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CONTRIBUTIONS/cpm-handbook/cpmsrc/TIME.C

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+#define VN "\nTIME Vn 1.0 02/18/83"
+/* This utility accepts the current time from the command tail
+   validates it, and set the internal system time in the BIOS.
+   Alternatively, it can be requested just to display the current
+   system time. */
+
+#include <LIBRARY.H>
+
+char *time;		/* pointer to the time in the config. block */
+char *time_set;		/* pointer to the time set flag */
+int hh,mm,ss;		/* variables to hold hours, minutes, seconds */
+int mcount;		/* match count of numeric values entered */
+int count;		/* count used to add leading 0's to time */
+
+main(argc,argv)
+int argc;
+char *argv[];
+{
+printf(VN);		/* display signon message */
+time = get_cba(CB_TIMEA);	/* set pointer to time */
+time_flag = get_cba(CB_DTFLAGS);	/* set pointer to the time set flag */
+hh = mm = ss = 0;	/* initialize the time in case seconds or
+			   minutes are not specified */
+
+if (argc != 2)		/* check if help requested (or needed) */
+	show_use();	/* display correct usage and exit */
+
+if (usstrcmp("SHOW",argv[1]))	/* check if not SHOW option */
+	{
+		/* convert time into hours, minutes, seconds */
+	mcount = sscanf(argv[1],"%d:%d:%d",&hh,&mm,&ss);
+	if (!mcount)		/* input not numeric */
+		show_use();	/* display correct usage and exit */
+
+	if (hh > 12)		/* check valid hours, minutes, seconds */
+		{
+		printf("\n\007Hours = %d is illegal.",hh);
+		show_use();	/* display correct usage and exit */
+		}
+	if (mm > 59)
+		{
+		printf("\n\007Minutes = %d is illegal.",mm);
+		show_use();	/* display correct usage and exit */
+		}
+	if (ss > 59)
+		{
+		show_use();	/* display correct usage and exit */
+		printf("\n\007Seconds = %d is illegal.",ss);
+		}
+
+		/* convert integers back into formatted string */
+	sprintf(time,"%2d:%2d:%2d",hh,mm,ss);
+	time[8] = 0x0A;		/* terminate with line feed */
+	time[9] = '\0';		/* new string terminator */
+
+		/* convert " 1: 2: 3" into "01:02:03" */
+	for (count = 0; count < 7; count+=3)
+		{
+		if (time[count] == ' ')
+			time[count] = '0';
+		}
+		/* turn bit on to indicate that the time has been set */
+	*time_flag |= TIME_SET;
+	}
+
+printf("\n\tCurrent Time is %s",time);
+}
+
+show_use()		/* display correct usage and exit */
+{
+printf("\nTIME sets the system time. Usage is :");
+printf("\n\tTIME hh{:mm{:ss}}");
+printf("\n\tTIME SHOW (to display current time)\n");
+exit();
+}
+
+