Print percentage (%) of files used by a command
Clash Royale CLAN TAG#URR8PPP
I'm building docker images to be used in CI/CD pipelines by other developers. After the image build is complete, I run a few commands to do some test coverage. I'm curious if there's a Linux command that will print out the percentage of files access by a command (or series of commands).
Example:
# ls -l /var/opt | how-many-files-were-used-on-the-os
> 4%
Obviously, this doesn't work so well on a system that is in a constant running state, but I believe this could really help in containers where a minimal number of commands are running
linux docker command
asked Jan 9 at 16:03
RakaimRakaim
1467
add a comment |
I'm building docker images to be used in CI/CD pipelines by other developers. After the image build is complete, I run a few commands to do some test coverage. I'm curious if there's a Linux command that will print out the percentage of files access by a command (or series of commands).
Example:
# ls -l /var/opt | how-many-files-were-used-on-the-os
> 4%
Obviously, this doesn't work so well on a system that is in a constant running state, but I believe this could really help in containers where a minimal number of commands are running
linux docker command
asked Jan 9 at 16:03
RakaimRakaim
1467
1
unix.stackexchange.com/q/58887/255251
– P_Yadav
Jan 9 at 16:25
add a comment |
I'm building docker images to be used in CI/CD pipelines by other developers. After the image build is complete, I run a few commands to do some test coverage. I'm curious if there's a Linux command that will print out the percentage of files access by a command (or series of commands).
Example:
# ls -l /var/opt | how-many-files-were-used-on-the-os
> 4%
Obviously, this doesn't work so well on a system that is in a constant running state, but I believe this could really help in containers where a minimal number of commands are running
linux docker command
asked Jan 9 at 16:03
RakaimRakaim
1467
I'm building docker images to be used in CI/CD pipelines by other developers. After the image build is complete, I run a few commands to do some test coverage. I'm curious if there's a Linux command that will print out the percentage of files access by a command (or series of commands).
Example:
# ls -l /var/opt | how-many-files-were-used-on-the-os
> 4%
Obviously, this doesn't work so well on a system that is in a constant running state, but I believe this could really help in containers where a minimal number of commands are running
linux docker command
linux docker command
asked Jan 9 at 16:03
RakaimRakaim
1467
asked Jan 9 at 16:03
RakaimRakaim
1467
edited Jan 9 at 21:48
Rakaim
asked Jan 9 at 16:03
RakaimRakaim
1467
asked Jan 9 at 16:03
RakaimRakaim
1467
asked Jan 9 at 16:03
RakaimRakaim
1467
1467
1
unix.stackexchange.com/q/58887/255251
– P_Yadav
Jan 9 at 16:25
add a comment |
1
unix.stackexchange.com/q/58887/255251
– P_Yadav
Jan 9 at 16:25
1
1
unix.stackexchange.com/q/58887/255251
– P_Yadav
Jan 9 at 16:25
unix.stackexchange.com/q/58887/255251
– P_Yadav
Jan 9 at 16:25
add a comment |
1 Answer
1
active
oldest
votes
This looks like something that could use work. I can only give you a start of an answer:
strace -f -v ls -l /var/opt 2>&1 > /dev/null | perl -ne '/(access|open(?:at)?|statfs|lgetxattr|lstat)(.*?"([^"]+)"/ && !$file$2++ && print "$2n"'
will show you a bunch of filenames accessed. However, that's a woefully incomplete answer; there are over 400 system calls on Linux, and while probably most of them don't access files, there's a lot more than just those few. It's also likely that some of them will require a different pattern to get the file that they access; that regex just looks for the first double-quoted string on the line, and probably some of them have their filename listed at a different point on the line. (If I have it grab the last double-quoted string on the line, it'll grab the selinux contexts as well, which is not what you want.)
Once you have something that returns all of the files accessed, you can then compare that with what you know to be the count of the files in the docker image. (Or you could run something like 'find / -xdev -print|wc' to get it. Note that if you have your docker image mounting things to other places than just /, you would need to list each of those for find to search, since I used -xdev to filter out everything like /proc and /dev that you don't want because they're not real files.)
answered Jan 10 at 4:05
Ed GrimmEd Grimm
1635
add a comment |
Your Answer
StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "106"
;
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: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
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%2funix.stackexchange.com%2fquestions%2f493491%2fprint-percentage-of-files-used-by-a-command%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
This looks like something that could use work. I can only give you a start of an answer:
strace -f -v ls -l /var/opt 2>&1 > /dev/null | perl -ne '/(access|open(?:at)?|statfs|lgetxattr|lstat)(.*?"([^"]+)"/ && !$file$2++ && print "$2n"'
will show you a bunch of filenames accessed. However, that's a woefully incomplete answer; there are over 400 system calls on Linux, and while probably most of them don't access files, there's a lot more than just those few. It's also likely that some of them will require a different pattern to get the file that they access; that regex just looks for the first double-quoted string on the line, and probably some of them have their filename listed at a different point on the line. (If I have it grab the last double-quoted string on the line, it'll grab the selinux contexts as well, which is not what you want.)
Once you have something that returns all of the files accessed, you can then compare that with what you know to be the count of the files in the docker image. (Or you could run something like 'find / -xdev -print|wc' to get it. Note that if you have your docker image mounting things to other places than just /, you would need to list each of those for find to search, since I used -xdev to filter out everything like /proc and /dev that you don't want because they're not real files.)
answered Jan 10 at 4:05
Ed GrimmEd Grimm
1635
add a comment |
This looks like something that could use work. I can only give you a start of an answer:
strace -f -v ls -l /var/opt 2>&1 > /dev/null | perl -ne '/(access|open(?:at)?|statfs|lgetxattr|lstat)(.*?"([^"]+)"/ && !$file$2++ && print "$2n"'
will show you a bunch of filenames accessed. However, that's a woefully incomplete answer; there are over 400 system calls on Linux, and while probably most of them don't access files, there's a lot more than just those few. It's also likely that some of them will require a different pattern to get the file that they access; that regex just looks for the first double-quoted string on the line, and probably some of them have their filename listed at a different point on the line. (If I have it grab the last double-quoted string on the line, it'll grab the selinux contexts as well, which is not what you want.)
Once you have something that returns all of the files accessed, you can then compare that with what you know to be the count of the files in the docker image. (Or you could run something like 'find / -xdev -print|wc' to get it. Note that if you have your docker image mounting things to other places than just /, you would need to list each of those for find to search, since I used -xdev to filter out everything like /proc and /dev that you don't want because they're not real files.)
answered Jan 10 at 4:05
Ed GrimmEd Grimm
1635
add a comment |
This looks like something that could use work. I can only give you a start of an answer:
strace -f -v ls -l /var/opt 2>&1 > /dev/null | perl -ne '/(access|open(?:at)?|statfs|lgetxattr|lstat)(.*?"([^"]+)"/ && !$file$2++ && print "$2n"'
will show you a bunch of filenames accessed. However, that's a woefully incomplete answer; there are over 400 system calls on Linux, and while probably most of them don't access files, there's a lot more than just those few. It's also likely that some of them will require a different pattern to get the file that they access; that regex just looks for the first double-quoted string on the line, and probably some of them have their filename listed at a different point on the line. (If I have it grab the last double-quoted string on the line, it'll grab the selinux contexts as well, which is not what you want.)
Once you have something that returns all of the files accessed, you can then compare that with what you know to be the count of the files in the docker image. (Or you could run something like 'find / -xdev -print|wc' to get it. Note that if you have your docker image mounting things to other places than just /, you would need to list each of those for find to search, since I used -xdev to filter out everything like /proc and /dev that you don't want because they're not real files.)
answered Jan 10 at 4:05
Ed GrimmEd Grimm
1635
This looks like something that could use work. I can only give you a start of an answer:
strace -f -v ls -l /var/opt 2>&1 > /dev/null | perl -ne '/(access|open(?:at)?|statfs|lgetxattr|lstat)(.*?"([^"]+)"/ && !$file$2++ && print "$2n"'
will show you a bunch of filenames accessed. However, that's a woefully incomplete answer; there are over 400 system calls on Linux, and while probably most of them don't access files, there's a lot more than just those few. It's also likely that some of them will require a different pattern to get the file that they access; that regex just looks for the first double-quoted string on the line, and probably some of them have their filename listed at a different point on the line. (If I have it grab the last double-quoted string on the line, it'll grab the selinux contexts as well, which is not what you want.)
Once you have something that returns all of the files accessed, you can then compare that with what you know to be the count of the files in the docker image. (Or you could run something like 'find / -xdev -print|wc' to get it. Note that if you have your docker image mounting things to other places than just /, you would need to list each of those for find to search, since I used -xdev to filter out everything like /proc and /dev that you don't want because they're not real files.)
answered Jan 10 at 4:05
Ed GrimmEd Grimm
1635
answered Jan 10 at 4:05
Ed GrimmEd Grimm
1635
answered Jan 10 at 4:05
Ed GrimmEd Grimm
1635
answered Jan 10 at 4:05
Ed GrimmEd Grimm
1635
1635
add a comment |
add a comment |
Thanks for contributing an answer to Unix & Linux Stack Exchange!
- 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%2funix.stackexchange.com%2fquestions%2f493491%2fprint-percentage-of-files-used-by-a-command%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
1
unix.stackexchange.com/q/58887/255251
– P_Yadav
Jan 9 at 16:25