#include <errno.h>
#include <fcntl.h>
#include <signal.h>
+#include <sys/types.h>
+#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/ioctl.h>
#include "user.h"
#include "kern_util.h"
-int os_file_type(char *file)
+static void copy_stat(struct uml_stat *dst, struct stat64 *src)
+{
+ *dst = ((struct uml_stat) {
+ .ust_dev = src->st_dev, /* device */
+ .ust_ino = src->st_ino, /* inode */
+ .ust_mode = src->st_mode, /* protection */
+ .ust_nlink = src->st_nlink, /* number of hard links */
+ .ust_uid = src->st_uid, /* user ID of owner */
+ .ust_gid = src->st_gid, /* group ID of owner */
+ .ust_size = src->st_size, /* total size, in bytes */
+ .ust_blksize = src->st_blksize, /* blocksize for filesys I/O */
+ .ust_blocks = src->st_blocks, /* number of blocks allocated */
+ .ust_atime = src->st_atime, /* time of last access */
+ .ust_mtime = src->st_mtime, /* time of last modification */
+ .ust_ctime = src->st_ctime, /* time of last change */
+ });
+}
+
+int os_stat_fd(const int fd, struct uml_stat *ubuf)
+{
+ struct stat64 sbuf;
+ int err;
+
+ do {
+ err = fstat64(fd, &sbuf);
+ } while((err < 0) && (errno == EINTR)) ;
+
+ if(err < 0)
+ return(-errno);
+
+ if(ubuf != NULL)
+ copy_stat(ubuf, &sbuf);
+ return(err);
+}
+
+int os_stat_file(const char *file_name, struct uml_stat *ubuf)
+{
+ struct stat64 sbuf;
+ int err;
+
+ do {
+ err = stat64(file_name, &sbuf);
+ } while((err < 0) && (errno == EINTR)) ;
+
+ if(err < 0)
+ return(-errno);
+
+ if(ubuf != NULL)
+ copy_stat(ubuf, &sbuf);
+ return(err);
+}
+
+int os_access(const char* file, int mode)
+{
+ int amode, err;
+
+ amode=(mode&OS_ACC_R_OK ? R_OK : 0) | (mode&OS_ACC_W_OK ? W_OK : 0) |
+ (mode&OS_ACC_X_OK ? X_OK : 0) | (mode&OS_ACC_F_OK ? F_OK : 0) ;
+
+ err = access(file, amode);
+ if(err < 0)
+ return(-errno);
+
+ return(0);
+}
+
+void os_print_error(int error, const char* str)
+{
+ errno = error < 0 ? -error : error;
+
+ perror(str);
+}
+
+/* FIXME? required only by hostaudio (because it passes ioctls verbatim) */
+int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg)
+{
+ int err;
+
+ err = ioctl(fd, cmd, arg);
+ if(err < 0)
+ return(-errno);
+
+ return(err);
+}
+
+int os_window_size(int fd, int *rows, int *cols)
+{
+ struct winsize size;
+
+ if(ioctl(fd, TIOCGWINSZ, &size) < 0)
+ return(-errno);
+
+ *rows = size.ws_row;
+ *cols = size.ws_col;
+
+ return(0);
+}
+
+int os_new_tty_pgrp(int fd, int pid)
+{
+ if(ioctl(fd, TIOCSCTTY, 0) < 0){
+ printk("TIOCSCTTY failed, errno = %d\n", errno);
+ return(-errno);
+ }
+
+ if(tcsetpgrp(fd, pid) < 0){
+ printk("tcsetpgrp failed, errno = %d\n", errno);
+ return(-errno);
+ }
+
+ return(0);
+}
+
+/* FIXME: ensure namebuf in os_get_if_name is big enough */
+int os_get_ifname(int fd, char* namebuf)
+{
+ if(ioctl(fd, SIOCGIFNAME, namebuf) < 0)
+ return(-errno);
+
+ return(0);
+}
+
+int os_set_slip(int fd)
+{
+ int disc, sencap;
+
+ disc = N_SLIP;
+ if(ioctl(fd, TIOCSETD, &disc) < 0){
+ printk("Failed to set slip line discipline - "
+ "errno = %d\n", errno);
+ return(-errno);
+ }
+
+ sencap = 0;
+ if(ioctl(fd, SIOCSIFENCAP, &sencap) < 0){
+ printk("Failed to set slip encapsulation - "
+ "errno = %d\n", errno);
+ return(-errno);
+ }
+
+ return(0);
+}
+
+int os_set_owner(int fd, int pid)
+{
+ if(fcntl(fd, F_SETOWN, pid) < 0){
+ int save_errno = errno;
+
+ if(fcntl(fd, F_GETOWN, 0) != pid)
+ return(-save_errno);
+ }
+
+ return(0);
+}
+
+/* FIXME? moved wholesale from sigio_user.c to get fcntls out of that file */
+int os_sigio_async(int master, int slave)
{
- struct stat64 buf;
+ int flags;
- if(stat64(file, &buf) == -1)
+ flags = fcntl(master, F_GETFL);
+ if(flags < 0) {
+ printk("fcntl F_GETFL failed, errno = %d\n", errno);
return(-errno);
+ }
+
+ if((fcntl(master, F_SETFL, flags | O_NONBLOCK | O_ASYNC) < 0) ||
+ (fcntl(master, F_SETOWN, os_getpid()) < 0)){
+ printk("fcntl F_SETFL or F_SETOWN failed, errno = %d\n",
+ errno);
+ return(-errno);
+ }
+
+ if((fcntl(slave, F_SETFL, flags | O_NONBLOCK) < 0)){
+ printk("fcntl F_SETFL failed, errno = %d\n", errno);
+ return(-errno);
+ }
+
+ return(0);
+}
- if(S_ISDIR(buf.st_mode)) return(OS_TYPE_DIR);
- else if(S_ISLNK(buf.st_mode)) return(OS_TYPE_SYMLINK);
- else if(S_ISCHR(buf.st_mode)) return(OS_TYPE_CHARDEV);
- else if(S_ISBLK(buf.st_mode)) return(OS_TYPE_BLOCKDEV);
- else if(S_ISFIFO(buf.st_mode)) return(OS_TYPE_FIFO);
- else if(S_ISSOCK(buf.st_mode)) return(OS_TYPE_SOCK);
+int os_mode_fd(int fd, int mode)
+{
+ int err;
+
+ do {
+ err = fchmod(fd, mode);
+ } while((err < 0) && (errno==EINTR)) ;
+
+ if(err < 0)
+ return(-errno);
+
+ return(0);
+}
+
+int os_file_type(char *file)
+{
+ struct uml_stat buf;
+ int err;
+
+ err = os_stat_file(file, &buf);
+ if(err < 0)
+ return(err);
+
+ if(S_ISDIR(buf.ust_mode)) return(OS_TYPE_DIR);
+ else if(S_ISLNK(buf.ust_mode)) return(OS_TYPE_SYMLINK);
+ else if(S_ISCHR(buf.ust_mode)) return(OS_TYPE_CHARDEV);
+ else if(S_ISBLK(buf.ust_mode)) return(OS_TYPE_BLOCKDEV);
+ else if(S_ISFIFO(buf.ust_mode)) return(OS_TYPE_FIFO);
+ else if(S_ISSOCK(buf.ust_mode)) return(OS_TYPE_SOCK);
else return(OS_TYPE_FILE);
}
int os_file_mode(char *file, struct openflags *mode_out)
{
+ int err;
+
*mode_out = OPENFLAGS();
- if(!access(file, W_OK)) *mode_out = of_write(*mode_out);
- else if(errno != EACCES)
- return(-errno);
+ err = os_access(file, OS_ACC_W_OK);
+ if((err < 0) && (err != -EACCES))
+ return(err);
- if(!access(file, R_OK)) *mode_out = of_read(*mode_out);
- else if(errno != EACCES)
- return(-errno);
+ *mode_out = of_write(*mode_out);
+
+ err = os_access(file, OS_ACC_R_OK);
+ if((err < 0) && (err != -EACCES))
+ return(err);
+
+ *mode_out = of_read(*mode_out);
return(0);
}
if(flags.e) f |= O_EXCL;
fd = open64(file, f, mode);
- if(fd < 0) return(-errno);
-
- if(flags.cl){
- if(fcntl(fd, F_SETFD, 1)){
- close(fd);
- return(-errno);
- }
+ if(fd < 0)
+ return(-errno);
+
+ if(flags.cl && fcntl(fd, F_SETFD, 1)){
+ os_close_file(fd);
+ return(-errno);
}
- return(fd);
return(fd);
}
err = connect(fd, (struct sockaddr *) &sock, sizeof(sock));
if(err)
- return(err);
+ return(-errno);
return(fd);
}
return(0);
}
-int os_read_file(int fd, void *buf, int len)
+static int fault_buffer(void *start, int len,
+ int (*copy_proc)(void *addr, void *buf, int len))
{
- int n;
+ int page = getpagesize(), i;
+ char c;
- /* Force buf into memory if it's not already. */
+ for(i = 0; i < len; i += page){
+ if((*copy_proc)(start + i, &c, sizeof(c)))
+ return(-EFAULT);
+ }
+ if((len % page) != 0){
+ if((*copy_proc)(start + len - 1, &c, sizeof(c)))
+ return(-EFAULT);
+ }
+ return(0);
+}
- /* XXX This fails if buf is kernel memory */
-#ifdef notdef
- if(copy_to_user_proc(buf, &c, sizeof(c)))
- return(-EFAULT);
-#endif
+static int file_io(int fd, void *buf, int len,
+ int (*io_proc)(int fd, void *buf, int len),
+ int (*copy_user_proc)(void *addr, void *buf, int len))
+{
+ int n, err;
+
+ do {
+ n = (*io_proc)(fd, buf, len);
+ if((n < 0) && (errno == EFAULT)){
+ err = fault_buffer(buf, len, copy_user_proc);
+ if(err)
+ return(err);
+ n = (*io_proc)(fd, buf, len);
+ }
+ } while((n < 0) && (errno == EINTR));
- n = read(fd, buf, len);
if(n < 0)
return(-errno);
return(n);
}
-int os_write_file(int fd, void *buf, int count)
+int os_read_file(int fd, void *buf, int len)
{
- int n;
-
- /* Force buf into memory if it's not already. */
-
- /* XXX This fails if buf is kernel memory */
-#ifdef notdef
- if(copy_to_user_proc(buf, buf, buf[0]))
- return(-EFAULT);
-#endif
+ return(file_io(fd, buf, len, (int (*)(int, void *, int)) read,
+ copy_from_user_proc));
+}
- n = write(fd, buf, count);
- if(n < 0)
- return(-errno);
- return(n);
+int os_write_file(int fd, const void *buf, int len)
+{
+ return(file_io(fd, (void *) buf, len,
+ (int (*)(int, void *, int)) write, copy_to_user_proc));
}
int os_file_size(char *file, long long *size_out)
{
- struct stat64 buf;
+ struct uml_stat buf;
+ int err;
- if(stat64(file, &buf) == -1){
- printk("Couldn't stat \"%s\" : errno = %d\n", file, errno);
- return(-errno);
+ err = os_stat_file(file, &buf);
+ if(err < 0){
+ printk("Couldn't stat \"%s\" : err = %d\n", file, -err);
+ return(err);
}
- if(S_ISBLK(buf.st_mode)){
+
+ if(S_ISBLK(buf.ust_mode)){
int fd, blocks;
- if((fd = open64(file, O_RDONLY)) < 0){
- printk("Couldn't open \"%s\", errno = %d\n", file,
- errno);
- return(-errno);
+ fd = os_open_file(file, of_read(OPENFLAGS()), 0);
+ if(fd < 0){
+ printk("Couldn't open \"%s\", errno = %d\n", file, -fd);
+ return(fd);
}
if(ioctl(fd, BLKGETSIZE, &blocks) < 0){
printk("Couldn't get the block size of \"%s\", "
"errno = %d\n", file, errno);
- close(fd);
- return(-errno);
+ err = -errno;
+ os_close_file(fd);
+ return(err);
}
*size_out = ((long long) blocks) * 512;
- close(fd);
+ os_close_file(fd);
return(0);
}
- *size_out = buf.st_size;
+ *size_out = buf.ust_size;
+ return(0);
+}
+
+int os_file_modtime(char *file, unsigned long *modtime)
+{
+ struct uml_stat buf;
+ int err;
+
+ err = os_stat_file(file, &buf);
+ if(err < 0){
+ printk("Couldn't stat \"%s\" : err = %d\n", file, -err);
+ return(err);
+ }
+
+ *modtime = buf.ust_mtime;
return(0);
}
+int os_get_exec_close(int fd, int* close_on_exec)
+{
+ int ret;
+
+ do {
+ ret = fcntl(fd, F_GETFD);
+ } while((ret < 0) && (errno == EINTR)) ;
+
+ if(ret < 0)
+ return(-errno);
+
+ *close_on_exec = (ret&FD_CLOEXEC) ? 1 : 0;
+ return(ret);
+}
+
+int os_set_exec_close(int fd, int close_on_exec)
+{
+ int flag, err;
+
+ if(close_on_exec) flag = FD_CLOEXEC;
+ else flag = 0;
+
+ do {
+ err = fcntl(fd, F_SETFD, flag);
+ } while((err < 0) && (errno == EINTR)) ;
+
+ if(err < 0)
+ return(-errno);
+ return(err);
+}
+
int os_pipe(int *fds, int stream, int close_on_exec)
{
int err, type = stream ? SOCK_STREAM : SOCK_DGRAM;
err = socketpair(AF_UNIX, type, 0, fds);
- if(err)
+ if(err < 0)
return(-errno);
if(!close_on_exec)
return(0);
- if((fcntl(fds[0], F_SETFD, 1) < 0) || (fcntl(fds[1], F_SETFD, 1) < 0))
- printk("os_pipe : Setting FD_CLOEXEC failed, errno = %d",
- errno);
+ err = os_set_exec_close(fds[0], 1);
+ if(err < 0)
+ goto error;
+
+ err = os_set_exec_close(fds[1], 1);
+ if(err < 0)
+ goto error;
return(0);
+
+ error:
+ printk("os_pipe : Setting FD_CLOEXEC failed, err = %d\n", -err);
+ os_close_file(fds[1]);
+ os_close_file(fds[0]);
+ return(err);
}
int os_set_fd_async(int fd, int owner)
return(0);
}
+int os_clear_fd_async(int fd)
+{
+ int flags = fcntl(fd, F_GETFL);
+
+ flags &= ~(O_ASYNC | O_NONBLOCK);
+ if(fcntl(fd, F_SETFL, flags) < 0)
+ return(-errno);
+ return(0);
+}
+
int os_set_fd_block(int fd, int blocking)
{
int flags;
return(-EINVAL);
}
err = shutdown(fd, what);
- if(err)
+ if(err < 0)
return(-errno);
return(0);
}
return(new);
}
-int create_unix_socket(char *file, int len)
+int os_create_unix_socket(char *file, int len, int close_on_exec)
{
struct sockaddr_un addr;
int sock, err;
return(-errno);
}
+ if(close_on_exec) {
+ err = os_set_exec_close(sock, 1);
+ if(err < 0)
+ printk("create_unix_socket : close_on_exec failed, "
+ "err = %d", -err);
+ }
+
addr.sun_family = AF_UNIX;
/* XXX Be more careful about overflow */
err = bind(sock, (struct sockaddr *) &addr, sizeof(addr));
if (err < 0){
- printk("create_listening_socket - bind failed, errno = %d\n",
- errno);
+ printk("create_listening_socket at '%s' - bind failed, "
+ "errno = %d\n", file, errno);
return(-errno);
}
return(sock);
}
+void os_flush_stdout(void)
+{
+ fflush(stdout);
+}
+
+int os_lock_file(int fd, int excl)
+{
+ int type = excl ? F_WRLCK : F_RDLCK;
+ struct flock lock = ((struct flock) { .l_type = type,
+ .l_whence = SEEK_SET,
+ .l_start = 0,
+ .l_len = 0 } );
+ int err, save;
+
+ err = fcntl(fd, F_SETLK, &lock);
+ if(!err)
+ goto out;
+
+ save = -errno;
+ err = fcntl(fd, F_GETLK, &lock);
+ if(err){
+ err = -errno;
+ goto out;
+ }
+
+ printk("F_SETLK failed, file already locked by pid %d\n", lock.l_pid);
+ err = save;
+ out:
+ return(err);
+}
+
/*
* Overrides for Emacs so that we follow Linus's tabbing style.
* Emacs will notice this stuff at the end of the file and automatically
git://git.onelab.eu / linux-2.6.git / blobdiff