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digitalmars.D.learn - phobos std.Stream.File incorrect open/wrong implementation

reply Spacen Jasset <spacenjasset yahoo.co.uk> writes:
I am trying to create a new file for writing, as a log file, like this:

new File("gltest.log", FileMode.OutNew);

and find that with any of the "write" options the file appears to be 
opened for exclusive access on windows, so another process cannot then 
read from the same file. Is there a way around this? Other than 
continually opening and closing the log file, which also won't work 
because then the log file can't be written to if it's being read from.

14:25:35	gltest.exe:5852	OPEN	J:\bzr\gltest\trunk\gltest.log	SUCCESS 
Options: OpenIf  Access: 00120196	


I have also seen that readline like activity:

	foreach (char[] line; input) {

will make system calls for one byte at a time? Is there no buffering in 
the phobos lib?

14:25:35	gltest.exe:5852	OPEN	J:\bzr\gltest\trunk\gltest.cfg	SUCCESS 
Options: Open  Access: Read	
14:25:35	gltest.exe:5852	QUERY INFORMATION 
J:\bzr\gltest\trunk\gltest.cfg	SUCCESS	Length: 381	
14:25:35	gltest.exe:5852	READ 	J:\bzr\gltest\trunk\gltest.cfg	SUCCESS 
Offset: 0 Length: 1	
14:25:35	gltest.exe:5852	READ	J:\bzr\gltest\trunk\gltest.cfg	SUCCESS 
Offset: 1 Length: 1	
14:25:35	gltest.exe:5852	READ	J:\bzr\gltest\trunk\gltest.cfg	SUCCESS 
Offset: 2 Length: 1	
14:25:35	gltest.exe:5852	READ	J:\bzr\gltest\trunk\gltest.cfg	SUCCESS 
Offset: 3 Length: 1
Oct 24 2008
parent Spacen Jasset <spacenjasset yahoo.co.uk> writes:
Spacen Jasset wrote:

 I am trying to create a new file for writing, as a log file, like this:
 
 new File("gltest.log", FileMode.OutNew);
 
 and find that with any of the "write" options the file appears to be 
 opened for exclusive access on windows, so another process cannot then 
 read from the same file. Is there a way around this? Other than 
 continually opening and closing the log file, which also won't work 
 because then the log file can't be written to if it's being read from.
 
 14:25:35    gltest.exe:5852    OPEN    J:\bzr\gltest\trunk\gltest.log    
 SUCCESS Options: OpenIf  Access: 00120196   
 
 
 I have also seen that readline like activity:
 
     foreach (char[] line; input) {
 
 will make system calls for one byte at a time? Is there no buffering in 
 the phobos lib?
 
 14:25:35    gltest.exe:5852    OPEN    J:\bzr\gltest\trunk\gltest.cfg    
 SUCCESS Options: Open  Access: Read   
 14:25:35    gltest.exe:5852    QUERY INFORMATION 
 J:\bzr\gltest\trunk\gltest.cfg    SUCCESS    Length: 381   
 14:25:35    gltest.exe:5852    READ     
 J:\bzr\gltest\trunk\gltest.cfg    SUCCESS Offset: 0 Length: 1   
 14:25:35    gltest.exe:5852    READ    J:\bzr\gltest\trunk\gltest.cfg    
 SUCCESS Offset: 1 Length: 1   
 14:25:35    gltest.exe:5852    READ    J:\bzr\gltest\trunk\gltest.cfg    
 SUCCESS Offset: 2 Length: 1   
 14:25:35    gltest.exe:5852    READ    J:\bzr\gltest\trunk\gltest.cfg    
 SUCCESS Offset: 3 Length: 1   


I've raised a bug for the wrong share mode.

The workaround is to say: FileMode.OutNew |  FileMode.In even if you 
don't want to read from the file.
Oct 24 2008