ccs/admin/adduser.c

// Douglas Thrift
//
// CCS Computer Science
//   Add User
//
// $Id$

#include "common.h"

#include <errno.h>
#include <stdbool.h>
#include <sys/resource.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

#ifdef _Master_
#include <fts.h>

static int compare(const char **key, const char **item)
{
        return strcmp(*key, *item);
}

static bool exists(const char *program, const char *user, jmp_buf environment)
{
        int pipe_[2];

        check(pipe(pipe_), environment);

        pid_t ldapsearch;

        if (!(ldapsearch = check(fork(), environment)))
        {
                check(dup2(pipe_[1], 1), environment);
                check(close(pipe_[0]), environment);

                char uid[strlen(user) + 5];

                sprintf(uid, "uid=%s", user);
                check(execl(LDAPSEARCH, program, "-b", "ou=People,dc=ccs,dc=ucsb,dc=edu", "-H", "ldaps://" MASTER, "-LLL", "-x", uid, "1.1", NULL), environment);
        }

        check(close(pipe_[1]), environment);

        FILE *ldapsearch_ = fdopen(pipe_[0], "r");
        size_t size;
        char *uid = fcheck(fgetln(ldapsearch_, &size), ldapsearch_, environment);
        int status;

        check(waitpid(ldapsearch, &status, 0), environment);

        char user_[strlen(user) + 41];

        sprintf(user_, "dn: uid=%s,ou=People,dc=ccs,dc=ucsb,dc=edu", user);

        if (size != 0 && !strncmp(user_, uid, size - 1))
                return true;

        static const char *users[] = {
        #       include "users.h"
        };

        if (bsearch(&user, users, sizeof (users) / sizeof (*users), sizeof (*users), (int (*)(const void *, const void *))compare))
                return true;

        return false;
}
#endif

int main(int argc, char *argv[])
{
        if (argc < 1)
                return 1;

        umask(S_IWGRP | S_IWOTH);
        
        int exception;
        jmp_buf environment;

        switch (exception = setjmp(environment))
        {
        case 0:
                break;
        case 1:
                perror(argv[0]);

                return 1;
        default:
                fprintf(stderr, "%s: %s\n", argv[0], (char *)exception);

                return 1;
        }

#ifdef _Master_
        regex_t user_, name_;

        regcheck(regcomp(&user_, "^-user=([a-z0-9]{1,16})$", REG_EXTENDED), &user_, environment);
        regcheck(regcomp(&name_, "^-name=([^:]+)$", REG_EXTENDED), &name_, environment);

        char user[MAXLOGNAME] = "", *name = NULL;

        for (int index = 1; index != argc; ++index)
        {
                regmatch_t match[2];

                if (!regcheck(regexec(&user_, argv[index], 2, match, 0), &user_, environment))
                        strlcpy(user, argv[index] + match[1].rm_so, match[1].rm_eo - match[1].rm_so + 1);
                else if (!regcheck(regexec(&name_, argv[index], 2, match, 0), &name_, environment))
                        name = argv[index] + match[1].rm_so;
                else
                {
                        printf("Usage: %s [-user=user] [-name=name]\n", argv[0]);

                        return 1;
                }
        }

        regfree(&user_);
        regfree(&name_);
        authenticate(argv[0], environment);

        if (!strlen(user))
        {
                regcheck(regcomp(&user_, "^[a-z0-9]{1,16}$", REG_EXTENDED), &user_, environment);

                do
                {
                        printf("User Name: ");

                        size_t size;
                        char *user_ = fcheck(fgetln(stdin, &size), stdin, environment);

                        strlcpy(user, user_, size < sizeof (user) ? size : sizeof (user));
                }
                while (regcheck(regexec(&user_, user, 0, NULL, 0), &user_, environment) || (exists(argv[0], user, environment) && fprintf(stderr, "%s: User exists\n", argv[0])));

                regfree(&user_);
        }
        else if (exists(argv[0], user, environment))
                longjmp(environment, (int)"User exists");

        if (!name)
        {
                regcheck(regcomp(&name_, "^[^:]+$", REG_EXTENDED), &name_, environment);
                get("Full Name", &name_, &name, environment);
                regfree(&name_);
        }

        char password[_PASSWORD_LEN];

        getpassword(password, environment);
        check(setuid(geteuid()), environment);

        char slappasswd[] = "/tmp/slappasswd.XXXXXX";

        putpassword(password, slappasswd, environment);

        int pipe_[2];

        check(pipe(pipe_), environment);

        pid_t bash_;

        if (!(bash_ = check(fork(), environment)))
        {
                check(dup2(pipe_[0], 0), environment);
                check(close(pipe_[1]), environment);
                check(setenv("USER", user, 1), environment);
                check(setenv("NAME", name, 1), environment);
                check(setenv("FILE", slappasswd, 1), environment);
                setshells(shells + bash, environment);
                check(execl("/ccs/bin/adduser.sh", argv[0], NULL), environment);
        }

        check(close(pipe_[0]), environment);

        FILE *smbpasswd = fdopen(pipe_[1], "w");

        if (fprintf(smbpasswd, "%s\n%s\n", password, password) < 0)
                longjmp(environment, 1);

        if (fclose(smbpasswd))
                longjmp(environment, 1);

        int status;

        check(waitpid(bash_, &status, 0), environment);
        check(unlink(slappasswd), environment);

        if (WEXITSTATUS(status))
                return 1;

        struct passwd *entry = getpwnam(user);

        if (!entry)
                longjmp(environment, 1);

        check(mkdir(entry->pw_dir, S_IRWXU | S_IRWXG | S_IRWXO), environment);
        check(chown(entry->pw_dir, entry->pw_uid, entry->pw_gid), environment);
        check(chdir(entry->pw_dir), environment);

        FTS *traversal = fts_open((char *[]){ "/usr/share/skel", "/ccs/skel", NULL }, FTS_LOGICAL | FTS_NOCHDIR, NULL);

        if (!traversal)
                longjmp(environment, 1);

        FTSENT *entity;

        while ((entity = fts_read(traversal)))
                switch (entity->fts_info)
                {
                case FTS_D:
                        if (entity->fts_level != FTS_ROOTLEVEL)
                        {
                                check(mkdir(entity->fts_name, entity->fts_statp->st_mode), environment);
                                check(chown(entity->fts_name, entry->pw_uid, entry->pw_gid), environment);
                                check(chdir(entity->fts_name), environment);
                        }

                        break;
                case FTS_DP:
                        if (entity->fts_level != FTS_ROOTLEVEL)
                                check(chdir(".."), environment);

                        break;
                case FTS_F:
                        {
                                int output = check(open(strncmp(entity->fts_name, "dot", 3) ? entity->fts_name : entity->fts_name + 3, O_WRONLY | O_CREAT | O_EXCL, entity->fts_statp->st_mode), environment), input = check(open(entity->fts_accpath, O_RDONLY), environment);
                                char buffer[entity->fts_statp->st_blksize];
                                size_t size;

                                while ((size = check(read(input, buffer, sizeof (buffer)), environment)))
                                        check(write(output, buffer, size), environment);

                                check(fchown(output, entry->pw_uid, entry->pw_gid), environment);
                                check(close(output), environment);
                                check(close(input), environment);
                        }

                        break;
                }

        if (errno)
                longjmp(environment, 1);

        if (fts_close(traversal))
                longjmp(environment, 1);
#else
        longjmp(environment, (int)"Log in to " MASTER " to add users");
#endif

        return 0;
}
Revision:	1
Committed:	2006-07-13T16:11:11-07:00 (18 years, 11 months ago) by douglas
Content type:	text/x-c
File size:	6108 byte(s)
Log Message:	Moved this stuff from http://svn.douglasthrift.net/svn/repos/ to here.
#	User	Rev	Content
1	douglas	1	// Douglas Thrift
2			//
3			// CCS Computer Science
4			// Add User
5			//
6			// $Id$
7
8			#include "common.h"
9
10			#include <errno.h>
11			#include <stdbool.h>
12			#include <sys/resource.h>
13			#include <sys/time.h>
14			#include <sys/types.h>
15			#include <sys/stat.h>
16			#include <fcntl.h>
17
18			#ifdef _Master_
19			#include <fts.h>
20
21			static int compare(const char key, const char item)
22			{
23			return strcmp(key, item);
24			}
25
26			static bool exists(const char program, const char user, jmp_buf environment)
27			{
28			int pipe_[2];
29
30			check(pipe(pipe_), environment);
31
32			pid_t ldapsearch;
33
34			if (!(ldapsearch = check(fork(), environment)))
35			{
36			check(dup2(pipe_[1], 1), environment);
37			check(close(pipe_[0]), environment);
38
39			char uid[strlen(user) + 5];
40
41			sprintf(uid, "uid=%s", user);
42			check(execl(LDAPSEARCH, program, "-b", "ou=People,dc=ccs,dc=ucsb,dc=edu", "-H", "ldaps://" MASTER, "-LLL", "-x", uid, "1.1", NULL), environment);
43			}
44
45			check(close(pipe_[1]), environment);
46
47			FILE *ldapsearch_ = fdopen(pipe_[0], "r");
48			size_t size;
49			char *uid = fcheck(fgetln(ldapsearch_, &size), ldapsearch_, environment);
50			int status;
51
52			check(waitpid(ldapsearch, &status, 0), environment);
53
54			char user_[strlen(user) + 41];
55
56			sprintf(user_, "dn: uid=%s,ou=People,dc=ccs,dc=ucsb,dc=edu", user);
57
58			if (size != 0 && !strncmp(user_, uid, size - 1))
59			return true;
60
61			static const char *users[] = {
62			# include "users.h"
63			};
64
65			if (bsearch(&user, users, sizeof (users) / sizeof (users), sizeof (users), (int ()(const void , const void *))compare))
66			return true;
67
68			return false;
69			}
70			#endif
71
72			int main(int argc, char *argv[])
73			{
74			if (argc < 1)
75			return 1;
76
77			umask(S_IWGRP \| S_IWOTH);
78
79			int exception;
80			jmp_buf environment;
81
82			switch (exception = setjmp(environment))
83			{
84			case 0:
85			break;
86			case 1:
87			perror(argv[0]);
88
89			return 1;
90			default:
91			fprintf(stderr, "%s: %s\n", argv[0], (char *)exception);
92
93			return 1;
94			}
95
96			#ifdef _Master_
97			regex_t user_, name_;
98
99			regcheck(regcomp(&user_, "^-user=([a-z0-9]{1,16})$", REG_EXTENDED), &user_, environment);
100			regcheck(regcomp(&name_, "^-name=([^:]+)$", REG_EXTENDED), &name_, environment);
101
102			char user[MAXLOGNAME] = "", *name = NULL;
103
104			for (int index = 1; index != argc; ++index)
105			{
106			regmatch_t match[2];
107
108			if (!regcheck(regexec(&user_, argv[index], 2, match, 0), &user_, environment))
109			strlcpy(user, argv[index] + match[1].rm_so, match[1].rm_eo - match[1].rm_so + 1);
110			else if (!regcheck(regexec(&name_, argv[index], 2, match, 0), &name_, environment))
111			name = argv[index] + match[1].rm_so;
112			else
113			{
114			printf("Usage: %s [-user=user] [-name=name]\n", argv[0]);
115
116			return 1;
117			}
118			}
119
120			regfree(&user_);
121			regfree(&name_);
122			authenticate(argv[0], environment);
123
124			if (!strlen(user))
125			{
126			regcheck(regcomp(&user_, "^[a-z0-9]{1,16}$", REG_EXTENDED), &user_, environment);
127
128			do
129			{
130			printf("User Name: ");
131
132			size_t size;
133			char *user_ = fcheck(fgetln(stdin, &size), stdin, environment);
134
135			strlcpy(user, user_, size < sizeof (user) ? size : sizeof (user));
136			}
137			while (regcheck(regexec(&user_, user, 0, NULL, 0), &user_, environment) \|\| (exists(argv[0], user, environment) && fprintf(stderr, "%s: User exists\n", argv[0])));
138
139			regfree(&user_);
140			}
141			else if (exists(argv[0], user, environment))
142			longjmp(environment, (int)"User exists");
143
144			if (!name)
145			{
146			regcheck(regcomp(&name_, "^[^:]+$", REG_EXTENDED), &name_, environment);
147			get("Full Name", &name_, &name, environment);
148			regfree(&name_);
149			}
150
151			char password[_PASSWORD_LEN];
152
153			getpassword(password, environment);
154			check(setuid(geteuid()), environment);
155
156			char slappasswd[] = "/tmp/slappasswd.XXXXXX";
157
158			putpassword(password, slappasswd, environment);
159
160			int pipe_[2];
161
162			check(pipe(pipe_), environment);
163
164			pid_t bash_;
165
166			if (!(bash_ = check(fork(), environment)))
167			{
168			check(dup2(pipe_[0], 0), environment);
169			check(close(pipe_[1]), environment);
170			check(setenv("USER", user, 1), environment);
171			check(setenv("NAME", name, 1), environment);
172			check(setenv("FILE", slappasswd, 1), environment);
173			setshells(shells + bash, environment);
174			check(execl("/ccs/bin/adduser.sh", argv[0], NULL), environment);
175			}
176
177			check(close(pipe_[0]), environment);
178
179			FILE *smbpasswd = fdopen(pipe_[1], "w");
180
181			if (fprintf(smbpasswd, "%s\n%s\n", password, password) < 0)
182			longjmp(environment, 1);
183
184			if (fclose(smbpasswd))
185			longjmp(environment, 1);
186
187			int status;
188
189			check(waitpid(bash_, &status, 0), environment);
190			check(unlink(slappasswd), environment);
191
192			if (WEXITSTATUS(status))
193			return 1;
194
195			struct passwd *entry = getpwnam(user);
196
197			if (!entry)
198			longjmp(environment, 1);
199
200			check(mkdir(entry->pw_dir, S_IRWXU \| S_IRWXG \| S_IRWXO), environment);
201			check(chown(entry->pw_dir, entry->pw_uid, entry->pw_gid), environment);
202			check(chdir(entry->pw_dir), environment);
203
204			FTS traversal = fts_open((char []){ "/usr/share/skel", "/ccs/skel", NULL }, FTS_LOGICAL \| FTS_NOCHDIR, NULL);
205
206			if (!traversal)
207			longjmp(environment, 1);
208
209			FTSENT *entity;
210
211			while ((entity = fts_read(traversal)))
212			switch (entity->fts_info)
213			{
214			case FTS_D:
215			if (entity->fts_level != FTS_ROOTLEVEL)
216			{
217			check(mkdir(entity->fts_name, entity->fts_statp->st_mode), environment);
218			check(chown(entity->fts_name, entry->pw_uid, entry->pw_gid), environment);
219			check(chdir(entity->fts_name), environment);
220			}
221
222			break;
223			case FTS_DP:
224			if (entity->fts_level != FTS_ROOTLEVEL)
225			check(chdir(".."), environment);
226
227			break;
228			case FTS_F:
229			{
230			int output = check(open(strncmp(entity->fts_name, "dot", 3) ? entity->fts_name : entity->fts_name + 3, O_WRONLY \| O_CREAT \| O_EXCL, entity->fts_statp->st_mode), environment), input = check(open(entity->fts_accpath, O_RDONLY), environment);
231			char buffer[entity->fts_statp->st_blksize];
232			size_t size;
233
234			while ((size = check(read(input, buffer, sizeof (buffer)), environment)))
235			check(write(output, buffer, size), environment);
236
237			check(fchown(output, entry->pw_uid, entry->pw_gid), environment);
238			check(close(output), environment);
239			check(close(input), environment);
240			}
241
242			break;
243			}
244
245			if (errno)
246			longjmp(environment, 1);
247
248			if (fts_close(traversal))
249			longjmp(environment, 1);
250			#else
251			longjmp(environment, (int)"Log in to " MASTER " to add users");
252			#endif
253
254			return 0;
255			}