repos/CCSAdmin/adduser.c

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

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

#include "common.h"

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

                regfree(&user_);
        }

        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);
                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, 0755), 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", 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 zweihander.ccs.ucsb.edu to add users");
#endif

        return 0;
}
Revision:	566
Committed:	2005-08-28T22:29:20-07:00 (19 years, 9 months ago) by douglas
Content type:	text/x-c
File size:	4566 byte(s)
Log Message:	Worky!
#	User	Rev	Content
1	douglas	562	// Douglas Thrift
2			//
3			// CCS Computer Science
4			//
5			// Add User
6
7	douglas	566	#include <errno.h>
8	douglas	562	#include <sys/resource.h>
9			#include <sys/time.h>
10			#include <sys/types.h>
11	douglas	566	#include <sys/stat.h>
12			#include <fcntl.h>
13			#include <fts.h>
14	douglas	562
15			#include "common.h"
16
17			int main(int argc, char *argv[])
18			{
19	douglas	564	if (argc < 1)
20			return 1;
21
22	douglas	562	int exception;
23			jmp_buf environment;
24
25			switch (exception = setjmp(environment))
26			{
27			case 0:
28			break;
29			case 1:
30			perror(argv[0]);
31
32			return 1;
33			default:
34			fprintf(stderr, "%s: %s\n", argv[0], (char *)exception);
35
36			return 1;
37			}
38
39			#ifdef _Zweihander_
40			regex_t user_, name_;
41
42			regcheck(regcomp(&user_, "^-user=([a-z0-9]{1,16})$", REG_EXTENDED), &user_, environment);
43			regcheck(regcomp(&name_, "^-name=([^:]+)$", REG_EXTENDED), &name_, environment);
44
45			char user[MAXLOGNAME] = "", *name = NULL;
46	douglas	564
47	douglas	562	for (int index = 1; index != argc; ++index)
48			{
49			regmatch_t match[2];
50
51			if (!regcheck(regexec(&user_, argv[index], 2, match, 0), &user_, environment))
52			strlcpy(user, argv[index] + match[1].rm_so, match[1].rm_eo - match[1].rm_so + 1);
53			else if (!regcheck(regexec(&name_, argv[index], 2, match, 0), &name_, environment))
54			name = argv[index] + match[1].rm_so;
55			else
56			{
57			printf("Usage: %s [-user=user] [-name=name]\n", argv[0]);
58
59			return 1;
60			}
61			}
62
63			regfree(&user_);
64			regfree(&name_);
65			authenticate(argv[0], environment);
66
67			if (!strlen(user))
68			{
69			regcheck(regcomp(&user_, "^[a-z0-9]{1,16}$", REG_EXTENDED), &user_, environment);
70
71			do
72			{
73			printf("User Name: ");
74
75			size_t size;
76			char *user_ = fcheck(fgetln(stdin, &size), stdin, environment);
77
78			strlcpy(user, user_, size < sizeof (user) ? size : sizeof (user));
79			}
80			while (regcheck(regexec(&user_, user, 0, NULL, 0), &user_, environment));
81
82			regfree(&user_);
83			}
84
85			if (!name)
86			{
87			regcheck(regcomp(&name_, "^[^:]+$", REG_EXTENDED), &name_, environment);
88	douglas	563	get("Full Name", &name_, &name, environment);
89	douglas	562	regfree(&name_);
90			}
91
92			char password[_PASSWORD_LEN];
93
94			getpassword(password, environment);
95			check(setuid(geteuid()), environment);
96
97			char slappasswd[] = "/tmp/slappasswd.XXXXXX";
98
99			putpassword(password, slappasswd, environment);
100
101			int pipe_[2];
102
103			check(pipe(pipe_), environment);
104
105			pid_t bash;
106
107			if (!(bash = check(fork(), environment)))
108			{
109			check(dup2(pipe_[0], 0), environment);
110			check(close(pipe_[1]), environment);
111			check(setenv("USER", user, 1), environment);
112			check(setenv("NAME", name, 1), environment);
113			check(setenv("FILE", slappasswd, 1), environment);
114			check(execl("/ccs/bin/adduser.sh", argv[0], NULL), environment);
115			}
116
117			check(close(pipe_[0]), environment);
118
119			FILE *smbpasswd = fdopen(pipe_[1], "w");
120
121			if (fprintf(smbpasswd, "%s\n%s\n", password, password) < 0)
122			longjmp(environment, 1);
123
124			if (fclose(smbpasswd))
125			longjmp(environment, 1);
126
127			int status;
128
129			check(waitpid(bash, &status, 0), environment);
130			check(unlink(slappasswd), environment);
131
132			if (WEXITSTATUS(status))
133			return 1;
134
135			struct passwd *entry = getpwnam(user);
136
137			if (!entry)
138			longjmp(environment, 1);
139
140			check(mkdir(entry->pw_dir, 0755), environment);
141			check(chown(entry->pw_dir, entry->pw_uid, entry->pw_gid), environment);
142	douglas	566	check(chdir(entry->pw_dir), environment);
143
144			FTS traversal = fts_open((char []){ "/usr/share/skel", NULL }, FTS_LOGICAL \| FTS_NOCHDIR, NULL);
145
146			if (!traversal)
147			longjmp(environment, 1);
148
149			FTSENT *entity;
150
151			while ((entity = fts_read(traversal)))
152			switch (entity->fts_info)
153			{
154			case FTS_D:
155			if (entity->fts_level != FTS_ROOTLEVEL)
156			{
157			check(mkdir(entity->fts_name, entity->fts_statp->st_mode), environment);
158			check(chown(entity->fts_name, entry->pw_uid, entry->pw_gid), environment);
159			check(chdir(entity->fts_name), environment);
160			}
161
162			break;
163			case FTS_DP:
164			if (entity->fts_level != FTS_ROOTLEVEL)
165			check(chdir(".."), environment);
166
167			break;
168			case FTS_F:
169			{
170			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);
171			char buffer[entity->fts_statp->st_blksize];
172			size_t size;
173
174			while ((size = check(read(input, buffer, sizeof (buffer)), environment)))
175			check(write(output, buffer, size), environment);
176
177			check(fchown(output, entry->pw_uid, entry->pw_gid), environment);
178			check(close(output), environment);
179			check(close(input), environment);
180			}
181
182			break;
183			}
184
185			if (errno)
186			longjmp(environment, 1);
187
188			if (fts_close(traversal))
189			longjmp(environment, 1);
190	douglas	562	#else
191			longjmp(environment, (int)"Log in to zweihander.ccs.ucsb.edu to add users");
192			#endif
193
194			return 0;
195			}