24 lines
451 B
C
24 lines
451 B
C
/*
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* Public domain
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*
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* Kinichiro Inoguchi <inoguchi@openbsd.org>
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*/
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#include <unistd.h>
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ssize_t
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pwrite(int d, const void *buf, size_t nbytes, off_t offset)
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{
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off_t cpos, opos, rpos;
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ssize_t bytes;
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if((cpos = lseek(d, 0, SEEK_CUR)) == -1)
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return -1;
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if((opos = lseek(d, offset, SEEK_SET)) == -1)
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return -1;
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if((bytes = write(d, buf, nbytes)) == -1)
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return -1;
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if((rpos = lseek(d, cpos, SEEK_SET)) == -1)
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return -1;
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return bytes;
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}
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