cloudabi_proc.c

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    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: releng/11.2/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 
   45 int
   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);
   61         }
   62         post_execve(td, error, oldvmspace);
   63         return (error);
   64 }
   65 
   66 int
   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
   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
   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);

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FreeBSD/Linux Kernel Cross Reference sys/compat/cloudabi/cloudabi_proc.c

FreeBSD/Linux Kernel Cross Reference
sys/compat/cloudabi/cloudabi_proc.c