1 files changed, 27 insertions, 0 deletions

diff --git a/nacl/curvecp/writeall.c b/nacl/curvecp/writeall.c
new file mode 100644
index 00000000..58f93011
--- /dev/null
+++ b/nacl/curvecp/writeall.c
@@ -0,0 +1,27 @@
+#include <poll.h>
+#include <unistd.h>
+#include "e.h"
+#include "writeall.h"
+
+int writeall(int fd,const void *x,long long xlen)
+{
+  long long w;
+  while (xlen > 0) {
+    w = xlen;
+    if (w > 1048576) w = 1048576;
+    w = write(fd,x,w);
+    if (w < 0) {
+      if (errno == EINTR || errno == EAGAIN || errno == EWOULDBLOCK) {
+        struct pollfd p;
+        p.fd = fd;
+        p.events = POLLOUT | POLLERR;
+        poll(&p,1,-1);
+        continue;
+      }
+      return -1;
+    }
+    x += w;
+    xlen -= w;
+  }
+  return 0;
+}