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backend: use fcntl(F_DUPFD_CLOEXEC) instead of dup

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This makes sure the CLOEXEC flag is set on the dup'ed FD.
This commit is contained in:
Simon Ser 2020-12-15 20:52:53 +01:00
parent 1ca4d6b029
commit 87bd718de5
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GPG key ID: 0FDE7BE0E88F5E48
3 changed files with 16 additions and 13 deletions
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13
backend/headless/backend.c
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@ -1,6 +1,7 @@
#define _POSIX_C_SOURCE 200809L #define _POSIX_C_SOURCE 200809L
#include <assert.h> #include <assert.h>
#include <drm_fourcc.h> #include <drm_fourcc.h>
#include <fcntl.h>
#include <stdlib.h> #include <stdlib.h>
#include <unistd.h> #include <unistd.h>
#include <wlr/interfaces/wlr_input_device.h> #include <wlr/interfaces/wlr_input_device.h>
@ -113,19 +114,19 @@ static bool backend_init(struct wlr_headless_backend *backend,
backend->renderer = renderer; backend->renderer = renderer;
backend->egl = wlr_gles2_renderer_get_egl(renderer); backend->egl = wlr_gles2_renderer_get_egl(renderer);
int fd = wlr_renderer_get_drm_fd(renderer); int drm_fd = wlr_renderer_get_drm_fd(renderer);
if (fd < 0) { if (drm_fd < 0) {
wlr_log(WLR_ERROR, "Failed to get DRM device FD from renderer"); wlr_log(WLR_ERROR, "Failed to get DRM device FD from renderer");
return false; return false;
} }
fd = dup(fd); drm_fd = fcntl(drm_fd, F_DUPFD_CLOEXEC, 0);
if (fd < 0) { if (drm_fd < 0) {
wlr_log_errno(WLR_ERROR, "dup failed"); wlr_log_errno(WLR_ERROR, "fcntl(F_DUPFD_CLOEXEC) failed");
return false; return false;
} }
struct wlr_gbm_allocator *alloc = wlr_gbm_allocator_create(fd); struct wlr_gbm_allocator *alloc = wlr_gbm_allocator_create(drm_fd);
if (alloc == NULL) { if (alloc == NULL) {
wlr_log(WLR_ERROR, "Failed to create GBM allocator"); wlr_log(WLR_ERROR, "Failed to create GBM allocator");
return false; return false;

6
backend/wayland/backend.c
View file

@ -1,4 +1,6 @@
#define _POSIX_C_SOURCE 200809L
#include <assert.h> #include <assert.h>
#include <fcntl.h>
#include <limits.h> #include <limits.h>
#include <stdint.h> #include <stdint.h>
#include <stdlib.h> #include <stdlib.h>
@ -335,9 +337,9 @@ struct wlr_backend *wlr_wl_backend_create(struct wl_display *display,
goto error_event; goto error_event;
} }
drm_fd = dup(drm_fd); drm_fd = fcntl(drm_fd, F_DUPFD_CLOEXEC, 0);
if (drm_fd < 0) { if (drm_fd < 0) {
wlr_log_errno(WLR_ERROR, "dup failed"); wlr_log_errno(WLR_ERROR, "fcntl(F_DUPFD_CLOEXEC) failed");
goto error_event; goto error_event;
} }

10
backend/x11/backend.c
View file

@ -1,6 +1,6 @@
#define _POSIX_C_SOURCE 200112L #define _POSIX_C_SOURCE 200809L
#include <assert.h> #include <assert.h>
#include <fcntl.h>
#include <limits.h> #include <limits.h>
#include <stdbool.h> #include <stdbool.h>
#include <stdio.h> #include <stdio.h>
@ -490,9 +490,9 @@ struct wlr_backend *wlr_x11_backend_create(struct wl_display *display,
return false; return false;
} }
drm_fd = dup(drm_fd); drm_fd = fcntl(drm_fd, F_DUPFD_CLOEXEC, 0);
if (fd < 0) { if (drm_fd < 0) {
wlr_log_errno(WLR_ERROR, "dup failed"); wlr_log_errno(WLR_ERROR, "fcntl(F_DUPFD_CLOEXEC) failed");
return false; return false;
} }