875ce094cf
$ dd bs=1G <sda1 of=/dev/sda1 dd: error writing '/dev/sda1': No space left on device 1+0 records in 0+0 records out 999292928 bytes (953.0MB) copied, 0.784617 seconds, 1.2GB/s function old new delta write_and_stats 99 102 +3 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
43 lines
850 B
C
43 lines
850 B
C
/* vi: set sw=4 ts=4: */
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/*
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* Utility routines.
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*
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* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*/
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#include "libbb.h"
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/*
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* Write all of the supplied buffer out to a file.
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* This does multiple writes as necessary.
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* Returns the amount written, or -1 if error was seen
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* on the very first write.
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*/
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ssize_t FAST_FUNC full_write(int fd, const void *buf, size_t len)
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{
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ssize_t cc;
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ssize_t total;
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total = 0;
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while (len) {
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cc = safe_write(fd, buf, len);
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if (cc < 0) {
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if (total) {
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/* we already wrote some! */
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/* user can do another write to know the error code */
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return total;
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}
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return cc; /* write() returns -1 on failure. */
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}
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total += cc;
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buf = ((const char *)buf) + cc;
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len -= cc;
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}
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return total;
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}
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