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;

        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 _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, 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", 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:	567
Committed:	2005-08-28T22:42:38-07:00 (19 years, 9 months ago) by douglas
Content type:	text/x-c
File size:	4617 byte(s)
Log Message:	Umask and portability, just in case the HURD takes over. Nooooooooooo!
#	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	douglas	567
22			umask(S_IWGRP \| S_IWOTH);
23	douglas	564
24	douglas	562	int exception;
25			jmp_buf environment;
26
27			switch (exception = setjmp(environment))
28			{
29			case 0:
30			break;
31			case 1:
32			perror(argv[0]);
33
34			return 1;
35			default:
36			fprintf(stderr, "%s: %s\n", argv[0], (char *)exception);
37
38			return 1;
39			}
40
41			#ifdef _Zweihander_
42			regex_t user_, name_;
43
44			regcheck(regcomp(&user_, "^-user=([a-z0-9]{1,16})$", REG_EXTENDED), &user_, environment);
45			regcheck(regcomp(&name_, "^-name=([^:]+)$", REG_EXTENDED), &name_, environment);
46
47			char user[MAXLOGNAME] = "", *name = NULL;
48	douglas	564
49	douglas	562	for (int index = 1; index != argc; ++index)
50			{
51			regmatch_t match[2];
52
53			if (!regcheck(regexec(&user_, argv[index], 2, match, 0), &user_, environment))
54			strlcpy(user, argv[index] + match[1].rm_so, match[1].rm_eo - match[1].rm_so + 1);
55			else if (!regcheck(regexec(&name_, argv[index], 2, match, 0), &name_, environment))
56			name = argv[index] + match[1].rm_so;
57			else
58			{
59			printf("Usage: %s [-user=user] [-name=name]\n", argv[0]);
60
61			return 1;
62			}
63			}
64
65			regfree(&user_);
66			regfree(&name_);
67			authenticate(argv[0], environment);
68
69			if (!strlen(user))
70			{
71			regcheck(regcomp(&user_, "^[a-z0-9]{1,16}$", REG_EXTENDED), &user_, environment);
72
73			do
74			{
75			printf("User Name: ");
76
77			size_t size;
78			char *user_ = fcheck(fgetln(stdin, &size), stdin, environment);
79
80			strlcpy(user, user_, size < sizeof (user) ? size : sizeof (user));
81			}
82			while (regcheck(regexec(&user_, user, 0, NULL, 0), &user_, environment));
83
84			regfree(&user_);
85			}
86
87			if (!name)
88			{
89			regcheck(regcomp(&name_, "^[^:]+$", REG_EXTENDED), &name_, environment);
90	douglas	563	get("Full Name", &name_, &name, environment);
91	douglas	562	regfree(&name_);
92			}
93
94			char password[_PASSWORD_LEN];
95
96			getpassword(password, environment);
97			check(setuid(geteuid()), environment);
98
99			char slappasswd[] = "/tmp/slappasswd.XXXXXX";
100
101			putpassword(password, slappasswd, environment);
102
103			int pipe_[2];
104
105			check(pipe(pipe_), environment);
106
107			pid_t bash;
108
109			if (!(bash = check(fork(), environment)))
110			{
111			check(dup2(pipe_[0], 0), environment);
112			check(close(pipe_[1]), environment);
113			check(setenv("USER", user, 1), environment);
114			check(setenv("NAME", name, 1), environment);
115			check(setenv("FILE", slappasswd, 1), environment);
116			check(execl("/ccs/bin/adduser.sh", argv[0], NULL), environment);
117			}
118
119			check(close(pipe_[0]), environment);
120
121			FILE *smbpasswd = fdopen(pipe_[1], "w");
122
123			if (fprintf(smbpasswd, "%s\n%s\n", password, password) < 0)
124			longjmp(environment, 1);
125
126			if (fclose(smbpasswd))
127			longjmp(environment, 1);
128
129			int status;
130
131			check(waitpid(bash, &status, 0), environment);
132			check(unlink(slappasswd), environment);
133
134			if (WEXITSTATUS(status))
135			return 1;
136
137			struct passwd *entry = getpwnam(user);
138
139			if (!entry)
140			longjmp(environment, 1);
141
142	douglas	567	check(mkdir(entry->pw_dir, S_IRWXU \| S_IRWXG \| S_IRWXO), environment);
143	douglas	562	check(chown(entry->pw_dir, entry->pw_uid, entry->pw_gid), environment);
144	douglas	566	check(chdir(entry->pw_dir), environment);
145
146			FTS traversal = fts_open((char []){ "/usr/share/skel", NULL }, FTS_LOGICAL \| FTS_NOCHDIR, NULL);
147
148			if (!traversal)
149			longjmp(environment, 1);
150
151			FTSENT *entity;
152
153			while ((entity = fts_read(traversal)))
154			switch (entity->fts_info)
155			{
156			case FTS_D:
157			if (entity->fts_level != FTS_ROOTLEVEL)
158			{
159			check(mkdir(entity->fts_name, entity->fts_statp->st_mode), environment);
160			check(chown(entity->fts_name, entry->pw_uid, entry->pw_gid), environment);
161			check(chdir(entity->fts_name), environment);
162			}
163
164			break;
165			case FTS_DP:
166			if (entity->fts_level != FTS_ROOTLEVEL)
167			check(chdir(".."), environment);
168
169			break;
170			case FTS_F:
171			{
172			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);
173			char buffer[entity->fts_statp->st_blksize];
174			size_t size;
175
176			while ((size = check(read(input, buffer, sizeof (buffer)), environment)))
177			check(write(output, buffer, size), environment);
178
179			check(fchown(output, entry->pw_uid, entry->pw_gid), environment);
180			check(close(output), environment);
181			check(close(input), environment);
182			}
183
184			break;
185			}
186
187			if (errno)
188			longjmp(environment, 1);
189
190			if (fts_close(traversal))
191			longjmp(environment, 1);
192	douglas	562	#else
193			longjmp(environment, (int)"Log in to zweihander.ccs.ucsb.edu to add users");
194			#endif
195
196			return 0;
197			}