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prevent shmget from allocating objects that overflow ptrdiff_t
[musl]
/
src
/
linux
/
eventfd.c
diff --git
a/src/linux/eventfd.c
b/src/linux/eventfd.c
index
cb39a7b
..
5306648
100644
(file)
--- a/
src/linux/eventfd.c
+++ b/
src/linux/eventfd.c
@@
-1,7
+1,18
@@
#include <sys/eventfd.h>
#include <sys/eventfd.h>
+#include <unistd.h>
#include "syscall.h"
int eventfd(unsigned int count, int flags)
{
return syscall(flags ? SYS_eventfd2 : SYS_eventfd, count, flags);
}
#include "syscall.h"
int eventfd(unsigned int count, int flags)
{
return syscall(flags ? SYS_eventfd2 : SYS_eventfd, count, flags);
}
+
+int eventfd_read(int fd, eventfd_t *value)
+{
+ return (sizeof(*value) == read(fd, value, sizeof(*value))) ? 0 : -1;
+}
+
+int eventfd_write(int fd, eventfd_t value)
+{
+ return (sizeof(value) == write(fd, &value, sizeof(value))) ? 0 : -1;
+}