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Annotation of coherent/b/lib/libc/sys/i386/dup2.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * libc/sys/i386/dup2.c
        !             3:  * Copyright (c) Bureau d'Etudes Ciaran O'Donnell,1987,1990,1991.
        !             4:  */
        !             5: 
        !             6: #include <sys/types.h>
        !             7: #include <sys/stat.h>
        !             8: #include <errno.h>
        !             9: #include <fcntl.h>
        !            10: 
        !            11: int
        !            12: dup2(fd1, fd2) register int fd1, fd2;
        !            13: {
        !            14:        register int save;
        !            15:        struct stat statb;
        !            16: 
        !            17:        save = errno;
        !            18:        if (fstat(fd1, &statb)<0) {
        !            19:                errno = EBADF;
        !            20:                return -1;
        !            21:        }
        !            22:        if (fd1==fd2)
        !            23:                return fd1;
        !            24:        close(fd2);
        !            25:        errno = save;
        !            26:        return fcntl(fd1, F_DUPFD, fd2);
        !            27: }
        !            28: 
        !            29: /* end of libc/sys/i386/dup2.c */

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