4f294c247f
This patch mainly copies and modifies files existing in the current libc implementing minix specific functions. To keep consisten with the NetBSD libc, we remove namespace stubs and we use "namespace.h" and weak links.
35 lines
601 B
C
35 lines
601 B
C
#include <sys/cdefs.h>
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#include "namespace.h"
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#include <lib.h>
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#include <fcntl.h>
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#include <unistd.h>
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#ifdef __weak_alias
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__weak_alias(dup2, _dup2)
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#endif
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PUBLIC int dup2(fd, fd2)
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int fd, fd2;
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{
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/* The behavior of dup2 is defined by POSIX in 6.2.1.2 as almost, but not
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* quite the same as fcntl.
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*/
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if (fd2 < 0 || fd2 > OPEN_MAX) {
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errno = EBADF;
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return(-1);
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}
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/* Check to see if fildes is valid. */
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if (fcntl(fd, F_GETFL) < 0) {
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/* 'fd' is not valid. */
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return(-1);
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} else {
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/* 'fd' is valid. */
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if (fd == fd2) return(fd2);
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close(fd2);
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return(fcntl(fd, F_DUPFD, fd2));
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}
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}
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