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79 lines
2.5 KiB
C
79 lines
2.5 KiB
C
#define VN "\nDATE Vn 1.0 02/18/83"
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/* This utility accepts the current date from the command tail
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validates it, and set the internal system date in the BIOS.
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Alternatively, it can be requested just to display the current
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system date. */
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#include <LIBRARY.H>
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char *date; /* pointer to the date in the config. block */
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char *date_flag; /* pointer to date set flag */
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int mm,dd,yy; /* variables to hold month, day, year */
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int mcount; /* match count of numeric values entered */
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int count; /* count used to add leading 0's to date */
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main(argc,argv)
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int argc;
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char *argv[];
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{
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printf(VN); /* display signon message */
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date = get_cba(CB_DATE); /* set pointer to date */
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date_flag = get_cba(CB_DTFLAGS); /* set pointer to "date set" flag */
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if (argc != 2) /* check if help requested (or needed) */
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show_use(); /* display correct usage and exit */
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if (usstrcmp("SHOW",argv[1])) /* check if not SHOW option */
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{
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/* convert specified time into month, day, year */
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mcount = sscanf(argv[1],"%d/%d/%d",&mm,&dd,&yy);
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if (mcount != 3) /* input not numeric */
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show_use(); /* display correct usage and exit */
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/* NOTE : The following validity checking is VERY
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simplistic - this could be expanded to accomodate
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more context-sensitive checking, days in the month,
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leap years, etc. */
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if (mm > 12 || mm < 1) /* check valid month, day, year */
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{
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printf("\nMonth = %d is illegal.",mm);
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show_use(); /* display correct usage and exit */
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}
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if (dd > 31 || dd < 1)
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{
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printf("\nDay = %d is illegal.",dd);
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show_use(); /* display correct usage and exit */
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}
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if (yy > 90 || yy < 83) /* <=== NOTE ! */
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{
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printf("\nYear = %d is illegal.",yy);
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show_use(); /* display correct usage and exit */
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}
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/* convert integers back into a formatted string */
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sprintf(date,"%2d/%2d/%2d",mm,dd,yy);
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date[8] = 0x0A; /* terminate with line feed */
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date[9] = '\0'; /* new string terminator */
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/* change " 1/ 2/ 3" into "01/02/03" */
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for (count = 0; count < 7; count+=3)
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{
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if (date[count] == ' ')
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date[count] = '0';
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}
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/* turn flag on to indicate that the user has set the date */
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*date_flag |= DATE_SET;
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}
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printf("\n\tCurrent Date is %s",date);
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}
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show_use() /* display correct usage and exit */
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{
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printf("\nDATE sets the system date. Usage is :");
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printf("\n\tDATE mm/dd/yy");
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printf("\n\tDATE SHOW (to display current date)\n");
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exit();
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}
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