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>
20 #include "kern_util.h"
21 #include "user_util.h"
23 static void copy_stat(struct uml_stat *dst, struct stat64 *src)
25 *dst = ((struct uml_stat) {
26 .ust_dev = src->st_dev, /* device */
27 .ust_ino = src->st_ino, /* inode */
28 .ust_mode = src->st_mode, /* protection */
29 .ust_nlink = src->st_nlink, /* number of hard links */
30 .ust_uid = src->st_uid, /* user ID of owner */
31 .ust_gid = src->st_gid, /* group ID of owner */
32 .ust_size = src->st_size, /* total size, in bytes */
33 .ust_blksize = src->st_blksize, /* blocksize for filesys I/O */
34 .ust_blocks = src->st_blocks, /* number of blocks allocated */
35 .ust_atime = src->st_atime, /* time of last access */
36 .ust_mtime = src->st_mtime, /* time of last modification */
37 .ust_ctime = src->st_ctime, /* time of last change */
41 int os_stat_fd(const int fd, struct uml_stat *ubuf)
46 CATCH_EINTR(err = fstat64(fd, &sbuf));
51 copy_stat(ubuf, &sbuf);
55 int os_stat_file(const char *file_name, struct uml_stat *ubuf)
61 err = stat64(file_name, &sbuf);
62 } while((err < 0) && (errno == EINTR)) ;
68 copy_stat(ubuf, &sbuf);
72 int os_access(const char* file, int mode)
76 amode=(mode&OS_ACC_R_OK ? R_OK : 0) | (mode&OS_ACC_W_OK ? W_OK : 0) |
77 (mode&OS_ACC_X_OK ? X_OK : 0) | (mode&OS_ACC_F_OK ? F_OK : 0) ;
79 err = access(file, amode);
86 void os_print_error(int error, const char* str)
88 errno = error < 0 ? -error : error;
93 /* FIXME? required only by hostaudio (because it passes ioctls verbatim) */
94 int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg)
98 err = ioctl(fd, cmd, arg);
105 int os_window_size(int fd, int *rows, int *cols)
109 if(ioctl(fd, TIOCGWINSZ, &size) < 0)
118 int os_new_tty_pgrp(int fd, int pid)
120 if(ioctl(fd, TIOCSCTTY, 0) < 0)
123 if(tcsetpgrp(fd, pid) < 0)
129 /* FIXME: ensure namebuf in os_get_if_name is big enough */
130 int os_get_ifname(int fd, char* namebuf)
132 if(ioctl(fd, SIOCGIFNAME, namebuf) < 0)
138 int os_set_slip(int fd)
143 if(ioctl(fd, TIOCSETD, &disc) < 0)
147 if(ioctl(fd, SIOCSIFENCAP, &sencap) < 0)
153 int os_set_owner(int fd, int pid)
155 if(fcntl(fd, F_SETOWN, pid) < 0){
156 int save_errno = errno;
158 if(fcntl(fd, F_GETOWN, 0) != pid)
165 int os_mode_fd(int fd, int mode)
170 err = fchmod(fd, mode);
171 } while((err < 0) && (errno==EINTR)) ;
179 int os_file_type(char *file)
184 err = os_stat_file(file, &buf);
188 if(S_ISDIR(buf.ust_mode))
190 else if(S_ISLNK(buf.ust_mode))
191 return OS_TYPE_SYMLINK;
192 else if(S_ISCHR(buf.ust_mode))
193 return OS_TYPE_CHARDEV;
194 else if(S_ISBLK(buf.ust_mode))
195 return OS_TYPE_BLOCKDEV;
196 else if(S_ISFIFO(buf.ust_mode))
198 else if(S_ISSOCK(buf.ust_mode))
200 else return OS_TYPE_FILE;
203 int os_file_mode(char *file, struct openflags *mode_out)
207 *mode_out = OPENFLAGS();
209 err = os_access(file, OS_ACC_W_OK);
210 if((err < 0) && (err != -EACCES))
213 *mode_out = of_write(*mode_out);
215 err = os_access(file, OS_ACC_R_OK);
216 if((err < 0) && (err != -EACCES))
219 *mode_out = of_read(*mode_out);
224 int os_open_file(char *file, struct openflags flags, int mode)
228 if(flags.r && flags.w) f = O_RDWR;
229 else if(flags.r) f = O_RDONLY;
230 else if(flags.w) f = O_WRONLY;
233 if(flags.s) f |= O_SYNC;
234 if(flags.c) f |= O_CREAT;
235 if(flags.t) f |= O_TRUNC;
236 if(flags.e) f |= O_EXCL;
238 fd = open64(file, f, mode);
242 if(flags.cl && fcntl(fd, F_SETFD, 1)){
251 int os_connect_socket(char *name)
253 struct sockaddr_un sock;
256 sock.sun_family = AF_UNIX;
257 snprintf(sock.sun_path, sizeof(sock.sun_path), "%s", name);
259 fd = socket(AF_UNIX, SOCK_STREAM, 0);
265 err = connect(fd, (struct sockaddr *) &sock, sizeof(sock));
279 void os_close_file(int fd)
284 int os_seek_file(int fd, __u64 offset)
288 actual = lseek64(fd, offset, SEEK_SET);
294 static int fault_buffer(void *start, int len,
295 int (*copy_proc)(void *addr, void *buf, int len))
297 int page = getpagesize(), i;
300 for(i = 0; i < len; i += page){
301 if((*copy_proc)(start + i, &c, sizeof(c)))
304 if((len % page) != 0){
305 if((*copy_proc)(start + len - 1, &c, sizeof(c)))
311 static int file_io(int fd, void *buf, int len,
312 int (*io_proc)(int fd, void *buf, int len),
313 int (*copy_user_proc)(void *addr, void *buf, int len))
318 n = (*io_proc)(fd, buf, len);
319 if((n < 0) && (errno == EFAULT)){
320 err = fault_buffer(buf, len, copy_user_proc);
323 n = (*io_proc)(fd, buf, len);
325 } while((n < 0) && (errno == EINTR));
332 int os_read_file(int fd, void *buf, int len)
334 return file_io(fd, buf, len, (int (*)(int, void *, int)) read,
335 copy_from_user_proc);
338 int os_write_file(int fd, const void *buf, int len)
340 return file_io(fd, (void *) buf, len,
341 (int (*)(int, void *, int)) write, copy_to_user_proc);
344 int os_file_size(char *file, unsigned long long *size_out)
349 err = os_stat_file(file, &buf);
351 printk("Couldn't stat \"%s\" : err = %d\n", file, -err);
355 if(S_ISBLK(buf.ust_mode)){
358 fd = os_open_file(file, of_read(OPENFLAGS()), 0);
360 printk("Couldn't open \"%s\", errno = %d\n", file, -fd);
363 if(ioctl(fd, BLKGETSIZE, &blocks) < 0){
365 printk("Couldn't get the block size of \"%s\", "
366 "errno = %d\n", file, errno);
370 *size_out = ((long long) blocks) * 512;
374 *size_out = buf.ust_size;
378 int os_file_modtime(char *file, unsigned long *modtime)
383 err = os_stat_file(file, &buf);
385 printk("Couldn't stat \"%s\" : err = %d\n", file, -err);
389 *modtime = buf.ust_mtime;
393 int os_get_exec_close(int fd, int* close_on_exec)
398 ret = fcntl(fd, F_GETFD);
399 } while((ret < 0) && (errno == EINTR)) ;
404 *close_on_exec = (ret&FD_CLOEXEC) ? 1 : 0;
408 int os_set_exec_close(int fd, int close_on_exec)
412 if(close_on_exec) flag = FD_CLOEXEC;
416 err = fcntl(fd, F_SETFD, flag);
417 } while((err < 0) && (errno == EINTR)) ;
424 int os_pipe(int *fds, int stream, int close_on_exec)
426 int err, type = stream ? SOCK_STREAM : SOCK_DGRAM;
428 err = socketpair(AF_UNIX, type, 0, fds);
435 err = os_set_exec_close(fds[0], 1);
439 err = os_set_exec_close(fds[1], 1);
446 printk("os_pipe : Setting FD_CLOEXEC failed, err = %d\n", -err);
447 os_close_file(fds[1]);
448 os_close_file(fds[0]);
452 int os_set_fd_async(int fd, int owner)
456 /* XXX This should do F_GETFL first */
457 if(fcntl(fd, F_SETFL, O_ASYNC | O_NONBLOCK) < 0){
459 printk("os_set_fd_async : failed to set O_ASYNC and "
460 "O_NONBLOCK on fd # %d, errno = %d\n", fd, errno);
464 if(fcntl(fd, F_SETFD, 1) < 0){
465 printk("os_set_fd_async : Setting FD_CLOEXEC failed, "
466 "errno = %d\n", errno);
470 if((fcntl(fd, F_SETSIG, SIGIO) < 0) ||
471 (fcntl(fd, F_SETOWN, owner) < 0)){
473 printk("os_set_fd_async : Failed to fcntl F_SETOWN "
474 "(or F_SETSIG) fd %d to pid %d, errno = %d\n", fd,
482 int os_clear_fd_async(int fd)
484 int flags = fcntl(fd, F_GETFL);
486 flags &= ~(O_ASYNC | O_NONBLOCK);
487 if(fcntl(fd, F_SETFL, flags) < 0)
492 int os_set_fd_block(int fd, int blocking)
496 flags = fcntl(fd, F_GETFL);
498 if(blocking) flags &= ~O_NONBLOCK;
499 else flags |= O_NONBLOCK;
501 if(fcntl(fd, F_SETFL, flags) < 0)
507 int os_accept_connection(int fd)
511 new = accept(fd, NULL, 0);
529 int os_shutdown_socket(int fd, int r, int w)
533 if(r && w) what = SHUT_RDWR;
534 else if(r) what = SHUT_RD;
535 else if(w) what = SHUT_WR;
537 printk("os_shutdown_socket : neither r or w was set\n");
540 err = shutdown(fd, what);
546 int os_rcv_fd(int fd, int *helper_pid_out)
549 char buf[CMSG_SPACE(sizeof(new))];
551 struct cmsghdr *cmsg;
556 iov = ((struct iovec) { .iov_base = helper_pid_out,
557 .iov_len = sizeof(*helper_pid_out) });
560 msg.msg_control = buf;
561 msg.msg_controllen = sizeof(buf);
564 n = recvmsg(fd, &msg, 0);
568 else if(n != sizeof(iov.iov_len))
569 *helper_pid_out = -1;
571 cmsg = CMSG_FIRSTHDR(&msg);
573 printk("rcv_fd didn't receive anything, error = %d\n", errno);
576 if((cmsg->cmsg_level != SOL_SOCKET) ||
577 (cmsg->cmsg_type != SCM_RIGHTS)){
578 printk("rcv_fd didn't receive a descriptor\n");
582 new = ((int *) CMSG_DATA(cmsg))[0];
586 int os_create_unix_socket(char *file, int len, int close_on_exec)
588 struct sockaddr_un addr;
591 sock = socket(PF_UNIX, SOCK_DGRAM, 0);
596 err = os_set_exec_close(sock, 1);
598 printk("create_unix_socket : close_on_exec failed, "
602 addr.sun_family = AF_UNIX;
604 /* XXX Be more careful about overflow */
605 snprintf(addr.sun_path, len, "%s", file);
607 err = bind(sock, (struct sockaddr *) &addr, sizeof(addr));
614 void os_flush_stdout(void)
619 int os_lock_file(int fd, int excl)
621 int type = excl ? F_WRLCK : F_RDLCK;
622 struct flock lock = ((struct flock) { .l_type = type,
623 .l_whence = SEEK_SET,
628 err = fcntl(fd, F_SETLK, &lock);
633 err = fcntl(fd, F_GETLK, &lock);
639 printk("F_SETLK failed, file already locked by pid %d\n", lock.l_pid);