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
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/stat.h>
const char *progname;
static __noreturn usage(void)
{
fprintf(stderr, "Usage: %s [-f] link...\n", progname);
exit(1);
}
int main(int argc, char *argv[])
{
int c, f_flag = 0;
const char *name;
char link_name[PATH_MAX];
int rv;
progname = argv[0];
do {
c = getopt(argc, argv, "f");
if (c == EOF)
break;
switch (c) {
case 'f':
f_flag = 1;
break;
case '?':
fprintf(stderr, "%s: invalid option -%c\n",
progname, optopt);
usage();
}
} while (1);
if (optind == argc)
usage();
argv += optind;
while ((name = *argv++)) {
if (f_flag)
rv = realpath(name, link_name) ? strlen(link_name) : -1;
else
rv = readlink(name, link_name, sizeof link_name - 1);
if (rv < 0) {
perror(name);
exit(1);
}
link_name[rv] = '\n';
_fwrite(link_name, rv+1, stdout);
}
return 0;
}
|
