Error when running OSUnixSubprocess - posix_spawn() error
Greetings Pharoers! I have following problem when using OSSubprocess library. If I run a method that uses code below, it fails: Error: Error: posix_spawn(), code: 9, description: Bad file descriptor Any thoughts, hints are welcome! My code redirects stdout, stdin in order to catch system outputs from inside of Pharo. ``` Subprocess code does following: OSUnixSubprocess>>runAndWaitWithStdOutput ``` ``` self ``` ``` redirectStdout; ``` ``` redirectStderr; ``` ``` runAndWaitOnExitDo: [ :termProcess :outString :errString | ``` ``` termProcess isSuccess ``` ``` ifTrue: [ ^ outString ] ``` ``` ifFalse: [ "commands to handle ex message here" ] ] ``` ``` Now if I run, it fails: Error: Error: posix_spawn(), code: 9, description: Bad file descriptor OSSUnixSystemAccessor(Object)>>error: OSSUnixSystemAccessor>>strerror:message: OSSUnixSubprocess>>internalRun [ self internalRun ] in OSSUnixSubprocess>>run in Block: [ self internalRun ] BlockClosure>>ensure: OSSUnixSubprocess>>run OSSUnixSubprocess>>runAndWaitOnExitDo: OSSUnixSubprocess>>runAndWaitWithStdOutput ... .. . PhLImageProcessListCliCommand(PhLCliCommand)>>executeOSShellCommand So it seems that OSUnixSubprocess uses some file that remains opened probably in OS? Command that is passed to OSSubprocess is generated by args: ^ Array with: 'echo' with: '-n' with: ('$(pgrep -a -f Pharo | grep ''.image'' | grep -v ''.bash''| grep -v {1})' format: {self currentVMPid asString}) ```
Hi David, What is the function that is actually failing? I would assume itâs something called in #internalRun. I assume you have tried executing the process from the command line (quick check I always do when finding these kind of problems :P). $ echo -n $(pgrep -a -f Pharo | grep ''.image'' | grep -v ''.bash''| grep -v XXX) G
El 4 feb 2022, a las 17:48, bajger@gmail.com escribió:
Greetings Pharoers!
I have following problem when using OSSubprocess library. If I run a method that uses code below, it fails: Error: Error: posix_spawn(), code: 9, description: Bad file descriptor
Any thoughts, hints are welcome!
My code redirects stdout, stdin in order to catch system outputs from inside of Pharo.
Subprocess code does following: OSUnixSubprocess>>runAndWaitWithStdOutput self redirectStdout; redirectStderr; runAndWaitOnExitDo: [ :termProcess :outString :errString | termProcess isSuccess ifTrue: [ ^ outString ] ifFalse: [ "commands to handle ex message here" ] ]
Now if I run, it fails:
Error: Error: posix_spawn(), code: 9, description: Bad file descriptor OSSUnixSystemAccessor(Object)>>error: OSSUnixSystemAccessor>>strerror:message: OSSUnixSubprocess>>internalRun [ self internalRun ] in OSSUnixSubprocess>>run in Block: [ self internalRun ] BlockClosure>>ensure: OSSUnixSubprocess>>run OSSUnixSubprocess>>runAndWaitOnExitDo: OSSUnixSubprocess>>runAndWaitWithStdOutput ... .. . PhLImageProcessListCliCommand(PhLCliCommand)>>executeOSShellCommand
So it seems that OSUnixSubprocess uses some file that remains opened probably in OS? Command that is passed to OSSubprocess is generated by args: ^ Array with: 'echo' with: '-n' with: ('$(pgrep -a -f Pharo | grep ''.image'' | grep -v ''.bash''| grep -v {1})' format: {self currentVMPid asString})
Hi Guille, Thanks for your reply! The problem is not permanent, so I cannot reproduce now :( It usually happens (not always) with fresh image of launcher (after loading Launcher project). Is seems that some file keeps hanging that causes that error. I will confirm if evaluating command directly produce same error, if I will experience this again.
participants (2)
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bajger＠gmail.com -
Guillermo Polito