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>
16 #include <sys/types.h>
19 static void copy_stat(struct uml_stat *dst, const struct stat64 *src)
21 *dst = ((struct uml_stat) {
22 .ust_dev = src->st_dev, /* device */
23 .ust_ino = src->st_ino, /* inode */
24 .ust_mode = src->st_mode, /* protection */
25 .ust_nlink = src->st_nlink, /* number of hard links */
26 .ust_uid = src->st_uid, /* user ID of owner */
27 .ust_gid = src->st_gid, /* group ID of owner */
28 .ust_size = src->st_size, /* total size, in bytes */
29 .ust_blksize = src->st_blksize, /* blocksize for filesys I/O */
30 .ust_blocks = src->st_blocks, /* number of blocks allocated */
31 .ust_atime = src->st_atime, /* time of last access */
32 .ust_mtime = src->st_mtime, /* time of last modification */
33 .ust_ctime = src->st_ctime, /* time of last change */
37 int os_stat_fd(const int fd, struct uml_stat *ubuf)
42 CATCH_EINTR(err = fstat64(fd, &sbuf));
47 copy_stat(ubuf, &sbuf);
51 int os_stat_file(const char *file_name, struct uml_stat *ubuf)
56 CATCH_EINTR(err = stat64(file_name, &sbuf));
61 copy_stat(ubuf, &sbuf);
65 int os_access(const char *file, int mode)
69 amode = (mode & OS_ACC_R_OK ? R_OK : 0) |
70 (mode & OS_ACC_W_OK ? W_OK : 0) |
71 (mode & OS_ACC_X_OK ? X_OK : 0) |
72 (mode & OS_ACC_F_OK ? F_OK : 0);
74 err = access(file, amode);
81 /* FIXME? required only by hostaudio (because it passes ioctls verbatim) */
82 int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg)
86 err = ioctl(fd, cmd, arg);
93 /* FIXME: ensure namebuf in os_get_if_name is big enough */
94 int os_get_ifname(int fd, char* namebuf)
96 if (ioctl(fd, SIOCGIFNAME, namebuf) < 0)
102 int os_set_slip(int fd)
107 if (ioctl(fd, TIOCSETD, &disc) < 0)
111 if (ioctl(fd, SIOCSIFENCAP, &sencap) < 0)
117 int os_mode_fd(int fd, int mode)
121 CATCH_EINTR(err = fchmod(fd, mode));
128 int os_file_type(char *file)
133 err = os_stat_file(file, &buf);
137 if (S_ISDIR(buf.ust_mode))
139 else if (S_ISLNK(buf.ust_mode))
140 return OS_TYPE_SYMLINK;
141 else if (S_ISCHR(buf.ust_mode))
142 return OS_TYPE_CHARDEV;
143 else if (S_ISBLK(buf.ust_mode))
144 return OS_TYPE_BLOCKDEV;
145 else if (S_ISFIFO(buf.ust_mode))
147 else if (S_ISSOCK(buf.ust_mode))
149 else return OS_TYPE_FILE;
152 int os_file_mode(const char *file, struct openflags *mode_out)
156 *mode_out = OPENFLAGS();
158 err = access(file, W_OK);
159 if (err && (errno != EACCES))
162 *mode_out = of_write(*mode_out);
164 err = access(file, R_OK);
165 if (err && (errno != EACCES))
168 *mode_out = of_read(*mode_out);
173 int os_open_file(const char *file, struct openflags flags, int mode)
177 if (flags.r && flags.w)
196 fd = open64(file, f, mode);
200 if (flags.cl && fcntl(fd, F_SETFD, 1)) {
209 int os_connect_socket(const char *name)
211 struct sockaddr_un sock;
214 sock.sun_family = AF_UNIX;
215 snprintf(sock.sun_path, sizeof(sock.sun_path), "%s", name);
217 fd = socket(AF_UNIX, SOCK_STREAM, 0);
223 err = connect(fd, (struct sockaddr *) &sock, sizeof(sock));
237 void os_close_file(int fd)
241 int os_fsync_file(int fd)
248 int os_seek_file(int fd, unsigned long long offset)
250 unsigned long long actual;
252 actual = lseek64(fd, offset, SEEK_SET);
253 if (actual != offset)
258 int os_read_file(int fd, void *buf, int len)
260 int n = read(fd, buf, len);
267 int os_pread_file(int fd, void *buf, int len, unsigned long long offset)
269 int n = pread(fd, buf, len, offset);
276 int os_write_file(int fd, const void *buf, int len)
278 int n = write(fd, (void *) buf, len);
285 int os_sync_file(int fd)
294 int os_pwrite_file(int fd, const void *buf, int len, unsigned long long offset)
296 int n = pwrite(fd, (void *) buf, len, offset);
304 int os_file_size(const char *file, unsigned long long *size_out)
309 err = os_stat_file(file, &buf);
311 printk(UM_KERN_ERR "Couldn't stat \"%s\" : err = %d\n", file,
316 if (S_ISBLK(buf.ust_mode)) {
320 fd = open(file, O_RDONLY, 0);
323 printk(UM_KERN_ERR "Couldn't open \"%s\", "
324 "errno = %d\n", file, errno);
327 if (ioctl(fd, BLKGETSIZE, &blocks) < 0) {
329 printk(UM_KERN_ERR "Couldn't get the block size of "
330 "\"%s\", errno = %d\n", file, errno);
334 *size_out = ((long long) blocks) * 512;
337 else *size_out = buf.ust_size;
342 int os_file_modtime(const char *file, unsigned long *modtime)
347 err = os_stat_file(file, &buf);
349 printk(UM_KERN_ERR "Couldn't stat \"%s\" : err = %d\n", file,
354 *modtime = buf.ust_mtime;
358 int os_set_exec_close(int fd)
362 CATCH_EINTR(err = fcntl(fd, F_SETFD, FD_CLOEXEC));
369 int os_pipe(int *fds, int stream, int close_on_exec)
371 int err, type = stream ? SOCK_STREAM : SOCK_DGRAM;
373 err = socketpair(AF_UNIX, type, 0, fds);
380 err = os_set_exec_close(fds[0]);
384 err = os_set_exec_close(fds[1]);
391 printk(UM_KERN_ERR "os_pipe : Setting FD_CLOEXEC failed, err = %d\n",
398 int os_set_fd_async(int fd)
402 flags = fcntl(fd, F_GETFL);
406 flags |= O_ASYNC | O_NONBLOCK;
407 if (fcntl(fd, F_SETFL, flags) < 0) {
409 printk(UM_KERN_ERR "os_set_fd_async : failed to set O_ASYNC "
410 "and O_NONBLOCK on fd # %d, errno = %d\n", fd, errno);
414 if ((fcntl(fd, F_SETSIG, SIGIO) < 0) ||
415 (fcntl(fd, F_SETOWN, os_getpid()) < 0)) {
417 printk(UM_KERN_ERR "os_set_fd_async : Failed to fcntl F_SETOWN "
418 "(or F_SETSIG) fd %d, errno = %d\n", fd, errno);
425 int os_clear_fd_async(int fd)
429 flags = fcntl(fd, F_GETFL);
433 flags &= ~(O_ASYNC | O_NONBLOCK);
434 if (fcntl(fd, F_SETFL, flags) < 0)
439 int os_set_fd_block(int fd, int blocking)
443 flags = fcntl(fd, F_GETFL);
448 flags &= ~O_NONBLOCK;
452 if (fcntl(fd, F_SETFL, flags) < 0)
458 int os_accept_connection(int fd)
462 new = accept(fd, NULL, 0);
480 int os_shutdown_socket(int fd, int r, int w)
493 err = shutdown(fd, what);
499 int os_rcv_fd(int fd, int *helper_pid_out)
502 char buf[CMSG_SPACE(sizeof(new))];
504 struct cmsghdr *cmsg;
509 iov = ((struct iovec) { .iov_base = helper_pid_out,
510 .iov_len = sizeof(*helper_pid_out) });
513 msg.msg_control = buf;
514 msg.msg_controllen = sizeof(buf);
517 n = recvmsg(fd, &msg, 0);
520 else if (n != iov.iov_len)
521 *helper_pid_out = -1;
523 cmsg = CMSG_FIRSTHDR(&msg);
525 printk(UM_KERN_ERR "rcv_fd didn't receive anything, "
526 "error = %d\n", errno);
529 if ((cmsg->cmsg_level != SOL_SOCKET) ||
530 (cmsg->cmsg_type != SCM_RIGHTS)) {
531 printk(UM_KERN_ERR "rcv_fd didn't receive a descriptor\n");
535 new = ((int *) CMSG_DATA(cmsg))[0];
539 int os_create_unix_socket(const char *file, int len, int close_on_exec)
541 struct sockaddr_un addr;
544 sock = socket(PF_UNIX, SOCK_DGRAM, 0);
549 err = os_set_exec_close(sock);
551 printk(UM_KERN_ERR "create_unix_socket : "
552 "close_on_exec failed, err = %d", -err);
555 addr.sun_family = AF_UNIX;
557 snprintf(addr.sun_path, len, "%s", file);
559 err = bind(sock, (struct sockaddr *) &addr, sizeof(addr));
566 void os_flush_stdout(void)
571 int os_lock_file(int fd, int excl)
573 int type = excl ? F_WRLCK : F_RDLCK;
574 struct flock lock = ((struct flock) { .l_type = type,
575 .l_whence = SEEK_SET,
580 err = fcntl(fd, F_SETLK, &lock);
585 err = fcntl(fd, F_GETLK, &lock);
591 printk(UM_KERN_ERR "F_SETLK failed, file already locked by pid %d\n",
598 unsigned os_major(unsigned long long dev)
603 unsigned os_minor(unsigned long long dev)
608 unsigned long long os_makedev(unsigned major, unsigned minor)
610 return makedev(major, minor);