2 * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
11 #include <sys/types.h>
13 #include <sys/socket.h>
15 #include <sys/ioctl.h>
16 #include <sys/mount.h>
21 static void copy_stat(struct uml_stat *dst, const struct stat64 *src)
23 *dst = ((struct uml_stat) {
24 .ust_dev = src->st_dev, /* device */
25 .ust_ino = src->st_ino, /* inode */
26 .ust_mode = src->st_mode, /* protection */
27 .ust_nlink = src->st_nlink, /* number of hard links */
28 .ust_uid = src->st_uid, /* user ID of owner */
29 .ust_gid = src->st_gid, /* group ID of owner */
30 .ust_size = src->st_size, /* total size, in bytes */
31 .ust_blksize = src->st_blksize, /* blocksize for filesys I/O */
32 .ust_blocks = src->st_blocks, /* number of blocks allocated */
33 .ust_atime = src->st_atime, /* time of last access */
34 .ust_mtime = src->st_mtime, /* time of last modification */
35 .ust_ctime = src->st_ctime, /* time of last change */
39 int os_stat_fd(const int fd, struct uml_stat *ubuf)
44 CATCH_EINTR(err = fstat64(fd, &sbuf));
49 copy_stat(ubuf, &sbuf);
53 int os_stat_file(const char *file_name, struct uml_stat *ubuf)
59 err = stat64(file_name, &sbuf);
60 } while((err < 0) && (errno == EINTR)) ;
66 copy_stat(ubuf, &sbuf);
70 int os_access(const char* file, int mode)
74 amode=(mode&OS_ACC_R_OK ? R_OK : 0) | (mode&OS_ACC_W_OK ? W_OK : 0) |
75 (mode&OS_ACC_X_OK ? X_OK : 0) | (mode&OS_ACC_F_OK ? F_OK : 0) ;
77 err = access(file, amode);
84 /* FIXME? required only by hostaudio (because it passes ioctls verbatim) */
85 int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg)
89 err = ioctl(fd, cmd, arg);
96 /* FIXME: ensure namebuf in os_get_if_name is big enough */
97 int os_get_ifname(int fd, char* namebuf)
99 if(ioctl(fd, SIOCGIFNAME, namebuf) < 0)
105 int os_set_slip(int fd)
110 if(ioctl(fd, TIOCSETD, &disc) < 0)
114 if(ioctl(fd, SIOCSIFENCAP, &sencap) < 0)
120 int os_set_owner(int fd, int pid)
122 if(fcntl(fd, F_SETOWN, pid) < 0){
123 int save_errno = errno;
125 if(fcntl(fd, F_GETOWN, 0) != pid)
132 int os_mode_fd(int fd, int mode)
137 err = fchmod(fd, mode);
138 } while((err < 0) && (errno==EINTR)) ;
146 int os_file_type(char *file)
151 err = os_stat_file(file, &buf);
155 if(S_ISDIR(buf.ust_mode))
157 else if(S_ISLNK(buf.ust_mode))
158 return OS_TYPE_SYMLINK;
159 else if(S_ISCHR(buf.ust_mode))
160 return OS_TYPE_CHARDEV;
161 else if(S_ISBLK(buf.ust_mode))
162 return OS_TYPE_BLOCKDEV;
163 else if(S_ISFIFO(buf.ust_mode))
165 else if(S_ISSOCK(buf.ust_mode))
167 else return OS_TYPE_FILE;
170 int os_file_mode(const char *file, struct openflags *mode_out)
174 *mode_out = OPENFLAGS();
176 err = access(file, W_OK);
177 if(err && (errno != EACCES))
180 *mode_out = of_write(*mode_out);
182 err = access(file, R_OK);
183 if(err && (errno != EACCES))
186 *mode_out = of_read(*mode_out);
191 int os_open_file(const char *file, struct openflags flags, int mode)
195 if(flags.r && flags.w) f = O_RDWR;
196 else if(flags.r) f = O_RDONLY;
197 else if(flags.w) f = O_WRONLY;
200 if(flags.s) f |= O_SYNC;
201 if(flags.c) f |= O_CREAT;
202 if(flags.t) f |= O_TRUNC;
203 if(flags.e) f |= O_EXCL;
205 fd = open64(file, f, mode);
209 if(flags.cl && fcntl(fd, F_SETFD, 1)){
218 int os_connect_socket(const char *name)
220 struct sockaddr_un sock;
223 sock.sun_family = AF_UNIX;
224 snprintf(sock.sun_path, sizeof(sock.sun_path), "%s", name);
226 fd = socket(AF_UNIX, SOCK_STREAM, 0);
232 err = connect(fd, (struct sockaddr *) &sock, sizeof(sock));
246 void os_close_file(int fd)
251 int os_seek_file(int fd, unsigned long long offset)
253 unsigned long long actual;
255 actual = lseek64(fd, offset, SEEK_SET);
261 int os_read_file(int fd, void *buf, int len)
263 int n = read(fd, buf, len);
270 int os_write_file(int fd, const void *buf, int len)
272 int n = write(fd, (void *) buf, len);
279 int os_file_size(const char *file, unsigned long long *size_out)
284 err = os_stat_file(file, &buf);
286 printk("Couldn't stat \"%s\" : err = %d\n", file, -err);
290 if(S_ISBLK(buf.ust_mode)){
294 fd = open(file, O_RDONLY, 0);
297 printk("Couldn't open \"%s\", errno = %d\n", file,
301 if(ioctl(fd, BLKGETSIZE, &blocks) < 0){
303 printk("Couldn't get the block size of \"%s\", "
304 "errno = %d\n", file, errno);
308 *size_out = ((long long) blocks) * 512;
311 else *size_out = buf.ust_size;
316 int os_file_modtime(const char *file, unsigned long *modtime)
321 err = os_stat_file(file, &buf);
323 printk("Couldn't stat \"%s\" : err = %d\n", file, -err);
327 *modtime = buf.ust_mtime;
331 int os_set_exec_close(int fd)
335 CATCH_EINTR(err = fcntl(fd, F_SETFD, FD_CLOEXEC));
342 int os_pipe(int *fds, int stream, int close_on_exec)
344 int err, type = stream ? SOCK_STREAM : SOCK_DGRAM;
346 err = socketpair(AF_UNIX, type, 0, fds);
353 err = os_set_exec_close(fds[0]);
357 err = os_set_exec_close(fds[1]);
364 printk("os_pipe : Setting FD_CLOEXEC failed, err = %d\n", -err);
370 int os_set_fd_async(int fd)
374 flags = fcntl(fd, F_GETFL);
378 flags |= O_ASYNC | O_NONBLOCK;
379 if (fcntl(fd, F_SETFL, flags) < 0) {
381 printk("os_set_fd_async : failed to set O_ASYNC and "
382 "O_NONBLOCK on fd # %d, errno = %d\n", fd, errno);
386 if ((fcntl(fd, F_SETSIG, SIGIO) < 0) ||
387 (fcntl(fd, F_SETOWN, os_getpid()) < 0)) {
389 printk("os_set_fd_async : Failed to fcntl F_SETOWN "
390 "(or F_SETSIG) fd %d, errno = %d\n", fd, errno);
397 int os_clear_fd_async(int fd)
399 int flags = fcntl(fd, F_GETFL);
401 flags &= ~(O_ASYNC | O_NONBLOCK);
402 if(fcntl(fd, F_SETFL, flags) < 0)
407 int os_set_fd_block(int fd, int blocking)
411 flags = fcntl(fd, F_GETFL);
413 if(blocking) flags &= ~O_NONBLOCK;
414 else flags |= O_NONBLOCK;
416 if(fcntl(fd, F_SETFL, flags) < 0)
422 int os_accept_connection(int fd)
426 new = accept(fd, NULL, 0);
444 int os_shutdown_socket(int fd, int r, int w)
448 if(r && w) what = SHUT_RDWR;
449 else if(r) what = SHUT_RD;
450 else if(w) what = SHUT_WR;
452 printk("os_shutdown_socket : neither r or w was set\n");
455 err = shutdown(fd, what);
461 int os_rcv_fd(int fd, int *helper_pid_out)
464 char buf[CMSG_SPACE(sizeof(new))];
466 struct cmsghdr *cmsg;
471 iov = ((struct iovec) { .iov_base = helper_pid_out,
472 .iov_len = sizeof(*helper_pid_out) });
475 msg.msg_control = buf;
476 msg.msg_controllen = sizeof(buf);
479 n = recvmsg(fd, &msg, 0);
482 else if(n != iov.iov_len)
483 *helper_pid_out = -1;
485 cmsg = CMSG_FIRSTHDR(&msg);
487 printk("rcv_fd didn't receive anything, error = %d\n", errno);
490 if((cmsg->cmsg_level != SOL_SOCKET) ||
491 (cmsg->cmsg_type != SCM_RIGHTS)){
492 printk("rcv_fd didn't receive a descriptor\n");
496 new = ((int *) CMSG_DATA(cmsg))[0];
500 int os_create_unix_socket(const char *file, int len, int close_on_exec)
502 struct sockaddr_un addr;
505 sock = socket(PF_UNIX, SOCK_DGRAM, 0);
510 err = os_set_exec_close(sock);
512 printk("create_unix_socket : close_on_exec failed, "
516 addr.sun_family = AF_UNIX;
518 /* XXX Be more careful about overflow */
519 snprintf(addr.sun_path, len, "%s", file);
521 err = bind(sock, (struct sockaddr *) &addr, sizeof(addr));
528 void os_flush_stdout(void)
533 int os_lock_file(int fd, int excl)
535 int type = excl ? F_WRLCK : F_RDLCK;
536 struct flock lock = ((struct flock) { .l_type = type,
537 .l_whence = SEEK_SET,
542 err = fcntl(fd, F_SETLK, &lock);
547 err = fcntl(fd, F_GETLK, &lock);
553 printk("F_SETLK failed, file already locked by pid %d\n", lock.l_pid);