Joe Krahn:
> When you do fstat() on a symlink, st_size is supposed to return the
> length of the stored symlink-target string, rather than the file data
> size. So, if you want to read the symlink string to store it in the
No, that is wrong.
fstat(2) for symlink doesn't return the length of the stored
symlink-target string.
Will you try this simple C program under an empty dir on ext2?
It will show you the size of /etc/hosts (after some error messagees).
#include <sys/types.h>
#include <sys/stat.h>
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
int main(int argc, char *argv[])
{
int err, fd;
char *f, *s;
struct stat st;
s = "symlink";
f = "no_such_file";
err = access(f, F_OK);
perror(f);
assert(err);
err = symlink(f, s);
assert(!err);
fd = open(s, O_RDONLY);
perror(s);
assert(fd < 0);
unlink(s);
f = "/etc/hosts";
err = access(f, F_OK);
assert(!err);
err = symlink(f, s);
assert(!err);
fd = open(s, O_RDONLY);
assert(fd >= 0);
err = fstat(fd, &st);
assert(!err);
printf("%s size %lu\n", s, st.st_size);
return 0;
}
J. R. Okajima
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