X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=fd.c;h=48e2faf97c6d3e2bcb1616ebef04db48e2003d9e;hp=abad80a86ce368660c1ed3b88a1c0e088488a422;hb=d2a600590a2607d2bd729f3079aaec320efe7990;hpb=2fe2b6e212e8e0d09cd1a8fc95f7f2f3a1110485

diff --git a/fd.c b/fd.c
index abad80a8..48e2faf9 100644
--- a/fd.c
+++ b/fd.c
@@ -15,6 +15,31 @@
 #include "para.h"
 #include "error.h"
 
+/*
+ * Write a buffer to a file descriptor, re-write on short writes.
+ *
+ * \param fd The file descriptor.
+ * \param buf The buffer to be sent.
+ * \param len The length of \a buf.
+ *
+ * \return Standard. In any case, the number of bytes that have been written is
+ * stored in \a len.
+ */
+int write_all(int fd, const char *buf, size_t *len)
+{
+	size_t total = *len;
+
+	assert(total);
+	*len = 0;
+	while (*len < total) {
+		int ret = write(fd, buf + *len, total - *len);
+		if (ret == -1)
+			return -ERRNO_TO_PARA_ERROR(errno);
+		*len += ret;
+	}
+	return 1;
+}
+
 /**
  * Check whether a file exists.
  *