Commit | Line | Data |
---|---|---|
8fa222eb TL |
1 | #include <stdio.h> |
2 | #include <pwd.h> | |
3 | ||
4 | struct passwd *pwd,*getpwnam(); | |
5 | char *crypt(); | |
6 | char *getpass(); | |
7 | ||
8 | main(argc,argv) | |
9 | int argc; | |
10 | char **argv; | |
11 | { | |
12 | char *nptr; | |
13 | char *password; | |
14 | int badsw = 0; | |
15 | char *shell = "/bin/sh"; | |
16 | ||
17 | if(argc > 1) | |
18 | nptr = argv[1]; | |
19 | else | |
20 | nptr = "root"; | |
21 | if((pwd=getpwnam(nptr)) == NULL) { | |
22 | printf("Unknown id: %s\n",nptr); | |
23 | exit(1); | |
24 | } | |
25 | if(pwd->pw_passwd[0] == '\0' || getuid() == 0) | |
26 | goto ok; | |
27 | password = getpass("Password:"); | |
28 | if(badsw || (strcmp(pwd->pw_passwd, crypt(password, pwd->pw_passwd)) != 0)) { | |
29 | printf("Sorry\n"); | |
30 | exit(2); | |
31 | } | |
32 | ||
33 | ok: | |
34 | endpwent(); | |
35 | setgid(pwd->pw_gid); | |
36 | setuid(pwd->pw_uid); | |
37 | if (pwd->pw_shell && *pwd->pw_shell) | |
38 | shell = pwd->pw_shell; | |
39 | execl(shell, "su", 0); | |
40 | printf("No shell\n"); | |
41 | exit(3); | |
42 | } |