util: introduce safe versions of read & write that handle interrupted

systems calls.

1 files changed, 10 insertions, 0 deletions

diff --git a/util.h b/util.h
index ca90494..ef67566 100644
--- a/util.h
+++ b/util.h
@@ -225,4 +225,14 @@ int bfs_major(dev_t dev);
  */
 int bfs_minor(dev_t dev);
 
+/**
+ * A safe version of read() that handles interrupted system calls.
+ */
+ssize_t safe_read(int fd, void *buf, size_t nbytes);
+
+/**
+ * A safe version of write() that handles interrupted system calls.
+ */
+ssize_t safe_write(int fd, const void *buf, size_t nbytes);
+
 #endif // BFS_UTIL_H