Hixie changed the title flock 3: Bad file descriptor Can't run Flutter on NFS (flock reports "Bad file descriptor") Dec 20, 2017. An attempt to lock the file using one of these file descriptors may be denied by a lock that the calling process has already placed via another file descriptor. I'm not sure what a proper fix would be, not being an expert in the use of flock.The problem seems to be that NFS doesn't support exclusive locking on a file descriptor opened in read-only mode, because it wants to write in order to lock the file.Successfully merging a pull request may close this issue.After a long vacation, I've confirmed that using 'flock 3 || true' works on
Code review; Project management; Integrations; Actions; Packages; Security may be this will provide a way to keep the stream clean. Unless I disable the lock, in which case it works fine.This is free software; you are free to change and redistribute it.Can you add the indicated line below to your flutter shell script in the indicated position and tell me everything that prints when you run This is free software; you are free to change and redistribute it.It just occurred to me that this is in an NFS-mounted directory, and I know NFS has some differences in locking.
We could just ignore errors from flock, I guess... if you replace the flock Subsequent flock() calls on an already locked file will convert an existing lock to the new lock mode. Hixie self-assigned this Dec 20, 2017. Reply to this email directly, view it on GitHub UNLOCK SOLUTION My current fix is to edit bin/flutter to change 'if hash flock...' to have a misspelling in flock, so that it doesn't use flock, which fails on nfs. Possible workaround in #13955. Experts Exchange always has the answer, or at the least points me in the correct direction! I can make flutter work fine by changing the preceding line such that the if statement fails and a lock is not taken.I presume file descriptor 3 is supposed to be created by line 50, which reads:but don't care to learn enough bash to figure out why it is not working, particularly as I have a workaround.
Can't run Flutter on NFS (flock reports "Bad file descriptor") It is like having another employee that is extremely experienced. Deciding to stick with EE. ***> wrote: Any ideas? (No credit card required) You are receiving this because you authored the thread. don't know how much this helps but try to synchronize the way "is" is manipulated. If a process uses open(2) (or similar) to obtain more than one file descriptor for the same file, these file descriptors are treated independently by flock(). Being involved with EE helped me to grow personally and professionally. Why GitHub? Most are zero length, but a couple of them have an old version of a Formula. The first and second forms wraps the lock around the executing a command, in a manner similar to su(1) or newgrp(1).It locks a specified file or directory, which is created (assuming appropriate permissions), if it … We've partnered with two important charities to provide clean water and computer science education to those who need it most. Gain unlimited access to on-demand training courses with an Experts Exchange subscription. Connect with Certified Experts to gain insight and support on specific technology challenges including:
Thanks for figuring this out!On Tue, Dec 19, 2017 at 5:43 PM Ian Hickson ***@***. This is on a debian stable computer, and I have no experience using flock with bash, and haven't been able to debug it. Flutter works fine in /tmp, which is tmpfs. Re: bad file descriptor 807599 Apr 4, 2007 3:02 PM ( in response to 807599 ) hi, it seems the "is" is corrupted at times.
*This site is protected by reCAPTCHA and the Google This commit was created on GitHub.com and signed with a https://www.experts-exchange.com/questions/20737559/Bad-file-descriptor.html UNLOCK SOLUTION Unlock this solution and get a sample of our free trial. (No credit card required) That .cache folder contains lots of .brewing files. An attempt to lock the file using one of these file descriptors may be denied by a lock that the calling process has already placed via another descriptor. So I guess maybe you can somehow identify that NFS is in use and avoid flock in that case?I agree that NFS and locking don't do well, but I wouldn't have expected "Bad file descriptor"...Any chance that a fix for this could go in, so I could use flutter in my home directory over nfs? A process may only hold one type of lock (shared or exclusive) on a file. from the expert community at Experts Exchange NFS. That is what the “exec 200>” portion of the script is doing. This utility manages flock(2) locks from within shell scripts or the command line.. GitHub is home to over 50 million developers working together to host and review code, manage projects, and build software together.By clicking “Sign up for GitHub”, you agree to our I expect you may have difficulty reproducing this, but I run into the following error when running flutter:The error happens at line 35 of the flutter shell script, which tries to take a lock using the flock utility. < When asked, what has been your best career decision? Copy link Quote reply Contributor Hixie commented Jan 6, 2018. Find answers to Bad file descriptor ? Hypermart recently altered their systems and my cgi-scripts aren't working properly.Unlock this solution and get a sample of our free trial. Zone 02 Block 0172 Addr 08ac00 : Bad erase Zone 07 Block 0520 Addr 1e0800 : Bad erase Zone 07 Block 0631 Addr 1e7700 : Bad erase Zone 08 Block 0856 Addr 235800 : Bad erase root@ex-switch:RE:0% nand-mediack Media check on da0 on non-srx platforms Zone 02 Block 0172 Addr 08ac00 : Bad erase Recovering block Zone 07 Block 0520 Addr 1e0800 : Bad erase I keep getting these errors when I attempt brew cleanup. Without going into a lot of gory detail, essentialy you are creating a file with a descriptor on it before you invoke FLOCK. 3 line with flock 3 || true, does it work for you? But it does seem worth fixing, to make flutter work for folks who aren't comfortable editing a bash script.Can't do this since flutter fails. — Please provide your email to receive a sample view! Features →. Then you invoke flock with the file descriptor, put the commands you want to run under lock in, then manually release the lock using flock with the “-u” flag followed by the file descriptor.
Code review; Project management; Integrations; Actions; Packages; Security may be this will provide a way to keep the stream clean. Unless I disable the lock, in which case it works fine.This is free software; you are free to change and redistribute it.Can you add the indicated line below to your flutter shell script in the indicated position and tell me everything that prints when you run This is free software; you are free to change and redistribute it.It just occurred to me that this is in an NFS-mounted directory, and I know NFS has some differences in locking.
We could just ignore errors from flock, I guess... if you replace the flock Subsequent flock() calls on an already locked file will convert an existing lock to the new lock mode. Hixie self-assigned this Dec 20, 2017. Reply to this email directly, view it on GitHub UNLOCK SOLUTION My current fix is to edit bin/flutter to change 'if hash flock...' to have a misspelling in flock, so that it doesn't use flock, which fails on nfs. Possible workaround in #13955. Experts Exchange always has the answer, or at the least points me in the correct direction! I can make flutter work fine by changing the preceding line such that the if statement fails and a lock is not taken.I presume file descriptor 3 is supposed to be created by line 50, which reads:but don't care to learn enough bash to figure out why it is not working, particularly as I have a workaround.
Can't run Flutter on NFS (flock reports "Bad file descriptor") It is like having another employee that is extremely experienced. Deciding to stick with EE. ***> wrote: Any ideas? (No credit card required) You are receiving this because you authored the thread. don't know how much this helps but try to synchronize the way "is" is manipulated. If a process uses open(2) (or similar) to obtain more than one file descriptor for the same file, these file descriptors are treated independently by flock(). Being involved with EE helped me to grow personally and professionally. Why GitHub? Most are zero length, but a couple of them have an old version of a Formula. The first and second forms wraps the lock around the executing a command, in a manner similar to su(1) or newgrp(1).It locks a specified file or directory, which is created (assuming appropriate permissions), if it … We've partnered with two important charities to provide clean water and computer science education to those who need it most. Gain unlimited access to on-demand training courses with an Experts Exchange subscription. Connect with Certified Experts to gain insight and support on specific technology challenges including:
Thanks for figuring this out!On Tue, Dec 19, 2017 at 5:43 PM Ian Hickson ***@***. This is on a debian stable computer, and I have no experience using flock with bash, and haven't been able to debug it. Flutter works fine in /tmp, which is tmpfs. Re: bad file descriptor 807599 Apr 4, 2007 3:02 PM ( in response to 807599 ) hi, it seems the "is" is corrupted at times.
*This site is protected by reCAPTCHA and the Google This commit was created on GitHub.com and signed with a https://www.experts-exchange.com/questions/20737559/Bad-file-descriptor.html UNLOCK SOLUTION Unlock this solution and get a sample of our free trial. (No credit card required) That .cache folder contains lots of .brewing files. An attempt to lock the file using one of these file descriptors may be denied by a lock that the calling process has already placed via another descriptor. So I guess maybe you can somehow identify that NFS is in use and avoid flock in that case?I agree that NFS and locking don't do well, but I wouldn't have expected "Bad file descriptor"...Any chance that a fix for this could go in, so I could use flutter in my home directory over nfs? A process may only hold one type of lock (shared or exclusive) on a file. from the expert community at Experts Exchange NFS. That is what the “exec 200>” portion of the script is doing. This utility manages flock(2) locks from within shell scripts or the command line.. GitHub is home to over 50 million developers working together to host and review code, manage projects, and build software together.By clicking “Sign up for GitHub”, you agree to our I expect you may have difficulty reproducing this, but I run into the following error when running flutter:The error happens at line 35 of the flutter shell script, which tries to take a lock using the flock utility. < When asked, what has been your best career decision? Copy link Quote reply Contributor Hixie commented Jan 6, 2018. Find answers to Bad file descriptor ? Hypermart recently altered their systems and my cgi-scripts aren't working properly.Unlock this solution and get a sample of our free trial. Zone 02 Block 0172 Addr 08ac00 : Bad erase Zone 07 Block 0520 Addr 1e0800 : Bad erase Zone 07 Block 0631 Addr 1e7700 : Bad erase Zone 08 Block 0856 Addr 235800 : Bad erase root@ex-switch:RE:0% nand-mediack Media check on da0 on non-srx platforms Zone 02 Block 0172 Addr 08ac00 : Bad erase Recovering block Zone 07 Block 0520 Addr 1e0800 : Bad erase I keep getting these errors when I attempt brew cleanup. Without going into a lot of gory detail, essentialy you are creating a file with a descriptor on it before you invoke FLOCK. 3 line with flock 3 || true, does it work for you? But it does seem worth fixing, to make flutter work for folks who aren't comfortable editing a bash script.Can't do this since flutter fails. — Please provide your email to receive a sample view! Features →. Then you invoke flock with the file descriptor, put the commands you want to run under lock in, then manually release the lock using flock with the “-u” flag followed by the file descriptor.