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Commit | Line | Data |
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7283d000 | 1 | /* |
2 | * Copyright 1988 by the Massachusetts Institute of Technology. For copying | |
3 | * and distribution information, see the file "mit-copyright.h". | |
4 | * | |
5 | * $Source$ | |
6 | * $Header$ | |
7 | * $Author$ | |
8 | * | |
9 | */ | |
10 | ||
11 | #ifndef lint | |
12 | static char *rcsid_chsh_c = "$Header$"; | |
13 | #endif not lint | |
14 | ||
15 | /* | |
8defc06b | 16 | * Talk to the MOIRA database to change a person's login shell. The chosen |
7283d000 | 17 | * shell must exist. A warning will be issued if the shell is not in |
18 | * /etc/shells. | |
19 | * | |
20 | * chsh with no modifiers changes the shell of the user who is running | |
21 | * the program. | |
22 | * | |
23 | * If a commandline argument is given, it is taken to be the username | |
24 | * of the user whose shell is to be changed. | |
25 | * | |
26 | */ | |
27 | ||
b687d789 | 28 | #ifdef POSIX |
29 | #include <unistd.h> | |
30 | #endif | |
7283d000 | 31 | #include <sys/types.h> |
32 | #include <stdio.h> | |
f071d8a7 | 33 | #include <string.h> |
7283d000 | 34 | #include <sys/file.h> |
35 | #include <krb.h> | |
36 | #include <ctype.h> | |
37 | #include <errno.h> | |
38 | ||
8defc06b | 39 | /* MOIRA includes */ |
40 | #include <moira.h> | |
41 | #include <moira_site.h> | |
7283d000 | 42 | #include "mit-copyright.h" |
43 | ||
44 | char *whoami; | |
45 | char *getusershell(); | |
46 | ||
47 | extern char *krb_err_txt[]; | |
48 | ||
49 | main(argc, argv) | |
50 | int argc; | |
51 | char *argv[]; | |
52 | { | |
53 | char pname[ANAME_SZ]; | |
54 | char *uname = pname; | |
55 | int k_errno; | |
56 | char *whoami; | |
57 | ||
f071d8a7 | 58 | if ((whoami = strrchr(argv[0], '/')) == NULL) |
7283d000 | 59 | whoami = argv[0]; |
60 | else | |
61 | whoami++; | |
62 | ||
63 | if (argc > 2) { | |
64 | usage(); | |
65 | } | |
66 | ||
67 | if (argc == 2) | |
68 | uname = argv[1]; | |
69 | else | |
70 | { | |
71 | /* Do it right; get name from kerberos ticket file rather than | |
72 | from passord file. */ | |
73 | ||
74 | if (k_errno = tf_init(TKT_FILE, R_TKT_FIL)) { | |
75 | fprintf(stderr, "%s: %s\n", whoami, krb_err_txt[k_errno]); | |
76 | exit(1); | |
77 | } | |
78 | ||
79 | if (k_errno = tf_get_pname(pname)) { | |
80 | fprintf(stderr, "%s: %s\n", whoami, krb_err_txt[k_errno]); | |
81 | exit(1); | |
82 | } | |
83 | ||
84 | tf_close(); | |
85 | } | |
86 | ||
87 | exit(chsh(uname)); | |
88 | } | |
89 | ||
90 | leave(status) | |
91 | int status; | |
8defc06b | 92 | /* This should be called rather than exit once connection to moira server |
7283d000 | 93 | has been established. */ |
94 | { | |
8defc06b | 95 | mr_disconnect(); |
7283d000 | 96 | exit(status); |
97 | } | |
98 | ||
99 | scream() | |
100 | { | |
95cd286e | 101 | com_err(whoami, 0, "Unexpected return value from Moira -- programmer botch"); |
7283d000 | 102 | leave(1); |
103 | } | |
104 | ||
105 | chsh(uname) | |
106 | char *uname; | |
107 | { | |
108 | int status; /* general purpose exit status */ | |
8defc06b | 109 | int q_argc; /* argc for mr_query */ |
110 | char *q_argv[U_END]; /* argv for mr_query */ | |
111 | char *motd; /* determine MR server status */ | |
7283d000 | 112 | |
113 | int got_one = 0; /* have we got a new shell yet? */ | |
114 | char shell[BUFSIZ]; /* the new shell */ | |
115 | int get_shell(); | |
116 | void check_shell(); /* make sure new shell is valid */ | |
117 | ||
118 | /* Try each query. If we ever fail, print error message and exit. */ | |
119 | ||
8defc06b | 120 | status = mr_connect(NULL); |
7283d000 | 121 | if (status) { |
95cd286e | 122 | com_err(whoami, status, " while connecting to Moira"); |
7283d000 | 123 | exit(1); |
124 | } | |
125 | ||
8defc06b | 126 | status = mr_motd(&motd); |
262ca740 | 127 | if (status) { |
128 | com_err(whoami, status, " unable to check server status"); | |
129 | leave(1); | |
130 | } | |
131 | if (motd) { | |
95cd286e | 132 | fprintf(stderr, "The Moira server is currently unavailable:\n%s\n", motd); |
262ca740 | 133 | leave(1); |
134 | } | |
135 | ||
8defc06b | 136 | status = mr_auth("chsh"); /* Don't use argv[0] - too easy to fake */ |
7283d000 | 137 | if (status) { |
138 | com_err(whoami, status, | |
139 | " while authenticating -- run \"kinit\" and try again."); | |
140 | leave(1); | |
141 | } | |
142 | ||
143 | /* First, do an access check */ | |
144 | ||
145 | q_argv[USH_NAME] = uname; | |
146 | q_argv[USH_SHELL] = "junk"; | |
147 | q_argc = USH_END; | |
148 | ||
8defc06b | 149 | if (status = mr_access("update_user_shell", q_argc, q_argv)) |
7283d000 | 150 | { |
151 | com_err(whoami, status, "; shell not\nchanged."); | |
152 | leave(2); | |
153 | } | |
154 | ||
155 | printf("Changing login shell for %s.\n", uname); | |
156 | ||
157 | /* Display current information */ | |
158 | ||
159 | q_argv[NAME] = uname; | |
160 | q_argc = NAME + 1; | |
161 | ||
7be7e273 | 162 | if ((status = mr_query("get_user_account_by_login", q_argc, q_argv, |
7283d000 | 163 | get_shell, (char *) uname))) |
164 | { | |
165 | com_err(whoami, status, " while getting user information."); | |
166 | leave(2); | |
167 | } | |
168 | ||
169 | /* Ask for new shell */ | |
170 | while (!got_one) | |
171 | { | |
172 | printf("New shell: "); | |
5bd0a4c4 | 173 | if (fgets(shell, sizeof(shell), stdin) == NULL) |
174 | leave(0); | |
7283d000 | 175 | got_one = (strlen(shell) > 1); |
176 | } | |
177 | ||
178 | shell[strlen(shell) - 1] = 0; /* strip off newline */ | |
179 | ||
180 | /* Make sure we have a valid shell. This routine could exit */ | |
181 | check_shell(shell); | |
182 | ||
183 | /* Change shell */ | |
184 | ||
185 | printf("Changing shell to %s...\n", shell); | |
186 | ||
187 | q_argv[USH_NAME] = uname; | |
188 | q_argv[USH_SHELL] = shell; | |
189 | q_argc = USH_END; | |
8defc06b | 190 | if (status = mr_query("update_user_shell", q_argc, q_argv, |
7283d000 | 191 | scream, (char *) NULL)) |
192 | { | |
193 | com_err(whoami, status, " while changing shell."); | |
194 | leave(2); | |
195 | } | |
196 | ||
197 | printf("Shell successfully changed.\n"); | |
8defc06b | 198 | mr_disconnect(); |
7283d000 | 199 | |
200 | return(0); | |
201 | } | |
202 | ||
203 | get_shell(argc, argv, uname) | |
204 | int argc; | |
205 | char **argv; | |
206 | char *uname; /* for sanity checking */ | |
207 | { | |
208 | /* We'll just take the first information we get since login names | |
209 | cannot be duplicated in the database. */ | |
210 | ||
b687d789 | 211 | if (argc < U_END || strcmp(argv[U_NAME], uname)) |
7283d000 | 212 | { |
213 | fprintf(stderr, "Some internal error has occurred. Try again.\n"); | |
214 | leave(3); | |
215 | } | |
216 | ||
217 | printf("Account information last changed on %s\n", argv[U_MODTIME]); | |
218 | printf("by user %s with %s.\n", argv[U_MODBY], argv[U_MODWITH]); | |
219 | printf("Current shell for %s is %s.\n", uname, argv[U_SHELL]); | |
220 | ||
8defc06b | 221 | return(MR_ABORT); /* Don't pay attention to other matches. */ |
7283d000 | 222 | } |
223 | ||
224 | void check_shell(shell) | |
225 | char *shell; | |
226 | { | |
227 | char *valid_shell; | |
228 | int ok = 0; | |
229 | ||
230 | while (valid_shell = getusershell()) { | |
231 | if (strcmp(shell, valid_shell) == NULL) { | |
232 | ok = 1; | |
233 | break; | |
234 | } | |
f071d8a7 | 235 | else if (strcmp(shell, 1+strrchr(valid_shell, '/')) == NULL) { |
7283d000 | 236 | ok = 1; |
237 | (void) strcpy(shell, valid_shell); | |
238 | break; | |
239 | } | |
240 | } | |
241 | ||
242 | if (!ok) { | |
243 | if (shell[0] != '/') { | |
244 | fprintf(stderr, "%s it not a standard shell. ", shell); | |
245 | fprintf(stderr, "You may choose to use a nonstandard\n"); | |
246 | fprintf(stderr, "shell, but you must specify its complete "); | |
247 | fprintf(stderr, "path name.\n"); | |
248 | leave(2); | |
249 | } | |
250 | else if (access(shell, X_OK)) { | |
251 | fprintf(stderr, "%s is not available.\n", shell); | |
252 | leave(2); | |
253 | } | |
254 | else { | |
255 | printf("%s exists but is an unusual choice.\n", shell); | |
256 | printf("Try again if it is not what you wanted.\n"); | |
257 | } | |
258 | } | |
259 | } | |
260 | ||
261 | usage() | |
262 | { | |
263 | fprintf(stderr, "Usage: %s [user]\n", whoami); | |
264 | exit(1); | |
265 | } | |
fa00aa12 | 266 | |
0ffa8026 | 267 | #if defined(ultrix) || defined(_AIX) || defined(sgi) |
fa00aa12 | 268 | char *getusershell() |
269 | { | |
270 | static int count = 1; | |
271 | ||
272 | switch (count++) { | |
273 | case 1: | |
274 | return("/bin/sh"); | |
275 | case 2: | |
276 | return("/bin/csh"); | |
277 | case 3: | |
0ffa8026 | 278 | return("/bin/athena/tcsh"); |
279 | case 4: | |
fa00aa12 | 280 | return(NULL); |
281 | default: | |
282 | count = 1; | |
283 | return(getusershell()); | |
284 | } | |
285 | } | |
a2ff3b56 | 286 | #endif |