static void retrievePhysicalPortPrefixes()

in src/main/c/Posix/PosixHelperFunctions.c [241:272]

• 25 lines of code
• 12 McCabe index (conditional complexity)

static void retrievePhysicalPortPrefixes(stringVector* prefixes)
{
	// Open the TTY drivers file
	FILE *input = fopen("/proc/tty/drivers", "rb");
	if (input)
	{
		// Read the file line by line
		int maxLineSize = 256;
		char *line = (char*)malloc(maxLineSize);
		while (fgets(line, maxLineSize, input))
		{
			// Parse the prefix, name, and type fields
			int i = 0;
			char *token, *remainder = line, *prefix = NULL, *name = NULL, *type = NULL;
			while ((token = strtok_r(remainder, " \t\r\n", &remainder)))
				if (++i == 1)
					name = token;
				else if (i == 2)
					prefix = token;
				else if (i == 5)
					type = token;

			// Add a new prefix to the vector if the driver type and name are both "serial"
			if (prefix && type && name && (strcmp(type, "serial") == 0) && (strcmp(name, "serial") == 0))
				pushBackString(prefixes, prefix);
		}

		// Close the drivers file and clean up memory
		free(line);
		fclose(input);
	}
}