The below C program, on ubuntu 10.04, does not recognize symbolic links, but prints the status of the target of the link.
What should I change to get from stat() that the file is a symlink and not the status of the target of the symlink ?
Looking on google didn't give me any ideas, and other documentation I found doesn't help either.
Thanks,
Ron.
$ ls -lsa ./RCS_link
0 lrwxrwxrwx 1 ronbarak ronbarak 5 2010-11-08 15:47 ./RCS_link -> ./RCS
$ ./stat_ex ./RCS_link
argv[1]: ./RCS_link
directory
$
$ ls -lsa .bashrc
0 lrwxrwxrwx 1 ronbarak ronbarak 22 2010-11-08 14:40 .bashrc -> /home/ronbarak/.bashrc
$ ./stat_ex .bashrc
argv[1]: .bashrc
regular file
$
$ ls -lsa /proc/self/fd/0
0 lrwx------ 1 ronbarak ronbarak 64 2010-11-08 15:51 /proc/self/fd/0 -> /dev/pts/5
$ ./stat_ex /proc/self/fd/0
argv[1]: /proc/self/fd/0
character device
$
$ cat ./stat_ex.c
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/dir.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
main(int argc, char *argv[])
{
struct stat sbuf;
if (argc < 2)
{
fprintf(stderr, "Usage: %s <pathname> [<pathname>]\n",
argv[0]);
exit(EXIT_FAILURE);
}
while (--argc)
{
printf("argv[%d]: %s\n", argc,argv[argc]);
if (stat(argv[argc], &sbuf) == -1)
{
perror("stat");
exit(EXIT_SUCCESS);
}
switch (sbuf.st_mode & S_IFMT)
{
case S_IFBLK: printf("block device\n");
break;
case S_IFCHR: printf("character device\n");
break;
case S_IFDIR: printf("directory\n");
break;
case S_IFIFO: printf("FIFO/pipe\n");
break;
case S_IFLNK: printf("symlink\n");
break;
case S_IFREG: printf("regular file\n");
break;
case S_IFSOCK: printf("socket\n");
break;
default: printf("unknown?\n");
break;
}
}
exit(EXIT_SUCCESS);
}
Question How to get stat() of symlink and not of target of symlink ?
