84d9c625bf
- Fix for possible unset uid/gid in toproto
- Fix for default mtree style
- Update libelf
- Importing libexecinfo
- Resynchronize GCC, mpc, gmp, mpfr
- build.sh: Replace params with show-params.
This has been done as the make target has been renamed in the same
way, while a new target named params has been added. This new
target generates a file containing all the parameters, instead of
printing it on the console.
- Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org)
get getservbyport() out of the inner loop
Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
31 lines
540 B
C
31 lines
540 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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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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