repos/CCSAdmin/adduser.c

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

#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:	807
Committed:	2006-06-29T07:39:29-07:00 (18 years, 11 months ago) by douglas
Content type:	text/x-c
File size:	6098 byte(s)
Log Message:	Yarg!
#	User	Rev	Content
1	douglas	562	// Douglas Thrift
2			//
3			// CCS Computer Science
4			//
5			// Add User
6
7	douglas	807	#include "common.h"
8	douglas	572
9	douglas	566	#include <errno.h>
10	douglas	807	#include <stdbool.h>
11	douglas	562	#include <sys/resource.h>
12			#include <sys/time.h>
13			#include <sys/types.h>
14	douglas	566	#include <sys/stat.h>
15			#include <fcntl.h>
16	douglas	584
17	douglas	806	#ifdef _Master_
18	douglas	566	#include <fts.h>
19	douglas	807
20			static int compare(const char key, const char item)
21			{
22			return strcmp(key, item);
23			}
24
25			static bool exists(const char program, const char user, jmp_buf environment)
26			{
27			int pipe_[2];
28
29			check(pipe(pipe_), environment);
30
31			pid_t ldapsearch;
32
33			if (!(ldapsearch = check(fork(), environment)))
34			{
35			check(dup2(pipe_[1], 1), environment);
36			check(close(pipe_[0]), environment);
37
38			char uid[strlen(user) + 5];
39
40			sprintf(uid, "uid=%s", user);
41			check(execl(LDAPSEARCH, program, "-b", "ou=People,dc=ccs,dc=ucsb,dc=edu", "-H", "ldaps://" MASTER, "-LLL", "-x", uid, "1.1", NULL), environment);
42			}
43
44			check(close(pipe_[1]), environment);
45
46			FILE *ldapsearch_ = fdopen(pipe_[0], "r");
47			size_t size;
48			char *uid = fcheck(fgetln(ldapsearch_, &size), ldapsearch_, environment);
49			int status;
50
51			check(waitpid(ldapsearch, &status, 0), environment);
52
53			char user_[strlen(user) + 41];
54
55			sprintf(user_, "dn: uid=%s,ou=People,dc=ccs,dc=ucsb,dc=edu", user);
56
57			if (size != 0 && !strncmp(user_, uid, size - 1))
58			return true;
59
60			static const char *users[] = {
61			# include "users.h"
62			};
63
64			if (bsearch(&user, users, sizeof (users) / sizeof (users), sizeof (users), (int ()(const void , const void *))compare))
65			return true;
66
67			return false;
68			}
69	douglas	584	#endif
70	douglas	562
71			int main(int argc, char *argv[])
72			{
73	douglas	564	if (argc < 1)
74			return 1;
75	douglas	567
76			umask(S_IWGRP \| S_IWOTH);
77	douglas	564
78	douglas	562	int exception;
79			jmp_buf environment;
80
81			switch (exception = setjmp(environment))
82			{
83			case 0:
84			break;
85			case 1:
86			perror(argv[0]);
87
88			return 1;
89			default:
90			fprintf(stderr, "%s: %s\n", argv[0], (char *)exception);
91
92			return 1;
93			}
94
95	douglas	806	#ifdef _Master_
96	douglas	562	regex_t user_, name_;
97
98			regcheck(regcomp(&user_, "^-user=([a-z0-9]{1,16})$", REG_EXTENDED), &user_, environment);
99			regcheck(regcomp(&name_, "^-name=([^:]+)$", REG_EXTENDED), &name_, environment);
100
101			char user[MAXLOGNAME] = "", *name = NULL;
102	douglas	564
103	douglas	562	for (int index = 1; index != argc; ++index)
104			{
105			regmatch_t match[2];
106
107			if (!regcheck(regexec(&user_, argv[index], 2, match, 0), &user_, environment))
108			strlcpy(user, argv[index] + match[1].rm_so, match[1].rm_eo - match[1].rm_so + 1);
109			else if (!regcheck(regexec(&name_, argv[index], 2, match, 0), &name_, environment))
110			name = argv[index] + match[1].rm_so;
111			else
112			{
113			printf("Usage: %s [-user=user] [-name=name]\n", argv[0]);
114
115			return 1;
116			}
117			}
118
119			regfree(&user_);
120			regfree(&name_);
121			authenticate(argv[0], environment);
122
123			if (!strlen(user))
124			{
125			regcheck(regcomp(&user_, "^[a-z0-9]{1,16}$", REG_EXTENDED), &user_, environment);
126
127			do
128			{
129			printf("User Name: ");
130
131			size_t size;
132			char *user_ = fcheck(fgetln(stdin, &size), stdin, environment);
133
134			strlcpy(user, user_, size < sizeof (user) ? size : sizeof (user));
135			}
136	douglas	807	while (regcheck(regexec(&user_, user, 0, NULL, 0), &user_, environment) \|\| (exists(argv[0], user, environment) && fprintf(stderr, "%s: User exists\n", argv[0])));
137	douglas	562
138			regfree(&user_);
139			}
140	douglas	807	else if (exists(argv[0], user, environment))
141			longjmp(environment, (int)"User exists");
142	douglas	562
143			if (!name)
144			{
145			regcheck(regcomp(&name_, "^[^:]+$", REG_EXTENDED), &name_, environment);
146	douglas	563	get("Full Name", &name_, &name, environment);
147	douglas	562	regfree(&name_);
148			}
149
150			char password[_PASSWORD_LEN];
151
152			getpassword(password, environment);
153			check(setuid(geteuid()), environment);
154
155			char slappasswd[] = "/tmp/slappasswd.XXXXXX";
156
157			putpassword(password, slappasswd, environment);
158
159			int pipe_[2];
160
161			check(pipe(pipe_), environment);
162
163	douglas	691	pid_t bash_;
164	douglas	562
165	douglas	691	if (!(bash_ = check(fork(), environment)))
166	douglas	562	{
167			check(dup2(pipe_[0], 0), environment);
168			check(close(pipe_[1]), environment);
169			check(setenv("USER", user, 1), environment);
170			check(setenv("NAME", name, 1), environment);
171			check(setenv("FILE", slappasswd, 1), environment);
172	douglas	583	setshells(shells + bash, environment);
173	douglas	562	check(execl("/ccs/bin/adduser.sh", argv[0], NULL), environment);
174			}
175
176			check(close(pipe_[0]), environment);
177
178			FILE *smbpasswd = fdopen(pipe_[1], "w");
179
180			if (fprintf(smbpasswd, "%s\n%s\n", password, password) < 0)
181			longjmp(environment, 1);
182
183			if (fclose(smbpasswd))
184			longjmp(environment, 1);
185
186			int status;
187
188	douglas	691	check(waitpid(bash_, &status, 0), environment);
189	douglas	562	check(unlink(slappasswd), environment);
190
191			if (WEXITSTATUS(status))
192			return 1;
193
194			struct passwd *entry = getpwnam(user);
195
196			if (!entry)
197			longjmp(environment, 1);
198
199	douglas	567	check(mkdir(entry->pw_dir, S_IRWXU \| S_IRWXG \| S_IRWXO), environment);
200	douglas	562	check(chown(entry->pw_dir, entry->pw_uid, entry->pw_gid), environment);
201	douglas	566	check(chdir(entry->pw_dir), environment);
202
203	douglas	579	FTS traversal = fts_open((char []){ "/usr/share/skel", "/ccs/skel", NULL }, FTS_LOGICAL \| FTS_NOCHDIR, NULL);
204	douglas	566
205			if (!traversal)
206			longjmp(environment, 1);
207
208			FTSENT *entity;
209
210			while ((entity = fts_read(traversal)))
211			switch (entity->fts_info)
212			{
213			case FTS_D:
214			if (entity->fts_level != FTS_ROOTLEVEL)
215			{
216			check(mkdir(entity->fts_name, entity->fts_statp->st_mode), environment);
217			check(chown(entity->fts_name, entry->pw_uid, entry->pw_gid), environment);
218			check(chdir(entity->fts_name), environment);
219			}
220
221			break;
222			case FTS_DP:
223			if (entity->fts_level != FTS_ROOTLEVEL)
224			check(chdir(".."), environment);
225
226			break;
227			case FTS_F:
228			{
229			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);
230			char buffer[entity->fts_statp->st_blksize];
231			size_t size;
232
233			while ((size = check(read(input, buffer, sizeof (buffer)), environment)))
234			check(write(output, buffer, size), environment);
235
236			check(fchown(output, entry->pw_uid, entry->pw_gid), environment);
237			check(close(output), environment);
238			check(close(input), environment);
239			}
240
241			break;
242			}
243
244			if (errno)
245			longjmp(environment, 1);
246
247			if (fts_close(traversal))
248			longjmp(environment, 1);
249	douglas	562	#else
250	douglas	806	longjmp(environment, (int)"Log in to " MASTER " to add users");
251	douglas	562	#endif
252
253			return 0;
254			}