1/*-
2 * Copyright (c) 1999 Brian Somers <brian@Awfulhak.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
| 1/*-
2 * Copyright (c) 1999 Brian Somers <brian@Awfulhak.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
|
26 * $Id: exec.c,v 1.1 1999/05/08 11:06:30 brian Exp $
| 26 * $Id: exec.c,v 1.2 1999/05/12 09:48:49 brian Exp $
|
27 */
28
29#include <sys/param.h>
30#include <sys/socket.h>
31#include <netinet/in.h>
32#include <arpa/inet.h>
33#include <netdb.h>
34#include <netinet/in_systm.h>
35#include <netinet/ip.h>
36#include <sys/un.h>
37
38#include <errno.h>
39#include <fcntl.h>
40#include <stdio.h>
41#include <stdlib.h>
42#include <string.h>
43#include <sys/wait.h>
44#include <termios.h>
45#include <unistd.h>
46
47#include "layer.h"
48#include "defs.h"
49#include "mbuf.h"
50#include "log.h"
51#include "sync.h"
52#include "timer.h"
53#include "lqr.h"
54#include "hdlc.h"
55#include "throughput.h"
56#include "fsm.h"
57#include "lcp.h"
58#include "ccp.h"
59#include "link.h"
60#include "async.h"
61#include "slcompress.h"
62#include "iplist.h"
63#include "ipcp.h"
64#include "filter.h"
65#include "descriptor.h"
66#include "physical.h"
67#include "mp.h"
68#ifndef NORADIUS
69#include "radius.h"
70#endif
71#include "chat.h"
72#include "command.h"
73#include "bundle.h"
74#include "prompt.h"
75#include "auth.h"
76#include "chap.h"
77#include "cbcp.h"
78#include "datalink.h"
79#include "exec.h"
80
81static struct device execdevice = {
82 EXEC_DEVICE,
83 "exec",
84 NULL,
85 NULL,
86 NULL,
87 NULL,
88 NULL,
89 NULL,
90 NULL,
91 NULL,
92 NULL,
93 NULL
94};
95
96struct device *
97exec_iov2device(int type, struct physical *p, struct iovec *iov,
98 int *niov, int maxiov)
99{
| 27 */
28
29#include <sys/param.h>
30#include <sys/socket.h>
31#include <netinet/in.h>
32#include <arpa/inet.h>
33#include <netdb.h>
34#include <netinet/in_systm.h>
35#include <netinet/ip.h>
36#include <sys/un.h>
37
38#include <errno.h>
39#include <fcntl.h>
40#include <stdio.h>
41#include <stdlib.h>
42#include <string.h>
43#include <sys/wait.h>
44#include <termios.h>
45#include <unistd.h>
46
47#include "layer.h"
48#include "defs.h"
49#include "mbuf.h"
50#include "log.h"
51#include "sync.h"
52#include "timer.h"
53#include "lqr.h"
54#include "hdlc.h"
55#include "throughput.h"
56#include "fsm.h"
57#include "lcp.h"
58#include "ccp.h"
59#include "link.h"
60#include "async.h"
61#include "slcompress.h"
62#include "iplist.h"
63#include "ipcp.h"
64#include "filter.h"
65#include "descriptor.h"
66#include "physical.h"
67#include "mp.h"
68#ifndef NORADIUS
69#include "radius.h"
70#endif
71#include "chat.h"
72#include "command.h"
73#include "bundle.h"
74#include "prompt.h"
75#include "auth.h"
76#include "chap.h"
77#include "cbcp.h"
78#include "datalink.h"
79#include "exec.h"
80
81static struct device execdevice = {
82 EXEC_DEVICE,
83 "exec",
84 NULL,
85 NULL,
86 NULL,
87 NULL,
88 NULL,
89 NULL,
90 NULL,
91 NULL,
92 NULL,
93 NULL
94};
95
96struct device *
97exec_iov2device(int type, struct physical *p, struct iovec *iov,
98 int *niov, int maxiov)
99{
|
100 if (type == EXEC_DEVICE)
| 100 if (type == EXEC_DEVICE) {
101 physical_SetupStack(p, execdevice.name, PHYSICAL_FORCE_ASYNC);
|
101 return &execdevice;
| 102 return &execdevice;
|
| 103 }
|
102
103 return NULL;
104}
105
106struct device *
107exec_Create(struct physical *p)
108{
109 if (p->fd < 0 && *p->name.full == '!') {
110 int fids[2];
111
112 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, fids) < 0)
113 log_Printf(LogPHASE, "Unable to create pipe for line exec: %s\n",
114 strerror(errno));
115 else {
116 int stat, argc;
117 pid_t pid;
118 char *argv[MAXARGS];
119
120 stat = fcntl(fids[0], F_GETFL, 0);
121 if (stat > 0) {
122 stat |= O_NONBLOCK;
123 fcntl(fids[0], F_SETFL, stat);
124 }
125 switch ((pid = fork())) {
126 case -1:
127 log_Printf(LogPHASE, "Unable to create pipe for line exec: %s\n",
128 strerror(errno));
129 break;
130
131 case 0:
132 close(fids[0]);
133 timer_TermService();
134 setuid(geteuid());
135
136 switch (fork()) {
137 case 0:
138 break;
139
140 case -1:
141 log_Printf(LogPHASE, "Unable to fork to drop parent: %s\n",
142 strerror(errno));
143 default:
144 _exit(127);
145 }
146
147 fids[1] = fcntl(fids[1], F_DUPFD, 3);
148 dup2(fids[1], STDIN_FILENO);
149 dup2(fids[1], STDOUT_FILENO);
150 dup2(fids[1], STDERR_FILENO);
151
152 argc = MakeArgs(p->name.base, argv, VECSIZE(argv));
153 command_Expand(argv, argc, (char const *const *)argv,
154 p->dl->bundle, 0);
155 execvp(*argv, argv);
156 fprintf(stderr, "execvp failed: %s: %s\r\n", *argv, strerror(errno));
157 _exit(127);
158 break;
159
160 default:
161 close(fids[1]);
162 p->fd = fids[0];
163 waitpid(pid, &stat, 0);
164 log_Printf(LogDEBUG, "Using descriptor %d for child\n", p->fd);
| 104
105 return NULL;
106}
107
108struct device *
109exec_Create(struct physical *p)
110{
111 if (p->fd < 0 && *p->name.full == '!') {
112 int fids[2];
113
114 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, fids) < 0)
115 log_Printf(LogPHASE, "Unable to create pipe for line exec: %s\n",
116 strerror(errno));
117 else {
118 int stat, argc;
119 pid_t pid;
120 char *argv[MAXARGS];
121
122 stat = fcntl(fids[0], F_GETFL, 0);
123 if (stat > 0) {
124 stat |= O_NONBLOCK;
125 fcntl(fids[0], F_SETFL, stat);
126 }
127 switch ((pid = fork())) {
128 case -1:
129 log_Printf(LogPHASE, "Unable to create pipe for line exec: %s\n",
130 strerror(errno));
131 break;
132
133 case 0:
134 close(fids[0]);
135 timer_TermService();
136 setuid(geteuid());
137
138 switch (fork()) {
139 case 0:
140 break;
141
142 case -1:
143 log_Printf(LogPHASE, "Unable to fork to drop parent: %s\n",
144 strerror(errno));
145 default:
146 _exit(127);
147 }
148
149 fids[1] = fcntl(fids[1], F_DUPFD, 3);
150 dup2(fids[1], STDIN_FILENO);
151 dup2(fids[1], STDOUT_FILENO);
152 dup2(fids[1], STDERR_FILENO);
153
154 argc = MakeArgs(p->name.base, argv, VECSIZE(argv));
155 command_Expand(argv, argc, (char const *const *)argv,
156 p->dl->bundle, 0);
157 execvp(*argv, argv);
158 fprintf(stderr, "execvp failed: %s: %s\r\n", *argv, strerror(errno));
159 _exit(127);
160 break;
161
162 default:
163 close(fids[1]);
164 p->fd = fids[0];
165 waitpid(pid, &stat, 0);
166 log_Printf(LogDEBUG, "Using descriptor %d for child\n", p->fd);
|
165 physical_SetupStack(p, PHYSICAL_FORCE_ASYNC);
| 167 physical_SetupStack(p, execdevice.name, PHYSICAL_FORCE_ASYNC);
|
166 return &execdevice;
167 }
168 }
169 }
170
171 return NULL;
172}
| 168 return &execdevice;
169 }
170 }
171 }
172
173 return NULL;
174}
|