Autodetect new usb pen drive

[bolovan]

Hello to all

I make a app (in C language) that need to autodetect new flash drives that are plugged in USB ports. I need to mount that drive and launch a app from the pen drive. I can't find any code (any libs) that are help me to automaticaly detect new pen drives. Here are any ideeas?
Currently I use /proc/partitions (I load in memory a structure at startup...and at every 5 seconds I compare the data from memory with /proc/partitios)

[Rubberman]

Use the inotify tools and/or api's to see when the directory /media gets a new entry. That will show you when any new removable drive is plugged into the system and auto-mounted by the OS.

[bolovan]

Rubberman the problem is that we don't have automount (we don't want to use).
It will be on some embeded system. The executed file should be load only in some situations. We don't want not even to automount...only on some situations (for example, only when is inserted a pen with a special serial number)
And for this I need a library.

[Rubberman]

Even if you don't have automount active, it will create a new device entry in /dev, so you can use the inotify C language APIs to detect a new drive type of device (/dev/sdx) when it is plugged in or unplugged. Also, you can monitor changes in /proc/bus/usb/devices and then read that to see if the newly plugged in USB device is a storage device. For example, I just plugged in a USB thumb drive into my USB hub and the following entry was added to /proc/bus/usb/devices:

T:  Bus=01 Lev=02 Prnt=14 Port=02 Cnt=02 Dev#= 19 Spd=480 MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=05dc ProdID=a440 Rev=30.00
S:  Manufacturer=Lexar Media
S:  Product=JD Lightning
S:  SerialNumber=33000001937000002541
C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=500mA
I:  If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage
E:  Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=31875us

As you can see, even the serial number is there, so you can then use that to determine if you want to allow any operations on this device.