People, I need get the list of hard disk connected in C language on Linux system:
Example, running a program on a computer with 2 IDE disks and 1 SATA disk connected.
./a.out Out required:
/dev/hda /dev/hdb /dev/sda help?
- possible duplicate of Need libc APIs to access disk geometry and partitioning related infosarnold– sarnold2012-02-29 02:04:23 +00:00Commented Feb 29, 2012 at 2:04
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5 Answers
Use libsysfs, the recommended way to query the kernel about attached devices of all kinds.
1 Comment
Emiliano Gustavo Nuñez
I will check it out.. but I found 'ls /sys/block/' and I think it is a good solution. I need the more standart way. Thank!
FILE *fp = popen("fdisk -l | grep \"Disk /\" | awk '{print $2};' | sed 's/://'", "r"); while(fgets(path, sizeof(path) -1,fp) != NULL) //your code pclose(fp); 3 Comments
natinusala
This requires root on my system
Nitinkumar Ambekar
@natinusala, Use
sudo before fdisk if user is present in sudoers list.natinusala
It was just to point this out, if you want the code to be portable you shouldn't rely on code needing a root permission
The simplest way would be simply read and parse /proc/partitions.
1 Comment
Emiliano Gustavo Nuñez
This is the way what I don't want to do :D
Maybe you can reference fdisk's source code. Follow this website: ftp://ftp.gnu.org/gnu/fdisk
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Command Line
"ls /sys/block/"
will return output as:
sda sdb sdc
From there, you could creat a script that pipes it to a file, then read in that file as an array or linked list to manipulate the data however you see fit (such as adding /dev/ in front of all device names in the list).
