Re: [ts-7000] TS-7400 segmentation fault with fprintf

[Rod <>]

With stream file operations you must use the 'fopen' call, not 'open', 
that's your problem.
You probably also got a compile warning that you fixed with the (FILE *) 
cast to convert the normally returned int to a FILE* type.
Anyway, use 'fopen' to open/create your file, the rest is fine.

Cheers

--
Rod



dglen2000 wrote:

> Hi guys, I am developing code on the TS7400 running debian, and I have
> encountered a problem with writing to files. I am new to writing
> software for debian, so please bear with me.
>
> my program exits after printing a segmentation fault... here is my
> code, its basically just a hello world to a file.
>
> int main (){
>
> FILE * f1 = (FILE*)(open("test.txt", O_RDWR|O_CREAT, S_IRUSR |
> S_IWUSR | S_IRGRP | S_IRWXO));
>
> if (f1!=NULL){
> printf("\nfile test.txt created\n");
> fprintf(f1,"Hi... im the file contents");
> fclose (f1);
> } else {
> printf("\nfile failed to open\n");
> fclose (f1);
> }
>
> return 0;
>
> }
>
> when I exicute the program it prints that the file is created, so I
> know I am not trying to write to a NULL pointer. Just after that the
> segmentation fault occurs. test.txt exists but is empty.
>
> Please tell me why this is happening, and what I can do to resolve it
>
> Thanks,
> David
>
>  


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