fopen() in c returns null

[lakshmi1]

why fopen returns null,is there any specific reason

[gpraghuram]

HI,
In which mode r u opening the file
Check the path of the file,being passed as argument
This may be the reason , for which fopen returns null

Thanks
Raghuram

[lakshmi1]

HI,
In which mode r u opening the file
Check the path of the file,being passed as argument
This may be the reason , for which fopen returns null

Thanks
Raghuram

Hi,

I am opening file in write mode.Path contains a very big string.
Several files were copied into the same path,but suddenly for one of the file
it is not able to write into the same path

Thanks,
srilakshmi

[gpraghuram]

Hi,
I think there is a restriction to path size of 260 characters.(I am not very sure abt this)
Check for the failing fopen the path is greater than 260 characters.
This value is in stdio.h

Thanks
Raghuram

[ilikepython]

HI,
In which mode r u opening the file
Check the path of the file,being passed as argument
This may be the reason , for which fopen returns null

Thanks
Raghuram

Also, dont' forget that if the file isn't there or fopen() can't open it, it will return null as well. You should always check after you open a file, to see if it returned null or the actual file pointer.

[AdrianH]

Also check the errno value.


Adrian

[Silent1Mezzo]

Also, dont' forget that if the file isn't there or fopen() can't open it, it will return null as well.

fopen() in write mode will create the file if it doesn't exist.

[ilikepython]

fopen() in write mode will create the file if it doesn't exist.

Yep, that is also true.