1 /*-
2 * Copyright (c) 2015 Nuxi, https://nuxi.nl/
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 */
25
26 #include <sys/cdefs.h>
27 __FBSDID("$FreeBSD$");
28
29 #include <sys/param.h>
30 #include <sys/capsicum.h>
31 #include <sys/filedesc.h>
32 #include <sys/imgact.h>
33 #include <sys/lock.h>
34 #include <sys/module.h>
35 #include <sys/mutex.h>
36 #include <sys/proc.h>
37 #include <sys/signalvar.h>
38 #include <sys/syscallsubr.h>
39 #include <sys/unistd.h>
40
41 #include <contrib/cloudabi/cloudabi_types_common.h>
42
43 #include <compat/cloudabi/cloudabi_proto.h>
44
45 int
cloudabi_sys_proc_exec(struct thread * td,struct cloudabi_sys_proc_exec_args * uap)46 cloudabi_sys_proc_exec(struct thread *td,
47 struct cloudabi_sys_proc_exec_args *uap)
48 {
49 struct image_args args;
50 struct vmspace *oldvmspace;
51 int error;
52
53 error = pre_execve(td, &oldvmspace);
54 if (error != 0)
55 return (error);
56 error = exec_copyin_data_fds(td, &args, uap->data, uap->data_len,
57 uap->fds, uap->fds_len);
58 if (error == 0) {
59 args.fd = uap->fd;
60 error = kern_execve(td, &args, NULL, oldvmspace);
61 }
62 post_execve(td, error, oldvmspace);
63 return (error);
64 }
65
66 int
cloudabi_sys_proc_exit(struct thread * td,struct cloudabi_sys_proc_exit_args * uap)67 cloudabi_sys_proc_exit(struct thread *td,
68 struct cloudabi_sys_proc_exit_args *uap)
69 {
70
71 exit1(td, uap->rval, 0);
72 /* NOTREACHED */
73 }
74
75 int
cloudabi_sys_proc_fork(struct thread * td,struct cloudabi_sys_proc_fork_args * uap)76 cloudabi_sys_proc_fork(struct thread *td,
77 struct cloudabi_sys_proc_fork_args *uap)
78 {
79 struct fork_req fr;
80 struct filecaps fcaps = {};
81 int error, fd;
82
83 cap_rights_init(&fcaps.fc_rights, CAP_FSTAT, CAP_EVENT);
84 bzero(&fr, sizeof(fr));
85 fr.fr_flags = RFFDG | RFPROC | RFPROCDESC;
86 fr.fr_pd_fd = &fd;
87 fr.fr_pd_fcaps = &fcaps;
88 error = fork1(td, &fr);
89 if (error != 0)
90 return (error);
91 /* Return the file descriptor to the parent process. */
92 td->td_retval[0] = fd;
93 return (0);
94 }
95
96 int
cloudabi_sys_proc_raise(struct thread * td,struct cloudabi_sys_proc_raise_args * uap)97 cloudabi_sys_proc_raise(struct thread *td,
98 struct cloudabi_sys_proc_raise_args *uap)
99 {
100 static const int signals[] = {
101 [CLOUDABI_SIGABRT] = SIGABRT,
102 [CLOUDABI_SIGALRM] = SIGALRM,
103 [CLOUDABI_SIGBUS] = SIGBUS,
104 [CLOUDABI_SIGCHLD] = SIGCHLD,
105 [CLOUDABI_SIGCONT] = SIGCONT,
106 [CLOUDABI_SIGFPE] = SIGFPE,
107 [CLOUDABI_SIGHUP] = SIGHUP,
108 [CLOUDABI_SIGILL] = SIGILL,
109 [CLOUDABI_SIGINT] = SIGINT,
110 [CLOUDABI_SIGKILL] = SIGKILL,
111 [CLOUDABI_SIGPIPE] = SIGPIPE,
112 [CLOUDABI_SIGQUIT] = SIGQUIT,
113 [CLOUDABI_SIGSEGV] = SIGSEGV,
114 [CLOUDABI_SIGSTOP] = SIGSTOP,
115 [CLOUDABI_SIGSYS] = SIGSYS,
116 [CLOUDABI_SIGTERM] = SIGTERM,
117 [CLOUDABI_SIGTRAP] = SIGTRAP,
118 [CLOUDABI_SIGTSTP] = SIGTSTP,
119 [CLOUDABI_SIGTTIN] = SIGTTIN,
120 [CLOUDABI_SIGTTOU] = SIGTTOU,
121 [CLOUDABI_SIGURG] = SIGURG,
122 [CLOUDABI_SIGUSR1] = SIGUSR1,
123 [CLOUDABI_SIGUSR2] = SIGUSR2,
124 [CLOUDABI_SIGVTALRM] = SIGVTALRM,
125 [CLOUDABI_SIGXCPU] = SIGXCPU,
126 [CLOUDABI_SIGXFSZ] = SIGXFSZ,
127 };
128 ksiginfo_t ksi;
129 struct proc *p;
130
131 if (uap->sig >= nitems(signals) || signals[uap->sig] == 0) {
132 /* Invalid signal, or the null signal. */
133 return (uap->sig == 0 ? 0 : EINVAL);
134 }
135
136 p = td->td_proc;
137 ksiginfo_init(&ksi);
138 ksi.ksi_signo = signals[uap->sig];
139 ksi.ksi_code = SI_USER;
140 ksi.ksi_pid = p->p_pid;
141 ksi.ksi_uid = td->td_ucred->cr_ruid;
142 PROC_LOCK(p);
143 pksignal(p, ksi.ksi_signo, &ksi);
144 PROC_UNLOCK(p);
145 return (0);
146 }
147
148 MODULE_VERSION(cloudabi, 1);
149