modbus_strerror3
Return the error message
Usage
const char *modbus_strerror(int errnum);
Overview
The modbus_strerror() function shall return a pointer to an error message string corresponding to the error number specified by the errnum argument. As libmodbus defines additional error numbers over and above those defined by the operating system, applications should use modbus_strerror() in preference to the standard strerror() function.
Return value
The modbus_strerror() function shall return a pointer to an error message string.
Errors
No errors are defined.
Examples
Display an error message when a Modbus connection cannot be established.
if (modbus_connect(ctx) == -1) {
fprintf(stderr, "Connection failed: %s\n", modbus_strerror(errno));
abort();
}
Releases
6 releases since Debian 7 (Wheezy); the text changed 5 times.