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Use _POSIX_C_SOURCE, use shm_open

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emersion 2018-11-05 22:51:23 +01:00
parent d7b010024a
commit 2d0c5ec78e
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18 changed files with 32 additions and 61 deletions
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31
examples/screencopy.c
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@ -21,8 +21,7 @@
* DEALINGS IN THE SOFTWARE.
*/
#define _XOPEN_SOURCE 700
#define _POSIX_C_SOURCE 199309L
#define _POSIX_C_SOURCE 200112L
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
@ -65,12 +64,17 @@ static const struct format formats[] = {
{WL_SHM_FORMAT_ABGR8888, false},
};
static int backingfile(off_t size) {
char template[] = "/tmp/wlroots-shared-XXXXXX";
int fd = mkstemp(template);
static struct wl_buffer *create_shm_buffer(enum wl_shm_format fmt,
int width, int height, int stride, void **data_out) {
int size = stride * height;
const char shm_name[] = "/wlroots-screencopy";
int fd = shm_open(shm_name, O_RDWR | O_CREAT | O_EXCL, 0);
if (fd < 0) {
return -1;
fprintf(stderr, "shm_open failed\n");
return NULL;
}
shm_unlink(shm_name);
int ret;
while ((ret = ftruncate(fd, size)) == EINTR) {
@ -78,20 +82,7 @@ static int backingfile(off_t size) {
}
if (ret < 0) {
close(fd);
return -1;
}
unlink(template);
return fd;
}
static struct wl_buffer *create_shm_buffer(enum wl_shm_format fmt,
int width, int height, int stride, void **data_out) {
int size = stride * height;
int fd = backingfile(size);
if (fd < 0) {
fprintf(stderr, "creating a buffer file for %d B failed: %m\n", size);
fprintf(stderr, "ftruncate failed\n");
return NULL;
}