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"
22 static void copy_stat(struct uml_stat *dst, struct stat64 *src)
24 *dst = ((struct uml_stat) {
25 .ust_dev = src->st_dev, /* device */
26 .ust_ino = src->st_ino, /* inode */
27 .ust_mode = src->st_mode, /* protection */
28 .ust_nlink = src->st_nlink, /* number of hard links */
29 .ust_uid = src->st_uid, /* user ID of owner */
30 .ust_gid = src->st_gid, /* group ID of owner */
31 .ust_size = src->st_size, /* total size, in bytes */
32 .ust_blksize = src->st_blksize, /* blocksize for filesys I/O */
33 .ust_blocks = src->st_blocks, /* number of blocks allocated */
34 .ust_atime = src->st_atime, /* time of last access */
35 .ust_mtime = src->st_mtime, /* time of last modification */
36 .ust_ctime = src->st_ctime, /* time of last change */
40 int os_stat_fd(const int fd, struct uml_stat *ubuf)
46 err = fstat64(fd, &sbuf);
47 } while((err < 0) && (errno == EINTR)) ;
53 copy_stat(ubuf, &sbuf);
57 int os_stat_file(const char *file_name, struct uml_stat *ubuf)
63 err = stat64(file_name, &sbuf);
64 } while((err < 0) && (errno == EINTR)) ;
70 copy_stat(ubuf, &sbuf);
74 int os_access(const char* file, int mode)
78 amode=(mode&OS_ACC_R_OK ? R_OK : 0) | (mode&OS_ACC_W_OK ? W_OK : 0) |
79 (mode&OS_ACC_X_OK ? X_OK : 0) | (mode&OS_ACC_F_OK ? F_OK : 0) ;
81 err = access(file, amode);
88 void os_print_error(int error, const char* str)
90 errno = error < 0 ? -error : error;
95 /* FIXME? required only by hostaudio (because it passes ioctls verbatim) */
96 int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg)
100 err = ioctl(fd, cmd, arg);
107 int os_window_size(int fd, int *rows, int *cols)
111 if(ioctl(fd, TIOCGWINSZ, &size) < 0)
120 int os_new_tty_pgrp(int fd, int pid)
122 if(ioctl(fd, TIOCSCTTY, 0) < 0)
125 if(tcsetpgrp(fd, pid) < 0)
131 /* FIXME: ensure namebuf in os_get_if_name is big enough */
132 int os_get_ifname(int fd, char* namebuf)
134 if(ioctl(fd, SIOCGIFNAME, namebuf) < 0)
140 int os_set_slip(int fd)
145 if(ioctl(fd, TIOCSETD, &disc) < 0)
149 if(ioctl(fd, SIOCSIFENCAP, &sencap) < 0)
155 int os_set_owner(int fd, int pid)
157 if(fcntl(fd, F_SETOWN, pid) < 0){
158 int save_errno = errno;
160 if(fcntl(fd, F_GETOWN, 0) != pid)
167 /* FIXME? moved wholesale from sigio_user.c to get fcntls out of that file */
168 int os_sigio_async(int master, int slave)
172 flags = fcntl(master, F_GETFL);
176 if((fcntl(master, F_SETFL, flags | O_NONBLOCK | O_ASYNC) < 0) ||
177 (fcntl(master, F_SETOWN, os_getpid()) < 0))
180 if((fcntl(slave, F_SETFL, flags | O_NONBLOCK) < 0))
186 int os_mode_fd(int fd, int mode)
191 err = fchmod(fd, mode);
192 } while((err < 0) && (errno==EINTR)) ;
200 int os_file_type(char *file)
205 err = os_stat_file(file, &buf);
209 if(S_ISDIR(buf.ust_mode))
211 else if(S_ISLNK(buf.ust_mode))
212 return OS_TYPE_SYMLINK;
213 else if(S_ISCHR(buf.ust_mode))
214 return OS_TYPE_CHARDEV;
215 else if(S_ISBLK(buf.ust_mode))
216 return OS_TYPE_BLOCKDEV;
217 else if(S_ISFIFO(buf.ust_mode))
219 else if(S_ISSOCK(buf.ust_mode))
221 else return OS_TYPE_FILE;
224 int os_file_mode(char *file, struct openflags *mode_out)
228 *mode_out = OPENFLAGS();
230 err = os_access(file, OS_ACC_W_OK);
231 if((err < 0) && (err != -EACCES))
234 *mode_out = of_write(*mode_out);
236 err = os_access(file, OS_ACC_R_OK);
237 if((err < 0) && (err != -EACCES))
240 *mode_out = of_read(*mode_out);
245 int os_open_file(char *file, struct openflags flags, int mode)
249 if(flags.r && flags.w) f = O_RDWR;
250 else if(flags.r) f = O_RDONLY;
251 else if(flags.w) f = O_WRONLY;
254 if(flags.s) f |= O_SYNC;
255 if(flags.c) f |= O_CREAT;
256 if(flags.t) f |= O_TRUNC;
257 if(flags.e) f |= O_EXCL;
259 fd = open64(file, f, mode);
263 if(flags.cl && fcntl(fd, F_SETFD, 1)){
272 int os_connect_socket(char *name)
274 struct sockaddr_un sock;
277 sock.sun_family = AF_UNIX;
278 snprintf(sock.sun_path, sizeof(sock.sun_path), "%s", name);
280 fd = socket(AF_UNIX, SOCK_STREAM, 0);
286 err = connect(fd, (struct sockaddr *) &sock, sizeof(sock));
300 void os_close_file(int fd)
305 int os_seek_file(int fd, __u64 offset)
309 actual = lseek64(fd, offset, SEEK_SET);
315 static int fault_buffer(void *start, int len,
316 int (*copy_proc)(void *addr, void *buf, int len))
318 int page = getpagesize(), i;
321 for(i = 0; i < len; i += page){
322 if((*copy_proc)(start + i, &c, sizeof(c)))
325 if((len % page) != 0){
326 if((*copy_proc)(start + len - 1, &c, sizeof(c)))
332 static int file_io(int fd, void *buf, int len,
333 int (*io_proc)(int fd, void *buf, int len),
334 int (*copy_user_proc)(void *addr, void *buf, int len))
339 n = (*io_proc)(fd, buf, len);
340 if((n < 0) && (errno == EFAULT)){
341 err = fault_buffer(buf, len, copy_user_proc);
344 n = (*io_proc)(fd, buf, len);
346 } while((n < 0) && (errno == EINTR));
353 int os_read_file(int fd, void *buf, int len)
355 return file_io(fd, buf, len, (int (*)(int, void *, int)) read,
356 copy_from_user_proc);
359 int os_write_file(int fd, const void *buf, int len)
361 return file_io(fd, (void *) buf, len,
362 (int (*)(int, void *, int)) write, copy_to_user_proc);
365 int os_file_size(char *file, unsigned long long *size_out)
370 err = os_stat_file(file, &buf);
372 printk("Couldn't stat \"%s\" : err = %d\n", file, -err);
376 if(S_ISBLK(buf.ust_mode)){
379 fd = os_open_file(file, of_read(OPENFLAGS()), 0);
381 printk("Couldn't open \"%s\", errno = %d\n", file, -fd);
384 if(ioctl(fd, BLKGETSIZE, &blocks) < 0){
386 printk("Couldn't get the block size of \"%s\", "
387 "errno = %d\n", file, errno);
391 *size_out = ((long long) blocks) * 512;
395 *size_out = buf.ust_size;
399 int os_file_modtime(char *file, unsigned long *modtime)
404 err = os_stat_file(file, &buf);
406 printk("Couldn't stat \"%s\" : err = %d\n", file, -err);
410 *modtime = buf.ust_mtime;
414 int os_get_exec_close(int fd, int* close_on_exec)
419 ret = fcntl(fd, F_GETFD);
420 } while((ret < 0) && (errno == EINTR)) ;
425 *close_on_exec = (ret&FD_CLOEXEC) ? 1 : 0;
429 int os_set_exec_close(int fd, int close_on_exec)
433 if(close_on_exec) flag = FD_CLOEXEC;
437 err = fcntl(fd, F_SETFD, flag);
438 } while((err < 0) && (errno == EINTR)) ;
445 int os_pipe(int *fds, int stream, int close_on_exec)
447 int err, type = stream ? SOCK_STREAM : SOCK_DGRAM;
449 err = socketpair(AF_UNIX, type, 0, fds);
456 err = os_set_exec_close(fds[0], 1);
460 err = os_set_exec_close(fds[1], 1);
467 printk("os_pipe : Setting FD_CLOEXEC failed, err = %d\n", -err);
468 os_close_file(fds[1]);
469 os_close_file(fds[0]);
473 int os_set_fd_async(int fd, int owner)
477 /* XXX This should do F_GETFL first */
478 if(fcntl(fd, F_SETFL, O_ASYNC | O_NONBLOCK) < 0){
480 printk("os_set_fd_async : failed to set O_ASYNC and "
481 "O_NONBLOCK on fd # %d, errno = %d\n", fd, errno);
485 if(fcntl(fd, F_SETFD, 1) < 0){
486 printk("os_set_fd_async : Setting FD_CLOEXEC failed, "
487 "errno = %d\n", errno);
491 if((fcntl(fd, F_SETSIG, SIGIO) < 0) ||
492 (fcntl(fd, F_SETOWN, owner) < 0)){
494 printk("os_set_fd_async : Failed to fcntl F_SETOWN "
495 "(or F_SETSIG) fd %d to pid %d, errno = %d\n", fd,
503 int os_clear_fd_async(int fd)
505 int flags = fcntl(fd, F_GETFL);
507 flags &= ~(O_ASYNC | O_NONBLOCK);
508 if(fcntl(fd, F_SETFL, flags) < 0)
513 int os_set_fd_block(int fd, int blocking)
517 flags = fcntl(fd, F_GETFL);
519 if(blocking) flags &= ~O_NONBLOCK;
520 else flags |= O_NONBLOCK;
522 if(fcntl(fd, F_SETFL, flags) < 0)
528 int os_accept_connection(int fd)
532 new = accept(fd, NULL, 0);
550 int os_shutdown_socket(int fd, int r, int w)
554 if(r && w) what = SHUT_RDWR;
555 else if(r) what = SHUT_RD;
556 else if(w) what = SHUT_WR;
558 printk("os_shutdown_socket : neither r or w was set\n");
561 err = shutdown(fd, what);
567 int os_rcv_fd(int fd, int *helper_pid_out)
570 char buf[CMSG_SPACE(sizeof(new))];
572 struct cmsghdr *cmsg;
577 iov = ((struct iovec) { .iov_base = helper_pid_out,
578 .iov_len = sizeof(*helper_pid_out) });
581 msg.msg_control = buf;
582 msg.msg_controllen = sizeof(buf);
585 n = recvmsg(fd, &msg, 0);
589 else if(n != sizeof(iov.iov_len))
590 *helper_pid_out = -1;
592 cmsg = CMSG_FIRSTHDR(&msg);
594 printk("rcv_fd didn't receive anything, error = %d\n", errno);
597 if((cmsg->cmsg_level != SOL_SOCKET) ||
598 (cmsg->cmsg_type != SCM_RIGHTS)){
599 printk("rcv_fd didn't receive a descriptor\n");
603 new = ((int *) CMSG_DATA(cmsg))[0];
607 int os_create_unix_socket(char *file, int len, int close_on_exec)
609 struct sockaddr_un addr;
612 sock = socket(PF_UNIX, SOCK_DGRAM, 0);
617 err = os_set_exec_close(sock, 1);
619 printk("create_unix_socket : close_on_exec failed, "
623 addr.sun_family = AF_UNIX;
625 /* XXX Be more careful about overflow */
626 snprintf(addr.sun_path, len, "%s", file);
628 err = bind(sock, (struct sockaddr *) &addr, sizeof(addr));
635 void os_flush_stdout(void)
640 int os_lock_file(int fd, int excl)
642 int type = excl ? F_WRLCK : F_RDLCK;
643 struct flock lock = ((struct flock) { .l_type = type,
644 .l_whence = SEEK_SET,
649 err = fcntl(fd, F_SETLK, &lock);
654 err = fcntl(fd, F_GETLK, &lock);
660 printk("F_SETLK failed, file already locked by pid %d\n", lock.l_pid);