf;
|
|
int buf_size;
|
|
int len = 0, ret;
|
|
struct pollfd pfd;
|
|
|
|
client.target = NULL;
|
|
client.sk = client_socket ("/tmp/cairo-sphinx");
|
|
if (client.sk < 0)
|
|
return NULL;
|
|
|
|
buf_size = 65536;
|
|
buf = xmalloc (buf_size);
|
|
|
|
len = sprintf (buf, "client-command target=recording name=.recorder\n");
|
|
if (! writen (client.sk, buf, len))
|
|
return NULL;
|
|
|
|
/* drain the shm_path */
|
|
len = readline (client.sk, buf, buf_size);
|
|
|
|
pfd.fd = client_socket ("/tmp/cairo-sphinx");
|
|
if (pfd.fd < 0)
|
|
return NULL;
|
|
|
|
len = sprintf (buf, "client-trace name=.recorder\n");
|
|
if (! writen (pfd.fd, buf, len))
|
|
return NULL;
|
|
|
|
client.surface = cairo_recording_surface_create (CAIRO_CONTENT_COLOR_ALPHA,
|
|
NULL);
|
|
|
|
client.context_id = 0;
|
|
client.csi = cairo_script_interpreter_create ();
|
|
cairo_script_interpreter_install_hooks (client.csi, &hooks);
|
|
|
|
nonblocking (pfd.fd);
|
|
pfd.events = POLLIN;
|
|
len = 0;
|
|
while (poll (&pfd, 1, -1) > 0) {
|
|
while ((ret = read (pfd.fd, buf + len, buf_size - len)) > 0) {
|
|
int end;
|
|
|
|
if (ret == buf_size - len) {
|
|
buf_size *= 2;
|
|
buf = xrealloc (buf, buf_size);
|
|
}
|
|
len += ret;
|
|
|
|
for (end = len; end > 0 && buf[--end] != '\n'; )
|
|
;
|
|
if (end > 0) {
|
|
buf[end] = '\0';
|
|
cairo_script_interpreter_feed_string (client.csi, buf, end);
|
|
|
|
len -= end + 1;
|
|
if (len)
|
|
memmove (buf, buf + end + 1, len);
|
|
}
|
|
}
|
|
if (ret == 0)
|
|
break;
|
|
if (! (errno == EAGAIN || errno == EINTR))
|
|
break;
|
|
}
|
|
|
|
cairo_script_interpreter_finish (client.csi);
|
|
cairo_script_interpreter_destroy (client.csi);
|
|
|
|
cairo_surface_destroy (client.surface);
|
|
return NULL;
|
|
}
|
|
|
|
static int
|
|
do_server (const char *path)
|
|
{
|
|
pthread_t thread;
|
|
struct clients clients;
|
|
char line[4096];
|
|
struct pollfd *pfd;
|
|
int num_pfd, size_pfd;
|
|
int n, cnt, ret = 1;
|
|
int sk, source = -1;
|
|
int waiter = -1, waiter_count = 0;
|
|
int len;
|
|
|
|
signal (SIGPIPE, SIG_IGN);
|
|
|
|
if (clients_init (&clients) < 0) {
|
|
fprintf (stderr, "Failed to initialise clients structure\n");
|
|
return -1;
|
|
}
|
|
|
|
sk = server_socket (path);
|
|
if (sk < 0) {
|
|
fprintf (stderr, "Failed to create server socket\n");
|
|
return 1;
|
|
}
|
|
|
|
if (daemonize () < 0)
|
|
return 1;
|
|
|
|
if (pthread_create (&thread, NULL, recorder, NULL) < 0) {
|
|
fprintf (stderr, "Failed to create spawn recording thread\n");
|
|
return 1;
|
|
}
|
|
|
|
size_pfd = 4;
|
|
pfd = xmalloc (sizeof (*pfd) * size_pfd);
|
|
pfd[0].fd = sk;
|
|
pfd[0].events = POLLIN;
|
|
num_pfd = 1;
|
|
|
|
while ((cnt = poll (pfd, num_pfd, -1)) > 0) {
|
|
int have_source;
|
|
|
|
if (pfd[0].revents) {
|
|
while ((sk = accept (pfd[0].fd, NULL, NULL)) != -1) {
|
|
len = readline (sk, line, sizeof (line));
|
|
if (strcmp (line, "source") == 0) {
|
|
|
|
if (source != -1)
|
|
exit (1);
|
|
|
|
source = sk;
|
|
if (nonblocking (sk) < 0) {
|
|
close (sk);
|
|
continue;
|
|
}
|
|
} else if (strncmp (line, "client-command", 14) == 0) {
|
|
if (source == -1)
|
|
clients_add_command (&clients, sk, line);
|
|
} else if (strncmp (line, "client-trace", 12) == 0) {
|
|
if (source == -1) {
|
|
clients_add_trace (&clients, sk, line);
|
|
if (nonblocking (sk) < 0) {
|
|
close (sk);
|
|
continue;
|
|
}
|
|
|
|
if (clients.count == waiter_count) {
|
|
for (n = 1; n < num_pfd; n++) {
|
|
if (pfd[n].fd == waiter) {
|
|
pfd[n].fd = -1;
|
|
break;
|
|
}
|
|
}
|
|
close (waiter);
|
|
waiter_count = -1;
|
|
}
|
|
}
|
|
} else if (strncmp (line, "wait", 4) == 0) {
|
|
int count = atoi (line + 5) + 1;
|
|
if (clients.count == count) {
|
|
close (sk);
|
|
continue;
|
|
} else {
|
|
waiter = sk;
|
|
waiter_count = count;
|
|
}
|
|
}
|
|
|
|
if (num_pfd == size_pfd) {
|
|
size_pfd *= 2;
|
|
pfd = xrealloc (pfd, sizeof (*pfd) * size_pfd);
|
|
}
|
|
|
|
pfd[num_pfd].fd = sk;
|
|
pfd[num_pfd].events = POLLIN;
|
|
pfd[num_pfd].revents = 0;
|
|
num_pfd++;
|
|
}
|
|
cnt--;
|
|
}
|
|
|
|
have_source = 0;
|
|
for (n = 1; cnt && n < num_pfd; n++) {
|
|
if (! pfd[n].revents)
|
|
continue;
|
|
cnt--;
|
|
|
|
if (pfd[n].fd == -1)
|
|
continue;
|
|
|
|
if (source == pfd[n].fd) {
|
|
have_source = n;
|
|
} else {
|
|
len = readline (pfd[n].fd, line, sizeof (line));
|
|
if (len < 0) {
|
|
clients_remove (&clients, pfd[n].fd);
|
|
close (pfd[n].fd);
|
|
pfd[n].fd = -1;
|
|
continue;
|
|
}
|
|
|
|
if (strncmp (line, ".image", 6) == 0) {
|
|
if (! clients_image (&clients, pfd[n].fd, line + 7)) {
|
|
clients_remove (&clients, pfd[n].fd);
|
|
close (pfd[n].fd);
|
|
pfd[n].fd = -1;
|
|
continue;
|
|
}
|
|
} else if (strncmp (line, ".complete", 9) == 0) {
|
|
clients_complete (&clients, pfd[n].fd);
|
|
} else if (strncmp (line, ".recording", 10) == 0) {
|
|
clients_recording (&clients, pfd[n].fd, line + 6);
|
|
} else {
|
|
printf ("do_command (%s)\n", line);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (have_source) {
|
|
do {
|
|
len = read (source, line, sizeof (line));
|
|
if (len > 0) {
|
|
clients_send_trace (&clients, line, len);
|
|
} else if (len == 0) {
|
|
close (source);
|
|
pfd[have_source].fd = source = -1;
|
|
goto done;
|
|
} else
|
|
break;
|
|
} while (1);
|
|
}
|
|
|
|
for (n = cnt = 1; n < num_pfd; n++) {
|
|
if (pfd[n].fd != -1) {
|
|
if (cnt != n)
|
|
pfd[cnt] = pfd[n];
|
|
cnt++;
|
|
}
|
|
}
|
|
num_pfd = cnt;
|
|
}
|
|
|
|
done:
|
|
ret = 0;
|
|
for (n = 0; n < num_pfd; n++) {
|
|
if (pfd[n].fd != -1)
|
|
close (pfd[n].fd);
|
|
}
|
|
free (pfd);
|
|
clients_fini (&clients);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void *
|
|
client_shm (const char *shm_path)
|
|
{
|
|
void *base;
|
|
int fd;
|
|
|
|
fd = shm_open (shm_path, O_RDWR, 0);
|
|
if (fd == -1)
|
|
return MAP_FAILED;
|
|
|
|
base = mmap (NULL, DATA_SIZE,
|
|
PROT_READ | PROT_WRITE,
|
|
MAP_SHARED | MAP_NORESERVE,
|
|
fd, 0);
|
|
close (fd);
|
|
|
|
return base;
|
|
}
|
|
|
|
static int
|
|
client_socket (const char *socket_path)
|
|
{
|
|
struct sockaddr_un addr;
|
|
int sk;
|
|
|
|
sk = socket (PF_UNIX, SOCK_STREAM, 0);
|
|
if (sk == -1)
|
|
return -1;
|
|
|
|
memset (&addr, 0, sizeof (addr));
|
|
addr.sun_family = AF_UNIX;
|
|
strcpy (addr.sun_path, socket_path);
|
|
|
|
if (connect (sk, (struct sockaddr *) &addr, sizeof (addr)) == -1)
|
|
return -1;
|
|
|
|
return sk;
|
|
}
|
|
|
|
static int
|
|
do_client (int fd,
|
|
const char *target,
|
|
const char *name,
|
|
const char *reference,
|
|
cairo_content_t content)
|
|
{
|
|
struct client client;
|
|
const cairo_script_interpreter_hooks_t hooks = {
|
|
.closure = &client,
|
|
.surface_create = _surface_create,
|
|
.context_create = _context_create,
|
|
.context_destroy = _context_destroy,
|
|
};
|
|
void *closure;
|
|
char *buf;
|
|
int buf_size;
|
|
int len = 0, ret;
|
|
struct pollfd pfd;
|
|
|
|
client.sk = fd;
|
|
client.target = cairo_boilerplate_get_target_by_name (target, content);
|
|
client.context_id = 0;
|
|
|
|
client.surface = client.target->create_surface (NULL, content, 1, 1, 1, 1,
|
|
CAIRO_BOILERPLATE_MODE_TEST,
|
|
&closure);
|
|
if (client.surface == NULL) {
|
|
fprintf (stderr, "Failed to create target surface: %s.\n",
|
|
client.target->name);
|
|
return 1;
|
|
}
|
|
|
|
buf_size = 65536;
|
|
buf = xmalloc (buf_size);
|
|
|
|
if (reference != NULL) {
|
|
len = sprintf (buf,
|
|
"client-command name=%s target=%s reference=%s\n",
|
|
name, target, reference);
|
|
} else {
|
|
len = sprintf (buf,
|
|
"client-command name=%s target=%s\n",
|
|
name, target);
|
|
}
|
|
if (! writen (fd, buf, len))
|
|
return 1;
|
|
|
|
len = readline (fd, buf, buf_size);
|
|
client.base = client_shm (buf);
|
|
if (client.base == MAP_FAILED) {
|
|
fprintf (stderr, "Failed to map shared memory segment '%s'.\n", buf);
|
|
return 1;
|
|
}
|
|
|
|
if (daemonize () < 0)
|
|
return 1;
|
|
|
|
pfd.fd = client_socket ("/tmp/cairo-sphinx");
|
|
if (pfd.fd < 0)
|
|
return 1;
|
|
|
|
len = sprintf (buf, "client-trace name=%s\n", name);
|
|
if (! writen (pfd.fd, buf, len))
|
|
return 1;
|
|
|
|
client.csi = cairo_script_interpreter_create ();
|
|
cairo_script_interpreter_install_hooks (client.csi, &hooks);
|
|
|
|
nonblocking (pfd.fd);
|
|
pfd.events = POLLIN;
|
|
len = 0;
|
|
while (poll (&pfd, 1, -1) > 0) {
|
|
while ((ret = read (pfd.fd, buf + len, buf_size - len)) > 0) {
|
|
int end;
|
|
|
|
if (ret == buf_size - len) {
|
|
buf_size *= 2;
|
|
buf = xrealloc (buf, buf_size);
|
|
}
|
|
len += ret;
|
|
|
|
for (end = len; end > 0 && buf[--end] != '\n'; )
|
|
;
|
|
if (end > 0) {
|
|
buf[end] = '\0';
|
|
cairo_script_interpreter_feed_string (client.csi, buf, end);
|
|
|
|
len -= end + 1;
|
|
if (len)
|
|
memmove (buf, buf + end + 1, len);
|
|
}
|
|
}
|
|
if (ret == 0)
|
|
break;
|
|
if (! (errno == EAGAIN || errno == EINTR))
|
|
break;
|
|
}
|
|
|
|
cairo_script_interpreter_finish (client.csi);
|
|
cairo_script_interpreter_destroy (client.csi);
|
|
|
|
cairo_surface_destroy (client.surface);
|
|
close (fd);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
do_exec (int fd, char **argv)
|
|
{
|
|
char buf[4096];
|
|
|
|
if (*argv == NULL)
|
|
return 0;
|
|
|
|
snprintf (buf, sizeof (buf), "%s/cairo-trace.so", LIBDIR);
|
|
setenv ("LD_PRELOAD", buf, 1);
|
|
|
|
snprintf (buf, sizeof (buf), "0");
|
|
setenv ("CAIRO_TRACE_LINE_INFO", buf, 1);
|
|
|
|
snprintf (buf, sizeof (buf), "%d", fd);
|
|
setenv ("CAIRO_TRACE_FD", buf, 1);
|
|
putenv (buf);
|
|
|
|
return execvp (argv[0], argv);
|
|
}
|
|
|
|
static int
|
|
do_wait (int fd)
|
|
{
|
|
char buf;
|
|
int ret = read (fd, &buf, 1);
|
|
return ret != 0;
|
|
}
|
|
|
|
int
|
|
main (int argc, char **argv)
|
|
{
|
|
char buf[4096];
|
|
int len;
|
|
int fd;
|
|
|
|
if (argc == 1)
|
|
return do_server ("/tmp/cairo-sphinx");
|
|
|
|
fd = client_socket ("/tmp/cairo-sphinx");
|
|
if (fd < 0)
|
|
return 1;
|
|
|
|
if (strcmp (argv[1], "client") == 0) {
|
|
return do_client (fd, argv[2], argv[3], argv[4],
|
|
CAIRO_CONTENT_COLOR_ALPHA);
|
|
}
|
|
|
|
if (strcmp (argv[1], "wait") == 0) {
|
|
len = snprintf (buf, sizeof (buf), "wait %s\n", argv[2]);
|
|
if (! writen (fd, buf, len))
|
|
return 1;
|
|
|
|
return do_wait (fd);
|
|
}
|
|
|
|
if (strcmp (argv[1], "exec") == 0) {
|
|
len = snprintf (buf, sizeof (buf), "source\n");
|
|
if (! writen (fd, buf, len))
|
|
return 1;
|
|
|
|
return do_exec (fd, argv+2);
|
|
}
|
|
|
|
if (strcmp (argv[1], "replay") == 0) {
|
|
len = snprintf (buf, sizeof (buf), "replay %s\n", argv[2]);
|
|
return ! writen (fd, buf, len);
|
|
}
|
|
|
|
return 0;
|
|
}
|