vasilito
ff4ff35918
Red Bear OS is a full fork. All sources must be available from git clone with zero network access. Removed gitignore rules that excluded fetched source trees under recipes/*/source/, local/recipes/kde/*/source/, local/recipes/qt/*/source/, and vendor source trees. Build artifacts (target/, build/, source.tar, *.o, *.so) remain excluded. 127291 files added — kernel, relibc, base, bootloader, pkgar, all KDE/Qt frameworks, mesa, wayland, DRM drivers, and every other recipe source.
38 lines
855 B
C
38 lines
855 B
C
/*
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* Public domain dup2() lookalike
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* by Curtis Jackson @ AT&T Technologies, Burlington, NC
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* electronic address: burl!rcj
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*
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* dup2 performs the following functions:
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*
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* Check to make sure that fd1 is a valid open file descriptor.
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* Check to see if fd2 is already open; if so, close it.
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* Duplicate fd1 onto fd2; checking to make sure fd2 is a valid fd.
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* Return fd2 if all went well; return BADEXIT otherwise.
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*/
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#include <errno.h>
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#include <fcntl.h>
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#include <unistd.h>
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#define BADEXIT -1
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int
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dup2(int fd1, int fd2)
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{
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if (fd1 != fd2) {
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#ifdef F_DUPFD
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if (fcntl(fd1, F_GETFL) < 0)
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return BADEXIT;
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if (fcntl(fd2, F_GETFL) >= 0)
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close(fd2);
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if (fcntl(fd1, F_DUPFD, fd2) < 0)
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return BADEXIT;
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#else
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errno = ENOTSUP;
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return BADEXIT;
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#endif
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}
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return fd2;
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}
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