svr4_filio.c revision 109623
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 109623 2003-01-21 08:56:16Z alfred $ 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 pa.fds = uap->fds; 67 pa.nfds = uap->nfds; 68 pa.timeout = uap->timeout; 69 70 siz = uap->nfds * sizeof(struct pollfd); 71 pfd = (struct pollfd *)malloc(siz, M_TEMP, 0); 72 73 error = poll(td, (struct poll_args *)uap); 74 75 if ((cerr = copyin(uap->fds, pfd, siz)) != 0) { 76 error = cerr; 77 goto done; 78 } 79 80 for (idx = 0; idx < 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, 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 ra.fd = uap->fd; 109 ra.buf = uap->buf; 110 ra.nbyte = 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 = fp->f_data; 119 DPRINTF(("fd %d is a socket\n", uap->fd)); 120 if (so->so_state & SS_ASYNC) { 121 DPRINTF(("fd %d is an ASYNC socket!\n", uap->fd)); 122 } 123 DPRINTF(("Here are its flags: 0x%x\n", so->so_state)); 124#if defined(GROTTY_READ_HACK) 125 so_state = so->so_state; 126 so->so_state &= ~SS_NBIO; 127#endif 128 } 129 130 rv = read(td, &ra); 131 132 DPRINTF(("svr4_read(%d, 0x%0x, %d) = %d\n", 133 uap->fd, uap->buf, uap->nbyte, rv)); 134 if (rv == EAGAIN) { 135 DPRINTF(("sigmask = 0x%x\n", td->td_proc->p_sigmask)); 136 DPRINTF(("sigignore = 0x%x\n", td->td_proc->p_sigignore)); 137 DPRINTF(("sigcaught = 0x%x\n", td->td_proc->p_sigcatch)); 138 DPRINTF(("siglist = 0x%x\n", td->td_proc->p_siglist)); 139 } 140 141#if defined(GROTTY_READ_HACK) 142 if (so) { /* We've already checked to see if this is a socket */ 143 so->so_state = so_state; 144 } 145#endif 146 fdrop(fp, td); 147 148 return(rv); 149} 150#endif /* READ_TEST */ 151 152#if defined(BOGUS) 153int 154svr4_sys_write(td, uap) 155 struct thread *td; 156 struct svr4_sys_write_args *uap; 157{ 158 struct write_args wa; 159 struct file *fp; 160 int rv; 161 162 wa.fd = uap->fd; 163 wa.buf = uap->buf; 164 wa.nbyte = uap->nbyte; 165 166 rv = write(td, &wa); 167 168 DPRINTF(("svr4_write(%d, 0x%0x, %d) = %d\n", 169 uap->fd, uap->buf, uap->nbyte, rv)); 170 171 return(rv); 172} 173#endif /* BOGUS */ 174 175int 176svr4_fil_ioctl(fp, td, retval, fd, cmd, data) 177 struct file *fp; 178 struct thread *td; 179 register_t *retval; 180 int fd; 181 u_long cmd; 182 caddr_t data; 183{ 184 int error; 185 int num; 186 struct filedesc *fdp = td->td_proc->p_fd; 187 188 *retval = 0; 189 190 FILEDESC_LOCK(fdp); 191 switch (cmd) { 192 case SVR4_FIOCLEX: 193 fdp->fd_ofileflags[fd] |= UF_EXCLOSE; 194 FILEDESC_UNLOCK(fdp); 195 return 0; 196 197 case SVR4_FIONCLEX: 198 fdp->fd_ofileflags[fd] &= ~UF_EXCLOSE; 199 FILEDESC_UNLOCK(fdp); 200 return 0; 201 202 case SVR4_FIOGETOWN: 203 case SVR4_FIOSETOWN: 204 case SVR4_FIOASYNC: 205 case SVR4_FIONBIO: 206 case SVR4_FIONREAD: 207 FILEDESC_UNLOCK(fdp); 208 if ((error = copyin(data, &num, sizeof(num))) != 0) 209 return error; 210 211 switch (cmd) { 212 case SVR4_FIOGETOWN: cmd = FIOGETOWN; break; 213 case SVR4_FIOSETOWN: cmd = FIOSETOWN; break; 214 case SVR4_FIOASYNC: cmd = FIOASYNC; break; 215 case SVR4_FIONBIO: cmd = FIONBIO; break; 216 case SVR4_FIONREAD: cmd = FIONREAD; break; 217 } 218 219#ifdef SVR4_DEBUG 220 if (cmd == FIOASYNC) DPRINTF(("FIOASYNC\n")); 221#endif 222 error = fo_ioctl(fp, cmd, (caddr_t) &num, td->td_ucred, td); 223 224 if (error) 225 return error; 226 227 return copyout(&num, data, sizeof(num)); 228 229 default: 230 FILEDESC_UNLOCK(fdp); 231 DPRINTF(("Unknown svr4 filio %lx\n", cmd)); 232 return 0; /* ENOSYS really */ 233 } 234} 235