NodeJs: Check if a file is locked without locking the file

I am trying to check if a file has been locked with another application.

I figured than I can do that easily by opening the file in writing mode.

fs.open('myfile.docx', 'r+', (err) => 
 if (!err) 
 console.log('File unlocked')
 
)

However, I do not want to lock the file because the other app could write data at any moment.

So, is there any way to check if a file is locked without locking it (and without administrative rights by using either node.js or windows cmd) ?

edited Nov 14 '18 at 7:37

asked Nov 13 '18 at 16:35

Yenyen

112

I think here is the answer: stackoverflow.com/questions/37690321/…

– lependu
Nov 13 '18 at 16:50

@lependu thanks, unfortunately, in the answer he locks the file. We are trying to avoid that.

– Yenyen
Nov 13 '18 at 17:11

add a comment |

I am trying to check if a file has been locked with another application.

I figured than I can do that easily by opening the file in writing mode.

fs.open('myfile.docx', 'r+', (err) => 
 if (!err) 
 console.log('File unlocked')
 
)

However, I do not want to lock the file because the other app could write data at any moment.

So, is there any way to check if a file is locked without locking it (and without administrative rights by using either node.js or windows cmd) ?

edited Nov 14 '18 at 7:37

asked Nov 13 '18 at 16:35

Yenyen

112

I think here is the answer: stackoverflow.com/questions/37690321/…

– lependu
Nov 13 '18 at 16:50

@lependu thanks, unfortunately, in the answer he locks the file. We are trying to avoid that.

– Yenyen
Nov 13 '18 at 17:11

add a comment |

I am trying to check if a file has been locked with another application.

I figured than I can do that easily by opening the file in writing mode.

fs.open('myfile.docx', 'r+', (err) => 
 if (!err) 
 console.log('File unlocked')
 
)

However, I do not want to lock the file because the other app could write data at any moment.

So, is there any way to check if a file is locked without locking it (and without administrative rights by using either node.js or windows cmd) ?

edited Nov 14 '18 at 7:37

asked Nov 13 '18 at 16:35

Yenyen

112

I am trying to check if a file has been locked with another application.

I figured than I can do that easily by opening the file in writing mode.

fs.open('myfile.docx', 'r+', (err) => 
 if (!err) 
 console.log('File unlocked')
 
)

However, I do not want to lock the file because the other app could write data at any moment.

So, is there any way to check if a file is locked without locking it (and without administrative rights by using either node.js or windows cmd) ?

node.js windows

edited Nov 14 '18 at 7:37

asked Nov 13 '18 at 16:35

Yenyen

112

edited Nov 14 '18 at 7:37

asked Nov 13 '18 at 16:35

Yenyen

112

edited Nov 14 '18 at 7:37

asked Nov 13 '18 at 16:35

Yenyen

112

asked Nov 13 '18 at 16:35

Yenyen

112

asked Nov 13 '18 at 16:35

Yenyen

112

I think here is the answer: stackoverflow.com/questions/37690321/…

– lependu
Nov 13 '18 at 16:50

@lependu thanks, unfortunately, in the answer he locks the file. We are trying to avoid that.

– Yenyen
Nov 13 '18 at 17:11

add a comment |

I think here is the answer: stackoverflow.com/questions/37690321/…

– lependu
Nov 13 '18 at 16:50

@lependu thanks, unfortunately, in the answer he locks the file. We are trying to avoid that.

– Yenyen
Nov 13 '18 at 17:11

I think here is the answer: stackoverflow.com/questions/37690321/…

– lependu
Nov 13 '18 at 16:50

@lependu thanks, unfortunately, in the answer he locks the file. We are trying to avoid that.

– Yenyen
Nov 13 '18 at 17:11

add a comment |

1 Answer
1

active

oldest

votes

You can use the Handle utility from Sysinternals.

It works by looping through all Windows processes and listing their open file handles. You may want to filter the output:

handle.exe | findstr myfile.docx

You can invoke this from node using child_process.exec

answered Nov 13 '18 at 22:54

mihai

24.1k74068

Thank you for this solution, but handle seams to need administrative rights and my app has only user rights.

– Yenyen
Nov 14 '18 at 7:35

add a comment |

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1 Answer
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active

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1 Answer
1

active

oldest

votes

You can use the Handle utility from Sysinternals.

It works by looping through all Windows processes and listing their open file handles. You may want to filter the output:

handle.exe | findstr myfile.docx

You can invoke this from node using child_process.exec

answered Nov 13 '18 at 22:54

mihai

24.1k74068

Thank you for this solution, but handle seams to need administrative rights and my app has only user rights.

– Yenyen
Nov 14 '18 at 7:35

add a comment |

You can use the Handle utility from Sysinternals.

It works by looping through all Windows processes and listing their open file handles. You may want to filter the output:

handle.exe | findstr myfile.docx

You can invoke this from node using child_process.exec

answered Nov 13 '18 at 22:54

mihai

24.1k74068

Thank you for this solution, but handle seams to need administrative rights and my app has only user rights.

– Yenyen
Nov 14 '18 at 7:35

add a comment |

You can use the Handle utility from Sysinternals.

It works by looping through all Windows processes and listing their open file handles. You may want to filter the output:

handle.exe | findstr myfile.docx

You can invoke this from node using child_process.exec

answered Nov 13 '18 at 22:54

mihai

24.1k74068

You can use the Handle utility from Sysinternals.

It works by looping through all Windows processes and listing their open file handles. You may want to filter the output:

handle.exe | findstr myfile.docx

You can invoke this from node using child_process.exec

answered Nov 13 '18 at 22:54

mihai

24.1k74068

answered Nov 13 '18 at 22:54

mihai

24.1k74068

answered Nov 13 '18 at 22:54

mihai

24.1k74068

answered Nov 13 '18 at 22:54

mihai

24.1k74068

Thank you for this solution, but handle seams to need administrative rights and my app has only user rights.

– Yenyen
Nov 14 '18 at 7:35

add a comment |

Thank you for this solution, but handle seams to need administrative rights and my app has only user rights.

– Yenyen
Nov 14 '18 at 7:35

Thank you for this solution, but handle seams to need administrative rights and my app has only user rights.

– Yenyen
Nov 14 '18 at 7:35

add a comment |

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