1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
|
#include <unistd.h> /* syscall(2), */
#include <stdio.h> /* perror(3), fprintf(3), */
#include <limits.h> /* PATH_MAX, */
#include <stdlib.h> /* exit(3), */
#include <sys/syscall.h> /* SYS_readlink, */
int main(int argc, char *argv[])
{
char path[PATH_MAX];
int status;
if (argc != 2) {
fprintf(stderr, "usage: readlink FILE\n");
exit(EXIT_FAILURE);
}
status = syscall(SYS_readlink, argv[1], path, PATH_MAX);
if (status < 0) {
perror("readlink()");
exit(EXIT_FAILURE);
}
path[status] = '\0';
puts(path);
exit(EXIT_SUCCESS);
}
|
