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client/pool-buffer: set CLOEXEC on buffer FD, just in case

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emersion 2018-05-25 19:39:17 +01:00
parent 2e6e7b7c1d
commit 8df2238956
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1 changed files with 29 additions and 10 deletions
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39
client/pool-buffer.c
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@ -1,37 +1,56 @@
#define _XOPEN_SOURCE 500
#include <assert.h>
#include <cairo/cairo.h>
#include <fcntl.h>
#include <pango/pangocairo.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <pango/pangocairo.h>
#include <unistd.h>
#include <wayland-client.h>
#include "config.h"
#include "pool-buffer.h"
static bool set_cloexec(int fd) {
long flags = fcntl(fd, F_GETFD);
if (flags == -1) {
return false;
}
if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) == -1) {
return false;
}
return true;
}
static int create_pool_file(size_t size, char **name) {
static const char template[] = "sway-client-XXXXXX";
const char *path = getenv("XDG_RUNTIME_DIR");
if (!path) {
if (path == NULL) {
fprintf(stderr, "XDG_RUNTIME_DIR is not set\n");
return -1;
}
int ts = (path[strlen(path) - 1] == '/');
*name = malloc(
strlen(template) +
strlen(path) +
(ts ? 0 : 1) + 1);
sprintf(*name, "%s%s%s", path, ts ? "" : "/", template);
size_t name_size = strlen(template) + 1 + strlen(path) + 1;
*name = malloc(name_size);
if (*name == NULL) {
fprintf(stderr, "allocation failed\n");
return -1;
}
snprintf(*name, name_size, "%s/%s", path, template);
int fd = mkstemp(*name);
if (fd < 0) {
return -1;
}
if (!set_cloexec(fd)) {
close(fd);
return -1;
}
if (ftruncate(fd, size) < 0) {
close(fd);
return -1;