svr4_filio.c revision 96972
1/* 2 * Copyright (c) 1998 Mark Newton 3 * Copyright (c) 1994 Christos Zoulas 4 * 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. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * $FreeBSD: head/sys/compat/svr4/svr4_filio.c 96972 2002-05-20 05:41:09Z tanimura $ 29 */ 30 31#include <sys/param.h> 32#include <sys/proc.h> 33#include <sys/systm.h> 34#include <sys/file.h> 35#include <sys/filio.h> 36#include <sys/lock.h> 37#include <sys/signal.h> 38#include <sys/filedesc.h> 39#include <sys/poll.h> 40#include <sys/malloc.h> 41#include <sys/mutex.h> 42 43#include <sys/sysproto.h> 44 45#include <compat/svr4/svr4.h> 46#include <compat/svr4/svr4_types.h> 47#include <compat/svr4/svr4_util.h> 48#include <compat/svr4/svr4_signal.h> 49#include <compat/svr4/svr4_proto.h> 50#include <compat/svr4/svr4_ioctl.h> 51#include <compat/svr4/svr4_filio.h> 52 53/*#define GROTTY_READ_HACK*/ 54 55int 56svr4_sys_poll(td, uap) 57 struct thread *td; 58 struct svr4_sys_poll_args *uap; 59{ 60 int error; 61 struct poll_args pa; 62 struct pollfd *pfd; 63 int idx = 0, cerr; 64 u_long siz; 65 66 SCARG(&pa, fds) = SCARG(uap, fds); 67 SCARG(&pa, nfds) = SCARG(uap, nfds); 68 SCARG(&pa, timeout) = SCARG(uap, timeout); 69 70 siz = SCARG(uap, nfds) * sizeof(struct pollfd); 71 pfd = (struct pollfd *)malloc(siz, M_TEMP, M_WAITOK); 72 73 error = poll(td, (struct poll_args *)uap); 74 75 if ((cerr = copyin(SCARG(uap, fds), pfd, siz)) != 0) { 76 error = cerr; 77 goto done; 78 } 79 80 for (idx = 0; idx < SCARG(uap, nfds); idx++) { 81 /* POLLWRNORM already equals POLLOUT, so we don't worry about that */ 82 if (pfd[idx].revents & (POLLOUT | POLLWRNORM | POLLWRBAND)) 83 pfd[idx].revents |= (POLLOUT | POLLWRNORM | POLLWRBAND); 84 } 85 if ((cerr = copyout(pfd, SCARG(uap, fds), siz)) != 0) { 86 error = cerr; 87 goto done; /* yeah, I know it's the next line, but this way I won't 88 forget to update it if I add more code */ 89 } 90done: 91 free(pfd, M_TEMP); 92 return error; 93} 94 95#if defined(READ_TEST) 96int 97svr4_sys_read(td, uap) 98 struct thread *td; 99 struct svr4_sys_read_args *uap; 100{ 101 struct read_args ra; 102 struct file *fp; 103 struct socket *so = NULL; 104 int so_state; 105 sigset_t sigmask; 106 int rv; 107 108 SCARG(&ra, fd) = SCARG(uap, fd); 109 SCARG(&ra, buf) = SCARG(uap, buf); 110 SCARG(&ra, nbyte) = SCARG(uap, nbyte); 111 112 if (fget(td, uap->fd, &fp) != 0) { 113 DPRINTF(("Something fishy with the user-supplied file descriptor...\n")); 114 return EBADF; 115 } 116 117 if (fp->f_type == DTYPE_SOCKET) { 118 so = (struct socket *)fp->f_data; 119 SOCK_LOCK(so); 120 so_state = so->so_state; 121#if defined(GROTTY_READ_HACK) 122 so->so_state &= ~SS_NBIO; 123#endif 124 SOCK_UNLOCK(so); 125 DPRINTF(("fd %d is a socket\n", SCARG(uap, fd))); 126 if (so_state & SS_ASYNC) { 127 DPRINTF(("fd %d is an ASYNC socket!\n", SCARG(uap, fd))); 128 } 129 DPRINTF(("Here are its flags: 0x%x\n", so_state)); 130 } 131 132 rv = read(td, &ra); 133 134 DPRINTF(("svr4_read(%d, 0x%0x, %d) = %d\n", 135 SCARG(uap, fd), SCARG(uap, buf), SCARG(uap, nbyte), rv)); 136 if (rv == EAGAIN) { 137 DPRINTF(("sigmask = 0x%x\n", td->td_proc->p_sigmask)); 138 DPRINTF(("sigignore = 0x%x\n", td->td_proc->p_sigignore)); 139 DPRINTF(("sigcaught = 0x%x\n", td->td_proc->p_sigcatch)); 140 DPRINTF(("siglist = 0x%x\n", td->td_proc->p_siglist)); 141 } 142 143#if defined(GROTTY_READ_HACK) 144 if (so) { /* We've already checked to see if this is a socket */ 145 SOCK_LOCK(so); 146 so->so_state = so_state; 147 SOCK_UNLOCK(so); 148 } 149#endif 150 fdrop(fp, td); 151 152 return(rv); 153} 154#endif /* READ_TEST */ 155 156#if defined(BOGUS) 157int 158svr4_sys_write(td, uap) 159 struct thread *td; 160 struct svr4_sys_write_args *uap; 161{ 162 struct write_args wa; 163 struct file *fp; 164 int rv; 165 166 SCARG(&wa, fd) = SCARG(uap, fd); 167 SCARG(&wa, buf) = SCARG(uap, buf); 168 SCARG(&wa, nbyte) = SCARG(uap, nbyte); 169 170 rv = write(td, &wa); 171 172 DPRINTF(("svr4_write(%d, 0x%0x, %d) = %d\n", 173 SCARG(uap, fd), SCARG(uap, buf), SCARG(uap, nbyte), rv)); 174 175 return(rv); 176} 177#endif /* BOGUS */ 178 179int 180svr4_fil_ioctl(fp, td, retval, fd, cmd, data) 181 struct file *fp; 182 struct thread *td; 183 register_t *retval; 184 int fd; 185 u_long cmd; 186 caddr_t data; 187{ 188 int error; 189 int num; 190 struct filedesc *fdp = td->td_proc->p_fd; 191 192 *retval = 0; 193 194 FILEDESC_LOCK(fdp); 195 switch (cmd) { 196 case SVR4_FIOCLEX: 197 fdp->fd_ofileflags[fd] |= UF_EXCLOSE; 198 FILEDESC_UNLOCK(fdp); 199 return 0; 200 201 case SVR4_FIONCLEX: 202 fdp->fd_ofileflags[fd] &= ~UF_EXCLOSE; 203 FILEDESC_UNLOCK(fdp); 204 return 0; 205 206 case SVR4_FIOGETOWN: 207 case SVR4_FIOSETOWN: 208 case SVR4_FIOASYNC: 209 case SVR4_FIONBIO: 210 case SVR4_FIONREAD: 211 FILEDESC_UNLOCK(fdp); 212 if ((error = copyin(data, &num, sizeof(num))) != 0) 213 return error; 214 215 switch (cmd) { 216 case SVR4_FIOGETOWN: cmd = FIOGETOWN; break; 217 case SVR4_FIOSETOWN: cmd = FIOSETOWN; break; 218 case SVR4_FIOASYNC: cmd = FIOASYNC; break; 219 case SVR4_FIONBIO: cmd = FIONBIO; break; 220 case SVR4_FIONREAD: cmd = FIONREAD; break; 221 } 222 223#ifdef SVR4_DEBUG 224 if (cmd == FIOASYNC) DPRINTF(("FIOASYNC\n")); 225#endif 226 error = fo_ioctl(fp, cmd, (caddr_t) &num, td); 227 228 if (error) 229 return error; 230 231 return copyout(&num, data, sizeof(num)); 232 233 default: 234 FILEDESC_UNLOCK(fdp); 235 DPRINTF(("Unknown svr4 filio %lx\n", cmd)); 236 return 0; /* ENOSYS really */ 237 } 238} 239