X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=fd.c;h=48e2faf97c6d3e2bcb1616ebef04db48e2003d9e;hp=ecd87cdccb555bafea525c3a5ded0063f2b63438;hb=63b57e3e60923cea4e3e1808e3133789db2dc83a;hpb=c184f843500dd59baa95fbbbab962a1691bf0217

diff --git a/fd.c b/fd.c
index ecd87cdc..48e2faf9 100644
--- a/fd.c
+++ b/fd.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2006-2007 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2006-2008 Andre Noll <maan@systemlinux.org>
  *
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
@@ -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.
  *
@@ -60,6 +85,24 @@ int para_select(int n, fd_set *readfds, fd_set *writefds,
 	return ret;
 }
 
+/**
+ * Set a file descriptor to blocking mode.
+ *
+ * \param fd The file descriptor.
+ *
+ * \return Standard.
+ */
+__must_check int mark_fd_blocking(int fd)
+{
+	int flags = fcntl(fd, F_GETFL);
+	if (flags < 0)
+		return -ERRNO_TO_PARA_ERROR(errno);
+	flags = fcntl(fd, F_SETFL, ((long)flags) & ~O_NONBLOCK);
+	if (flags < 0)
+		return -ERRNO_TO_PARA_ERROR(errno);
+	return 1;
+}
+
 /**
  * Set a file descriptor to non-blocking mode.
  *
@@ -67,7 +110,7 @@ int para_select(int n, fd_set *readfds, fd_set *writefds,
  *
  * \return Standard.
  */
-int mark_fd_nonblock(int fd)
+__must_check int mark_fd_nonblocking(int fd)
 {
 	int flags = fcntl(fd, F_GETFL);
 	if (flags < 0)
@@ -293,8 +336,7 @@ int para_mkdir(const char *path, mode_t mode)
  * open call is closed after mmap().  Otherwise the file is kept open and the
  * file descriptor is returned in \a fd_ptr.
  *
- * \return Positive on success, negative on errors. Possible errors include: \p
- * E_FSTAT, any errors returned by para_open(), \p E_EMPTY, \p E_MMAP.
+ * \return Standard.
  *
  * \sa para_open(), mmap(2).
  */