close file with fclose() but file still in use
- by Marco
Hi all,
I've got a problem with deleting/overwriting a file using my program which is also being used(read) by my program. The problem seems to be that because of the fact my program is reading data from the file (output.txt) it puts the file in a 'in use' state which makes it impossible to delete or overwrite the file.
I don't understand why the file stays 'in use' because I close the file after use with fclose();
this is my code:
bool bBool = true
while(bBool){
//Run myprogram.exe tot generate (a new) output.txt
//Create file pointer and open file
FILE* pInputFile = NULL;
pInputFile = fopen("output.txt", "r");
//
//then I do some reading using fscanf()
//
//And when I'm done reading I close the file using fclose()
fclose(pInputFile);
//The next step is deleting the output.txt
if( remove( "output.txt" ) == -1 ){
//ERROR
}else{
//Succesfull
}
}
I use fclose() to close the file but the file remains in use by my program until my program is totally shut down.
What is the solution to free the file so it can be deleted/overwrited?
In reality my code isn't a loop without an end ; )
Thanks in advance!
Marco
Update
Like ask a part of my code which also generates the file 'in use'. This is not a loop and this function is being called from the main();
Here is a piece of code:
int iShapeNr = 0;
void firstRun()
{
//Run program that generates output.txt
runProgram();
//Open Shape data file
FILE* pInputFile = NULL;
int iNumber = 0;
pInputFile = fopen("output.txt", "r");
//Put all orientations of al detected shapes in an array
int iShapeNr = 0;
int iRotationBuffer[1024];//1024 is maximum detectable shapes, can be changed in RoboRealm
int iXMinBuffer[1024];
int iXMaxBuffer[1024];
int iYMinBuffer[1024];
int iYMaxBuffer[1024];
while(feof(pInputFile) == 0){
for(int i=0;i<9;i++){
fscanf(pInputFile, "%d", &iNumber);
fscanf(pInputFile, ",");
if(i == 1) {
iRotationBuffer[iShapeNr] = iNumber;
}
if(i == 3){//xmin
iXMinBuffer[iShapeNr] = iNumber;
}
if(i == 4){//xmax
iXMaxBuffer[iShapeNr] = iNumber;
}
if(i == 5){//ymin
iYMinBuffer[iShapeNr] = iNumber;
}
if(i == 6){//ymax
iYMaxBuffer[iShapeNr] = iNumber;
}
}
iShapeNr++;
}
fflush(pInputFile);
fclose(pInputFile);
}
The while loop parses the file. The output.txt contains sets of 9 variables, the number of sets is unknown but always in sets of 9.
output.txt could contain for example: 0,1,2,3,4,5,6,7,8,8,7,6,5,4,1,2,3,0
