svr4_filio.c revision 125454
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 29#include <sys/cdefs.h> 30__FBSDID("$FreeBSD: head/sys/compat/svr4/svr4_filio.c 125454 2004-02-04 21:52:57Z jhb $"); 31 32#include <sys/param.h> 33#include <sys/proc.h> 34#include <sys/systm.h> 35#include <sys/file.h> 36#include <sys/filio.h> 37#include <sys/lock.h> 38#include <sys/signal.h> 39#include <sys/filedesc.h> 40#include <sys/poll.h> 41#include <sys/malloc.h> 42#include <sys/mutex.h> 43#include <sys/resource.h> 44#include <sys/resourcevar.h> 45 46#include <sys/sysproto.h> 47 48#include <compat/svr4/svr4.h> 49#include <compat/svr4/svr4_types.h> 50#include <compat/svr4/svr4_util.h> 51#include <compat/svr4/svr4_signal.h> 52#include <compat/svr4/svr4_proto.h> 53#include <compat/svr4/svr4_ioctl.h> 54#include <compat/svr4/svr4_filio.h> 55 56/*#define GROTTY_READ_HACK*/ 57 58int 59svr4_sys_poll(td, uap) 60 struct thread *td; 61 struct svr4_sys_poll_args *uap; 62{ 63 int error; 64 struct poll_args pa; 65 struct pollfd *pfd; 66 int idx = 0, cerr; 67 u_long siz; 68 69 PROC_LOCK(td->td_proc); 70 if (uap->nfds > lim_cur(td->td_proc, RLIMIT_NOFILE) && 71 uap->nfds > FD_SETSIZE) { 72 PROC_UNLOCK(td->td_proc); 73 return (EINVAL); 74 } 75 PROC_UNLOCK(td->td_proc); 76 77 pa.fds = uap->fds; 78 pa.nfds = uap->nfds; 79 pa.timeout = uap->timeout; 80 81 siz = uap->nfds * sizeof(struct pollfd); 82 pfd = (struct pollfd *)malloc(siz, M_TEMP, M_WAITOK); 83 84 error = poll(td, (struct poll_args *)uap); 85 86 if ((cerr = copyin(uap->fds, pfd, siz)) != 0) { 87 error = cerr; 88 goto done; 89 } 90 91 for (idx = 0; idx < uap->nfds; idx++) { 92 /* POLLWRNORM already equals POLLOUT, so we don't worry about that */ 93 if (pfd[idx].revents & (POLLOUT | POLLWRNORM | POLLWRBAND)) 94 pfd[idx].revents |= (POLLOUT | POLLWRNORM | POLLWRBAND); 95 } 96 if ((cerr = copyout(pfd, uap->fds, siz)) != 0) { 97 error = cerr; 98 goto done; /* yeah, I know it's the next line, but this way I won't 99 forget to update it if I add more code */ 100 } 101done: 102 free(pfd, M_TEMP); 103 return error; 104} 105 106#if defined(READ_TEST) 107int 108svr4_sys_read(td, uap) 109 struct thread *td; 110 struct svr4_sys_read_args *uap; 111{ 112 struct read_args ra; 113 struct file *fp; 114 struct socket *so = NULL; 115 int so_state; 116 sigset_t sigmask; 117 int rv; 118 119 ra.fd = uap->fd; 120 ra.buf = uap->buf; 121 ra.nbyte = uap->nbyte; 122 123 if (fget(td, uap->fd, &fp) != 0) { 124 DPRINTF(("Something fishy with the user-supplied file descriptor...\n")); 125 return EBADF; 126 } 127 128 if (fp->f_type == DTYPE_SOCKET) { 129 so = fp->f_data; 130 DPRINTF(("fd %d is a socket\n", uap->fd)); 131 if (so->so_state & SS_ASYNC) { 132 DPRINTF(("fd %d is an ASYNC socket!\n", uap->fd)); 133 } 134 DPRINTF(("Here are its flags: 0x%x\n", so->so_state)); 135#if defined(GROTTY_READ_HACK) 136 so_state = so->so_state; 137 so->so_state &= ~SS_NBIO; 138#endif 139 } 140 141 rv = read(td, &ra); 142 143 DPRINTF(("svr4_read(%d, 0x%0x, %d) = %d\n", 144 uap->fd, uap->buf, uap->nbyte, rv)); 145 if (rv == EAGAIN) { 146#ifdef DEBUG_SVR4 147 struct sigacts *ps; 148 149 PROC_LOCK(td->td_proc); 150 ps = td->td_proc->p_sigacts; 151 mtx_lock(&ps->ps_mtx); 152#endif 153 DPRINTF(("sigmask = 0x%x\n", td->td_sigmask)); 154 DPRINTF(("sigignore = 0x%x\n", ps->ps_sigignore)); 155 DPRINTF(("sigcaught = 0x%x\n", ps->ps_sigcatch)); 156 DPRINTF(("siglist = 0x%x\n", td->td_siglist)); 157#ifdef DEBUG_SVR4 158 mtx_unlock(&ps->ps_mtx); 159 PROC_UNLOCK(td->td_proc); 160#endif 161 } 162 163#if defined(GROTTY_READ_HACK) 164 if (so) { /* We've already checked to see if this is a socket */ 165 so->so_state = so_state; 166 } 167#endif 168 fdrop(fp, td); 169 170 return(rv); 171} 172#endif /* READ_TEST */ 173 174#if defined(BOGUS) 175int 176svr4_sys_write(td, uap) 177 struct thread *td; 178 struct svr4_sys_write_args *uap; 179{ 180 struct write_args wa; 181 struct file *fp; 182 int rv; 183 184 wa.fd = uap->fd; 185 wa.buf = uap->buf; 186 wa.nbyte = uap->nbyte; 187 188 rv = write(td, &wa); 189 190 DPRINTF(("svr4_write(%d, 0x%0x, %d) = %d\n", 191 uap->fd, uap->buf, uap->nbyte, rv)); 192 193 return(rv); 194} 195#endif /* BOGUS */ 196 197int 198svr4_fil_ioctl(fp, td, retval, fd, cmd, data) 199 struct file *fp; 200 struct thread *td; 201 register_t *retval; 202 int fd; 203 u_long cmd; 204 caddr_t data; 205{ 206 int error; 207 int num; 208 struct filedesc *fdp = td->td_proc->p_fd; 209 210 *retval = 0; 211 212 FILEDESC_LOCK(fdp); 213 switch (cmd) { 214 case SVR4_FIOCLEX: 215 fdp->fd_ofileflags[fd] |= UF_EXCLOSE; 216 FILEDESC_UNLOCK(fdp); 217 return 0; 218 219 case SVR4_FIONCLEX: 220 fdp->fd_ofileflags[fd] &= ~UF_EXCLOSE; 221 FILEDESC_UNLOCK(fdp); 222 return 0; 223 224 case SVR4_FIOGETOWN: 225 case SVR4_FIOSETOWN: 226 case SVR4_FIOASYNC: 227 case SVR4_FIONBIO: 228 case SVR4_FIONREAD: 229 FILEDESC_UNLOCK(fdp); 230 if ((error = copyin(data, &num, sizeof(num))) != 0) 231 return error; 232 233 switch (cmd) { 234 case SVR4_FIOGETOWN: cmd = FIOGETOWN; break; 235 case SVR4_FIOSETOWN: cmd = FIOSETOWN; break; 236 case SVR4_FIOASYNC: cmd = FIOASYNC; break; 237 case SVR4_FIONBIO: cmd = FIONBIO; break; 238 case SVR4_FIONREAD: cmd = FIONREAD; break; 239 } 240 241#ifdef SVR4_DEBUG 242 if (cmd == FIOASYNC) DPRINTF(("FIOASYNC\n")); 243#endif 244 error = fo_ioctl(fp, cmd, (caddr_t) &num, td->td_ucred, td); 245 246 if (error) 247 return error; 248 249 return copyout(&num, data, sizeof(num)); 250 251 default: 252 FILEDESC_UNLOCK(fdp); 253 DPRINTF(("Unknown svr4 filio %lx\n", cmd)); 254 return 0; /* ENOSYS really */ 255 } 256} 257