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Annotation of researchv10dc/cmd/post/sys.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * System call module
        !             3:  */
        !             4: 
        !             5: #include <fcntl.h>
        !             6: 
        !             7: char   sys_fd[1];
        !             8: 
        !             9: char *
        !            10: sys_open(argv)
        !            11: char   *argv[];
        !            12: {
        !            13:        int     fd;
        !            14: 
        !            15:        if ((fd = open(argv[0], O_RDWR)) < 0) {
        !            16:                error(-1, argv[0]);
        !            17:                return 0;
        !            18:        }
        !            19:        return sys_fd + fd;
        !            20: }
        !            21: 
        !            22: sys_close(fd)
        !            23: char   *fd;
        !            24: {
        !            25:        close(fd - sys_fd);
        !            26:        return 0;
        !            27: }
        !            28: 
        !            29: sys_read(fd, buf, n)
        !            30: char   *fd, *buf;
        !            31: {
        !            32:        return read(fd - sys_fd, buf, n);
        !            33: }
        !            34: 
        !            35: sys_write(fd, buf, n)
        !            36: char   *fd, *buf;
        !            37: {
        !            38:        return write(fd - sys_fd, buf, n);
        !            39: }

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