Hi,
I'm desperate!
I was trying to write a program that uses one of the
above syscall, but nothing seems to work right for me,
so please please please take a look and tell me what's
wrong.
Summary of the problems:
1. without the line "#define stat64 stat" the compiler
complains that it doesn't know the size of stat64
structures
2. while lstat works fine, fstat and fstat64 give
absolutely wrong results
3. lstat64 completely f#cks up the char pointer that
it gets as an argument
4. open() function return a pretty strange file
descriptor (3).
Again, please help me.
Thanks a lot.
/*test2.c*/
#include <fcntl.h>
#include <sys/stat.h>
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#define stat64 stat
int main(int argc, char *argv[])
{
char fileName[50];
struct stat statbuf;
struct stat64 statbuf64;
int a, fstatRet, lstatRet;
strcpy(fileName, "/etc/passwd");
printf ("fileName: %s\n", fileName);
lstatRet=lstat(fileName, &statbuf);
if (lstatRet) return 1;
printf("according to lstat: %s was accessed on
%s\n",fileName, ctime(&(statbuf.st_atime)));
a=open (fileName,O_RDONLY );
if (a==-1) printf("could not open %s: %s\n",fileName,
strerror(errno));
else printf("%s was opened: %d\n",fileName,a);
fstatRet=fstat64(a,&statbuf64);
printf("according to fstat64: %s was accessed on
%s",fileName,ctime(&(statbuf64.st_atime)));
fstatRet=fstat(a,&statbuf);
printf("according to fstat: %s was accessed on
%s",fileName,ctime(&(statbuf64.st_atime)));
lstatRet=lstat64(fileName,&statbuf);
printf("after calling lstat64, the fileName is
%s\n",fileName);
return 0;
}
$ gcc -o test2 -lm -lc test2.c && ./test2
fileName: /etc/passwd
according to lstat: /etc/passwd was accessed on Wed
Feb 25 23:10:00 2004
/etc/passwd was opened: 3
according to fstat64: /etc/passwd was accessed on Thu
Jan 1 02:00:08 1970
according to fstat: /etc/passwd was accessed on Thu
Jan 1 02:00:08 1970
after calling lstat64, the fileName is ޾
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