I want to append found directories to array.
#!/bin/bash
FILES=()
find . ! \( \( -path './android/out' -o -path './.repo' \) -prune \) -type d -name prebuilts | while read file; do
echo "FILES -->$file"
FILES+=("$file")
done
echo "num of FILES: ${#FILES[#]}"
echo "FILES: ${FILES[#]}"
but result as below:
FILES -->./android/test/vts/prebuilts
FILES -->./android/system/apex/shim/prebuilts
FILES -->./android/system/sepolicy/prebuilts
FILES -->./android/vendor/tvstorm/prebuilts
FILES -->./android/vendor/dmt/prebuilts
FILES -->./android/kernel/prebuilts
FILES -->./android/prebuilts
FILES -->./android/developers/build/prebuilts
FILES -->./android/external/selinux/prebuilts
FILES -->./android/development/vndk/tools/header-checker/tests/integration/version_script_example/prebuilts
num of FILES: 0
FILES:
Why does num of array is 0?
You are populating the array after |, i.e. in a subshell. Changes from the subshell don't propagate to the parent shell.
Use process substitution instead:
while read file; do
echo "FILES -->$file"
FILES+=("$file")
done < <(find . ! \( \( -path './android/out' -o -path './.repo' \) -prune \) -type d -name prebuilts)
If you don't need job control, you can also shopt -s lastpipe to run the last command in a pipeline in the current shell.
Related
#!/bin/bash
n=0
for f in *; do
[[ -f "$f" ]] && { echo "$f"; ((n++)); }
done
echo :Number of empty files: $n"
currently it checks the current directory for empty files, I would like it to search for empty files in any directory. Any ideas?
Recursively searches for empty files in current directory and below:
find . -empty -type f
Recursively lists empty files in specified directory and below and reports total
findempty
#!/bin/bash
echo :Number of empty files: `find $1 -empty -type f | tee /dev/tty | wc -l`
Example Usage
findempty /tmp
Example Output
/tmp/source/fb/b
/tmp/source/fb/a
/tmp/source/fb/c
/tmp/source/fa/b
/tmp/source/fa/a
/tmp/source/fa/c
/tmp/source/fc/b
/tmp/source/fc/a
/tmp/source/fc/c
/tmp/dest/source/fb/b
/tmp/dest/source/fa/b
/tmp/dest/source/fc/b
:Number of empty files: 12
I have the following code which creates an array and iterate over a directory and create a subdirectory under each of the element of an array.
#!/bin/bash
cd /var/www
dirs=$(find * -maxdepth 0 -type d)
for dir in "${dirs[#]}"; do
echo $dir
mkdir $dir/backups
done
While it echo's all the directories, it creates a directory only on the last element of the array. What can be the issue?
If you are on bash 4.4 particularly , you can use the readarray feature like bellow. Also using -maxdepth 0 seems not a good option - you probably need to use -maxdepth 1.
#!/bin/bash
cd /var/www
readarray -t -d'' dirs < <$(find . -maxdepth 1 -type d -print0)
for dir in "${dirs[#]}"; do
echo $dir
mkdir $dir/backups
done
But in case you can do the whole thing just with find and mkdir -v (verbose):
$ find . -maxdepth 1 -type d -name 'a*'
./appsfiles
$ find . -maxdepth 1 -type d -name 'a*' -exec mkdir -v {}/backup \;
mkdir: created directory './appsfiles/backup'
Using mkdir -v you get verbose messages from mkdir and you can skip the echo.
If you need the echo anyway, you can do it like:
$ find . -maxdepth 1 -type d -name 'a*' -exec bash -c 'echo $0 && mkdir -v $0/backup' {} \;
./appsfiles
mkdir: created directory './appsfiles/backup'
The issue the array initialization - change it to:
dirs=($(find * -maxdepth 0 -type d))
However, the above statement can be problematic if you have directories that have white spaces in them.
You can use a simple glob instead - it handles white spaces too:
cd /var/www
dirs=(*/)
for dir in "${dirs[#]}"; do
: your code
done
I've written the following shell script to compile and execute a c program and then to do some other operations.
#!/bin/sh
#
#FIRST SCRIPT
#
clear
echo "-----STARTING COMPILATION-----"
#echo $1
name=$1
#echo $name
find . -iname $name -maxdepth 1 -exec cp {} $name \;
new_file="tempwithfile.adb"
cp $name $new_file
cp $name1 $name
echo "compiling"
dir >filelist.txt
gcc writefile.c
run_file="run_file.txt"
echo $name > $run_file
./a.out
echo ""
echo "cleaning"
echo ""
make clean
make -f makefile
Can I stop the execution of the shell script if a particular condition is met in the c program? For e.g, if I am searching for a file from the program and i didn't find it, then I don't have to execute the rest of the shell script. Is it possible?
As Manül said, you need to return a value from the main() function in the C code.
Then you can do this in the script:
./a.out
if [ $? -ne 0 ]
...
How would I iterate through folders with a .ps1 file? I have
C:\inetpub\wwwroot\apple\login.aspx
C:\inetpub\wwwroot\orange\login.aspx
C:\inetpub\wwwroot\banana\login.aspx
C:\inetpub\wwwroot\pear\login.aspx
I just came across this example:
# PowerShell Foreach File Example
Clear-Host
$Path = "C:\Windows\System32\*.dll"
Get-ChildItem $Path | Foreach-Object {
Write-Host $_.Name
}
So I would do:
# PowerShell Foreach File Example
Clear-Host
$Path = "C:\Windows\System32\*.dll" //here is where I'm not sure of what to do
Get-ChildItem $Path | Foreach-Object {
//insert stuff
}
In my "not sure of what to do" comment how would I change it so it would loop through different sub-directories of windows?
I'm 90% sure that the Recurse parameter is available on Powershell 1. So
ls c:\windows\system32 -Recurse -Include *.dll
ls and dir are both aliases for Get-ChildItem
For example, cd (echo ..) works in powershell, but how do I get it working in batch (it evaluates the echo first, and so the command is effectively cd ..)? mycommand.exe (ls -fi *.hs -exclude \"#*\" -name -r) is what I'm actually trying to convert (it sends a, completed, filtered file listing to mycommand).
setlocal enabledelayedexpansion
set LIST=
for /r %%F in (*.hs) do (
set "FN=%%F"
if not "!FN:~0,1!"=="#" set LIST=!LIST! "%%F"
)
mycommand.exe !LIST!
would be a rough translation.
add the $ symbol to evaluate the commands in the parens first:
mycommand.exe $(ls -fi *.hs -exclude \"#*\" -name -r)
or
ls -fi *.hs -exclude \"#*\" -name -r | mycommand.exe
If you want to execute the command for each item returned from your ls, you can:
ls -fi *.hs -exclude \"#*\" -name -r | %{mycommand.exe $_ }