cleanup src/linux and src/misc trees, etc.

previously, it was pretty much random which one of these trees a given
function appeared in. they have now been organized into:

src/linux: non-POSIX linux syscalls (possibly shard with other nixen)
src/legacy: various obsolete/legacy functions, mostly wrappers
src/misc: still mostly uncategorized; some misc POSIX, some nonstd
src/crypt: crypt hash functions

further cleanup will be done later.

1 files changed, 11 insertions, 0 deletions

diff --git a/src/linux/eventfd.c b/src/linux/eventfd.c
index cb39a7ba..53066487 100644
--- a/src/linux/eventfd.c
+++ b/src/linux/eventfd.c
@@ -1,7 +1,18 @@
 #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);
 }
+
+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;
+}