Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 680 insertions, 0 deletions

diff --git a/arch/um/os-Linux/file.c b/arch/um/os-Linux/file.c
new file mode 100644
index 0000000..77d4066
--- /dev/null
+++ b/arch/um/os-Linux/file.c
@@ -0,0 +1,680 @@
+/* 
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#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 <sys/mount.h>
+#include <sys/uio.h>
+#include "os.h"
+#include "user.h"
+#include "kern_util.h"
+
+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)
+{
+	int flags;
+
+	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);
+}
+
+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();
+
+	err = os_access(file, OS_ACC_W_OK);
+	if((err < 0) && (err != -EACCES))
+		return(err);
+
+	*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);
+}
+
+int os_open_file(char *file, struct openflags flags, int mode)
+{
+	int fd, f = 0;
+
+	if(flags.r && flags.w) f = O_RDWR;
+	else if(flags.r) f = O_RDONLY;
+	else if(flags.w) f = O_WRONLY;
+	else f = 0;
+
+	if(flags.s) f |= O_SYNC;
+	if(flags.c) f |= O_CREAT;
+	if(flags.t) f |= O_TRUNC;
+	if(flags.e) f |= O_EXCL;
+
+	fd = open64(file, f, mode);
+	if(fd < 0)
+		return(-errno);
+
+	if(flags.cl && fcntl(fd, F_SETFD, 1)){
+		os_close_file(fd);
+		return(-errno);
+	}
+
+	return(fd);
+}
+
+int os_connect_socket(char *name)
+{
+	struct sockaddr_un sock;
+	int fd, err;
+
+	sock.sun_family = AF_UNIX;
+	snprintf(sock.sun_path, sizeof(sock.sun_path), "%s", name);
+
+	fd = socket(AF_UNIX, SOCK_STREAM, 0);
+	if(fd < 0)
+		return(fd);
+
+	err = connect(fd, (struct sockaddr *) &sock, sizeof(sock));
+	if(err)
+		return(-errno);
+
+	return(fd);
+}
+
+void os_close_file(int fd)
+{
+	close(fd);
+}
+
+int os_seek_file(int fd, __u64 offset)
+{
+	__u64 actual;
+
+	actual = lseek64(fd, offset, SEEK_SET);
+	if(actual != offset)
+		return(-errno);
+	return(0);
+}
+
+static int fault_buffer(void *start, int len,
+			int (*copy_proc)(void *addr, void *buf, int len))
+{
+	int page = getpagesize(), i;
+	char c;
+
+	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);
+}
+
+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));
+
+	if(n < 0)
+		return(-errno);
+	return(n);
+}
+
+int os_read_file(int fd, void *buf, int len)
+{
+	return(file_io(fd, buf, len, (int (*)(int, void *, int)) read,
+		       copy_from_user_proc));
+}
+
+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 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);
+	}
+
+	if(S_ISBLK(buf.ust_mode)){
+		int fd, blocks;
+
+		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);
+			err = -errno;
+			os_close_file(fd);
+			return(err);
+		}
+		*size_out = ((long long) blocks) * 512;
+		os_close_file(fd);
+		return(0);
+	}
+	*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 < 0)
+		return(-errno);
+
+	if(!close_on_exec)
+		return(0);
+
+	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)
+{
+	/* XXX This should do F_GETFL first */
+	if(fcntl(fd, F_SETFL, O_ASYNC | O_NONBLOCK) < 0){
+		printk("os_set_fd_async : failed to set O_ASYNC and "
+		       "O_NONBLOCK on fd # %d, errno = %d\n", fd, errno);
+		return(-errno);
+	}
+#ifdef notdef
+	if(fcntl(fd, F_SETFD, 1) < 0){
+		printk("os_set_fd_async : Setting FD_CLOEXEC failed, "
+		       "errno = %d\n", errno);
+	}
+#endif
+
+	if((fcntl(fd, F_SETSIG, SIGIO) < 0) ||
+	   (fcntl(fd, F_SETOWN, owner) < 0)){
+		printk("os_set_fd_async : Failed to fcntl F_SETOWN "
+		       "(or F_SETSIG) fd %d to pid %d, errno = %d\n", fd, 
+		       owner, errno);
+		return(-errno);
+	}
+
+	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;
+
+	flags = fcntl(fd, F_GETFL);
+
+	if(blocking) flags &= ~O_NONBLOCK;
+	else flags |= O_NONBLOCK;
+
+	if(fcntl(fd, F_SETFL, flags) < 0){
+		printk("Failed to change blocking on fd # %d, errno = %d\n",
+		       fd, errno);
+		return(-errno);
+	}
+	return(0);
+}
+
+int os_accept_connection(int fd)
+{
+	int new;
+
+	new = accept(fd, NULL, 0);
+	if(new < 0) 
+		return(-errno);
+	return(new);
+}
+
+#ifndef SHUT_RD
+#define SHUT_RD 0
+#endif
+
+#ifndef SHUT_WR
+#define SHUT_WR 1
+#endif
+
+#ifndef SHUT_RDWR
+#define SHUT_RDWR 2
+#endif
+
+int os_shutdown_socket(int fd, int r, int w)
+{
+	int what, err;
+
+	if(r && w) what = SHUT_RDWR;
+	else if(r) what = SHUT_RD;
+	else if(w) what = SHUT_WR;
+	else {
+		printk("os_shutdown_socket : neither r or w was set\n");
+		return(-EINVAL);
+	}
+	err = shutdown(fd, what);
+	if(err < 0)
+		return(-errno);
+	return(0);
+}
+
+int os_rcv_fd(int fd, int *helper_pid_out)
+{
+	int new, n;
+	char buf[CMSG_SPACE(sizeof(new))];
+	struct msghdr msg;
+	struct cmsghdr *cmsg;
+	struct iovec iov;
+
+	msg.msg_name = NULL;
+	msg.msg_namelen = 0;
+	iov = ((struct iovec) { .iov_base  = helper_pid_out,
+				.iov_len   = sizeof(*helper_pid_out) });
+	msg.msg_iov = &iov;
+	msg.msg_iovlen = 1;
+	msg.msg_control = buf;
+	msg.msg_controllen = sizeof(buf);
+	msg.msg_flags = 0;
+
+	n = recvmsg(fd, &msg, 0);
+	if(n < 0)
+		return(-errno);
+
+	else if(n != sizeof(iov.iov_len))
+		*helper_pid_out = -1;
+
+	cmsg = CMSG_FIRSTHDR(&msg);
+	if(cmsg == NULL){
+		printk("rcv_fd didn't receive anything, error = %d\n", errno);
+		return(-1);
+	}
+	if((cmsg->cmsg_level != SOL_SOCKET) || 
+	   (cmsg->cmsg_type != SCM_RIGHTS)){
+		printk("rcv_fd didn't receive a descriptor\n");
+		return(-1);
+	}
+
+	new = ((int *) CMSG_DATA(cmsg))[0];
+	return(new);
+}
+
+int os_create_unix_socket(char *file, int len, int close_on_exec)
+{
+	struct sockaddr_un addr;
+	int sock, err;
+
+	sock = socket(PF_UNIX, SOCK_DGRAM, 0);
+	if (sock < 0){
+		printk("create_unix_socket - socket failed, errno = %d\n",
+		       errno);
+		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 */
+	snprintf(addr.sun_path, len, "%s", file);
+
+	err = bind(sock, (struct sockaddr *) &addr, sizeof(addr));
+	if (err < 0){
+		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
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */