diff options
Diffstat (limited to 'backend')
| -rw-r--r-- | backend/meson.build | 1 | ||||
| -rw-r--r-- | backend/wayland/os-compatibility.c | 153 |
2 files changed, 0 insertions, 154 deletions
diff --git a/backend/meson.build b/backend/meson.build index 5ed7b227..c9d47317 100644 --- a/backend/meson.build +++ b/backend/meson.build @@ -21,7 +21,6 @@ backend_files = files( 'wayland/output.c', 'wayland/registry.c', 'wayland/wl_seat.c', - 'wayland/os-compatibility.c', 'x11/backend.c', ) diff --git a/backend/wayland/os-compatibility.c b/backend/wayland/os-compatibility.c deleted file mode 100644 index cbd7988d..00000000 --- a/backend/wayland/os-compatibility.c +++ /dev/null @@ -1,153 +0,0 @@ -/* - * Copyright © 2012 Collabora, Ltd. - * - * Permission is hereby granted, free of charge, to any person obtaining - * a copy of this software and associated documentation files (the - * "Software"), to deal in the Software without restriction, including - * without limitation the rights to use, copy, modify, merge, publish, - * distribute, sublicense, and/or sell copies of the Software, and to - * permit persons to whom the Software is furnished to do so, subject to - * the following conditions: - * - * The above copyright notice and this permission notice (including the - * next paragraph) shall be included in all copies or substantial - * portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, - * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF - * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND - * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS - * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN - * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -#define _XOPEN_SOURCE 700 -#include <sys/types.h> -#include <sys/socket.h> -#include <unistd.h> -#include <fcntl.h> -#include <errno.h> -#include <string.h> -#include <stdlib.h> - -int -os_fd_set_cloexec(int fd) -{ - long flags; - - if (fd == -1) - return -1; - - flags = fcntl(fd, F_GETFD); - if (flags == -1) - return -1; - - if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) == -1) - return -1; - - return 0; -} - -static int -set_cloexec_or_close(int fd) -{ - if (os_fd_set_cloexec(fd) != 0) { - close(fd); - return -1; - } - return fd; -} - -static int -create_tmpfile_cloexec(char *tmpname) -{ - int fd; - -#ifdef HAVE_MKOSTEMP - fd = mkostemp(tmpname, O_CLOEXEC); - if (fd >= 0) - unlink(tmpname); -#else - fd = mkstemp(tmpname); - if (fd >= 0) { - fd = set_cloexec_or_close(fd); - unlink(tmpname); - } -#endif - - return fd; -} - -/* - * Create a new, unique, anonymous file of the given size, and - * return the file descriptor for it. The file descriptor is set - * CLOEXEC. The file is immediately suitable for mmap()'ing - * the given size at offset zero. - * - * The file should not have a permanent backing store like a disk, - * but may have if XDG_RUNTIME_DIR is not properly implemented in OS. - * - * The file name is deleted from the file system. - * - * The file is suitable for buffer sharing between processes by - * transmitting the file descriptor over Unix sockets using the - * SCM_RIGHTS methods. - * - * If the C library implements posix_fallocate(), it is used to - * guarantee that disk space is available for the file at the - * given size. If disk space is insufficient, errno is set to ENOSPC. - * If posix_fallocate() is not supported, program may receive - * SIGBUS on accessing mmap()'ed file contents instead. - */ -int -os_create_anonymous_file(off_t size) -{ - static const char template[] = "/wlroots-shared-XXXXXX"; - const char *path; - char *name; - int fd; - int ret; - - path = getenv("XDG_RUNTIME_DIR"); - if (!path) { - errno = ENOENT; - return -1; - } - - name = malloc(strlen(path) + sizeof(template)); - if (!name) - return -1; - - strcpy(name, path); - strcat(name, template); - - fd = create_tmpfile_cloexec(name); - - free(name); - - if (fd < 0) - return -1; - -#ifdef HAVE_POSIX_FALLOCATE - do { - ret = posix_fallocate(fd, 0, size); - } while (ret == EINTR); - if (ret != 0) { - close(fd); - errno = ret; - return -1; - } -#else - do { - ret = ftruncate(fd, size); - } while (ret < 0 && errno == EINTR); - if (ret < 0) { - close(fd); - return -1; - } -#endif - - return fd; -} |