ViewVC Help

View File | Revision Log | Show Annotations | Download File | View Changeset | Root Listing

root/repos/CCSAdmin/chsh.c

Comparing CCSAdmin/chsh.c (file contents):
Revision 562 by douglas, 2005-08-27T21:46:39-07:00 vs.
Revision 563 by douglas, 2005-08-28T01:55:06-07:00

#	Line 27 | Line 27 | int main(int argc, char *argv[])
27		return 1;
28		}
29
30	+	char user[MAXLOGNAME] = "", *shell = NULL;
31	+	regex_t shell_;
32	+
33		typedef struct
34		{
35		const char *name;
36		char *freebsd, *linux, *darwin;
37		}
38	<	Shell;
38	>	Shells;
39
40	<	typedef enum { sh, csh, tcsh, bash, ksh, zsh, _3sh, custom } Shells;
40	>	typedef enum { sh, csh, tcsh, bash, ksh, zsh, _3sh, custom } Shell;
41
42	<	Shell shells[] = {
42	>	Shells shells[] = {
43		{ "sh", "/bin/sh", "/bin/sh", "/bin/sh" },
44		{ "csh", "/bin/csh", "/bin/csh", "/bin/csh" },
45		{ "tcsh", "/bin/tcsh", "/bin/tcsh", "/bin/tcsh" },
#	Line 47 | Line 50 | int main(int argc, char *argv[])
50		{ "custom", NULL, NULL, NULL }
51		};
52
53	<	for (Shells shell = sh; shell != custom; ++shell)
54	<	printf("%s, ", shells[shell].name);
53	>	char *shell_regex = NULL;
54	>
55	>	{
56	>	size_t size = 0;
57	>
58	>	for (Shell shell = sh; shell <= custom; ++shell)
59	>	{
60	>	shell_regex = shell_regex ? realloc(shell_regex, size += strlen(shells[shell].name) + (shell != custom ? 2 : 1)) : calloc(size += strlen(shells[shell].name) + 2, 1);
61	>	strlcat(shell_regex, shells[shell].name, size);
62	>
63	>	if (shell != custom)
64	>	strlcat(shell_regex, "|", size);
65	>	}
66	>	}
67	>
68	>	char shell_regex_[strlen(shell_regex) + 12];
69	>
70	>	sprintf(shell_regex_, "^-shell=(%s)$", shell_regex);
71	>	regcheck(regcomp(&shell_, shell_regex_, REG_EXTENDED), &shell_, environment);
72	>
73	>	if (!getuid())
74	>	{
75	>	regex_t user_;
76	>
77	>	regcheck(regcomp(&user_, "^-user=([a-z0-9]{1,16})$", REG_EXTENDED), &user_, environment);
78	>
79	>	for (int index = 1; index != argc; ++index)
80	>	{
81	>	regmatch_t match[2];
82	>
83	>	if (!regcheck(regexec(&user_, argv[index], 2, match, 0), &user_, environment))
84	>	strlcpy(user, argv[index] + match[1].rm_so, match[1].rm_eo - match[1].rm_so + 1);
85	>	else if (!regcheck(regexec(&shell_, argv[index], 2, match, 0), &shell_, environment))
86	>	shell = argv[index] + match[1].rm_so;
87	>	else
88	>	{
89	>	printf("Usage: %s -user=user [-shell=%s]\n", argv[0], shell_regex);
90	>
91	>	return 1;
92	>	}
93	>	}
94	>
95	>	regfree(&user_);
96	>
97	>	if (strlen(user))
98	>	goto on;
99	>	else
100	>	longjmp(environment, (int)"Cannot change root shell");
101	>	}
102	>	else
103	>	for (int index = 1; index != argc; ++index)
104	>	{
105	>	regmatch_t match[2];
106	>
107	>	if (!regcheck(regexec(&shell_, argv[index], 2, match, 0), &shell_, environment))
108	>	shell = argv[index] + match[1].rm_so;
109	>	else
110	>	{
111	>	printf("Usage: %s [-shell=%s]\n", argv[0], shell_regex);
112	>
113	>	return 1;
114	>	}
115	>	}
116	>
117	>	struct passwd *entry = getpwuid(getuid());
118	>
119	>	if (!entry)
120	>	longjmp(environment, 1);
121	>
122	>	strlcpy(user, entry->pw_name, sizeof (user));
123	>	on:     regfree(&shell_);
124	>	authenticate(argv[0], environment);
125	>
126	>	if (!shell)
127	>	{
128	>	sprintf(shell_regex_, "^%s$", shell_regex);
129	>	regcheck(regcomp(&shell_, shell_regex_, REG_EXTENDED), &shell_, environment);
130	>	do
131	>	{
132	>	printf("Shell (");
133	>
134	>	for (Shell shell = sh; shell <= custom; ++shell)
135	>	printf(shell != custom ? "%s, " : "%s): ", shells[shell].name);
136	>
137	>	size_t size;
138	>	char *shell_ = fcheck(fgetln(stdin, &size), stdin, environment);
139	>
140	>	shell = shell ? realloc(shell, size) : malloc(size);
141	>
142	>	strlcpy(shell, shell_, size);
143	>	}
144	>	while (regcheck(regexec(&shell_, shell, 0, NULL, 0), &shell_, environment));
145	>
146	>	regfree(&shell_);
147	>	}
148	>
149	>	free(shell_regex);
150	>
151	>	Shells *shells_ = shells + custom;
152	>
153	>	for (Shell shell_ = sh; shell_ != custom; ++shell_)
154	>	if (!strcmp(shell, shells[shell_].name))
155	>	{
156	>	shells_ = shells + shell_;
157	>
158	>	goto no;
159	>	}
160	>
161	>	regex_t path;
162	>
163	>	regcheck(regcomp(&path, "^/.*[^/]$", REG_EXTENDED), &path, environment);
164	>	get("FreeBSD", &path, &shells_->freebsd, environment);
165	>	get("Linux", &path, &shells_->linux, environment);
166	>	get("Darwin", &path, &shells_->darwin, environment);
167	>	regfree(&path);
168	>
169	>	no:     check(setuid(geteuid()), environment);
170	>
171	>	int pipe_[2];
172	>
173	>	check(pipe(pipe_), environment);
174	>
175	>	pid_t bash_;
176
177	<	printf("%s\n", shells[custom].name);
177	>	if (!(bash_ = check(fork(), environment)))
178	>	{
179	>	check(dup2(pipe_[0], 0), environment);
180	>	check(close(pipe_[1]), environment);
181	>	check(setenv("USER", user, 1), environment);
182	>	check(execl("/ccs/bin/chsh.sh", argv[0], NULL), environment);
183	>	}
184	>
185	>	check(close(pipe_[0]), environment);
186	>
187	>	FILE *sed = fdopen(pipe_[1], "w");
188	>
189	>	if (fprintf(sed, "%s\n%s\n%s\n", shells_->freebsd, shells_->linux, shells_->darwin) < 0)
190	>	longjmp(environment, 1);
191	>
192	>	if (fclose(sed))
193	>	longjmp(environment, 1);
194	>
195	>	int status;
196	>
197	>	check(waitpid(bash_, &status, 0), environment);
198	>
199	>	if (WEXITSTATUS(status))
200	>	return 1;
201
202		return 0;
203		}

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines