Solved

check if a com port exists by C code

Posted on 2001-06-18
2
735 Views
Last Modified: 2011-10-03
How can we check if a com port exists by C code?
0
Comment
Question by:mathematics
2 Comments
 
LVL 5

Expert Comment

by:garboua
ID: 6205981
I don't know how to check using c, but they should be under /dev listed as ttys0-ttys3
0
 

Accepted Solution

by:
ragaMuffin earned 20 total points
ID: 6208013
com ports are character devices.  As a character device is initialized, its device driver registers itself with the linux kernel by adding an entry into the chrdevs vector of device_struct data structure.  You can call a device and tread it exaclty like a file.  operation on a character device include iseek,read,write,readdir,select,ioctl .... etc.
you can use the open function with O_RDONLY, O_WRONLY, or O_RDWR
do a man on open to get details and header files needed.
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Have you ever been frustrated by having to click seven times in order to retrieve a small bit of information from the web, always the same seven clicks, scrolling down and down until you reach your target? When you know the benefits of the command l…
The purpose of this article is to demonstrate how we can upgrade Python from version 2.7.6 to Python 2.7.10 on the Linux Mint operating system. I am using an Oracle Virtual Box where I have installed Linux Mint operating system version 17.2. Once yo…
Microsoft Active Directory, the widely used IT infrastructure, is known for its high risk of credential theft. The best way to test your Active Directory’s vulnerabilities to pass-the-ticket, pass-the-hash, privilege escalation, and malware attacks …

821 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question