sh

问题 So I have this code: find cobacoba -type f | xargs -n 5 bash -c 'a=(${0} ${1} ${2} ${3} ${4}); echo "File #: ${a[*]}";' Hoping Result: File #: cobacoba/1.3 cobacoba/1.6 cobacoba/1.q cobacoba/1.5 File #: cobacoba/1.1 cobacoba/1.q2 cobacoba/1.q23 cobacoba/1.4 File #: cobacoba/1.2 I would like to replace # with counter, like 1, 2, 3, so on... 回答1: You can postprocess your output with awk to replace # with the line number: find cobacoba -type f | xargs -n 5 bash -c 'a=(${0} ${1} ${2} ${3} ${4});

问题 I want to find all git repositories lying in some directory, but not its subdirectories, say ~/repo . Two simple approaches are find ~/repo -depth 2 -type d -name '.git' | while read repo … or for repo in ~/repo/*/.git … The version using find is magnitudes slower than the one with the globbing pattern. I am very surprised by this, because there is no real reason why one method would need more system calls than the other to gather its informations. I tried a smarter version of the find

问题 I want to redirect (stdout,stderr) from one process to (stdin,file descriptor 3) of another. How do I do that? For example, if I have myscript.sh : #!/bin/sh # myscript.sh echo "stdout" echo "stderr" >&2 And reader.sh : #!/bin/sh # reader.sh read key echo "stdin: $key" read key <&3 echo "fd3: $key" How do I pipe the output of myscript.sh to reader.sh such that the final output is: stdin: stdout fd3: stderr The closest I've gotten is: ./myscript.sh 2>&3 | ./reader.sh But that hangs waiting for

问题 Do functions not exist in the sh shell? I am trying to convert a bash script to also run in sh and I'm having trouble dumbing down the code. Without functions and arrays, its become difficult to replicate the scripts functionality. Ideally I want to write one script that will run in either shell, not two slightly similar scripts. 回答1: There are functions in sh , but the function keyword is missing. Define your functions as frobnicate () { # .... } With arrays, you are out of luck. 来源： https:/

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed last year . I have a shell script that uses Wikidata Query Service (WDQS) to get required data. The SPARQL query that run WDQS takes input parameter language code. Is there a way that I can check in shell script if the input language code is a valid Wikimedia language code as the first column data in below link https://www

问题 Please if I run the command # CREATE TRASH FOLDER if ! [ -d "$HOME/deleted" ] ; then mkdir $HOME/deleted fi TRASH=$HOME/deleted mv $@ $TRASH To move file or directory to the trash created. what is the possible command i can run to recover same file to the original directory 回答1: If you create a deleted directory like this, you will probably get some unexpected behavior. For example: rm_script test.txt cd ../other_directory rm_script test.txt will create a single file test.txt with the content

问题 Inside the function of a shell script I see something like this func() { local x x=${1:3:1} ... } What does x=${1:3:1} mean? I know that $1 , $2 and $3 are arguments of the function. So does the above statement mean that x = $1:$2:$3 ? Also, it is really helpful if someone can suggest on how do I google search for speacial characters like this? Any standard keywords? I tried searching 'what is ":" in shell scripts' etc.. But the results are random when trying to search for special characters.

问题 I have one input file, I need to read and apply some condition and route to two other files. 100 COMPANY Records 500ABC COMPANY 345 2pen9999out 2cow7777out 2goa7777out 500ABC COMPANY IN 456 2car9999out 2cow7777out 2HAT7777out 2BAL9999out 2BAL6666out here, record start with 5 was header and 2 was detail i need to create two file ABC_COMPANY.txt and ABC_COMPANY_IN.txt ? I have written below logic, which I want to convert using awk or other right approach? NUMBER1="666" NUMBER2="777" while read

问题 I want to do something to every file in a directory, so I have for f in /path/* /path/.*; do [ -e "$f" ] || continue do_thing "$f" done Unfortunately, this also matches . and .. , which is undesirable in this case. How can I avoid matching . and .. ? 回答1: To run do_thing on every file in the current directory, try: find /path -maxdepth 1 -type f -exec do_thing {} \; This method avoids looping and avoids parsing ls . How it works find /path This starts a find command and tells find to look in

问题 I have a file paths.txt : /my/path/Origin/.:your/path/Destiny/. /my/path/Origin2/.:your/path/Destiny2/. /... /... I need a Script CopyPaste.sh using file paths.txt to copy all files in OriginX to DestinyX Something like that: #!/bin/sh while read line do var= $line | cut --d=":" -f1 car= $line | cut --d=":" -f2 cp -r var car done < "paths.txt" 回答1: Use translate : tr command & apply cp command in the same go! #!/bin/sh while read line; do cp `echo $line | tr ':' ' '` done < "paths.txt" 回答2: