summaryrefslogtreecommitdiffstats
path: root/util/bbsctl.c
blob: 31ab69bf7c59bc63634ba24781c1fea00599a221 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <signal.h>
#include <sys/types.h>
#include <dirent.h>
#include <grp.h>
#include <fcntl.h>
#include <ctype.h>
#include "config.h"
#include "pttstruct.h"
#include "perm.h"

#ifdef __FreeBSD__
   #include <sys/syslimits.h>
   #define  SU      "/usr/bin/su" 
   #define  CP      "/bin/cp"
   #define  KILLALL "/usr/bin/killall"
   #define  IPCS    "/usr/bin/ipcs"
   #define  IPCRM   "/usr/bin/ipcrm"
   #define  AWK     "/usr/bin/awk"
#endif
#ifdef __linux__
   #include <linux/limits.h>
   #define  SU      "/bin/su"
   #define  CP      "/bin/cp"
   #define  KILLALL "/usr/bin/killall"
   #define  IPCS    "/usr/bin/ipcs"
   #define  IPCRM   "/usr/bin/ipcrm"
   #define  AWK     "/usr/bin/awk"
#endif

int HaveBBSADM(void)
{
    gid_t   gids[NGROUPS_MAX];
    int     i, ngids;
    struct  group *gr; 

    if( getuid() == 0 || getuid() == BBSUID )
    return 1;

    ngids = getgroups(NGROUPS_MAX, gids);
    if( (gr = getgrnam("bbsadm")) == NULL ){
    puts("group bbsadm not found");
    return 0;
    }

    for( i = 0 ; i < ngids ; ++i )
    if( gr->gr_gid == (int)gids[i] )
            return 1;

    return 0;
}

int startbbs(int argc, char **argv)
{
    int     i;
    char    *port[] = {"3000", "3001", "3002", "3003", "3004", "3005",
               "3006", "3007", "3008", "3009", "3010", NULL};
    pid_t   pid;

    for( i = 0 ; port[i] != NULL ; ++i ){
    if( (pid = fork()) < 0 ){
        perror("fork()");
        return 1;
    }
    else if( pid == 0 ){
        printf("starting mbbsd at port %s\n", port[i]);
        execl(BBSHOME "/bin/mbbsd", "mbbsd", port[i], NULL);
        printf("start port[%s] failed\n", port[i]);
        return 1;
    }
    }

    if( setuid(0) < 0 ){
    perror("setuid(0)");
    exit(1);
    }
    printf("starting mbbsd at port %s\n", "23");
    execl(BBSHOME "/bin/mbbsd", "mbbsd", "23", NULL);
    printf("start port[%s] failed\n", "23");
    return 1;
}

int stopbbs(int argc, char **argv)
{
    DIR     *dirp;
    struct  dirent *de;    
    FILE    *fp;
    char    buf[512], fn[512];
    if( !(dirp = opendir("run")) ){
    perror("open " BBSHOME "/run");
    exit(0);
    }

    while( (de = readdir(dirp)) ){
    if( strstr(de->d_name, "mbbsd") && strstr(de->d_name, "pid")){
        sprintf(fn, BBSHOME "/run/%s", de->d_name);
        if( (fp = fopen(fn, "r")) != NULL ){
        if( fgets(buf, sizeof(buf), fp) != NULL ){
            printf("stopping listening-mbbsd at pid %5d\n", atoi(buf));
            kill(atoi(buf), 9);
        }
        fclose(fp);
        unlink(fn);
        }
    }
    }

    closedir(dirp);
    return 0;
}

int STOP(int argc, char **argv)
{
    DIR     *dirp;
    struct  dirent *de;    
    FILE    *fp;
    char    buf[512];
    if( !(dirp = opendir("/proc")) ){
    perror("open /proc");
    exit(0);
    }

    while( (de = readdir(dirp)) ){
    if( de->d_type & DT_DIR ){
        sprintf(buf, "/proc/%s/cmdline", de->d_name);
        if( (fp = fopen(buf, "r")) ){
        if( fgets(buf, sizeof(buf), fp) != NULL ){
            if( strstr(buf, "mbbsd") ){
            kill(atoi(de->d_name), 1);
            printf("stopping mbbsd at pid %5d\n",
                   atoi(de->d_name));
            }
        }
        fclose(fp);
        }
    }
    }

    closedir(dirp);
    return 0;
}

int restartbbs(int argc, char **argv)
{
    stopbbs(argc, argv);
    sleep(1);
    startbbs(argc, argv);
    return 0;
}

int bbsadm(int argc, char **argv)
{
    if( setuid(0) < 0 ){
    perror("setuid(0)");
    return 1;
    }
    puts("permission granted");
    execl(SU, "su", "bbsadm", NULL);
    return 0;
}

int bbstest(int argc, char **argv)
{
    if( access("mbbsd", 0) < 0 ){
    perror("./mbbsd");
    return 1;
    }
    system(CP " -f mbbsd testmbbsd");
    if( setuid(0) < 0 ){
    perror("setuid(0)");
    return 1;
    }
    if( setuid(9999) < 0 ){
    perror("setuid(9999)");
    return 1;
    }
    system(KILLALL " testmbbsd");
    execl("./testmbbsd", "testmbbsd", "9000", NULL);
    perror("execl()");
    return 0;
}

int Xipcrm(int argc, char **argv)
{
#ifdef __FreeBSD__
    char    buf[256], cmd[256];
    FILE    *fp;
    setuid(BBSUID); /* drop privileges so we don't remove other users' IPC */
    sprintf(buf, IPCS " | " AWK " '{print $1 $2}'");
    if( !(fp = popen(buf, "r")) ){
    perror(buf);
    return 1;
    }
    while( fgets(buf, sizeof(buf), fp) != NULL ){
    if( buf[0] == 't' || buf[0] == 'm' || buf[0] == 's' ){
        buf[strlen(buf) - 1] = 0;
        sprintf(cmd, IPCRM " -%c %s\n", buf[0], &buf[1]);
        system(cmd);
    }
    }
    pclose(fp);
    system(IPCS);
    return 0;
#elif defined(__linux__)
    char    buf[256], cmd[256], *type = "ms";
    FILE    *fp;
    setuid(BBSUID); /* drop privileges so we don't remove other users' IPC */
    for( ;*type != '\0';type++ ){
        sprintf(buf, IPCS " -%c | " AWK " '{print $2}'", *type);
        if( !(fp = popen(buf, "r")) ){
            perror(buf);
            return 1;
        }
        while( fgets(buf, sizeof(buf), fp) != NULL ){
            if( isdigit(buf[0]) ){
                buf[strlen(buf) - 1] = 0;
                sprintf(cmd, IPCRM " -%c %s\n", *type, buf);
                system(cmd);
            }
        }
        pclose(fp);
    }
    system(IPCS);
    return 0;
#else
    puts("not implement!");
    return 1;
#endif
}

int permreport(int argc, char **argv)
{
    int     fd, i, count;
    userec_t usr;
    struct {
    int     perm;
    char    *desc;
    } check[] = {{PERM_BBSADM,   "PERM_BBSADM"},
         {PERM_SYSOP,    "PERM_SYSOP"},
         {PERM_ACCOUNTS, "PERM_ACCOUNTS"},
         {PERM_SYSSUBOP, "PERM_SYSSUBOP"},
         {PERM_MANAGER,  "PERM_MANAGER"},
         {0, NULL}};

    if( (fd = open(".PASSWDS", O_RDONLY)) < 0 ){
    perror(".PASSWDS");
    return 1;
    }
    for( count = i = 0 ; check[i].perm != 0 ; ++i ){
    count = 0;
    lseek(fd, 0, SEEK_SET);
    printf("%s\n", check[i].desc);
    while( read(fd, &usr, sizeof(usr)) > 0 ){
        if( usr.userid[0] != 0 && isalpha(usr.userid[0]) &&
        usr.userlevel & check[i].perm ){
        ++count;
        printf("%-20s%-10s\n", usr.userid, usr.realname);
        }
    }
    printf("total %d users\n\n", count);
    }
    return 0;
}

struct {
    int     (*func)(int, char **);
    char    *cmd, *descript;
} cmds[] =
    { {startbbs,   "start",      "start mbbsd at port 23, 3000~3010"},
      {stopbbs,    "stop",       "killall listening mbbsd"},
      {restartbbs, "restart",    "stop and then start"},
      {bbsadm,     "bbsadm",     "switch to user: bbsadm"},
      {bbstest,    "test",       "run ./mbbsd as bbsadm"},
      {Xipcrm,     "ipcrm",      "ipcrm all msg, shm, sem"},
      {STOP,       "STOP",       "killall ALL mbbsd"},
      {permreport, "permreport", "permission report"},
      {NULL,       NULL,       NULL} };

int main(int argc, char **argv)
{
    int     i = 0;
    if( !HaveBBSADM() )
    return 1;
    if( argc >= 2 ){
    chdir(BBSHOME);
    for( i = 0 ; cmds[i].func != NULL ; ++i )
        if( strcmp(cmds[i].cmd, argv[1]) == 0 ){
        cmds[i].func(argc - 2, &argv[2]);
        break;
        }
    }
    if( argc == 1 || cmds[i].func == NULL ){
    /* usage */
    printf("usage: bbsctl [command] [options]\n");
    printf("commands:\n");
    for( i = 0 ; cmds[i].func != NULL ; ++i )
        printf("\t%-15s%s\n", cmds[i].cmd, cmds[i].descript);
    if ( geteuid() != 0 )
        printf("Warning: bbsctl should be SUID\n");
    }
    return 0;
}