Commit | Line | Data |
---|---|---|
baacda2f DR |
1 | #include <stdio.h> |
2 | #include <pwd.h> | |
3 | ||
4 | struct passwd *pwd,*getpwnam(); | |
5 | char *crypt(); | |
6 | char *getpass(); | |
7 | char **environ; | |
8 | ||
9 | main(argc,argv) | |
10 | int argc; | |
11 | char **argv; | |
12 | { | |
13 | register char **p; | |
14 | char *nptr; | |
15 | char *password; | |
16 | int badsw = 0; | |
17 | char *shell = "/bin/sh"; | |
18 | ||
19 | if(argc > 1) | |
20 | nptr = argv[1]; | |
21 | else | |
22 | nptr = "root"; | |
23 | if((pwd=getpwnam(nptr)) == NULL) { | |
24 | printf("Unknown id: %s\n",nptr); | |
25 | exit(1); | |
26 | } | |
27 | if(pwd->pw_passwd[0] == '\0' || getuid() == 0) | |
28 | goto ok; | |
29 | password = getpass("Password:"); | |
30 | if(badsw || (strcmp(pwd->pw_passwd, crypt(password, pwd->pw_passwd)) != 0)) { | |
31 | printf("Sorry\n"); | |
32 | exit(2); | |
33 | } | |
34 | ||
35 | ok: | |
36 | endpwent(); | |
37 | setgid(pwd->pw_gid); | |
38 | setuid(pwd->pw_uid); | |
39 | if (pwd->pw_shell && *pwd->pw_shell) | |
40 | shell = pwd->pw_shell; | |
41 | for (p=environ; *p; p++) { | |
42 | if (strncmp("PS1=", *p, 4) == 0) { | |
43 | *p = "PS1=# "; | |
44 | break; | |
45 | } | |
46 | } | |
47 | execl(shell, "su", 0); | |
48 | printf("No shell\n"); | |
49 | exit(3); | |
50 | } |