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Annotation of xinu/sys/shell/x_help.c, revision 1.1

1.1     ! root        1: /* x_help.c - x_help */
        !             2: 
        !             3: #include <conf.h>
        !             4: #include <kernel.h>
        !             5: #include <shell.h>
        !             6: #include <cmd.h>
        !             7: 
        !             8: #define        COLUMNS 4                       /* number of columns to print   */
        !             9: 
        !            10: /*------------------------------------------------------------------------
        !            11:  *  x_help  -  (command help) print possible command names for user
        !            12:  *------------------------------------------------------------------------
        !            13:  */
        !            14: COMMAND        x_help(stdin, stdout, stderr, nargs, args)
        !            15: int    stdin, stdout, stderr, nargs;
        !            16: char   *args[];
        !            17: {
        !            18:        int     inc;                    /* command names per column     */
        !            19:        int     i;                      /* move through printed rows    */
        !            20:        int     j;                      /* move across printed columns  */
        !            21: 
        !            22: 
        !            23:        if ( (inc=(Shl.shncmds+COLUMNS-1)/COLUMNS) <= 0)
        !            24:                inc = 1;
        !            25:        fprintf(stdout, "Commands are:\n");
        !            26:        for(i=0 ; i<inc && i<Shl.shncmds ; i++) {
        !            27:                fprintf(stdout, "  ");
        !            28:                for (j=i ; j<Shl.shncmds ; j+=inc)
        !            29:                        fprintf(stdout, "%-16s", cmds[j].cmdnam);
        !            30:                fprintf(stdout, "\n");
        !            31:        }
        !            32:        return(OK);
        !            33: }

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