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 /* FIXME? required only by hostaudio (because it passes ioctls verbatim) */
86 int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg)
90 err = ioctl(fd, cmd, arg);
97 /* FIXME: ensure namebuf in os_get_if_name is big enough */
98 int os_get_ifname(int fd, char* namebuf)
100 if(ioctl(fd, SIOCGIFNAME, namebuf) < 0)
106 int os_set_slip(int fd)
111 if(ioctl(fd, TIOCSETD, &disc) < 0)
115 if(ioctl(fd, SIOCSIFENCAP, &sencap) < 0)
121 int os_set_owner(int fd, int pid)
123 if(fcntl(fd, F_SETOWN, pid) < 0){
124 int save_errno = errno;
126 if(fcntl(fd, F_GETOWN, 0) != pid)
133 int os_mode_fd(int fd, int mode)
138 err = fchmod(fd, mode);
139 } while((err < 0) && (errno==EINTR)) ;
147 int os_file_type(char *file)
152 err = os_stat_file(file, &buf);
156 if(S_ISDIR(buf.ust_mode))
158 else if(S_ISLNK(buf.ust_mode))
159 return OS_TYPE_SYMLINK;
160 else if(S_ISCHR(buf.ust_mode))
161 return OS_TYPE_CHARDEV;
162 else if(S_ISBLK(buf.ust_mode))
163 return OS_TYPE_BLOCKDEV;
164 else if(S_ISFIFO(buf.ust_mode))
166 else if(S_ISSOCK(buf.ust_mode))
168 else return OS_TYPE_FILE;
171 int os_file_mode(char *file, struct openflags *mode_out)
175 *mode_out = OPENFLAGS();
177 err = access(file, W_OK);
178 if(err && (errno != EACCES))
181 *mode_out = of_write(*mode_out);
183 err = access(file, R_OK);
184 if(err && (errno != EACCES))
187 *mode_out = of_read(*mode_out);
192 int os_open_file(char *file, struct openflags flags, int mode)
196 if(flags.r && flags.w) f = O_RDWR;
197 else if(flags.r) f = O_RDONLY;
198 else if(flags.w) f = O_WRONLY;
201 if(flags.s) f |= O_SYNC;
202 if(flags.c) f |= O_CREAT;
203 if(flags.t) f |= O_TRUNC;
204 if(flags.e) f |= O_EXCL;
206 fd = open64(file, f, mode);
210 if(flags.cl && fcntl(fd, F_SETFD, 1)){
219 int os_connect_socket(char *name)
221 struct sockaddr_un sock;
224 sock.sun_family = AF_UNIX;
225 snprintf(sock.sun_path, sizeof(sock.sun_path), "%s", name);
227 fd = socket(AF_UNIX, SOCK_STREAM, 0);
233 err = connect(fd, (struct sockaddr *) &sock, sizeof(sock));
247 void os_close_file(int fd)
252 int os_seek_file(int fd, unsigned long long offset)
254 unsigned long long actual;
256 actual = lseek64(fd, offset, SEEK_SET);
262 int os_read_file(int fd, void *buf, int len)
264 int n = read(fd, buf, len);
271 int os_write_file(int fd, const void *buf, int len)
273 int n = write(fd, (void *) buf, len);
280 int os_file_size(char *file, unsigned long long *size_out)
285 err = os_stat_file(file, &buf);
287 printk("Couldn't stat \"%s\" : err = %d\n", file, -err);
291 if(S_ISBLK(buf.ust_mode)){
295 fd = open(file, O_RDONLY, 0);
298 printk("Couldn't open \"%s\", errno = %d\n", file,
302 if(ioctl(fd, BLKGETSIZE, &blocks) < 0){
304 printk("Couldn't get the block size of \"%s\", "
305 "errno = %d\n", file, errno);
309 *size_out = ((long long) blocks) * 512;
312 else *size_out = buf.ust_size;
317 int os_file_modtime(char *file, unsigned long *modtime)
322 err = os_stat_file(file, &buf);
324 printk("Couldn't stat \"%s\" : err = %d\n", file, -err);
328 *modtime = buf.ust_mtime;
332 int os_get_exec_close(int fd, int *close_on_exec)
336 CATCH_EINTR(ret = fcntl(fd, F_GETFD));
341 *close_on_exec = (ret & FD_CLOEXEC) ? 1 : 0;
345 int os_set_exec_close(int fd)
349 CATCH_EINTR(err = fcntl(fd, F_SETFD, FD_CLOEXEC));
356 int os_pipe(int *fds, int stream, int close_on_exec)
358 int err, type = stream ? SOCK_STREAM : SOCK_DGRAM;
360 err = socketpair(AF_UNIX, type, 0, fds);
367 err = os_set_exec_close(fds[0]);
371 err = os_set_exec_close(fds[1]);
378 printk("os_pipe : Setting FD_CLOEXEC failed, err = %d\n", -err);
384 int os_set_fd_async(int fd, int owner)
388 /* XXX This should do F_GETFL first */
389 if(fcntl(fd, F_SETFL, O_ASYNC | O_NONBLOCK) < 0){
391 printk("os_set_fd_async : failed to set O_ASYNC and "
392 "O_NONBLOCK on fd # %d, errno = %d\n", fd, errno);
396 if(fcntl(fd, F_SETFD, 1) < 0){
397 printk("os_set_fd_async : Setting FD_CLOEXEC failed, "
398 "errno = %d\n", errno);
402 if((fcntl(fd, F_SETSIG, SIGIO) < 0) ||
403 (fcntl(fd, F_SETOWN, owner) < 0)){
405 printk("os_set_fd_async : Failed to fcntl F_SETOWN "
406 "(or F_SETSIG) fd %d to pid %d, errno = %d\n", fd,
414 int os_clear_fd_async(int fd)
416 int flags = fcntl(fd, F_GETFL);
418 flags &= ~(O_ASYNC | O_NONBLOCK);
419 if(fcntl(fd, F_SETFL, flags) < 0)
424 int os_set_fd_block(int fd, int blocking)
428 flags = fcntl(fd, F_GETFL);
430 if(blocking) flags &= ~O_NONBLOCK;
431 else flags |= O_NONBLOCK;
433 if(fcntl(fd, F_SETFL, flags) < 0)
439 int os_accept_connection(int fd)
443 new = accept(fd, NULL, 0);
461 int os_shutdown_socket(int fd, int r, int w)
465 if(r && w) what = SHUT_RDWR;
466 else if(r) what = SHUT_RD;
467 else if(w) what = SHUT_WR;
469 printk("os_shutdown_socket : neither r or w was set\n");
472 err = shutdown(fd, what);
478 int os_rcv_fd(int fd, int *helper_pid_out)
481 char buf[CMSG_SPACE(sizeof(new))];
483 struct cmsghdr *cmsg;
488 iov = ((struct iovec) { .iov_base = helper_pid_out,
489 .iov_len = sizeof(*helper_pid_out) });
492 msg.msg_control = buf;
493 msg.msg_controllen = sizeof(buf);
496 n = recvmsg(fd, &msg, 0);
500 else if(n != sizeof(iov.iov_len))
501 *helper_pid_out = -1;
503 cmsg = CMSG_FIRSTHDR(&msg);
505 printk("rcv_fd didn't receive anything, error = %d\n", errno);
508 if((cmsg->cmsg_level != SOL_SOCKET) ||
509 (cmsg->cmsg_type != SCM_RIGHTS)){
510 printk("rcv_fd didn't receive a descriptor\n");
514 new = ((int *) CMSG_DATA(cmsg))[0];
518 int os_create_unix_socket(char *file, int len, int close_on_exec)
520 struct sockaddr_un addr;
523 sock = socket(PF_UNIX, SOCK_DGRAM, 0);
528 err = os_set_exec_close(sock);
530 printk("create_unix_socket : close_on_exec failed, "
534 addr.sun_family = AF_UNIX;
536 /* XXX Be more careful about overflow */
537 snprintf(addr.sun_path, len, "%s", file);
539 err = bind(sock, (struct sockaddr *) &addr, sizeof(addr));
546 void os_flush_stdout(void)
551 int os_lock_file(int fd, int excl)
553 int type = excl ? F_WRLCK : F_RDLCK;
554 struct flock lock = ((struct flock) { .l_type = type,
555 .l_whence = SEEK_SET,
560 err = fcntl(fd, F_SETLK, &lock);
565 err = fcntl(fd, F_GETLK, &lock);
571 printk("F_SETLK failed, file already locked by pid %d\n", lock.l_pid);