LinuxQuestions.org - How to return empty char * ?

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- - How to return empty char * ? (https://www.linuxquestions.org/questions/programming-9/how-to-return-empty-char-%2A-750700/)

well, the code was not written by me. The code was from windows, it compiled fine and running fine so far. I am switching the library to linux to run. I guess it might be changed after returned, so I don't want to change to constant.

Quote:

Originally Posted by fantas (Post 3660868)

So what's the difference ?

As an exorcise for the reader, I will let you evaluate how "\0" != NULL, and what it means for string manipulation functions (and what the value of "\0" versus NULL would be).

Quote:

Of course not, without enabling all warnings.

Code:

[12:23:02][aconole@ssh:~]

$ cat test.c

#include <stdio.h>

#include <string.h>



char *foo()

{

    return "\0";

}



int main()

{

    char *f = foo();



    *f = 'a';



    return 0;

}

[12:23:11][aconole@ssh:~]

$ gcc -Wall -o t test.c

[12:23:17][aconole@ssh:~]

$ ./t

Segmentation fault

[12:23:19][aconole@ssh:~]

$

Not trying to troll here, but you might want to check before you make a claim.