idev.c

完整的Bell实验室的嵌入式文件系统TFS

/* idev.c:
 *  Provide some interface to display/modify current device configuration.
 *
 *  General notice:
 *  This code is part of a boot-monitor package developed as a generic base
 *  platform for embedded system designs.  As such, it is likely to be
 *  distributed to various projects beyond the control of the original
 *  author.  Please notify the author of any enhancements made or bugs found
 *  so that all may benefit from the changes.  In addition, notification back
 *  to the author will allow the new user to pick up changes that may have
 *  been made by other users after this version of the code was distributed.
 *
 *  Note1: the majority of this code was edited with 4-space tabs.
 *  Note2: as more and more contributions are accepted, the term "author"
 *         is becoming a mis-representation of credit.
 *
 *  Original author:    Ed Sutter
 *  Email:              [e-mail]
 *  Phone:              908-582-2351
 */
#include "config.h"
#include "genlib.h"
#include "stddefs.h"
#include "devices.h"
#include "cli.h"

char *IdevHelp[] = {
    "Device interface",
    "-[d:] [command] [arg(s)]",
    " -d {devid}  device id (default = console)",
    " Commands:",
    "  baud {baudrate}",
    "  console",
    " Note: not all commands apply to all devices",
    0,
};

int
Idev(int argc,char **argv)
{
    int opt, devid;

    /* If no args, just dump current status. */
    if (argc == 1) {
        devtbldump();
        return(CMD_SUCCESS);
    }

    devid = ConsoleDevice;
    while ((opt=getopt(argc,argv,"d:")) != -1) {
        switch(opt) {
            case 'd':
                devid = atoi(optarg);
                break;
            default:
                return(CMD_PARAM_ERROR);
        }
    }

    if (isbaddev(devid))
        return(CMD_FAILURE);

    if (!strcmp(argv[optind],"console")) {
        ConsoleDevice = devid;
    }
    else if (!strcmp(argv[optind],"baud")) {
        if (ioctl(devid,SETBAUD,atoi(argv[optind+1]),0) < 0) {
            printf("Command '%s' failed for %s\n",
                argv[optind],devtbl[devid].name);
            return(CMD_FAILURE);
        }
    }
    else
        return(CMD_PARAM_ERROR);

    return(CMD_SUCCESS);
}