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
|
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <ctype.h>
#include <signal.h>
#include <fcntl.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netax25/ax25.h>
#include <netrose/rose.h>
#include <grp.h>
#include <sys/wait.h>
#include <netax25/axlib.h>
#include <netax25/axconfig.h>
#include "node.h"
#define ECMD_PIPE 1 /* Run through pipe */
#ifdef HAVEMOTD
#define ECMD_RECONN 2 /* */
#endif
static int norm_extcmd(struct cmd *cmdp, char **argv)
{
int pid;
alarm(0L);
pid = fork();
if (pid == -1) {
/* fork error */
node_perror("norm_extcmd: fork", errno);
return 0;
}
if (pid == 0) {
/* child */
setgroups(0, NULL);
setgid(cmdp->gid);
setuid(cmdp->uid);
execve(cmdp->path, argv, NULL);
node_perror("norm_extcmd: execve", errno);
exit(1);
}
/* parent */
waitpid(pid, NULL, 0);
return 0;
}
static int pipe_extcmd(struct cmd *cmdp, char **argv)
{
ax25io *iop;
int pipe_in[2], pipe_out[2];
int pid, c;
fd_set fdset;
if (pipe(pipe_in) == -1) {
node_perror("pipe_extcmd: pipe_in", errno);
return 0;
}
if (pipe(pipe_out) == -1) {
node_perror("pipe_extcmd: pipe_out", errno);
return 0;
}
signal(SIGCHLD, SIG_IGN);
pid = fork();
if (pid == -1) {
/* fork error */
node_perror("pipe_extcmd: fork", errno);
signal(SIGCHLD, SIG_DFL);
return 0;
}
if (pid == 0) {
/* child */
/*
* Redirect childs output to the pipes closing
* stdin/out/err as we go.
*/
dup2(pipe_in[0], STDIN_FILENO);
dup2(pipe_out[1], STDOUT_FILENO);
dup2(pipe_out[1], STDERR_FILENO);
/* Close the other ends */
close(pipe_in[1]);
close(pipe_out[0]);
setgroups(0, NULL);
setgid(cmdp->gid);
setuid(cmdp->uid);
execve(cmdp->path, argv, NULL);
perror("pipe_extcmd: execve");
exit(1);
}
/* parent */
close(pipe_in[0]);
close(pipe_out[1]);
if (fcntl(STDIN_FILENO, F_SETFL, O_NONBLOCK) == -1 ||
fcntl(pipe_out[0], F_SETFL, O_NONBLOCK) == -1) {
node_perror("pipe_extcmd: fcntl - pipe_out", errno);
goto end;
}
iop = axio_init(pipe_out[0], pipe_in[1], 1024, UNSPEC_EOL);
if (iop == NULL) {
node_perror("pipe_extcmd: Error initializing I/O", -1);
goto end;
}
while (1) {
FD_ZERO(&fdset);
FD_SET(STDIN_FILENO, &fdset);
FD_SET(pipe_out[0], &fdset);
if (select(32, &fdset, 0, 0, 0) == -1) {
node_perror("pipe_extcmd: select", errno);
break;
}
if (FD_ISSET(STDIN_FILENO, &fdset)) {
alarm(ConnTimeout);
while((c = axio_getc(NodeIo)) != -1)
axio_putc(c, iop);
if (errno != EAGAIN)
break;
}
if (FD_ISSET(pipe_out[0], &fdset)) {
alarm(ConnTimeout);
while((c = axio_getc(iop)) != -1)
axio_putc(c, NodeIo);
if (errno != EAGAIN) {
if (errno)
node_msg("%s", strerror(errno));
break;
}
}
axio_flush(NodeIo);
axio_flush(iop);
}
#ifdef HAVEMOTD
if (User.ul_type == AF_NETROM) {
axio_printf(NodeIo, "%s} ", NodeId);
if (check_perms(PERM_ANSI, 0L) != -1) {
// axio_printf(NodeIo,"\e[01;31mWelcome back.\e[0m");
axio_printf(NodeIo,"\e[01;31mEnd of command.\e[0m");
} else {
// axio_printf(NodeIo, "Welcome back.");
axio_printf(NodeIo, "End of command.");
}
} else if ((User.ul_type == AF_INET) || (User.ul_type == AF_INET6)) {
if (check_perms(PERM_ANSI, 0L) != -1) {
axio_printf(NodeIo, "\e[01;31m");
}
// axio_printf(NodeIo, "Returning you to the shell...");
axio_printf(NodeIo, "End of command.");
} else if (User.ul_type == AF_AX25) {
if (check_perms(PERM_ANSI, 0L) != -1) {
axio_printf(NodeIo,"\e[01;31m");
}
// axio_printf(NodeIo,"Welcome back to %s.", FlexId);
axio_printf(NodeIo,"End of command.");
} else if (User.ul_type == AF_ROSE) {
if (check_perms(PERM_ANSI, 0L) != -1) {
axio_printf(NodeIo,"\e[01;31m");
}
// axio_printf(NodeIo,"Back to %s", RoseId);
axio_printf(NodeIo,"End of command.");
}
#endif
axio_end(iop);
end:
signal(SIGCHLD, SIG_DFL);
kill(pid, SIGKILL);
close(pipe_in[1]);
close(pipe_out[0]);
if (fcntl(STDIN_FILENO, F_SETFL, 0) == -1)
node_perror("pipe_extcmd: fcntl - stdin", errno);
return 0;
}
int extcmd(struct cmd *cmdp, char **argv)
{
int ret;
User.state = STATE_EXTCMD;
User.dl_type = AF_UNSPEC;
strcpy(User.dl_name, cmdp->name);
strupr(User.dl_name);
update_user();
if (cmdp->flags & ECMD_PIPE)
ret = pipe_extcmd(cmdp, argv);
else
ret = norm_extcmd(cmdp, argv);
#ifdef HAVEMOTD
if (cmdp->flags & ECMD_RECONN) {
if (User.ul_type == AF_NETROM) {
// axio_printf(NodeIo, "%s} Welcome back.", NodeId);
axio_printf(NodeIo, "%s} End of command.", NodeId);
}
}
else if (User.ul_type == AF_AX25) {
/* axio_printf(NodeIo, "Welcome back to %s.", FlexId); */
}
if (User.ul_type == AF_NETROM) {
node_msg("");
}
#else
if (cmdp->flags)
node_logout("");
#endif
return ret;
}
|
