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      1 /*	$NetBSD: linux32_wait.c,v 1.13 2023/08/18 19:41:20 christos Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2006 Emmanuel Dreyfus, all rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. All advertising materials mentioning features or use of this software
     15  *    must display the following acknowledgement:
     16  *	This product includes software developed by Emmanuel Dreyfus
     17  * 4. The name of the author may not be used to endorse or promote
     18  *    products derived from this software without specific prior written
     19  *    permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE THE AUTHOR AND CONTRIBUTORS ``AS IS''
     22  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
     23  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     24  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
     25  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     31  * POSSIBILITY OF SUCH DAMAGE.
     32  */
     33 
     34 #include <sys/cdefs.h>
     35 
     36 __KERNEL_RCSID(0, "$NetBSD: linux32_wait.c,v 1.13 2023/08/18 19:41:20 christos Exp $");
     37 
     38 #include <sys/types.h>
     39 #include <sys/param.h>
     40 #include <sys/fstypes.h>
     41 #include <sys/signal.h>
     42 #include <sys/dirent.h>
     43 #include <sys/kernel.h>
     44 #include <sys/fcntl.h>
     45 #include <sys/select.h>
     46 #include <sys/proc.h>
     47 #include <sys/ucred.h>
     48 #include <sys/swap.h>
     49 #include <sys/wait.h>
     50 
     51 #include <machine/types.h>
     52 
     53 #include <sys/syscallargs.h>
     54 
     55 #include <compat/netbsd32/netbsd32.h>
     56 #include <compat/netbsd32/netbsd32_conv.h>
     57 #include <compat/netbsd32/netbsd32_syscallargs.h>
     58 
     59 #include <compat/linux/common/linux_types.h>
     60 #include <compat/linux/common/linux_signal.h>
     61 #include <compat/linux/common/linux_machdep.h>
     62 #include <compat/linux/common/linux_misc.h>
     63 #include <compat/linux/common/linux_oldolduname.h>
     64 #include <compat/linux/common/linux_ipc.h>
     65 #include <compat/linux/common/linux_sem.h>
     66 #include <compat/linux/linux_syscallargs.h>
     67 
     68 #include <compat/linux32/common/linux32_types.h>
     69 #include <compat/linux32/common/linux32_signal.h>
     70 #include <compat/linux32/common/linux32_machdep.h>
     71 #include <compat/linux32/common/linux32_sysctl.h>
     72 #include <compat/linux32/common/linux32_socketcall.h>
     73 #include <compat/linux32/linux32_syscallargs.h>
     74 
     75 int
     76 linux32_sys_waitpid(struct lwp *l, const struct linux32_sys_waitpid_args *uap, register_t *retval)
     77 {
     78 	/* {
     79 		syscallarg(int) pid;
     80 		syscallarg(netbsd32_intp) status;
     81 		syscallarg(int) options;
     82 	} */
     83 	struct linux32_sys_wait4_args ua;
     84 
     85 	SCARG(&ua, pid) = SCARG(uap, pid);
     86 	SCARG(&ua, status) = SCARG(uap, status);
     87 	SCARG(&ua, options) = SCARG(uap, options);
     88 	NETBSD32PTR32(SCARG(&ua, rusage), NULL);
     89 
     90 	return linux32_sys_wait4(l, &ua, retval);
     91 }
     92 
     93 int
     94 linux32_sys_wait4(struct lwp *l, const struct linux32_sys_wait4_args *uap, register_t *retval)
     95 {
     96 	/* {
     97 		syscallarg(int) pid;
     98 		syscallarg(netbsd32_intp) status;
     99 		syscallarg(int) options;
    100 		syscallarg(netbsd32_rusage50p_t) rusage;
    101 	} */
    102 	int error, status, linux_options, options, pid;
    103 	struct netbsd32_rusage50 ru32;
    104 	struct rusage ru;
    105 	proc_t *p;
    106 
    107 	linux_options = SCARG(uap, options);
    108 	if (linux_options & ~(LINUX_WAIT4_KNOWNFLAGS))
    109 		return EINVAL;
    110 
    111 	options = 0;
    112 	if (linux_options & LINUX_WNOHANG)
    113 		options |= WNOHANG;
    114 	if (linux_options & LINUX_WUNTRACED)
    115 		options |= WUNTRACED;
    116 	if (linux_options & LINUX_WALL)
    117 		options |= WALLSIG;
    118 	if (linux_options & LINUX_WCLONE)
    119 		options |= WALTSIG;
    120 
    121 	pid = SCARG(uap, pid);
    122 	error = do_sys_wait(&pid, &status, options,
    123 	    SCARG_P32(uap, rusage) != NULL ? &ru : NULL);
    124 	retval[0] = pid;
    125 	if (pid == 0)
    126 		return error;
    127 
    128 	p = curproc;
    129 	mutex_enter(p->p_lock);
    130 	sigdelset(&p->p_sigpend.sp_set, SIGCHLD);	/* XXXAD ksiginfo leak */
    131 	mutex_exit(p->p_lock);
    132 
    133 	if (SCARG_P32(uap, rusage) != NULL) {
    134 		netbsd32_from_rusage50(&ru, &ru32);
    135 		error = copyout(&ru32, SCARG_P32(uap, rusage), sizeof(ru32));
    136 	}
    137 
    138 	if (error == 0 && SCARG_P32(uap, status) != NULL) {
    139 		status = bsd_to_linux_wstat(status);
    140 		error = copyout(&status, SCARG_P32(uap, status), sizeof(status));
    141 	}
    142 
    143 	return error;
    144 }
    145