Simply fputs() example returns EOF

Question

This simple program, gives me troubles in fgets(), returning EOF, that is an error value for fgets() I don't understand where is the problem

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

FILE* openFile(const char* path)
{
    FILE* file;
    file = fopen(path, "r");
    if(file == NULL)
    {
        perror(path);
        exit(EXIT_FAILURE);
    }
    return file;
}


int main()
{
    FILE* file;
    char stringVector[6] = "hello";
    file = openFile("/home/user/workspace/fputs/src/testo.txt");

    if(fputs(&stringVector[0], file) == EOF)
    {
        printf("error in fputs");
        fclose(file);
        exit(EXIT_FAILURE);
    }

    fclose(file);
    return 0;
}

What's errno set to? Per the fputs() documentation, when EOF is returned, the value errno will be set with a code indicative of specifics. — David Duncan, Feb 07 '13 at 15:47

score 4 · Accepted Answer · answered Feb 07 '13 at 15:48

4

You are opening the file for reading, yet trying to write data to it? That doesn't make sense.

answered Feb 07 '13 at 15:48

unwind

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score 1 · Answer 2 · answered Feb 07 '13 at 15:51

1

In 'openFile()', you open the file with 'r', but 'fputs' wants to 'w' the file.

answered Feb 07 '13 at 15:51

Kai

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score 1 · Answer 3 · answered Feb 07 '13 at 15:53

1

Hm: &stringVector[0] ?

Which is exactly the same as doing : a = 1 - 1, why don't you do a = 0?

-> stringVector = &stringVector[0]

answered Feb 07 '13 at 15:53

SeedmanJ

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Simply fputs() example returns EOF

3 Answers3