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)
45 CATCH_EINTR(err = fstat64(fd, &sbuf));
50 copy_stat(ubuf, &sbuf);
54 int os_stat_file(const char *file_name, struct uml_stat *ubuf)
60 err = stat64(file_name, &sbuf);
61 } while((err < 0) && (errno == EINTR)) ;
67 copy_stat(ubuf, &sbuf);
71 int os_access(const char* file, int mode)
75 amode=(mode&OS_ACC_R_OK ? R_OK : 0) | (mode&OS_ACC_W_OK ? W_OK : 0) |
76 (mode&OS_ACC_X_OK ? X_OK : 0) | (mode&OS_ACC_F_OK ? F_OK : 0) ;
78 err = access(file, amode);
85 void os_print_error(int error, const char* str)
87 errno = error < 0 ? -error : error;
92 /* FIXME? required only by hostaudio (because it passes ioctls verbatim) */
93 int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg)
97 err = ioctl(fd, cmd, arg);
104 int os_window_size(int fd, int *rows, int *cols)
108 if(ioctl(fd, TIOCGWINSZ, &size) < 0)
117 int os_new_tty_pgrp(int fd, int pid)
119 if(ioctl(fd, TIOCSCTTY, 0) < 0)
122 if(tcsetpgrp(fd, pid) < 0)
128 /* FIXME: ensure namebuf in os_get_if_name is big enough */
129 int os_get_ifname(int fd, char* namebuf)
131 if(ioctl(fd, SIOCGIFNAME, namebuf) < 0)
137 int os_set_slip(int fd)
142 if(ioctl(fd, TIOCSETD, &disc) < 0)
146 if(ioctl(fd, SIOCSIFENCAP, &sencap) < 0)
152 int os_set_owner(int fd, int pid)
154 if(fcntl(fd, F_SETOWN, pid) < 0){
155 int save_errno = errno;
157 if(fcntl(fd, F_GETOWN, 0) != pid)
164 int os_mode_fd(int fd, int mode)
169 err = fchmod(fd, mode);
170 } while((err < 0) && (errno==EINTR)) ;
178 int os_file_type(char *file)
183 err = os_stat_file(file, &buf);
187 if(S_ISDIR(buf.ust_mode))
189 else if(S_ISLNK(buf.ust_mode))
190 return OS_TYPE_SYMLINK;
191 else if(S_ISCHR(buf.ust_mode))
192 return OS_TYPE_CHARDEV;
193 else if(S_ISBLK(buf.ust_mode))
194 return OS_TYPE_BLOCKDEV;
195 else if(S_ISFIFO(buf.ust_mode))
197 else if(S_ISSOCK(buf.ust_mode))
199 else return OS_TYPE_FILE;
202 int os_file_mode(char *file, struct openflags *mode_out)
206 *mode_out = OPENFLAGS();
208 err = os_access(file, OS_ACC_W_OK);
209 if((err < 0) && (err != -EACCES))
212 *mode_out = of_write(*mode_out);
214 err = os_access(file, OS_ACC_R_OK);
215 if((err < 0) && (err != -EACCES))
218 *mode_out = of_read(*mode_out);
223 int os_open_file(char *file, struct openflags flags, int mode)
227 if(flags.r && flags.w) f = O_RDWR;
228 else if(flags.r) f = O_RDONLY;
229 else if(flags.w) f = O_WRONLY;
232 if(flags.s) f |= O_SYNC;
233 if(flags.c) f |= O_CREAT;
234 if(flags.t) f |= O_TRUNC;
235 if(flags.e) f |= O_EXCL;
237 fd = open64(file, f, mode);
241 if(flags.cl && fcntl(fd, F_SETFD, 1)){
250 int os_connect_socket(char *name)
252 struct sockaddr_un sock;
255 sock.sun_family = AF_UNIX;
256 snprintf(sock.sun_path, sizeof(sock.sun_path), "%s", name);
258 fd = socket(AF_UNIX, SOCK_STREAM, 0);
264 err = connect(fd, (struct sockaddr *) &sock, sizeof(sock));
278 void os_close_file(int fd)
283 int os_seek_file(int fd, __u64 offset)
287 actual = lseek64(fd, offset, SEEK_SET);
293 int os_read_file(int fd, void *buf, int len)
295 int n = read(fd, buf, len);
302 int os_write_file(int fd, const void *buf, int len)
304 int n = write(fd, (void *) buf, len);
311 int os_file_size(char *file, unsigned long long *size_out)
316 err = os_stat_file(file, &buf);
318 printk("Couldn't stat \"%s\" : err = %d\n", file, -err);
322 if(S_ISBLK(buf.ust_mode)){
326 fd = os_open_file(file, of_read(OPENFLAGS()), 0);
328 printk("Couldn't open \"%s\", errno = %d\n", file, -fd);
331 if(ioctl(fd, BLKGETSIZE, &blocks) < 0){
333 printk("Couldn't get the block size of \"%s\", "
334 "errno = %d\n", file, errno);
338 *size_out = ((long long) blocks) * 512;
342 *size_out = buf.ust_size;
346 int os_file_modtime(char *file, unsigned long *modtime)
351 err = os_stat_file(file, &buf);
353 printk("Couldn't stat \"%s\" : err = %d\n", file, -err);
357 *modtime = buf.ust_mtime;
361 int os_get_exec_close(int fd, int* close_on_exec)
366 ret = fcntl(fd, F_GETFD);
367 } while((ret < 0) && (errno == EINTR)) ;
372 *close_on_exec = (ret&FD_CLOEXEC) ? 1 : 0;
376 int os_set_exec_close(int fd, int close_on_exec)
380 if(close_on_exec) flag = FD_CLOEXEC;
384 err = fcntl(fd, F_SETFD, flag);
385 } while((err < 0) && (errno == EINTR)) ;
392 int os_pipe(int *fds, int stream, int close_on_exec)
394 int err, type = stream ? SOCK_STREAM : SOCK_DGRAM;
396 err = socketpair(AF_UNIX, type, 0, fds);
403 err = os_set_exec_close(fds[0], 1);
407 err = os_set_exec_close(fds[1], 1);
414 printk("os_pipe : Setting FD_CLOEXEC failed, err = %d\n", -err);
415 os_close_file(fds[1]);
416 os_close_file(fds[0]);
420 int os_set_fd_async(int fd, int owner)
424 /* XXX This should do F_GETFL first */
425 if(fcntl(fd, F_SETFL, O_ASYNC | O_NONBLOCK) < 0){
427 printk("os_set_fd_async : failed to set O_ASYNC and "
428 "O_NONBLOCK on fd # %d, errno = %d\n", fd, errno);
432 if(fcntl(fd, F_SETFD, 1) < 0){
433 printk("os_set_fd_async : Setting FD_CLOEXEC failed, "
434 "errno = %d\n", errno);
438 if((fcntl(fd, F_SETSIG, SIGIO) < 0) ||
439 (fcntl(fd, F_SETOWN, owner) < 0)){
441 printk("os_set_fd_async : Failed to fcntl F_SETOWN "
442 "(or F_SETSIG) fd %d to pid %d, errno = %d\n", fd,
450 int os_clear_fd_async(int fd)
452 int flags = fcntl(fd, F_GETFL);
454 flags &= ~(O_ASYNC | O_NONBLOCK);
455 if(fcntl(fd, F_SETFL, flags) < 0)
460 int os_set_fd_block(int fd, int blocking)
464 flags = fcntl(fd, F_GETFL);
466 if(blocking) flags &= ~O_NONBLOCK;
467 else flags |= O_NONBLOCK;
469 if(fcntl(fd, F_SETFL, flags) < 0)
475 int os_accept_connection(int fd)
479 new = accept(fd, NULL, 0);
497 int os_shutdown_socket(int fd, int r, int w)
501 if(r && w) what = SHUT_RDWR;
502 else if(r) what = SHUT_RD;
503 else if(w) what = SHUT_WR;
505 printk("os_shutdown_socket : neither r or w was set\n");
508 err = shutdown(fd, what);
514 int os_rcv_fd(int fd, int *helper_pid_out)
517 char buf[CMSG_SPACE(sizeof(new))];
519 struct cmsghdr *cmsg;
524 iov = ((struct iovec) { .iov_base = helper_pid_out,
525 .iov_len = sizeof(*helper_pid_out) });
528 msg.msg_control = buf;
529 msg.msg_controllen = sizeof(buf);
532 n = recvmsg(fd, &msg, 0);
536 else if(n != sizeof(iov.iov_len))
537 *helper_pid_out = -1;
539 cmsg = CMSG_FIRSTHDR(&msg);
541 printk("rcv_fd didn't receive anything, error = %d\n", errno);
544 if((cmsg->cmsg_level != SOL_SOCKET) ||
545 (cmsg->cmsg_type != SCM_RIGHTS)){
546 printk("rcv_fd didn't receive a descriptor\n");
550 new = ((int *) CMSG_DATA(cmsg))[0];
554 int os_create_unix_socket(char *file, int len, int close_on_exec)
556 struct sockaddr_un addr;
559 sock = socket(PF_UNIX, SOCK_DGRAM, 0);
564 err = os_set_exec_close(sock, 1);
566 printk("create_unix_socket : close_on_exec failed, "
570 addr.sun_family = AF_UNIX;
572 /* XXX Be more careful about overflow */
573 snprintf(addr.sun_path, len, "%s", file);
575 err = bind(sock, (struct sockaddr *) &addr, sizeof(addr));
582 void os_flush_stdout(void)
587 int os_lock_file(int fd, int excl)
589 int type = excl ? F_WRLCK : F_RDLCK;
590 struct flock lock = ((struct flock) { .l_type = type,
591 .l_whence = SEEK_SET,
596 err = fcntl(fd, F_SETLK, &lock);
601 err = fcntl(fd, F_GETLK, &lock);
607 printk("F_SETLK failed, file already locked by pid %d\n", lock.l_pid);