static char isUsbSerialSubsystem()

in src/main/c/Posix/PosixHelperFunctions.c [274:296]

• 22 lines of code
• 6 McCabe index (conditional complexity)

static char isUsbSerialSubsystem(const char *subsystemLink)
{
	// Attempt to read the path that the subsystem link points to
	struct stat fileInfo;
	char *subsystem = NULL, isUsbSerial = 0;
	if (lstat(subsystemLink, &fileInfo) == 0)
	{
		ssize_t bufferSize = fileInfo.st_size ? (fileInfo.st_size + 1) : PATH_MAX;
		subsystem = (char*)malloc(bufferSize);
		if (subsystem)
		{
			ssize_t subsystemSize = readlink(subsystemLink, subsystem, bufferSize);
			if (subsystemSize >= 0)
			{
				subsystem[subsystemSize] = '\0';
				if (strcmp(1 + strrchr(subsystem, '/'), "usb-serial") == 0)
					isUsbSerial = 1;
			}
			free(subsystem);
		}
	}
	return isUsbSerial;
}