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Bash Process Substitution Syntax Error

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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 When you do this, you can get commandB's exit code from $? What does an 'ü' mean? when using diff(1): diff <(sort list1) <(sort list2)This is (roughly) equivalent to: mkfifo /var/tmp/fifo1 mkfifo /var/tmp/fifo2 sort list1 >/var/tmp/fifo1 & sort list2 >/var/tmp/fifo2 & diff /var/tmp/fifo1 /var/tmp/fifo2 rm /var/tmp/fifo1 /var/tmp/fifo2Note that

Bash Process Substitution Syntax Error Near Unexpected Token

which is why your sh script is failing, as the <(..) syntax is using process substitution. commandB > >(commandA) # You can now get the exit code of commandB from $? (or by putting this in an if) # If commandA cannot read it from stdin, but For example, this will fail: # This example will fail, unless run in ksh88/ksh93 i=0 sort list1 | while read line; do i=$(($i + 1)) ... Code block redirection without forking

#!/bin/bash # wr-ps.bash: while-read loop with process substitution. # This example contributed by Tomas Pospisek. # (Heavily edited by the ABS Guide author.) echo echo

Search: Login ProcessSubstitution BashGuideBashFAQRecentChangesFindPageHelpContentsProcessSubstitution Edit (Text)CommentsInfoAttachments More Actions: Raw Text Print View Render as Docbook Delete Cache ------------------------ Check Spelling Like Pages Local Site Map ------------------------ Rename Page Delete Page ------------------------ 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. See also: role of shebang at unix.SE share|improve this answer edited Aug 16 '15 at 19:34 answered Aug 16 '15 at 19:25 Andras Deak 11k32048 I used sh file.sh... Bash Syntax Error Near Unexpected Token Else' Adding a !#/bin/bash to your script may help (but I'm not as familiar with cron as I should be, and have no direct experience with Debian). –chepner Aug 25 '12 at

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. Syntax Error Bad Substitution Activate Hearthstone season chest cards? Can filling up a 75 gallon water heater tank without opening a faucet cause damage? because it does NOT run in a subshell.

And when you finally check out, you’re offered the ability to pay with promo codes, gifts cards, PayPal or a variety of credit cards. Bash Syntax Error Near Unexpected Token Fi' share|improve this answer edited Nov 18 '14 at 14:21 answered Nov 17 '14 at 18:28 Costas 10.6k523 @MichaelDurrant Ah, your modification now means the opposite of what I meant echo; echo "##########"; echo # And likewise . . . Browse other questions tagged bash shell-script process-substitution or ask your own question.

Syntax Error Bad Substitution

I used a template I got online to create it. 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 Bash Process Substitution Syntax Error Near Unexpected Token I shall test and report! :) –TCZ8 Jan 7 '15 at 21:38 It works! Syntax Error In Substitution Sap Meaning of Guns and ghee Adopt A Jet/Book Train ride from Copenhagen to Malmo The Woz Monitor Can filling up a 75 gallon water heater tank without opening a faucet cause

Password Protected Wifi, page without HTTPS - why the data is send in clear text? http://gatoisland.com/syntax-error/bash-if-syntax-error.php Adopt A Jet/Book What to tell to a rejected candidate? The syntax for process substitution is: <(list) or >(list) where each list is a command or a pipeline of commands. My home country claims I am a dual national of another country, the country in question does not. Bash Syntax Error Near Unexpected Token Done'

nothing echoes. done < <( echo "random input" ) # ^ ^ echo "\$global (using process substitution) = $global" # Random input # $global (using process substitution) = 3D: Available outside the loop. The stdin of true connects to fOut (dup2(fOut, 0)), then Bash passes a /dev/fd/fIn argument to echo. http://gatoisland.com/syntax-error/bash-command-substitution-syntax-error-near-unexpected-token.php Always invoke bash by name if you use bash features.

done echo "\$global (from outside the subprocess) = $global" # $global (from outside the subprocess) = echo; echo "--"; echo while read i do echo $i global=3D": Available outside the loop." Bash Syntax Error Invalid Arithmetic Operator Meaning of Guns and ghee Verbs of buttons on websites Skeletal formula for carbon with two double bonds Skipping directly to level 4 Good way to explain fundamental theorem of arithmetic? So, in the example above the shell tries to parse the process substitution syntax before the "set" command is executed and therefore still sees the process substitution syntax as illegal.

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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 The effect of process substitution is to make each list act like a file. declare -a inloop index=0 cat $0 | while read line do inloop[$index]="$line" ((index++)) # It runs in a subshell, so ... Bash Syntax Error Near Unexpected Token Then' 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

Take care to invoke your script with an explicit #!/bin/bash line. #!/bin/sh won't do, even if /bin/sh is a symbolic link to bash, because bash runs in POSIX mode if it's With <(...) one is expected to read from the substitution, and the command is set up to use it as stdout. On systems lacking /dev/fd/ files, Bash may use temporary files. (Thanks, S.C.)

Process substitution can compare the output of two different commands, or even the http://gatoisland.com/syntax-error/bash-for-syntax-error.php Sep 28, 2016 Free Today: September Issue of Linux Journal (Retail value: $5.99) Sep 27, 2016 nginx Sep 27, 2016 more Linux Journal October 2016 The Tiny Internet Project, Part I

done echo "$i lines processed" # Always prints 0But this works: # Working example, using bash syntax. Alternatively, don't use this bash-specific syntax; use a portable construct such as the one proposed by Stephane Rouberol. To substitute a command pipeline for an input file the syntax is: command ... <(list) ... If you change the first line to #!/bin/bash, does it work? –Mark Plotnick Jan 7 '15 at 21:06 Wow...

Note that the actual command can be a pipeline. 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 Browse other questions tagged bash scripts or ask your own question. With >(...) one is expected to write to the substitution, and the command inside is set up to use it as stdin. >(...) is used less frequently; the most common situation

Here's a more complicated example: hasFile='Note: the (top-|highly )?secret plans are backed up at:(.*)' criticalFile= while IFS= read -r line; do [[ $line ]] || continue case $line in '!!! '*) At first process substitution may seem rather pointless, for example you might imagine something simple like: uniq <(sort a) to sort a file and then find the unique lines in it, declare -a array0 while read do array0[${#array0[@]}]="$REPLY" done < <( sed -e 's/bash/CRASH-BANG!/' $0 | grep bin | awk '{print $1}' ) # Sets the default 'read' variable, $REPLY, by process Is this safe to display MySQL query error in webpage if something went wrong?

Skip to Navigation Click to subscribe Login Bash Process Substitution May 22, 2008 ByMitch Frazier inHOW-TOs In addition to the fairly common forms of input/output redirection the shell recognizes something called Check this Out Similar queries 3.4.7. Get the Guide October 2016 Video Preview September 2016 Video Preview August 2016 Video Preview Click here for more videos First Name Last Name Address 1 Address 2 City State Zip

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