cloudabi_proc.c revision 316574 
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: stable/11/sys/compat/cloudabi/cloudabi_proc.c 316574 2017-04-06 15:10:36Z ed $");
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
45int
46cloudabi_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);
61	}
62	post_execve(td, error, oldvmspace);
63	return (error);
64}
65
66int
67cloudabi_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
75int
76cloudabi_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
96int
97cloudabi_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
148MODULE_VERSION(cloudabi, 1);
149