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42 lines
817 B
C
42 lines
817 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 on an error.
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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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