HP Sander 16500C manual Directory

Programming Over LAN

Writing to \system\program from a Program

Example	The following example in C opens the \system\program file and sends
	several commands and queries. Responses to queries appear as text strings
	in \system\program. The HP 16500C has been NFS-mounted in the \users
	directory.
	#include <stdio.h>
	#include <unistd.h>
	#define STR_LEN 80
	void putstr(FILE *file, char *str)
	{
	fwrite(str, strlen(str), 1, file);
	}
	int getstr(FILE *file, char* str)
	{
	return(fread(str, 1, STR_LEN, file));
	}
	void main()
	{
	FILE *file;
	int num;
	char receive_str[STR_LEN];
	/* Send a query and retrieve and print the response*/
	file = fopen("/users/system/program", "r");
	while (getstr(file, receive_str) != 0);
	fclose(file);
	file = fopen("/users/system/program", "w");
	putstr(file, "*idn?\n");
	fclose(file);
	sleep(1);
	file = fopen("/users/system/program", "r");
	while (getstr(file, receive_str) == 0);
	fclose(file);
	printf("%s\n", receive_str);

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