copying files to /proc/bus/usb

ic_torres · 10-09-2007, 05:39 AM

hi. i got a usb hardisk (enclosure) 80G that is partition into 4 of 20G. it was read by /proc/bus/usb.. owned by root :

[root@vector/proc/bus/usb]# ls -l
total 0
dr-xr-xr-x 2 root root 0 2007-10-09 16:12 001/
dr-xr-xr-x 2 root root 0 2007-10-09 16:12 002/
dr-xr-xr-x 2 root root 0 2007-10-09 16:12 003/
dr-xr-xr-x 2 root root 0 2007-10-09 16:12 004/
-r--r--r-- 1 root root 0 2007-10-09 16:12 devices

the problem is. . . i cannot copy files from it..

samples :

[root@vector/proc/bus/usb/001]# mkdir test
mkdir: cannot create directory `test': Operation not permitted

attempted to copy a file from my windows partition :

[root@vector/mnt/winbak]# cp lilo_vect5.8 /proc/bus/usb/001/
cp: cannot create regular file `/proc/bus/usb/001/lilo_vect5.8': Permission denied

do i have to configure something else? i google some sites.. i read some articles that usb hard disk should have an fs? is this true? because im also using my usb hd in windows. . .

i thought that this is just the same when using a usb flash drive. .

ghostdancer · 10-09-2007, 05:42 AM

Err... You are not suppose to that. You should try to understand what is the function of /proc/

Quote:

The Linux kernel has two primary functions: to control access to physical devices on the computer and to schedule when and how processes interact with these devices. The /proc/ directory contains a hierarchy of special files which represent the current state of the kernel — allowing applications and users to peer into the kernel's view of the system.

Within the /proc/ directory, one can find a wealth of information detailing the system hardware and any processes currently running. In addition, some of the files within the /proc/ directory tree can be manipulated by users and applications to communicate configuration changes to the kernel.

From: http://www.redhat.com/docs/manuals/l...e/ch-proc.html

Check your 'dmesg' output, if your USB disk is detected successfully, it should display as sdX (X is either a, b, c, ... depend on your system configuration).

syg00 · 10-09-2007, 06:03 AM

Simpler yet - enter (as root) "fdisk -l" in a terminal.
It'll tell you all the disks/partitions you have available to you.

Leave /proc alone - there are some writeable files there, but not what you're trying to do.

ic_torres · 10-09-2007, 06:04 AM

oh i see.. im sorry

here is the output of /var/log/messages :

Oct 9 19:10:30 darkstar kernel: usb 1-4: new high speed USB device using ehci_hcd and address 58
Oct 9 19:10:31 darkstar kernel: usb 1-4: new high speed USB device using ehci_hcd and address 59
Oct 9 19:10:31 darkstar kernel: usb 1-4: new high speed USB device using ehci_hcd and address 60
Oct 9 19:10:32 darkstar kernel: usb 1-4: new high speed USB device using ehci_hcd and address 61
Oct 9 19:10:32 darkstar kernel: usb 1-4: new high speed USB device using ehci_hcd and address 62

_____________________________________________

results of mount command :

/dev/hdc5 on / type reiserfs (rw)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
usbfs on /proc/bus/usb type usbfs (rw)
/dev/hdc6 on /boot type ext3 (rw)
/dev/hdc8 on /tmp type reiserfs (rw)
/dev/hdc9 on /var type reiserfs (rw)
/dev/hdc10 on /usr type reiserfs (rw)
/dev/hdc11 on /home type reiserfs (rw)
/dev/hda1 on /mnt/windows type vfat (rw)
/dev/hda5 on /mnt/winback type vfat (rw)

_________________________________________________

when i type dmesg the same output shows :

dmesg | grep usb
usb 1-4: new high speed USB device using ehci_hcd and address 49
usb 1-4: new high speed USB device using ehci_hcd and address 50
usb 1-4: new high speed USB device using ehci_hcd and address 51
usb 1-4: new high speed USB device using ehci_hcd and address 52
usb 1-4: new high speed USB device using ehci_hcd and address 53
usb 1-4: new high speed USB device using ehci_hcd and address 54
usb 1-4: new high speed USB device using ehci_hcd and address 55
usb 1-4: new high speed USB device using ehci_hcd and address 56
usb 1-4: new high speed USB device using ehci_hcd and address 57
usb 1-4: new high speed USB device using ehci_hcd and address 58
usb 1-4: new high speed USB device using ehci_hcd and address 59

ic_torres · 10-09-2007, 06:07 AM

Quote:

Originally Posted by syg00

Simpler yet - enter (as root) "fdisk -l" in a terminal.
It'll tell you all the disks/partitions you have available to you.

Leave /proc alone - there are some writeable files there, but not what you're trying to do.

sir the results :

Code:

fdisk -l

Disk /dev/hda: 41.1 GB, 41110142976 bytes
255 heads, 63 sectors/track, 4998 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/hda1   *           1        2449    19671561    c  W95 FAT32 (LBA)
/dev/hda2            2450        4998    20474842+   f  W95 Ext'd (LBA)
/dev/hda5            2450        4998    20474811    b  W95 FAT32

Disk /dev/hdc: 80.0 GB, 80026361856 bytes
16 heads, 63 sectors/track, 155061 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/hdc1               1       19376     9765472+  a6  OpenBSD
/dev/hdc2           19377       38752     9765504   83  Linux
/dev/hdc3           38753       58128     9765504   83  Linux
/dev/hdc4           58129      155061    48854232    5  Extended
/dev/hdc5           58129       62003     1952968+  83  Linux
/dev/hdc6           62004       62197       97744+  83  Linux
/dev/hdc7           62198       64135      976720+  82  Linux swap
/dev/hdc8           64136       66073      976720+  83  Linux
/dev/hdc9           66074       68011      976720+  83  Linux
/dev/hdc10          68012       77699     4882720+  83  Linux
/dev/hdc11          77700       97075     9765472+  83  Linux
/dev/hdc12         125998      155061    14648224+  83  Linux
/dev/hdc13          97076      125997    14576656+  83  Linux

Partition table entries are not in disk order
root@darkstar:~#

syg00 · 10-09-2007, 06:25 AM

Erk - maybe the udev rules aren't right. Have a look at dmesg, and look for the device that gets allocated - probably sda. Should also show the partitions on the device.
Make some mountpoints and mount the partitions manually.

ic_torres · 10-09-2007, 06:37 AM

just wondering.. .when im using my usb flash disk. .the files resides at /mnt/vl-hot/sda/vol1

but when i tested the usb hd --- /mnt/vl-hot/sda/vol1 does not have any contents. . .

syg00 · 10-09-2007, 06:48 AM

What does "df -hT" look like ???. After the flash is inserted, and after the USB is inserted.

ic_torres · 10-09-2007, 06:56 AM

Quote:

Originally Posted by syg00

What does "df -hT" look like ???. After the flash is inserted, and after the USB is inserted.

Code:

USB hd  inserted --slackware 12.0

Filesystem    Type    Size  Used Avail Use% Mounted on
/dev/hdc5 reiserfs    1.9G  489M  1.4G  26% /
/dev/hdc6     ext3     93M   22M   66M  25% /boot
/dev/hdc8 reiserfs    954M   36M  919M   4% /tmp
/dev/hdc9 reiserfs    954M   58M  896M   7% /var
/dev/hdc10
          reiserfs    4.7G  3.3G  1.5G  70% /usr
/dev/hdc11
          reiserfs    9.4G  3.1G  6.3G  33% /home
/dev/hda1     vfat     19G   14G  5.1G  74% /mnt/windows
/dev/hda5     vfat     20G   12G  7.9G  60% /mnt/winback


my USB flash disk works with VL so here it is:

df -hT
Filesystem    Type    Size  Used Avail Use% Mounted on
/dev/hdc12
          reiserfs     14G  6.1G  8.0G  43% /
none         tmpfs    506M     0  506M   0% /dev/shm
/dev/hda1     vfat     19G   14G  5.1G  74% /mnt/windows
/dev/hda5     vfat     20G   12G  7.9G  60% /mnt/winbak
/dev/sda1     vfat    499M  176M  324M  36% /mnt/vl-hot/sda/vol1


USB hd using VL :

df -hT
Filesystem    Type    Size  Used Avail Use% Mounted on
/dev/hdc12
          reiserfs     14G  6.1G  8.0G  43% /
none         tmpfs    506M     0  506M   0% /dev/shm
/dev/hda1     vfat     19G   14G  5.1G  74% /mnt/windows
/dev/hda5     vfat     20G   12G  7.9G  60% /mnt/winbak