2 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL
11 #include <sys/ioctl.h>
12 #include <sys/mount.h>
13 #include <sys/socket.h>
18 static void copy_stat(struct uml_stat *dst, const struct stat64 *src)
20 *dst = ((struct uml_stat) {
21 .ust_dev = src->st_dev, /* device */
22 .ust_ino = src->st_ino, /* inode */
23 .ust_mode = src->st_mode, /* protection */
24 .ust_nlink = src->st_nlink, /* number of hard links */
25 .ust_uid = src->st_uid, /* user ID of owner */
26 .ust_gid = src->st_gid, /* group ID of owner */
27 .ust_size = src->st_size, /* total size, in bytes */
28 .ust_blksize = src->st_blksize, /* blocksize for filesys I/O */
29 .ust_blocks = src->st_blocks, /* number of blocks allocated */
30 .ust_atime = src->st_atime, /* time of last access */
31 .ust_mtime = src->st_mtime, /* time of last modification */
32 .ust_ctime = src->st_ctime, /* time of last change */
36 int os_stat_fd(const int fd, struct uml_stat *ubuf)
41 CATCH_EINTR(err = fstat64(fd, &sbuf));
46 copy_stat(ubuf, &sbuf);
50 int os_stat_file(const char *file_name, struct uml_stat *ubuf)
55 CATCH_EINTR(err = stat64(file_name, &sbuf));
60 copy_stat(ubuf, &sbuf);
64 int os_access(const char *file, int mode)
68 amode = (mode & OS_ACC_R_OK ? R_OK : 0) |
69 (mode & OS_ACC_W_OK ? W_OK : 0) |
70 (mode & OS_ACC_X_OK ? X_OK : 0) |
71 (mode & OS_ACC_F_OK ? F_OK : 0);
73 err = access(file, amode);
80 /* FIXME? required only by hostaudio (because it passes ioctls verbatim) */
81 int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg)
85 err = ioctl(fd, cmd, arg);
92 /* FIXME: ensure namebuf in os_get_if_name is big enough */
93 int os_get_ifname(int fd, char* namebuf)
95 if (ioctl(fd, SIOCGIFNAME, namebuf) < 0)
101 int os_set_slip(int fd)
106 if (ioctl(fd, TIOCSETD, &disc) < 0)
110 if (ioctl(fd, SIOCSIFENCAP, &sencap) < 0)
116 int os_mode_fd(int fd, int mode)
120 CATCH_EINTR(err = fchmod(fd, mode));
127 int os_file_type(char *file)
132 err = os_stat_file(file, &buf);
136 if (S_ISDIR(buf.ust_mode))
138 else if (S_ISLNK(buf.ust_mode))
139 return OS_TYPE_SYMLINK;
140 else if (S_ISCHR(buf.ust_mode))
141 return OS_TYPE_CHARDEV;
142 else if (S_ISBLK(buf.ust_mode))
143 return OS_TYPE_BLOCKDEV;
144 else if (S_ISFIFO(buf.ust_mode))
146 else if (S_ISSOCK(buf.ust_mode))
148 else return OS_TYPE_FILE;
151 int os_file_mode(const char *file, struct openflags *mode_out)
155 *mode_out = OPENFLAGS();
157 err = access(file, W_OK);
158 if (err && (errno != EACCES))
161 *mode_out = of_write(*mode_out);
163 err = access(file, R_OK);
164 if (err && (errno != EACCES))
167 *mode_out = of_read(*mode_out);
172 int os_open_file(const char *file, struct openflags flags, int mode)
176 if (flags.r && flags.w)
195 fd = open64(file, f, mode);
199 if (flags.cl && fcntl(fd, F_SETFD, 1)) {
208 int os_connect_socket(const char *name)
210 struct sockaddr_un sock;
213 sock.sun_family = AF_UNIX;
214 snprintf(sock.sun_path, sizeof(sock.sun_path), "%s", name);
216 fd = socket(AF_UNIX, SOCK_STREAM, 0);
222 err = connect(fd, (struct sockaddr *) &sock, sizeof(sock));
236 void os_close_file(int fd)
241 int os_seek_file(int fd, unsigned long long offset)
243 unsigned long long actual;
245 actual = lseek64(fd, offset, SEEK_SET);
246 if (actual != offset)
251 int os_read_file(int fd, void *buf, int len)
253 int n = read(fd, buf, len);
260 int os_write_file(int fd, const void *buf, int len)
262 int n = write(fd, (void *) buf, len);
269 int os_file_size(const char *file, unsigned long long *size_out)
274 err = os_stat_file(file, &buf);
276 printk(UM_KERN_ERR "Couldn't stat \"%s\" : err = %d\n", file,
281 if (S_ISBLK(buf.ust_mode)) {
285 fd = open(file, O_RDONLY, 0);
288 printk(UM_KERN_ERR "Couldn't open \"%s\", "
289 "errno = %d\n", file, errno);
292 if (ioctl(fd, BLKGETSIZE, &blocks) < 0) {
294 printk(UM_KERN_ERR "Couldn't get the block size of "
295 "\"%s\", errno = %d\n", file, errno);
299 *size_out = ((long long) blocks) * 512;
302 else *size_out = buf.ust_size;
307 int os_file_modtime(const char *file, unsigned long *modtime)
312 err = os_stat_file(file, &buf);
314 printk(UM_KERN_ERR "Couldn't stat \"%s\" : err = %d\n", file,
319 *modtime = buf.ust_mtime;
323 int os_set_exec_close(int fd)
327 CATCH_EINTR(err = fcntl(fd, F_SETFD, FD_CLOEXEC));
334 int os_pipe(int *fds, int stream, int close_on_exec)
336 int err, type = stream ? SOCK_STREAM : SOCK_DGRAM;
338 err = socketpair(AF_UNIX, type, 0, fds);
345 err = os_set_exec_close(fds[0]);
349 err = os_set_exec_close(fds[1]);
356 printk(UM_KERN_ERR "os_pipe : Setting FD_CLOEXEC failed, err = %d\n",
363 int os_set_fd_async(int fd)
367 flags = fcntl(fd, F_GETFL);
371 flags |= O_ASYNC | O_NONBLOCK;
372 if (fcntl(fd, F_SETFL, flags) < 0) {
374 printk(UM_KERN_ERR "os_set_fd_async : failed to set O_ASYNC "
375 "and O_NONBLOCK on fd # %d, errno = %d\n", fd, errno);
379 if ((fcntl(fd, F_SETSIG, SIGIO) < 0) ||
380 (fcntl(fd, F_SETOWN, os_getpid()) < 0)) {
382 printk(UM_KERN_ERR "os_set_fd_async : Failed to fcntl F_SETOWN "
383 "(or F_SETSIG) fd %d, errno = %d\n", fd, errno);
390 int os_clear_fd_async(int fd)
394 flags = fcntl(fd, F_GETFL);
398 flags &= ~(O_ASYNC | O_NONBLOCK);
399 if (fcntl(fd, F_SETFL, flags) < 0)
404 int os_set_fd_block(int fd, int blocking)
408 flags = fcntl(fd, F_GETFL);
413 flags &= ~O_NONBLOCK;
417 if (fcntl(fd, F_SETFL, flags) < 0)
423 int os_accept_connection(int fd)
427 new = accept(fd, NULL, 0);
445 int os_shutdown_socket(int fd, int r, int w)
458 err = shutdown(fd, what);
464 int os_rcv_fd(int fd, int *helper_pid_out)
467 char buf[CMSG_SPACE(sizeof(new))];
469 struct cmsghdr *cmsg;
474 iov = ((struct iovec) { .iov_base = helper_pid_out,
475 .iov_len = sizeof(*helper_pid_out) });
478 msg.msg_control = buf;
479 msg.msg_controllen = sizeof(buf);
482 n = recvmsg(fd, &msg, 0);
485 else if (n != iov.iov_len)
486 *helper_pid_out = -1;
488 cmsg = CMSG_FIRSTHDR(&msg);
490 printk(UM_KERN_ERR "rcv_fd didn't receive anything, "
491 "error = %d\n", errno);
494 if ((cmsg->cmsg_level != SOL_SOCKET) ||
495 (cmsg->cmsg_type != SCM_RIGHTS)) {
496 printk(UM_KERN_ERR "rcv_fd didn't receive a descriptor\n");
500 new = ((int *) CMSG_DATA(cmsg))[0];
504 int os_create_unix_socket(const char *file, int len, int close_on_exec)
506 struct sockaddr_un addr;
509 sock = socket(PF_UNIX, SOCK_DGRAM, 0);
514 err = os_set_exec_close(sock);
516 printk(UM_KERN_ERR "create_unix_socket : "
517 "close_on_exec failed, err = %d", -err);
520 addr.sun_family = AF_UNIX;
522 snprintf(addr.sun_path, len, "%s", file);
524 err = bind(sock, (struct sockaddr *) &addr, sizeof(addr));
531 void os_flush_stdout(void)
536 int os_lock_file(int fd, int excl)
538 int type = excl ? F_WRLCK : F_RDLCK;
539 struct flock lock = ((struct flock) { .l_type = type,
540 .l_whence = SEEK_SET,
545 err = fcntl(fd, F_SETLK, &lock);
550 err = fcntl(fd, F_GETLK, &lock);
556 printk(UM_KERN_ERR "F_SETLK failed, file already locked by pid %d\n",
563 unsigned os_major(unsigned long long dev)
568 unsigned os_minor(unsigned long long dev)
573 unsigned long long os_makedev(unsigned major, unsigned minor)
575 return makedev(major, minor);