libmisc/shell/main_rtc.c

0001 /**
0002  * @file
0003  *
0004  * Real time clock shell command.
0005  */
0006
0007 /*
0008  * Copyright (c) 2009 embedded brains GmbH & Co. KG
0009  *
0010  * The license and distribution terms for this file may be
0011  * found in the file LICENSE in this distribution or at
0012  * http://www.rtems.org/license/LICENSE.
0013  */
0014
0015 #ifdef HAVE_CONFIG_H
0016 #include "config.h"
0017 #endif
0018
0019 #include <stdio.h>
0020 #include <inttypes.h>
0021 #include <sys/types.h>
0022 #include <sys/stat.h>
0023 #include <fcntl.h>
0024
0025 #include <rtems.h>
0026 #include <rtems/rtc.h>
0027 #include <rtems/error.h>
0028 #include <rtems/shell.h>
0029
0030 #define RTEMS_RTC_SHELL_ERROR( fmt, ...) \
0031   do { \
0032     printf( "error: " fmt "\n", ##__VA_ARGS__); \
0033     return -1; \
0034   } while (0)
0035
0036 #define RTEMS_RTC_SHELL_ERROR_SC( sc, fmt, ...) \
0037   if ((sc) != RTEMS_SUCCESSFUL) { \
0038     printf( "error: " fmt ": %s\n", ##__VA_ARGS__, rtems_status_text( sc)); \
0039     return -1; \
0040   }
0041
0042 static const char rtems_rtc_shell_usage [] =
0043   "real time clock read and set\n"
0044   "\n"
0045   "rtc\n"
0046   "\tprints the current time of day\n"
0047   "\n"
0048   "rtc YYYY-MM-DD [HH:MM:SS [TICKS]]\n"
0049   "\tsets the time of day and real time clock";
0050
0051 static int rtems_rtc_shell_main( int argc, char **argv)
0052 {
0053   rtems_status_code sc = RTEMS_SUCCESSFUL;
0054   rtems_time_of_day tod = {
0055     .year = 1988,
0056     .month = 1,
0057     .day = 1,
0058     .hour = 0,
0059     .minute = 0,
0060     .second = 0,
0061     .ticks = 0
0062   };
0063
0064   if (argc == 1) {
0065     sc = rtems_clock_get_tod( &tod);
0066     RTEMS_RTC_SHELL_ERROR_SC( sc, "get time of day");
0067
0068     printf(
0069       "%04" PRIu32 "-%02" PRIu32 "-%02" PRIu32
0070         " %02" PRIu32 ":%02" PRIu32 ":%02" PRIu32
0071         " %02" PRIu32 "\n",
0072       tod.year,
0073       tod.month,
0074       tod.day,
0075       tod.hour,
0076       tod.minute,
0077       tod.second,
0078       tod.ticks
0079     );
0080   } else if (argc > 1 && argc < 5) {
0081     int rv = 0;
0082     int fd = 0;
0083     ssize_t n = 0;
0084     uint32_t v [3];
0085
0086     if (argc > 1) {
0087       rv = sscanf(
0088         argv [1],
0089         "%04" PRIu32 "-%02" PRIu32 "-%02" PRIu32,
0090         v,
0091         v + 1,
0092         v + 2
0093       );
0094
0095       if (rv == 3) {
0096         tod.year = v [0];
0097         tod.month = v [1];
0098         tod.day = v [2];
0099       } else {
0100         RTEMS_RTC_SHELL_ERROR( "unexpected YYYY-MM-DD input: %s", argv [1]);
0101       }
0102     }
0103
0104     if (argc > 2) {
0105       rv = sscanf(
0106         argv [2],
0107         "%04" PRIu32 ":%02" PRIu32 ":%02" PRIu32,
0108         v,
0109         v + 1,
0110         v + 2
0111       );
0112
0113       if (rv == 3) {
0114         tod.hour = v [0];
0115         tod.minute = v [1];
0116         tod.second = v [2];
0117       } else {
0118         RTEMS_RTC_SHELL_ERROR( "unexpected HH:MM:SS input: %s", argv [2]);
0119       }
0120     }
0121
0122     if (argc > 3) {
0123       rv = sscanf( argv [3], "%5" PRIu32, v);
0124
0125       if (rv == 1) {
0126         tod.ticks = v [0];
0127       } else {
0128         RTEMS_RTC_SHELL_ERROR( "unexpected TICKS input: %s", argv [3]);
0129       }
0130     }
0131
0132     sc = rtems_clock_set( &tod);
0133     RTEMS_RTC_SHELL_ERROR_SC( sc, "set time of day");
0134
0135     fd = open( RTC_DEVICE_NAME, O_WRONLY);
0136     if (fd < 0) {
0137       perror( "error: open " RTC_DEVICE_NAME);
0138       return -1;
0139     }
0140
0141     n = write( fd, &tod, sizeof( tod));
0142     if (n != (ssize_t) sizeof( tod)) {
0143       perror( "error: write to " RTC_DEVICE_NAME);
0144       close( fd);
0145       return -1;
0146     }
0147
0148     rv = close( fd);
0149     if (rv != 0) {
0150       perror( "error: close " RTC_DEVICE_NAME);
0151       return -1;
0152     }
0153   } else {
0154     puts( rtems_rtc_shell_usage);
0155     return -1;
0156   }
0157
0158   return 0;
0159 }
0160
0161 struct rtems_shell_cmd_tt rtems_shell_RTC_Command = {
0162   .name = "rtc",
0163   .usage = rtems_rtc_shell_usage,
0164   .topic = "misc",
0165   .command = rtems_rtc_shell_main,
0166   .alias = NULL,
0167   .next = NULL
0168 };