Pipe commands at each xargs pass












0















Lets say I have this :



echo '/dev/sd'{a..d} | xargs -n 1 lsblk $1


But now I want to pipe each pass of the xargs as for instance :



echo '/dev/sd'{a..b} | xargs -n 1 lsblk $1 | tail -n +2


Now, that does not work obviously, because the pipe is applied to the entire xargs commands. So I might try this :



echo '/dev/sd'{a..b} | xargs -n 1 bash -c "lsblk $1 | tail -n +2"


But the problem is that now $1 has no value inside of the shell.



How can I over come this? Or basically, How can I pipe the execution being done by xargs at each pass?






bash pipe xargs







share|improve this question


















  • 1





    You need to pass the parameter to the shell, like so I believe: echo '/dev/sd'{a..b} | xargs -n 1 bash -c "lsblk $1 | tail -n +2" {}

    – bishop
    Nov 14 '18 at 17:15






  • 5





    Unless echo /dev/sd/{a..b} is just a place holder for some other command, I wouldn't bother with xargs at all here. Just use a loop: for f in /dev/sd{a..b}; do lsblk "$f" | tail -n +2; done. (Even if it is a placeholder, there's probably still a way to avoid xargs.)

    – chepner
    Nov 14 '18 at 17:24








  • 2





    You may use: xargs -I {} bash -c 'lsblk "$1" | tail -n +2' - {} < <(printf '%sn' '/dev/sd'{a..d}) but keep in mind that it will spawn bash subpricess for each entry.

    – anubhava
    Nov 14 '18 at 17:28
















0















Lets say I have this :



echo '/dev/sd'{a..d} | xargs -n 1 lsblk $1


But now I want to pipe each pass of the xargs as for instance :



echo '/dev/sd'{a..b} | xargs -n 1 lsblk $1 | tail -n +2


Now, that does not work obviously, because the pipe is applied to the entire xargs commands. So I might try this :



echo '/dev/sd'{a..b} | xargs -n 1 bash -c "lsblk $1 | tail -n +2"


But the problem is that now $1 has no value inside of the shell.



How can I over come this? Or basically, How can I pipe the execution being done by xargs at each pass?






bash pipe xargs







share|improve this question


















  • 1





    You need to pass the parameter to the shell, like so I believe: echo '/dev/sd'{a..b} | xargs -n 1 bash -c "lsblk $1 | tail -n +2" {}

    – bishop
    Nov 14 '18 at 17:15






  • 5





    Unless echo /dev/sd/{a..b} is just a place holder for some other command, I wouldn't bother with xargs at all here. Just use a loop: for f in /dev/sd{a..b}; do lsblk "$f" | tail -n +2; done. (Even if it is a placeholder, there's probably still a way to avoid xargs.)

    – chepner
    Nov 14 '18 at 17:24








  • 2





    You may use: xargs -I {} bash -c 'lsblk "$1" | tail -n +2' - {} < <(printf '%sn' '/dev/sd'{a..d}) but keep in mind that it will spawn bash subpricess for each entry.

    – anubhava
    Nov 14 '18 at 17:28














0












0








0








Lets say I have this :



echo '/dev/sd'{a..d} | xargs -n 1 lsblk $1


But now I want to pipe each pass of the xargs as for instance :



echo '/dev/sd'{a..b} | xargs -n 1 lsblk $1 | tail -n +2


Now, that does not work obviously, because the pipe is applied to the entire xargs commands. So I might try this :



echo '/dev/sd'{a..b} | xargs -n 1 bash -c "lsblk $1 | tail -n +2"


But the problem is that now $1 has no value inside of the shell.



How can I over come this? Or basically, How can I pipe the execution being done by xargs at each pass?






bash pipe xargs







share|improve this question














Lets say I have this :



echo '/dev/sd'{a..d} | xargs -n 1 lsblk $1


But now I want to pipe each pass of the xargs as for instance :



echo '/dev/sd'{a..b} | xargs -n 1 lsblk $1 | tail -n +2


Now, that does not work obviously, because the pipe is applied to the entire xargs commands. So I might try this :



echo '/dev/sd'{a..b} | xargs -n 1 bash -c "lsblk $1 | tail -n +2"


But the problem is that now $1 has no value inside of the shell.



How can I over come this? Or basically, How can I pipe the execution being done by xargs at each pass?






bash pipe xargs




bash pipe xargs






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Nov 14 '18 at 17:12









Matias BarriosMatias Barrios

1,547317




1,547317








  • 1





    You need to pass the parameter to the shell, like so I believe: echo '/dev/sd'{a..b} | xargs -n 1 bash -c "lsblk $1 | tail -n +2" {}

    – bishop
    Nov 14 '18 at 17:15






  • 5





    Unless echo /dev/sd/{a..b} is just a place holder for some other command, I wouldn't bother with xargs at all here. Just use a loop: for f in /dev/sd{a..b}; do lsblk "$f" | tail -n +2; done. (Even if it is a placeholder, there's probably still a way to avoid xargs.)

    – chepner
    Nov 14 '18 at 17:24








  • 2





    You may use: xargs -I {} bash -c 'lsblk "$1" | tail -n +2' - {} < <(printf '%sn' '/dev/sd'{a..d}) but keep in mind that it will spawn bash subpricess for each entry.

    – anubhava
    Nov 14 '18 at 17:28














  • 1





    You need to pass the parameter to the shell, like so I believe: echo '/dev/sd'{a..b} | xargs -n 1 bash -c "lsblk $1 | tail -n +2" {}

    – bishop
    Nov 14 '18 at 17:15






  • 5





    Unless echo /dev/sd/{a..b} is just a place holder for some other command, I wouldn't bother with xargs at all here. Just use a loop: for f in /dev/sd{a..b}; do lsblk "$f" | tail -n +2; done. (Even if it is a placeholder, there's probably still a way to avoid xargs.)

    – chepner
    Nov 14 '18 at 17:24








  • 2





    You may use: xargs -I {} bash -c 'lsblk "$1" | tail -n +2' - {} < <(printf '%sn' '/dev/sd'{a..d}) but keep in mind that it will spawn bash subpricess for each entry.

    – anubhava
    Nov 14 '18 at 17:28








1




1





You need to pass the parameter to the shell, like so I believe: echo '/dev/sd'{a..b} | xargs -n 1 bash -c "lsblk $1 | tail -n +2" {}

– bishop
Nov 14 '18 at 17:15





You need to pass the parameter to the shell, like so I believe: echo '/dev/sd'{a..b} | xargs -n 1 bash -c "lsblk $1 | tail -n +2" {}

– bishop
Nov 14 '18 at 17:15




5




5





Unless echo /dev/sd/{a..b} is just a place holder for some other command, I wouldn't bother with xargs at all here. Just use a loop: for f in /dev/sd{a..b}; do lsblk "$f" | tail -n +2; done. (Even if it is a placeholder, there's probably still a way to avoid xargs.)

– chepner
Nov 14 '18 at 17:24







Unless echo /dev/sd/{a..b} is just a place holder for some other command, I wouldn't bother with xargs at all here. Just use a loop: for f in /dev/sd{a..b}; do lsblk "$f" | tail -n +2; done. (Even if it is a placeholder, there's probably still a way to avoid xargs.)

– chepner
Nov 14 '18 at 17:24






2




2





You may use: xargs -I {} bash -c 'lsblk "$1" | tail -n +2' - {} < <(printf '%sn' '/dev/sd'{a..d}) but keep in mind that it will spawn bash subpricess for each entry.

– anubhava
Nov 14 '18 at 17:28





You may use: xargs -I {} bash -c 'lsblk "$1" | tail -n +2' - {} < <(printf '%sn' '/dev/sd'{a..d}) but keep in mind that it will spawn bash subpricess for each entry.

– anubhava
Nov 14 '18 at 17:28












0






active

oldest

votes











Your Answer






StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");

StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
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
});


}
});














draft saved

draft discarded


















StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53305495%2fpipe-commands-at-each-xargs-pass%23new-answer', 'question_page');
}
);

Post as a guest















Required, but never shown

























0






active

oldest

votes








0






active

oldest

votes









active

oldest

votes






active

oldest

votes
















draft saved

draft discarded




















































Thanks for contributing an answer to Stack Overflow!


  • 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.




draft saved


draft discarded














StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53305495%2fpipe-commands-at-each-xargs-pass%23new-answer', 'question_page');
}
);

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







-

Popular posts from this blog

Florida Star v. B. J. F.

Image
Florida Star v. B. J. F. From Wikipedia, the free encyclopedia Jump to navigation Jump to search United States Supreme Court case Florida Star v. B. J. F. Supreme Court of the United States Argued March 21, 1989 Decided June 21, 1989 Full case name The Florida Star v. B. J. F. Citations 491 U.S. 524 ( more ) 109 S. Ct. 2603; 105 L. Ed. 2d 443; 1989 U.S. LEXIS 3120; 57 U.S.L.W. 4816; 16 Media L. Rep. 1801 Prior history The Florida Star v. B.J.F., 530 So.2d 286 (1988) Supreme Court of Florida; Florida Star v. B.J.F., 499 So.2d 883 (1986) Fla. Dist. Court of Appeals Holding Florida Stat. § 794.03 is unconstitutional to the extent it makes the truthful reporting of information that was a matter of public record unlawful, as it violates the First Amendment. Court membership Chief Justice William Rehnquist Associate Justices William J. Brennan Jr.  · Byron White Thurgood Marshall  · Harry Blac
Read more

Error while running script in elastic search , gateway timeout

Image
0 while running script in elastic search, I got 504 Gateway timeout error. { "query": { "bool": { "filter": { "script": { "script": " doc['creted_date'].date.getMonthOfYear() == 12 " } } } }, "aggs": { "test": { "date_histogram": { "field": "creted_date", "interval": "month", "format": "MMM" }, "aggs": { "cost": { "sum": { "field": "cost" } } }
Read more

Adding quotations to stringified JSON object values

Image
0 My stringified object data doesn't include quotation marks around object values, which errors when attempting JSON.parse() : '{ "affiliation": CORPORATE, "userId": 75c35d1c-5d12-4485-8fa8-b2f1551a3e6e }' I need the string to be: '{ "affiliation": "CORPORATE", "userId": "75c35d1c-5d12-4485-8fa8-b2f1551a3e6e" }' I'm using this regex to add quotes to the object keys: var newStr = str.replace(/(['"])?([a-z0-9A-Z_]+)(['"])?:/g, '"$2": '); For instance: '{ affiliation: CORPORATE }' to '{ "affiliation": CORPORATE }' There are only string values in my data, so I don't need to check value types. How can I alter my regex expression to add quotations to
Read more