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37 lines
702 B
C
37 lines
702 B
C
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/*
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* Copyright (c) 1991, Larry Wall
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*
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* You may distribute under the terms of either the GNU General Public
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* License or the Artistic License, as specified in the README file.
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*/
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#include "defines.h"
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#if defined(HAVE_FCNTL) && defined(F_DUPFD)
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# include <fcntl.h>
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#endif
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int
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dup2(oldfd,newfd)
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int oldfd;
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int newfd;
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{
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#if defined(HAVE_FCNTL) && defined(F_DUPFD)
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close(newfd);
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return fcntl(oldfd, F_DUPFD, newfd);
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#else
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int fdtmp[256];
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int fdx = 0;
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int fd;
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if (oldfd == newfd)
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return 0;
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close(newfd);
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while ((fd = dup(oldfd)) != newfd) /* good enough for low fd's */
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fdtmp[fdx++] = fd;
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while (fdx > 0)
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close(fdtmp[--fdx]);
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return 0;
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#endif
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}
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