C API to check if file has a link or not

barunparichha · 07-16-2009, 04:16 AM

I need a C API to check, if the file has a link or not.
The requirement is as follows:
1. To write a prog in C, which accepts file name as input and decides, if the input is a link file or not. I don't want to use any system command in my prog.

jlliagre · 07-16-2009, 04:26 AM

Per the LQ Rules, please do not post homework assignments verbatim. We're happy to assist if you have specific questions or have hit a stumbling point, however. Let us know what you've already tried and what references you have used (including class notes, books, and Google searches) and we'll do our best to help. Also, keep in mind that your instructor might also be an LQ member.

barunparichha · 07-16-2009, 04:35 AM

Hi Moderator,
This is not a home asignment, but I need this API for a Solairs cluster.

I know some of the answers, but they are not suitable for the envirment I use.

I thought of getting a quick answer from genius like you.
Even if I am not getting any response, I will post the answer so that someone like me would be benefited in future.

Thanks,
Barun

barunparichha · 07-16-2009, 06:49 AM

This one of the ways to get link information. Please check the "struct stat" for more information.

#include<stdio.h>
#include<sys/types.h>
#include<sys/stat.h>
#include<unistd.h>

int main()
{

struct stat s_stat;

if(lstat(".ldel",&s_stat)==0)
{
if(S_ISLNK(s_stat.st_mode))
printf("\n link file");
else
printf("\n not a link file");
}
else
printf("\nUnable to open file");
}

jlliagre · 07-16-2009, 07:22 AM

Please wrap your code sample with code tags.

Quote:

Originally Posted by barunparichha

printf("\n link file");

Your printfs are oddly formatted, the "\n" is normally put at the end of the string, not before it. eg:

Code:

printf("link file\n");

Quote:

Originally Posted by barunparichha

I thought of getting a quick answer from genius like you.

You did !