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40 lines
1.3 KiB
C
40 lines
1.3 KiB
C
/* write with error checking and retries.
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Copyright (C) 2016-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <support/xunistd.h>
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#include <support/check.h>
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void
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xwrite (int fd, const void *buffer, size_t length)
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{
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const char *p = buffer;
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const char *end = p + length;
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while (p < end)
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{
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ssize_t ret = write (fd, p, end - p);
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if (ret < 0)
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FAIL_EXIT1 ("write of %zu bytes failed after %td: %m",
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length, p - (const char *) buffer);
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if (ret == 0)
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FAIL_EXIT1 ("write return 0 after writing %td bytes of %zu",
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p - (const char *) buffer, length);
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p += ret;
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}
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}
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