Fix new glibc warnings about warn_unused_result.

[ccan] / ccan / read_write_all / read_write_all.c

diff --git a/ccan/read_write_all/read_write_all.c b/ccan/read_write_all/read_write_all.c
new file mode 100644 (file)
index 0000000..406bd45
--- /dev/null
+++ b/ccan/read_write_all/read_write_all.c
@@ -0,0 +1,38 @@
+#include "read_write_all.h"
+#include <unistd.h>
+#include <errno.h>
+
+bool write_all(int fd, const void *data, size_t size)
+{
+       while (size) {
+               ssize_t done;
+
+               done = write(fd, data, size);
+               if (done < 0 && errno == EINTR)
+                       continue;
+               if (done <= 0)
+                       return false;
+               data += done;
+               size -= done;
+       }
+
+       return true;
+}
+
+bool read_all(int fd, void *data, size_t size)
+{
+       while (size) {
+               ssize_t done;
+
+               done = read(fd, data, size);
+               if (done < 0 && errno == EINTR)
+                       continue;
+               if (done <= 0)
+                       return false;
+               data += done;
+               size -= done;
+       }
+
+       return true;
+}
+