1 /* $NetBSD: kern_select_50.c,v 1.4 2023/07/28 18:19:00 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2008, 2009 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Christos Zoulas. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 #include <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: kern_select_50.c,v 1.4 2023/07/28 18:19:00 christos Exp $"); 33 34 #if defined(_KERNEL_OPT) 35 #include "opt_compat_netbsd.h" 36 #endif 37 38 #include <sys/param.h> 39 #include <sys/event.h> 40 #include <sys/poll.h> 41 #include <sys/select.h> 42 #include <sys/time.h> 43 #include <sys/syscall.h> 44 #include <sys/syscallvar.h> 45 #include <sys/syscallargs.h> 46 47 #include <compat/sys/event.h> 48 #include <compat/sys/time.h> 49 #include <compat/common/compat_mod.h> 50 51 static const struct syscall_package kern_select_50_syscalls[] = { 52 { SYS_compat_50_kevent, 0, (sy_call_t *)compat_50_sys_kevent }, 53 { SYS_compat_50_select, 0, (sy_call_t *)compat_50_sys_select }, 54 { SYS_compat_50_pselect, 0, (sy_call_t *)compat_50_sys_pselect }, 55 { SYS_compat_50_pollts, 0, (sy_call_t *)compat_50_sys_pollts }, 56 { 0, 0, NULL } 57 }; 58 59 static int 60 compat_50_kevent_fetch_timeout(const void *src, void *dest, size_t length) 61 { 62 struct timespec50 ts50; 63 int error; 64 65 KASSERT(length == sizeof(struct timespec)); 66 67 error = copyin(src, &ts50, sizeof(ts50)); 68 if (error) 69 return error; 70 timespec50_to_timespec(&ts50, (struct timespec *)dest); 71 return 0; 72 } 73 74 int 75 compat_50_sys_kevent(struct lwp *l, const struct compat_50_sys_kevent_args *uap, 76 register_t *retval) 77 { 78 /* { 79 syscallarg(int) fd; 80 syscallarg(struct kevent100 *) changelist; 81 syscallarg(size_t) nchanges; 82 syscallarg(struct kevent100 *) eventlist; 83 syscallarg(size_t) nevents; 84 syscallarg(struct timespec50) timeout; 85 } */ 86 static const struct kevent_ops compat_50_kevent_ops = { 87 .keo_private = NULL, 88 .keo_fetch_timeout = compat_50_kevent_fetch_timeout, 89 .keo_fetch_changes = compat_100___kevent50_fetch_changes, 90 .keo_put_events = compat_100___kevent50_put_events, 91 }; 92 93 return kevent1(retval, SCARG(uap, fd), 94 (const struct kevent *)(const void *)SCARG(uap, changelist), SCARG(uap, nchanges), 95 (struct kevent *)(void *)SCARG(uap, eventlist), SCARG(uap, nevents), 96 (const struct timespec *)(const void *)SCARG(uap, timeout), 97 &compat_50_kevent_ops); 98 } 99 100 int 101 compat_50_sys_select(struct lwp *l, 102 const struct compat_50_sys_select_args *uap, register_t *retval) 103 { 104 /* { 105 syscallarg(int) nd; 106 syscallarg(fd_set *) in; 107 syscallarg(fd_set *) ou; 108 syscallarg(fd_set *) ex; 109 syscallarg(struct timeval50 *) tv; 110 } */ 111 struct timespec ats, *ts = NULL; 112 struct timeval50 atv50; 113 int error; 114 115 if (SCARG(uap, tv)) { 116 error = copyin(SCARG(uap, tv), (void *)&atv50, sizeof(atv50)); 117 if (error) 118 return error; 119 120 if (atv50.tv_usec < 0 || atv50.tv_usec >= 1000000) 121 return EINVAL; 122 123 ats.tv_sec = atv50.tv_sec; 124 ats.tv_nsec = atv50.tv_usec * 1000; 125 ts = &ats; 126 } 127 128 return selcommon(retval, SCARG(uap, nd), SCARG(uap, in), 129 SCARG(uap, ou), SCARG(uap, ex), ts, NULL); 130 } 131 132 int 133 compat_50_sys_pselect(struct lwp *l, 134 const struct compat_50_sys_pselect_args *uap, register_t *retval) 135 { 136 /* { 137 syscallarg(int) nd; 138 syscallarg(fd_set *) in; 139 syscallarg(fd_set *) ou; 140 syscallarg(fd_set *) ex; 141 syscallarg(const struct timespec50 *) ts; 142 syscallarg(sigset_t *) mask; 143 } */ 144 struct timespec50 ats50; 145 struct timespec ats, *ts = NULL; 146 sigset_t amask, *mask = NULL; 147 int error; 148 149 if (SCARG(uap, ts)) { 150 error = copyin(SCARG(uap, ts), &ats50, sizeof(ats50)); 151 if (error) 152 return error; 153 timespec50_to_timespec(&ats50, &ats); 154 ts = &ats; 155 } 156 if (SCARG(uap, mask) != NULL) { 157 error = copyin(SCARG(uap, mask), &amask, sizeof(amask)); 158 if (error) 159 return error; 160 mask = &amask; 161 } 162 163 return selcommon(retval, SCARG(uap, nd), SCARG(uap, in), 164 SCARG(uap, ou), SCARG(uap, ex), ts, mask); 165 } 166 167 int 168 compat_50_sys_pollts(struct lwp *l, const struct compat_50_sys_pollts_args *uap, 169 register_t *retval) 170 { 171 /* { 172 syscallarg(struct pollfd *) fds; 173 syscallarg(u_int) nfds; 174 syscallarg(const struct timespec50 *) ts; 175 syscallarg(const sigset_t *) mask; 176 } */ 177 struct timespec ats, *ts = NULL; 178 struct timespec50 ats50; 179 sigset_t amask, *mask = NULL; 180 int error; 181 182 if (SCARG(uap, ts)) { 183 error = copyin(SCARG(uap, ts), &ats50, sizeof(ats50)); 184 if (error) 185 return error; 186 timespec50_to_timespec(&ats50, &ats); 187 ts = &ats; 188 } 189 if (SCARG(uap, mask)) { 190 error = copyin(SCARG(uap, mask), &amask, sizeof(amask)); 191 if (error) 192 return error; 193 mask = &amask; 194 } 195 196 return pollcommon(retval, SCARG(uap, fds), SCARG(uap, nfds), ts, mask); 197 } 198 199 int 200 kern_select_50_init(void) 201 { 202 203 return syscall_establish(NULL, kern_select_50_syscalls); 204 } 205 206 int 207 kern_select_50_fini(void) 208 { 209 210 return syscall_disestablish(NULL, kern_select_50_syscalls); 211 } 212
Indexes created Mon Sep 22 13:09:51 GMT 2025