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Annotation of 41BSD/libc/stdio/fdopen.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Unix routine to do an "fopen" on file descriptor
        !             3:  * The mode has to be repeated because you can't query its
        !             4:  * status
        !             5:  */
        !             6: 
        !             7: #include       <stdio.h>
        !             8: #include       <errno.h>
        !             9: 
        !            10: FILE *
        !            11: fdopen(fd, mode)
        !            12: register char *mode;
        !            13: {
        !            14:        extern int errno;
        !            15:        register FILE *iop;
        !            16:        extern FILE *_lastbuf;
        !            17: 
        !            18:        for (iop = _iob; iop->_flag&(_IOREAD|_IOWRT); iop++)
        !            19:                if (iop >= _lastbuf)
        !            20:                        return(NULL);
        !            21:        iop->_cnt = 0;
        !            22:        iop->_file = fd;
        !            23:        if (*mode != 'r') {
        !            24:                iop->_flag |= _IOWRT;
        !            25:                if (*mode == 'a')
        !            26:                        lseek(fd, 0L, 2);
        !            27:        } else
        !            28:                iop->_flag |= _IOREAD;
        !            29:        return(iop);
        !            30: }

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