bash$ echo >(true) /dev/fd/63 bash$ echo <(true) /dev/fd/63

This site is not affiliated with Linus Torvalds or The Open Group in any way. Not the answer you're looking for? more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed I have found that on gentoo also if sh is a link to /bin/bash if you call the script with 'sh "scriptname"' it doesn't run it as a bash script and this contact form

The list is given a name either by connecting the list to named pipe or by using a file in /dev/fd (if supported by the O/S). echo; echo "##########"; echo # And likewise . . . Video displays in Star Wars Can filling up a 75 gallon water heater tank without opening a faucet cause damage? exit $?

This is a similar example.

Example 23-2.

Bash Process Substitution Syntax Error Near Unexpected Token

Unless /bin/sh is Bash or some other shell which supports process substitution, that syntax is indeed not supported, as pointed out by @MarkPlotnick. By doing this, the command simply sees a file name and is unaware that its reading from or writing to a command pipeline. For example, given the two files: # cat a e d c b a # cat b g f e d c b To view the lines unique to each of

Limit involving exponentials and arctangent without L'Hôpital Why does Windows show "This device can perform faster" notification if I connect it clumsily? no outgoing connection via ipv4 What could cause the throttle to stick in my Ford Ranger? contact | privacy policy | terms of use © 2014-15 recalll × Modal header Body... Bash Syntax Error Near Unexpected Token Else' because it runs in a subshell.

Same calling by ./script.sh executes with sha-bang which is /bin/bash in your script. Syntax Error Bad Substitution Intuition behind Harmonic Analysis in Analytic Number Theory What is the sh -c command? Is the following extension of finite state automata studied? up vote 1 down vote favorite My friend asked me why this two simple script are not working in both shells: Test File "abc.txt": aaa 111 bbb 111 ccc 111 ddd

done < <(sort list1) echo "$i lines processed"The difference between <(...) and >(...) is merely which way the redirections are done. Bash Syntax Error Near Unexpected Token Fi' The stdin of true> connects to fOut (dup2(fOut, 0)), then Bash passes a /dev/fd/fIn argument to echo. My home country claims I am a dual national of another country, the country in question does not. no outgoing connection via ipv4 Do COB LEDs usually need electrically insulating from the heatsink?

Syntax Error Bad Substitution

Why write an entire bash script in functions? Although not documented as a form of input/output redirection, its syntax and its effects are similar. Bash Process Substitution Syntax Error Near Unexpected Token Adopt A Jet/Book What to tell to a rejected candidate? Syntax Error In Substitution Sap At first process substitution may seem rather pointless, for example you might imagine something simple like: uniq <(sort a) to sort a file and then find the unique lines in it,

Login to save this as favorite View the discussion thread. weblink What does Sauron need with mithril? Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the Depending on your actual problem these options may be open to you: # If commandA can read the data from stdin commandB | commandA # You can now get the exit Bash Syntax Error Near Unexpected Token Done'

linux - Syntax error in shell script with process substitution - Stack... current community chat Stack Overflow Meta Stack Overflow your communities Sign up or log in to customize your list. From Bash's behaviour [Bash Hackers Wiki]: SH mode When Bash starts in SH compatiblity mode, it tries to mimic the startup behaviour of historical versions of sh as closely as possible, navigate here In fact you can continue to type a whole script in that side as well.

Which requires more energy: walking 1 km or cycling 1 km at the same speed? Bash Syntax Error Invalid Arithmetic Operator Forward/right bracket vs backward/left bracket2Read a password securely from within process substitution?2What are the variables $remote_fs and $syslog on SysVinit LSB header? On THE other hand or on another hand?

Space there would give an error message.

bash$ echo >(true) /dev/fd/63 bash$ echo <(true) /dev/fd/63

Process substitution 3.4.7. Why did companions have such high social standing? To substitute a command pipeline for an output file the syntax is: command ... >(list) ... Bash Syntax Error Near Unexpected Token Then' Sort of...

Password Protected Wifi, page without HTTPS - why the data is send in clear text? I used a template I got online to create it. because it does NOT run in a subshell. his comment is here How could banks with multiple branches work in a world without quick communication?

done echo "$i lines processed" # Always prints 0But this works: # Working example, using bash syntax. Process substitution isn't specified by POSIX. Thank You so much for the response...Just want to know why it is different while executing the same script using sh file.sh and ./file.sh ?? –Sudev Jash Nov 17 '14 at Train ride from Copenhagen to Malmo Realism of a setting with several sapient anthropomorphic animal species Subtraction with a negative result Convince people not to share their password with trusted others

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It seems that POSIX is not enabled on the node where the job was submitted. Can Customs make me go back to return my electronic equipment or is it a scam? Using Map to convert Feet + Inches to Inches in a List of Lists How to indicate you are going straight? sure does!

If it's not a login shell, the environment variable ENV is evaluated and the resulting filename is taken as name of the startup file. Same calling by ./script.sh executes with sha-bang which is /bin/**bash** in your script. –Costas Nov 17 '14 at 18:12 @SudevJash see: What is the difference between ./ and sh Each form either causes a FIFO to be created under /tmp or /var/tmp, or uses a named file descriptor (/dev/fd/*), depending on the operating system. Of course, note that all shells may not support process substitution, these examples will work with bash. ______________________ Mitch Frazier is an Associate Editor for Linux Journal.

Unix & Linux Stack Exchange works best with JavaScript enabled current community chat Unix & Linux Unix & Linux Meta your communities Sign up or log in to customize your list. Rosa Parks is a [symbol?] for the civil rights movement? Is the empty set homeomorphic to itself? shell-script services init.d process-substitution case share|improve this question asked Jan 7 '15 at 21:03 TCZ8 4441516 2 Not all shells support <(...), since it's a nonstandard extension.

Natural construction When taking passengers, what should I do to prepare them? Related 6How do the environments of a standard Terminal command-line and a bash script differ?4Why does “if [ 0 ]” execute the “then” statement in bash script?1Sendmail not working as desired more hot questions question feed lang-sh about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation