How to create virtual usb key
I have a service that manages a USB key (format, mount/umount, read/write, check space) coded in Python 2. This service call system to manage the device (mount/umount, mkfs, state) and monitor /proc/mounts to check mounting status.
There are some tests to check the service behaviour, but I am unable to test the service without a real USB key but it's an issue for Jenkins slaves.
I tried to mount the loop device, but this technic require to modify the service to manage this specific device.
- Do you know some technics to create a virtual device that behaves as a USB key?
- Do you know a way to test this kind of service ?
linux usb debian python
asked Jan 31 at 9:57
chepseskafchepseskaf
1841211
add a comment |
I have a service that manages a USB key (format, mount/umount, read/write, check space) coded in Python 2. This service call system to manage the device (mount/umount, mkfs, state) and monitor /proc/mounts to check mounting status.
There are some tests to check the service behaviour, but I am unable to test the service without a real USB key but it's an issue for Jenkins slaves.
I tried to mount the loop device, but this technic require to modify the service to manage this specific device.
- Do you know some technics to create a virtual device that behaves as a USB key?
- Do you know a way to test this kind of service ?
linux usb debian python
asked Jan 31 at 9:57
chepseskafchepseskaf
1841211
add a comment |
I have a service that manages a USB key (format, mount/umount, read/write, check space) coded in Python 2. This service call system to manage the device (mount/umount, mkfs, state) and monitor /proc/mounts to check mounting status.
There are some tests to check the service behaviour, but I am unable to test the service without a real USB key but it's an issue for Jenkins slaves.
I tried to mount the loop device, but this technic require to modify the service to manage this specific device.
- Do you know some technics to create a virtual device that behaves as a USB key?
- Do you know a way to test this kind of service ?
linux usb debian python
asked Jan 31 at 9:57
chepseskafchepseskaf
1841211
I have a service that manages a USB key (format, mount/umount, read/write, check space) coded in Python 2. This service call system to manage the device (mount/umount, mkfs, state) and monitor /proc/mounts to check mounting status.
There are some tests to check the service behaviour, but I am unable to test the service without a real USB key but it's an issue for Jenkins slaves.
I tried to mount the loop device, but this technic require to modify the service to manage this specific device.
- Do you know some technics to create a virtual device that behaves as a USB key?
- Do you know a way to test this kind of service ?
linux usb debian python
linux usb debian python
asked Jan 31 at 9:57
chepseskafchepseskaf
1841211
asked Jan 31 at 9:57
chepseskafchepseskaf
1841211
asked Jan 31 at 9:57
chepseskafchepseskaf
1841211
asked Jan 31 at 9:57
chepseskafchepseskaf
1841211
asked Jan 31 at 9:57
chepseskafchepseskaf
1841211
1841211
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
Reading an artcle about Linux-USB Gadget API Framework, I found a way to mount a device as if it was a USB key using loop device (here):
create a virtual drive :
fallocate -l 128M /tmp/virtual_drive.img
attach this as loop device:
sudo losetup -o512 /tmp/virtual_drive.img /dev/loop0
Then this virtual device is used as-is by the service.
answered Feb 21 at 11:52
chepseskafchepseskaf
1841211
USB Gadgets andlosetuparen't really related... From your question, I'd suggest thatlosetupalone doesn't achieve what you're after - emulating a USB mass storage device.
– Attie
Feb 21 at 12:25
1
@Attie I am agree with you: what I meant was that by reading an article on USB gadget, I realized that losetup was enough. I was able to simplify the procedure without going as far as emulating the USB key.
– chepseskaf
Feb 22 at 7:26
add a comment |
Your Answer
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "3"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fsuperuser.com%2fquestions%2f1400473%2fhow-to-create-virtual-usb-key%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Reading an artcle about Linux-USB Gadget API Framework, I found a way to mount a device as if it was a USB key using loop device (here):
create a virtual drive :
fallocate -l 128M /tmp/virtual_drive.img
attach this as loop device:
sudo losetup -o512 /tmp/virtual_drive.img /dev/loop0
Then this virtual device is used as-is by the service.
answered Feb 21 at 11:52
chepseskafchepseskaf
1841211
USB Gadgets andlosetuparen't really related... From your question, I'd suggest thatlosetupalone doesn't achieve what you're after - emulating a USB mass storage device.
– Attie
Feb 21 at 12:25
1
@Attie I am agree with you: what I meant was that by reading an article on USB gadget, I realized that losetup was enough. I was able to simplify the procedure without going as far as emulating the USB key.
– chepseskaf
Feb 22 at 7:26
add a comment |
Reading an artcle about Linux-USB Gadget API Framework, I found a way to mount a device as if it was a USB key using loop device (here):
create a virtual drive :
fallocate -l 128M /tmp/virtual_drive.img
attach this as loop device:
sudo losetup -o512 /tmp/virtual_drive.img /dev/loop0
Then this virtual device is used as-is by the service.
answered Feb 21 at 11:52
chepseskafchepseskaf
1841211
USB Gadgets andlosetuparen't really related... From your question, I'd suggest thatlosetupalone doesn't achieve what you're after - emulating a USB mass storage device.
– Attie
Feb 21 at 12:25
1
@Attie I am agree with you: what I meant was that by reading an article on USB gadget, I realized that losetup was enough. I was able to simplify the procedure without going as far as emulating the USB key.
– chepseskaf
Feb 22 at 7:26
add a comment |
Reading an artcle about Linux-USB Gadget API Framework, I found a way to mount a device as if it was a USB key using loop device (here):
create a virtual drive :
fallocate -l 128M /tmp/virtual_drive.img
attach this as loop device:
sudo losetup -o512 /tmp/virtual_drive.img /dev/loop0
Then this virtual device is used as-is by the service.
answered Feb 21 at 11:52
chepseskafchepseskaf
1841211
Reading an artcle about Linux-USB Gadget API Framework, I found a way to mount a device as if it was a USB key using loop device (here):
create a virtual drive :
fallocate -l 128M /tmp/virtual_drive.img
attach this as loop device:
sudo losetup -o512 /tmp/virtual_drive.img /dev/loop0
Then this virtual device is used as-is by the service.
answered Feb 21 at 11:52
chepseskafchepseskaf
1841211
edited Feb 22 at 7:31
answered Feb 21 at 11:52
chepseskafchepseskaf
1841211
answered Feb 21 at 11:52
chepseskafchepseskaf
1841211
answered Feb 21 at 11:52
chepseskafchepseskaf
1841211
1841211
USB Gadgets andlosetuparen't really related... From your question, I'd suggest thatlosetupalone doesn't achieve what you're after - emulating a USB mass storage device.
– Attie
Feb 21 at 12:25
1
@Attie I am agree with you: what I meant was that by reading an article on USB gadget, I realized that losetup was enough. I was able to simplify the procedure without going as far as emulating the USB key.
– chepseskaf
Feb 22 at 7:26
add a comment |
USB Gadgets andlosetuparen't really related... From your question, I'd suggest thatlosetupalone doesn't achieve what you're after - emulating a USB mass storage device.
– Attie
Feb 21 at 12:25
1
@Attie I am agree with you: what I meant was that by reading an article on USB gadget, I realized that losetup was enough. I was able to simplify the procedure without going as far as emulating the USB key.
– chepseskaf
Feb 22 at 7:26
USB Gadgets and
losetup aren't really related... From your question, I'd suggest that losetup alone doesn't achieve what you're after - emulating a USB mass storage device.– Attie
Feb 21 at 12:25
USB Gadgets and
losetup aren't really related... From your question, I'd suggest that losetup alone doesn't achieve what you're after - emulating a USB mass storage device.– Attie
Feb 21 at 12:25
1
1
@Attie I am agree with you: what I meant was that by reading an article on USB gadget, I realized that losetup was enough. I was able to simplify the procedure without going as far as emulating the USB key.
– chepseskaf
Feb 22 at 7:26
@Attie I am agree with you: what I meant was that by reading an article on USB gadget, I realized that losetup was enough. I was able to simplify the procedure without going as far as emulating the USB key.
– chepseskaf
Feb 22 at 7:26
add a comment |
Thanks for contributing an answer to Super User!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fsuperuser.com%2fquestions%2f1400473%2fhow-to-create-virtual-usb-key%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
