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nftw question?

hi everyone,

I am going to code a program for visit files in a directory. Follows are my codes:

#include <ftw.h>
#include <string.h>
#include <stdio.h>

int fn(const char *file, const struct stat *sb, int flag, struct FTW *s)
{
FILE *fp;
char line[128+1];
int count =0;

if( flag==FTW_F ){
if(strstr(file,"status")!=NULL){
fp = fopen(file,"r");
fgets(line, sizeof(line), fp);
fclose(fp);
printf("%s", line);
}
}
return 0;
}

int main()
{
int result;

nftw("/proc/", fn, 100, FTW_MOUNT);
return 1;
}

When I compiled it using "gcc test.c", it printed out the following messages:
'struct FTW' declared inside parameter list
error: 'FTW_MOUNT' undeclared (first use in this function)
Does anybody know what happen about these codes? I know these definitions are in the file "ftw.h" already, why these errors come out?
Do I need to link some lib?

Waiting for you help! Thanks in advance.
May 19 '06 #1
4 3848
Banfa
9,065 Expert Mod 8TB
What is you definition of struct FTW?

It is nothing to do with libraries, all to do with the code, libraries only becaome an issue when you have got passed the compilation stage and onto the linking stage.
May 19 '06 #2
the definitions of struct of FTW and 'FTW_MOUNT' are all in the ftw.h file. That is why I don't understand.
May 20 '06 #3
Banfa
9,065 Expert Mod 8TB
the definitions of struct of FTW and 'FTW_MOUNT' are all in the ftw.h file. That is why I don't understand.
Excellent, but unless you post that code then I can't see it. You haven't even said what line of what file these errors occur on.

I am guessing that for some reason the structures in question are not in scope at the point you try to use them but unless you post all the code that is effecting the problem I am unable to tell.
May 22 '06 #4
I have gotten the idea from somebody.
Just add "#include _XOPEN_SOURCE 500" at the 1st line of codes.
May 24 '06 #5

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