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_new_tty_pgrp(int fd, int pid)
106 if(ioctl(fd, TIOCSCTTY, 0) < 0)
109 if(tcsetpgrp(fd, pid) < 0)
115 /* FIXME: ensure namebuf in os_get_if_name is big enough */
116 int os_get_ifname(int fd, char* namebuf)
118 if(ioctl(fd, SIOCGIFNAME, namebuf) < 0)
124 int os_set_slip(int fd)
129 if(ioctl(fd, TIOCSETD, &disc) < 0)
133 if(ioctl(fd, SIOCSIFENCAP, &sencap) < 0)
139 int os_set_owner(int fd, int pid)
141 if(fcntl(fd, F_SETOWN, pid) < 0){
142 int save_errno = errno;
144 if(fcntl(fd, F_GETOWN, 0) != pid)
151 int os_mode_fd(int fd, int mode)
156 err = fchmod(fd, mode);
157 } while((err < 0) && (errno==EINTR)) ;
165 int os_file_type(char *file)
170 err = os_stat_file(file, &buf);
174 if(S_ISDIR(buf.ust_mode))
176 else if(S_ISLNK(buf.ust_mode))
177 return OS_TYPE_SYMLINK;
178 else if(S_ISCHR(buf.ust_mode))
179 return OS_TYPE_CHARDEV;
180 else if(S_ISBLK(buf.ust_mode))
181 return OS_TYPE_BLOCKDEV;
182 else if(S_ISFIFO(buf.ust_mode))
184 else if(S_ISSOCK(buf.ust_mode))
186 else return OS_TYPE_FILE;
189 int os_file_mode(char *file, struct openflags *mode_out)
193 *mode_out = OPENFLAGS();
195 err = os_access(file, OS_ACC_W_OK);
196 if((err < 0) && (err != -EACCES))
199 *mode_out = of_write(*mode_out);
201 err = os_access(file, OS_ACC_R_OK);
202 if((err < 0) && (err != -EACCES))
205 *mode_out = of_read(*mode_out);
210 int os_open_file(char *file, struct openflags flags, int mode)
214 if(flags.r && flags.w) f = O_RDWR;
215 else if(flags.r) f = O_RDONLY;
216 else if(flags.w) f = O_WRONLY;
219 if(flags.s) f |= O_SYNC;
220 if(flags.c) f |= O_CREAT;
221 if(flags.t) f |= O_TRUNC;
222 if(flags.e) f |= O_EXCL;
224 fd = open64(file, f, mode);
228 if(flags.cl && fcntl(fd, F_SETFD, 1)){
237 int os_connect_socket(char *name)
239 struct sockaddr_un sock;
242 sock.sun_family = AF_UNIX;
243 snprintf(sock.sun_path, sizeof(sock.sun_path), "%s", name);
245 fd = socket(AF_UNIX, SOCK_STREAM, 0);
251 err = connect(fd, (struct sockaddr *) &sock, sizeof(sock));
265 void os_close_file(int fd)
270 int os_seek_file(int fd, __u64 offset)
274 actual = lseek64(fd, offset, SEEK_SET);
280 int os_read_file(int fd, void *buf, int len)
282 int n = read(fd, buf, len);
289 int os_write_file(int fd, const void *buf, int len)
291 int n = write(fd, (void *) buf, len);
298 int os_file_size(char *file, unsigned long long *size_out)
303 err = os_stat_file(file, &buf);
305 printk("Couldn't stat \"%s\" : err = %d\n", file, -err);
309 if(S_ISBLK(buf.ust_mode)){
313 fd = os_open_file(file, of_read(OPENFLAGS()), 0);
315 printk("Couldn't open \"%s\", errno = %d\n", file, -fd);
318 if(ioctl(fd, BLKGETSIZE, &blocks) < 0){
320 printk("Couldn't get the block size of \"%s\", "
321 "errno = %d\n", file, errno);
325 *size_out = ((long long) blocks) * 512;
329 *size_out = buf.ust_size;
333 int os_file_modtime(char *file, unsigned long *modtime)
338 err = os_stat_file(file, &buf);
340 printk("Couldn't stat \"%s\" : err = %d\n", file, -err);
344 *modtime = buf.ust_mtime;
348 int os_get_exec_close(int fd, int* close_on_exec)
353 ret = fcntl(fd, F_GETFD);
354 } while((ret < 0) && (errno == EINTR)) ;
359 *close_on_exec = (ret&FD_CLOEXEC) ? 1 : 0;
363 int os_set_exec_close(int fd, int close_on_exec)
367 if(close_on_exec) flag = FD_CLOEXEC;
371 err = fcntl(fd, F_SETFD, flag);
372 } while((err < 0) && (errno == EINTR)) ;
379 int os_pipe(int *fds, int stream, int close_on_exec)
381 int err, type = stream ? SOCK_STREAM : SOCK_DGRAM;
383 err = socketpair(AF_UNIX, type, 0, fds);
390 err = os_set_exec_close(fds[0], 1);
394 err = os_set_exec_close(fds[1], 1);
401 printk("os_pipe : Setting FD_CLOEXEC failed, err = %d\n", -err);
402 os_close_file(fds[1]);
403 os_close_file(fds[0]);
407 int os_set_fd_async(int fd, int owner)
411 /* XXX This should do F_GETFL first */
412 if(fcntl(fd, F_SETFL, O_ASYNC | O_NONBLOCK) < 0){
414 printk("os_set_fd_async : failed to set O_ASYNC and "
415 "O_NONBLOCK on fd # %d, errno = %d\n", fd, errno);
419 if(fcntl(fd, F_SETFD, 1) < 0){
420 printk("os_set_fd_async : Setting FD_CLOEXEC failed, "
421 "errno = %d\n", errno);
425 if((fcntl(fd, F_SETSIG, SIGIO) < 0) ||
426 (fcntl(fd, F_SETOWN, owner) < 0)){
428 printk("os_set_fd_async : Failed to fcntl F_SETOWN "
429 "(or F_SETSIG) fd %d to pid %d, errno = %d\n", fd,
437 int os_clear_fd_async(int fd)
439 int flags = fcntl(fd, F_GETFL);
441 flags &= ~(O_ASYNC | O_NONBLOCK);
442 if(fcntl(fd, F_SETFL, flags) < 0)
447 int os_set_fd_block(int fd, int blocking)
451 flags = fcntl(fd, F_GETFL);
453 if(blocking) flags &= ~O_NONBLOCK;
454 else flags |= O_NONBLOCK;
456 if(fcntl(fd, F_SETFL, flags) < 0)
462 int os_accept_connection(int fd)
466 new = accept(fd, NULL, 0);
484 int os_shutdown_socket(int fd, int r, int w)
488 if(r && w) what = SHUT_RDWR;
489 else if(r) what = SHUT_RD;
490 else if(w) what = SHUT_WR;
492 printk("os_shutdown_socket : neither r or w was set\n");
495 err = shutdown(fd, what);
501 int os_rcv_fd(int fd, int *helper_pid_out)
504 char buf[CMSG_SPACE(sizeof(new))];
506 struct cmsghdr *cmsg;
511 iov = ((struct iovec) { .iov_base = helper_pid_out,
512 .iov_len = sizeof(*helper_pid_out) });
515 msg.msg_control = buf;
516 msg.msg_controllen = sizeof(buf);
519 n = recvmsg(fd, &msg, 0);
523 else if(n != sizeof(iov.iov_len))
524 *helper_pid_out = -1;
526 cmsg = CMSG_FIRSTHDR(&msg);
528 printk("rcv_fd didn't receive anything, error = %d\n", errno);
531 if((cmsg->cmsg_level != SOL_SOCKET) ||
532 (cmsg->cmsg_type != SCM_RIGHTS)){
533 printk("rcv_fd didn't receive a descriptor\n");
537 new = ((int *) CMSG_DATA(cmsg))[0];
541 int os_create_unix_socket(char *file, int len, int close_on_exec)
543 struct sockaddr_un addr;
546 sock = socket(PF_UNIX, SOCK_DGRAM, 0);
551 err = os_set_exec_close(sock, 1);
553 printk("create_unix_socket : close_on_exec failed, "
557 addr.sun_family = AF_UNIX;
559 /* XXX Be more careful about overflow */
560 snprintf(addr.sun_path, len, "%s", file);
562 err = bind(sock, (struct sockaddr *) &addr, sizeof(addr));
569 void os_flush_stdout(void)
574 int os_lock_file(int fd, int excl)
576 int type = excl ? F_WRLCK : F_RDLCK;
577 struct flock lock = ((struct flock) { .l_type = type,
578 .l_whence = SEEK_SET,
583 err = fcntl(fd, F_SETLK, &lock);
588 err = fcntl(fd, F_GETLK, &lock);
594 printk("F_SETLK failed, file already locked by pid %d\n", lock.l_pid);