42 lines
654 B
C
42 lines
654 B
C
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/types.h>
|
|
|
|
/* get_inode - returns the inode of the file associated
|
|
* with the given file descriptor, or -1 on failure.
|
|
*/
|
|
int get_inode(int fd);
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
if (argc < 2) {
|
|
fprintf(stderr, "usage: %s <file>\n", argv[0]);
|
|
return 1;
|
|
}
|
|
|
|
int fd = open(argv[1], O_RDONLY);
|
|
if (fd < 0) {
|
|
perror("open");
|
|
return 1;
|
|
}
|
|
|
|
int inode = get_inode(fd);
|
|
printf("%d\n", inode);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int get_inode(int fd)
|
|
{
|
|
struct stat buf;
|
|
|
|
int ret = fstat(fd, &buf);
|
|
if (ret < 0) {
|
|
perror("fstat");
|
|
return -1;
|
|
}
|
|
return buf.st_ino;
|
|
}
|