Add para_readv(), a simple wrapper for readv().

This new function will be used by the dccp receiver in a subsequent patch.

diff --git a/fd.c b/fd.c
index 0fb796025945b2c33e59c6c8508d370626ac0c02..32d11079267abb8c53db0f2dea5756f77f24d6f5 100644 (file)
--- a/fd.c
+++ b/fd.c
@@ -81,6 +81,27 @@ int write_nonblock(int fd, const char *buf, size_t len,
        return written;
 }
 
+/**
+ * Simple wrapper for readv().
+ *
+ * \param fd The file descriptor to read from.
+ * \param iov Scatter/gather array used in readv().
+ * \param iovcnt Number of elements in \a iov.
+ *
+ * \return A negative error code on errors, the return value of the underlying
+ * call to readv() otherwise.
+ *
+ * \sa readv(2).
+ */
+int para_readv(int fd, struct iovec *iov, int iovcnt)
+{
+       int ret = readv(fd, iov, iovcnt);
+
+       if (ret < 0)
+               return -ERRNO_TO_PARA_ERROR(errno);
+       return ret;
+}
+
 /**
  * Check whether a file exists.
  *

diff --git a/fd.h b/fd.h
index a21cd9f2caeae59a8d2e12a294777f38c738d506..cd670d3350827d7687109f5b3045d9f55d7ed1bb 100644 (file)
--- a/fd.h
+++ b/fd.h
@@ -7,6 +7,7 @@
 /** \file fd.h exported symbols from fd.c */
 
 int write_all(int fd, const char *buf, size_t *len);
+int para_readv(int fd, struct iovec *iov, int iovcnt);
 int file_exists(const char *);
 int para_select(int n, fd_set *readfds, fd_set *writefds,
                struct timeval *timeout_tv);