fopen returns NULL

[Oceanblue]

Hi folks,

I'm trying to save a byte array to a file, but not successful.

Here is the code I tried
FILE * pFile;
pFile = fopen ( "my.bin" , "wb" );
__android_log_write(ANDROID_LOG_DEBUG, DEBUG_TAG, "opened
file");
if (NULL == pFile){
__android_log_write(ANDROID_LOG_DEBUG, DEBUG_TAG, "null
file pointer");
}
fwrite (barray , 1 , barray_size , pFile );
fclose (pFile);


I get this message in logcat:
"null file pointer"

I do have this permission in the manifest too:
<uses-permission
android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-
permission>

Any thoughts?

[David Turner]

what's the value of errno, it should tell you what's wrong.

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[Oceanblue]

Hi David,

Thanks for quick response, as always.

errno = 30
strerror(errno) = Read-only file system

Hmmm. Wonder what I have to do to write to it.

[Oceanblue]

Ok, I resolved it.

I needed to use the full pathname in the fopen.