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
58
|
#include "crypt.h"
int main (int argc, char **argv)
{
char *hash, *key, *salt;
int opt;
while ((opt = getopt(argc, argv, "h")) != -1) {
switch (opt) {
case 'h': /* Help */
usage(stdout, EXIT_SUCCESS);
break;
case '?': /* Unknown option */
usage(stderr, EXIT_FAILURE);
break;
default: /* Shouldn't happen */
abort();
}
}
/*
* If we don't have three arguments left after processing the options,
* exit with usage information and error status
*/
if (argc != 3)
usage(stderr, EXIT_FAILURE);
key = argv[1];
salt = argv[2];
/*
* Create the hash, but exit immediately with the system error string
* if it returns a null pointer (error condition)
*/
if (!(hash = crypt(key, salt)))
error(strerror(errno));
puts(hash);
exit(EXIT_SUCCESS);
}
/*
* Show usage to given stream, and exit with given code
*/
void usage(FILE *stream, int status)
{
fputs("USAGE: crypt [-h | KEY SALT]\n", stream);
exit(status);
}
/*
* Exit with error error message
*/
void error(char *message)
{
fprintf(stderr, "%s\n", message);
exit(EXIT_FAILURE);
}
|
