/*
- * 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.
*/
#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.
*
*
* \return Standard.
*/
-int mark_fd_blocking(int fd)
+__must_check int mark_fd_blocking(int fd)
{
int flags = fcntl(fd, F_GETFL);
if (flags < 0)
*
* \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)
}
/**
-* Paraslash's wrapper for fgets(3).
-
-* \param line Pointer to the buffer to store the line.
-* \param size The size of the buffer given by \a line.
-* \param f The stream to read from.
-*
-* \return Unlike the standard fgets() function, an integer value
-* is returned. On success, this function returns 1. On errors, -E_FGETS
-* is returned. A zero return value indicates an end of file condition.
-*/
+ * Paraslash's wrapper for fgets(3).
+ *
+ * \param line Pointer to the buffer to store the line.
+ * \param size The size of the buffer given by \a line.
+ * \param f The stream to read from.
+ *
+ * \return Unlike the standard fgets() function, an integer value
+ * is returned. On success, this function returns 1. On errors, -E_FGETS
+ * is returned. A zero return value indicates an end of file condition.
+ */
__must_check int para_fgets(char *line, int size, FILE *f)
{
again:
* 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).
*/
*/
int para_munmap(void *start, size_t length)
{
+ int err;
if (munmap(start, length) >= 0)
return 1;
+ err = errno;
PARA_ERROR_LOG("munmap (%p/%zu) failed: %s\n", start, length,
- strerror(errno));
- return -E_MUNMAP;
+ strerror(err));
+ return -ERRNO_TO_PARA_ERROR(err);
}
/**
- * check a file descriptor for writability
+ * Check a file descriptor for writability.
*
- * \param fd the file descriptor
+ * \param fd The file descriptor.
*
* \return positive if fd is ready for writing, zero if it isn't, negative if
* an error occurred.