39 lines
725 B
C
39 lines
725 B
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* Utility routines.
|
|
*
|
|
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
|
|
*
|
|
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include "libbb.h"
|
|
|
|
/*
|
|
* Write all of the supplied buffer out to a file.
|
|
* This does multiple writes as necessary.
|
|
* Returns the amount written, or -1 on an error.
|
|
*/
|
|
ssize_t bb_full_write(int fd, const void *buf, size_t len)
|
|
{
|
|
ssize_t cc;
|
|
ssize_t total;
|
|
|
|
total = 0;
|
|
|
|
while (len > 0) {
|
|
cc = safe_write(fd, buf, len);
|
|
|
|
if (cc < 0)
|
|
return cc; /* write() returns -1 on failure. */
|
|
|
|
total += cc;
|
|
buf = ((const char *)buf) + cc;
|
|
len -= cc;
|
|
}
|
|
|
|
return total;
|
|
}
|