patch-1.3.44 linux/arch/sparc/kernel/sys_sunos.c

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diff -u --recursive --new-file v1.3.43/linux/arch/sparc/kernel/sys_sunos.c linux/arch/sparc/kernel/sys_sunos.c
@@ -0,0 +1,801 @@
+/* $Id: sys_sunos.c,v 1.20 1995/11/25 00:58:37 davem Exp $
+ * sys_sunos.c: SunOS specific syscall compatability support.
+ *
+ * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 1995 Miguel de Icaza (miguel@nuclecu.unam.mx)
+ *
+ * Based upon preliminary work which is:
+ *
+ * Copyright (C) 1995 Adrian M. Rodriguez (adrian@remus.rutgers.edu)
+ */
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <linux/mman.h>
+#include <linux/errno.h>
+#include <linux/mm.h>
+#include <linux/fs.h>
+#include <linux/resource.h>
+#include <linux/signal.h>
+#include <linux/uio.h>
+#include <linux/utsname.h>
+#include <linux/fs.h>
+#include <linux/major.h>
+
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/pconf.h>
+
+/* For the nfs mount emulation */
+#include <linux/socket.h>
+#include <linux/in.h>
+#include <linux/nfs.h>
+#include <linux/nfs_mount.h>
+
+/* for sunos_select */
+#include <linux/time.h>
+#include <linux/personality.h>
+
+static unsigned long get_sparc_unmapped_area(unsigned long len)
+{
+	unsigned long addr;
+	struct vm_area_struct * vmm;
+
+	if (len > TASK_SIZE)
+		return 0;
+	addr = 0xE8000000UL;    /* To make it work on a sun4c. */
+	for (vmm = current->mm->mmap; ; vmm = vmm->vm_next) {
+		if (TASK_SIZE - len < addr)
+			return 0;
+		if (!vmm)
+			return addr;
+		if (addr > vmm->vm_end)
+			continue;
+		if (addr + len > vmm->vm_start) {
+			addr = vmm->vm_end;
+			continue;
+		}
+		return addr;
+	}
+}
+
+/* We use the SunOS mmap() semantics. */
+asmlinkage unsigned long sunos_mmap(unsigned long addr, unsigned long len,
+				    unsigned long prot, unsigned long flags,
+				    unsigned long fd, unsigned long off)
+{
+	struct file * file = NULL;
+	unsigned long retval, ret_type;
+
+	if(flags & MAP_NORESERVE) {
+		printk("%s: unimplemented SunOS MAP_NORESERVE mmap() flag\n",
+		       current->comm);
+		flags &= ~MAP_NORESERVE;
+	}
+	if(!(flags & MAP_ANONYMOUS))
+		if (fd >= NR_OPEN || !(file = current->files->fd[fd]))
+			return -EBADF;
+	if(!(flags & MAP_FIXED) && !addr) {
+		addr = get_sparc_unmapped_area(len);
+		if(!addr)
+			return -ENOMEM;
+	}
+	/* If this is ld.so or a shared library doing an mmap
+	 * of /dev/zero, transform it into an anonymous mapping.
+	 * SunOS is so stupid some times... hmph!
+	 */
+	if(MAJOR(file->f_inode->i_rdev) == MEM_MAJOR &&
+	   MINOR(file->f_inode->i_rdev) == 5) {
+		flags |= MAP_ANONYMOUS;
+		file = 0;
+	}
+	ret_type = flags & _MAP_NEW;
+	flags &= ~_MAP_NEW;
+	retval = do_mmap(file, addr, len, prot, flags, off);
+	if(ret_type)
+		return retval;
+	else
+		return ((retval < KERNBASE) ? 0 : retval);
+}
+
+/* Weird SunOS mm control function.. */
+asmlinkage int sunos_mctl(unsigned long addr, unsigned long len, int function, char *arg)
+{
+	printk("%s: Call to sunos_mctl(addr<%08lx>, len<%08lx>, function<%d>, arg<%p>) "
+	       "is unsupported\n", current->comm, addr, len, function, arg);
+	return -EAGAIN;
+}
+
+/* XXX This won't be necessary when I sync up to never kernel in 1.3.x series
+ * XXX which has the sys_msync() system call implemented properly.
+ */
+asmlinkage int sunos_msync(unsigned long addr, unsigned long len, unsigned long flags)
+{
+	printk("%s: Call to sunos_msync(addr<%08lx>, len<%08lx>, flags<%08lx>) "
+	       "is unsupported\n", current->comm, addr, len, flags);
+	return -EINVAL;
+}
+
+/* SunOS is completely broken... it returns 0 on success, otherwise
+ * ENOMEM.  For sys_sbrk() it wants the new brk value as a return
+ * on success and ENOMEM as before on failure.
+ */
+asmlinkage int sunos_brk(unsigned long brk)
+{
+	int freepages;
+	unsigned long rlim;
+	unsigned long newbrk, oldbrk;
+
+	if (brk < current->mm->end_code)
+		return -ENOMEM;
+
+	newbrk = PAGE_ALIGN(brk);
+	oldbrk = PAGE_ALIGN(current->mm->brk);
+	if (oldbrk == newbrk) {
+		current->mm->brk = brk;
+		return 0;
+	}
+
+	/*
+	 * Always allow shrinking brk
+	 */
+	if (brk <= current->mm->brk) {
+		current->mm->brk = brk;
+		do_munmap(newbrk, oldbrk-newbrk);
+		return 0;
+	}
+	/*
+	 * Check against rlimit and stack..
+	 */
+	rlim = current->rlim[RLIMIT_DATA].rlim_cur;
+	if (rlim >= RLIM_INFINITY)
+		rlim = ~0;
+	if (brk - current->mm->end_code > rlim)
+		return -ENOMEM;
+
+	/*
+	 * Check against existing mmap mappings.
+	 */
+	if (find_vma_intersection(current, oldbrk, newbrk+PAGE_SIZE))
+		return -ENOMEM;
+
+	/*
+	 * stupid algorithm to decide if we have enough memory: while
+	 * simple, it hopefully works in most obvious cases.. Easy to
+	 * fool it, but this should catch most mistakes.
+	 */
+	freepages = buffermem >> 12;
+	freepages += nr_free_pages;
+	freepages += nr_swap_pages;
+	freepages -= MAP_NR(high_memory) >> 4;
+	freepages -= (newbrk-oldbrk) >> 12;
+	if (freepages < 0)
+		return -ENOMEM;
+	/*
+	 * Ok, we have probably got enough memory - let it rip.
+	 */
+	current->mm->brk = brk;
+	do_mmap(NULL, oldbrk, newbrk-oldbrk,
+		PROT_READ|PROT_WRITE|PROT_EXEC,
+		MAP_FIXED|MAP_PRIVATE, 0);
+	return 0;
+}
+
+asmlinkage unsigned long sunos_sbrk(int increment)
+{
+	int error;
+
+	/* This should do it hopefully... */
+	error = sunos_brk(((int) current->mm->brk) + increment);
+	if(error == 0)
+		return current->mm->brk;
+	else
+		return error;
+}
+
+/* XXX Completely undocumented, and completely magic...
+ * XXX I belive it is to increase the size of the stack by
+ * XXX argument 'increment' and return the new end of stack
+ * XXX area.  Wheee...
+ */
+asmlinkage unsigned long sunos_sstk(int increment)
+{
+	printk("%s: Call to sunos_sstk(increment<%d>) is unsupported\n",
+	       current->comm, increment);
+	return -1;
+}
+
+/* Give hints to the kernel as to what paging strategy to use...
+ * Completely bogus, don't remind me.
+ */
+#define VA_NORMAL     0 /* Normal vm usage expected */
+#define VA_ABNORMAL   1 /* Abnormal/random vm usage probable */
+#define VA_SEQUENTIAL 2 /* Accesses will be of a sequential nature */
+#define VA_INVALIDATE 3 /* Page table entries should be flushed ??? */
+static char *vstrings[] = {
+	"VA_NORMAL",
+	"VA_ABNORMAL",
+	"VA_SEQUENTIAL",
+	"VA_INVALIDATE",
+};
+
+asmlinkage void sunos_vadvise(unsigned long strategy)
+{
+	/* I wanna see who uses this... */
+	printk("%s: Advises us to use %s paging strategy\n",
+	       current->comm,
+	       strategy <= 3 ? vstrings[strategy] : "BOGUS");
+	return; /* We don't do diddly... */
+}
+
+/* Same as vadvise, and just as bogus, but for a range of virtual
+ * process address space.
+ */
+#define MADV_NORMAL      0 /* Nothing special... */
+#define MADV_RANDOM      1 /* I am emacs... */
+#define MADV_SEQUENTIAL  2 /* I am researcher code... */
+#define MADV_WILLNEED    3 /* Pages in this range will be needed */
+#define MADV_DONTNEED    4 /* Pages in this range won't be needed */
+
+static char *mstrings[] = {
+	"MADV_NORMAL",
+	"MADV_RANDOM",
+	"MADV_SEQUENTIAL",
+	"MADV_WILLNEED",
+	"MADV_DONTNEED",
+};
+
+asmlinkage void sunos_madvise(unsigned long address, unsigned long len,
+			      unsigned long strategy)
+{
+	/* I wanna see who uses this... */
+	printk("%s: Advises us to use %s paging strategy for addr<%08lx> len<%08lx>\n",
+	       current->comm,
+	       strategy <= 4 ? mstrings[strategy] : "BOGUS",
+	       address, len);
+	return; /* We don't do diddly... */
+}
+
+/* Places into character array, the status of all the pages in the passed
+ * range from 'addr' to 'addr + len'.  -1 on failure, 0 on success...
+ * The encoding in each character is:
+ * low-bit is zero == Page is not in physical ram right now
+ * low-bit is one  == Page is currently residing in core
+ * All other bits are undefined within the character so there...
+ * Also, if you try to get stats on an area outside of the user vm area
+ * *or* the passed base address is not aligned on a page boundry you
+ * get an error.
+ */
+asmlinkage int sunos_mincore(unsigned long addr, unsigned long len, char *array)
+{
+	pgd_t *pgdp;
+	pmd_t *pmdp;
+	pte_t *ptep;
+	unsigned long limit;
+	int num_pages, pnum;
+
+	if(addr & (PAGE_SIZE - 1))
+		return -EINVAL;
+
+	num_pages = (len / PAGE_SIZE);
+	if(verify_area(VERIFY_WRITE, array, num_pages))
+		return -EFAULT; /* bum array, you lose... */
+	if((addr >= KERNBASE) || ((addr + len) > KERNBASE))
+		return -ENOMEM; /* I'm sure you're curious about kernel mappings.. */
+
+	/* Wheee, go through pte's */
+	pnum = 0;
+	for(limit = addr + len; addr < limit; addr += PAGE_SIZE, pnum++) {
+		pgdp = pgd_offset(current->mm, addr);
+		if(pgd_none(*pgdp))
+			return -ENOMEM; /* As per SunOS manpage */
+		pmdp = pmd_offset(pgdp, addr);
+		if(pmd_none(*pmdp))
+			return -ENOMEM; /* As per SunOS manpage */
+		ptep = pte_offset(pmdp, addr);
+		if(pte_none(*ptep))
+			return -ENOMEM; /* As per SunOS manpage */
+		/* Page in core or Swapped page? */
+		array[pnum] = pte_present(*ptep) ? 1 : 0;
+	}
+	return 0; /* Success... I think... */
+}
+
+/* This just wants the soft limit (ie. rlim_cur element) of the RLIMIT_NOFILE
+ * resource limit and is for backwards compatability with older sunos
+ * revs.
+ */
+asmlinkage long sunos_getdtablesize(void)
+{
+	return NR_OPEN;
+}
+#define _S(nr) (1<<((nr)-1))
+
+#define _BLOCKABLE (~(_S(SIGKILL) | _S(SIGSTOP)))
+
+asmlinkage unsigned long sunos_sigblock(unsigned long blk_mask)
+{
+	unsigned long old = current->blocked;
+
+	current->blocked |= (blk_mask & _BLOCKABLE);
+	return old;
+}
+
+/* SunOS getdents is very similar to the newer Linux (iBCS2 compliant)    */
+/* getdents system call, the format of the structure just has a different */
+/* layout (d_off+d_ino instead of d_ino+d_off) */
+struct sunos_dirent {
+    long           d_off;
+    unsigned long  d_ino;
+    unsigned short d_reclen;
+    unsigned short d_namlen;
+    char           d_name[1];
+};
+
+struct sunos_dirent_callback {
+    struct sunos_dirent *curr;
+    struct sunos_dirent *previous;
+    int count;
+    int error;
+};
+
+#define NAME_OFFSET(de) ((int) ((de)->d_name - (char *) (de)))
+#define ROUND_UP(x) (((x)+sizeof(long)-1) & ~(sizeof(long)-1))
+
+static int sunos_filldir(void * __buf, const char * name, int namlen,
+			 off_t offset, ino_t ino)
+{
+	struct sunos_dirent * dirent;
+	struct sunos_dirent_callback * buf = (struct sunos_dirent_callback *) __buf;
+	int reclen = ROUND_UP(NAME_OFFSET(dirent) + namlen + 1);
+
+	buf->error = -EINVAL;	/* only used if we fail.. */
+	if (reclen > buf->count)
+		return -EINVAL;
+	dirent = buf->previous;
+	if (dirent)
+		put_user(offset, &dirent->d_off);
+	dirent = buf->curr;
+	buf->previous = dirent;
+	put_user(ino, &dirent->d_ino);
+	put_user((strlen(name)), &dirent->d_namlen);
+	put_user(reclen, &dirent->d_reclen);
+	memcpy_tofs(dirent->d_name, name, namlen);
+	put_user(0, dirent->d_name + namlen);
+	((char *) dirent) += reclen;
+	buf->curr = dirent;
+	buf->count -= reclen;
+	return 0;
+}
+
+asmlinkage int sunos_getdents(unsigned int fd, void * dirent, int cnt)
+{
+	struct file * file;
+	struct sunos_dirent * lastdirent;
+	struct sunos_dirent_callback buf;
+	int error;
+
+	if (fd >= NR_OPEN || !(file = current->files->fd[fd]))
+		return -EBADF;
+	if (!file->f_op || !file->f_op->readdir)
+		return -ENOTDIR;
+	if(verify_area(VERIFY_WRITE, dirent, cnt))
+		return -EFAULT;
+	if(cnt < (sizeof(struct sunos_dirent) + 255))
+		return -EINVAL;
+
+	buf.curr = (struct sunos_dirent *) dirent;
+	buf.previous = NULL;
+	buf.count = cnt;
+	buf.error = 0;
+	error = file->f_op->readdir(file->f_inode, file, &buf, sunos_filldir);
+	if (error < 0)
+		return error;
+	lastdirent = buf.previous;
+	if (!lastdirent)
+		return buf.error;
+	put_user(file->f_pos, &lastdirent->d_off);
+	return cnt - buf.count;
+}
+
+asmlinkage int sunos_getdomainname(char *name, int len)
+{
+	int error;
+
+	if(len > __NEW_UTS_LEN)
+		return -EFAULT;
+	error = verify_area(VERIFY_WRITE, name, len);
+	if(error)
+		return -EFAULT;
+	memcpy_tofs(name, system_utsname.domainname, len);
+	return 0;
+}
+
+struct sunos_utsname {
+	char sname[9];
+	char nname[9];
+	char nnext[56];
+	char rel[9];
+	char ver[9];
+	char mach[9];
+};
+
+asmlinkage int sunos_uname(struct sunos_utsname *name)
+{
+	int error;
+	if(!name)
+		return -EFAULT;
+	error = verify_area(VERIFY_WRITE, name, sizeof *name);
+	if(error)
+		return error;
+	memcpy_tofs(&name->sname[0], &system_utsname.sysname[0],
+		    sizeof(name->sname));
+	memcpy_tofs(&name->nname[0], &system_utsname.nodename[0],
+		    sizeof(name->nname));
+	name->nname[8] = '\0';
+	memcpy_tofs(&name->nnext[0], &system_utsname.nodename[9],
+		    sizeof(name->nnext));
+	memcpy_tofs(&name->rel[0], &system_utsname.release[0],
+		    sizeof(name->rel));
+	memcpy_tofs(&name->ver[0], &system_utsname.version[0],
+		    sizeof(name->ver));
+	memcpy_tofs(&name->mach[0], &system_utsname.machine[0],
+		    sizeof(name->mach));
+	return 0;
+}
+
+asmlinkage int sunos_nosys(void)
+{
+	struct pt_regs *regs;
+
+	regs = (struct pt_regs *) (((current->tss.ksp) & PAGE_MASK) +
+				   (PAGE_SIZE - TRACEREG_SZ));
+	current->tss.sig_address = regs->pc;
+	current->tss.sig_desc = regs->u_regs[UREG_G1];
+	send_sig(SIGSYS, current, 1);
+	printk("Process makes ni_syscall number %d, register dump:\n",
+	       (int) regs->u_regs[UREG_G1]);
+	show_regs(regs);
+	return -ENOSYS;
+}
+
+/* This is not a real and complete implementation yet, just to keep
+ * the easy SunOS binaries happy.
+ */
+asmlinkage int sunos_fpathconf(int fd, int name)
+{
+	switch(name) {
+	case _PCONF_LINK:
+		return LINK_MAX;
+	case _PCONF_CANON:
+		return MAX_CANON;
+	case _PCONF_INPUT:
+		return MAX_INPUT;
+	case _PCONF_NAME:
+		return NAME_MAX;
+	case _PCONF_PATH:
+		return PATH_MAX;
+	case _PCONF_PIPE:
+		return PIPE_BUF;
+	case _PCONF_CHRESTRICT:
+		return 1; /* XXX Investigate XXX */
+	case _PCONF_NOTRUNC:
+		return 0; /* XXX Investigate XXX */
+	case _PCONF_VDISABLE:
+		return 30; /* XXX Investigate XXX */
+	default:
+		return -EINVAL;
+	}
+}
+
+asmlinkage int sunos_pathconf(char *path, int name)
+{
+	return sunos_fpathconf(0, name); /* XXX cheese XXX */
+}
+
+/* SunOS mount system call emulation */
+extern asmlinkage int
+sys_select(int n, fd_set *inp, fd_set *outp, fd_set *exp, struct timeval *tvp);
+
+asmlinkage int sunos_select(int width, fd_set *inp, fd_set *outp, fd_set *exp, struct timeval *tvp)
+{
+    /* SunOS binaries expect that select won't change the tvp contents */
+    current->personality |= STICKY_TIMEOUTS;
+    return sys_select (width, inp, outp, exp, tvp);
+}
+
+asmlinkage void sunos_nop(void)
+{
+	return;
+}
+
+/* SunOS mount/umount. */
+#define SMNT_RDONLY       1
+#define SMNT_NOSUID       2
+#define SMNT_NEWTYPE      4
+#define SMNT_GRPID        8
+#define SMNT_REMOUNT      16
+#define SMNT_NOSUB        32
+#define SMNT_MULTI        64
+#define SMNT_SYS5         128
+
+struct ufs_mntargs {
+	char *dev_name;
+};
+
+struct lo_mntargs {
+	char *dev_name;
+};
+
+struct ext2_mntargs {
+	char *dev_name;
+};
+
+struct iso9660_mntargs {
+	char *dev_name;
+};
+
+struct minix_mntargs {
+	char *dev_name;
+};
+
+struct ext_mntargs {
+	char *dev_name;
+};
+
+struct msdos_mntargs {
+	char *dev_name;
+};
+
+struct xiafs_mntargs {
+	char *dev_name;
+};
+
+struct sunos_fh_t {
+	char fh_data [NFS_FHSIZE];
+};
+
+struct sunos_nfs_mount_args {
+	struct sockaddr_in  *addr; /* file server address */
+	struct nfs_fh *fh;     /* File handle to be mounted */
+	int        flags;      /* flags */
+	int        wsize;      /* write size in bytes */
+	int        rsize;      /* read size in bytes */
+	int        timeo;      /* initial timeout in .1 secs */
+	int        retrans;    /* times to retry send */
+	char       *hostname;  /* server's hostname */
+	int        acregmin;   /* attr cache file min secs */
+	int        acregmax;   /* attr cache file max secs */
+	int        acdirmin;   /* attr cache dir min secs */
+	int        acdirmax;   /* attr cache dir max secs */
+	char       *netname;   /* server's netname */
+};
+
+extern asmlinkage int sys_mount(char *, char *, char *, unsigned long, void *);
+
+extern int do_mount(dev_t, const char *, char *, int, void *);
+extern dev_t get_unnamed_dev(void);
+extern void put_unnamed_dev(dev_t);
+
+extern sys_mount (char * dev_name, char * dir_name, char * type,
+		  unsigned long new_flags, void * data);
+
+extern asmlinkage int
+sys_connect(int fd, struct sockaddr *uservaddr, int addrlen);
+
+extern asmlinkage int
+sys_socket(int family, int type, int protocol);
+
+asmlinkage int
+sys_bind(int fd, struct sockaddr *umyaddr, int addrlen);
+
+
+/* Bind the socket on a local reserved port and connect it to the
+ * remote server.  This on Linux/i386 is done by the mount program,
+ * not by the kernel. 
+ */
+static int
+sunos_nfs_get_server_fd (int fd, struct sockaddr_in *addr)
+{
+	struct sockaddr_in local;
+	struct sockaddr_in server;
+	int    try_port;
+	int    ret;
+	struct socket *socket;
+	struct inode  *inode;
+	struct file   *file;
+
+	file = current->files->fd [fd];
+	inode = file->f_inode;
+	if (!inode || !inode->i_sock)
+		return 0;
+
+	socket = &inode->u.socket_i;
+	local.sin_family = AF_INET;
+	local.sin_addr.s_addr = INADDR_ANY;
+
+	/* IPPORT_RESERVED = 1024, can't find the definition in the kernel */
+	try_port = 1024;
+	do {
+		local.sin_port = htons (--try_port);
+		ret = socket->ops->bind(socket, (struct sockaddr*)&local,
+					sizeof(local));
+	} while (ret && try_port > (1024 / 2));
+
+	if (ret)
+		return 0;
+
+	server.sin_family = AF_INET;
+	server.sin_addr = addr->sin_addr;
+	server.sin_port = NFS_PORT;
+
+	/* Call sys_connect */
+	ret = socket->ops->connect (socket, (struct sockaddr *) &server,
+				    sizeof (server), file->f_flags);
+	if (ret < 0)
+		return 0;
+	return 1;
+}
+
+static int get_default (int value, int def_value)
+{
+    if (value)
+	return value;
+    else
+	return def_value;
+}
+
+asmlinkage int sunos_nfs_mount(char *dir_name, int linux_flags, void *data)
+{
+	int  ret = -ENODEV, error;
+	int  server_fd;
+	char *the_name;
+	struct nfs_mount_data linux_nfs_mount;
+	struct sunos_nfs_mount_args *sunos_mount = data;
+	dev_t dev;
+	struct pt_regs *regs;
+
+	error = verify_area(VERIFY_READ, data, sizeof (struct sunos_nfs_mount_args));
+	if (error)
+		return error;
+	/* Ok, here comes the fun part: Linux's nfs mount needs a
+	 * socket connection to the server, but SunOS mount does not
+	 * requiere this, so we use the information on the destination
+	 * address to create a socket and bind it to a reserved
+	 * port on this system
+	 */
+	server_fd = sys_socket (AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+	if (server_fd < 0)
+		return -ENXIO;
+
+	if (!sunos_nfs_get_server_fd (server_fd, sunos_mount->addr)){
+		sys_close (server_fd);
+		return -ENXIO;
+	}
+
+	/* Now, bind it to a locally reserved port */
+	linux_nfs_mount.version  = NFS_MOUNT_VERSION;
+	linux_nfs_mount.flags    = sunos_mount->flags;
+	linux_nfs_mount.addr     = *sunos_mount->addr;
+	linux_nfs_mount.root     = *sunos_mount->fh;
+	linux_nfs_mount.fd       = server_fd;
+	
+	linux_nfs_mount.rsize    = get_default (sunos_mount->rsize, 8192);
+	linux_nfs_mount.wsize    = get_default (sunos_mount->wsize, 8192);
+	linux_nfs_mount.timeo    = get_default (sunos_mount->timeo, 10);
+	linux_nfs_mount.retrans  = sunos_mount->retrans;
+	
+	linux_nfs_mount.acregmin = sunos_mount->acregmin;
+	linux_nfs_mount.acregmax = sunos_mount->acregmax;
+	linux_nfs_mount.acdirmin = sunos_mount->acdirmin;
+	linux_nfs_mount.acdirmax = sunos_mount->acdirmax;
+
+	if (getname (sunos_mount->hostname, &the_name))
+		return -EFAULT;
+
+	strncpy (linux_nfs_mount.hostname, the_name, 254);
+	linux_nfs_mount.hostname [255] = 0;
+	putname (the_name);
+
+	dev = get_unnamed_dev ();
+	
+	ret = do_mount (dev, dir_name, "nfs", linux_flags, &linux_nfs_mount);
+	if (ret)
+	    put_unnamed_dev(dev);
+
+#if 0
+	/* Kill the process: the nfs directory is already mounted */
+	regs = (struct pt_regs *) (((current->tss.ksp) & PAGE_MASK) +
+				   (PAGE_SIZE - TRACEREG_SZ));
+	current->tss.sig_address = regs->pc;
+	current->tss.sig_desc = regs->u_regs[UREG_G1];
+	send_sig(SIGSYS, current, 1);
+#endif
+	return ret;
+}
+
+asmlinkage int
+sunos_mount(char *type, char *dir, int flags, void *data)
+{
+	int linux_flags = MS_MGC_MSK; /* new semantics */
+	int error;
+	char *dev_fname = 0;
+
+	/* We don't handle the integer fs type */
+	if ((flags & SMNT_NEWTYPE) == 0)
+		return -EINVAL;
+
+	/* Do not allow for those flags we don't support */
+	if (flags & (SMNT_GRPID|SMNT_NOSUB|SMNT_MULTI|SMNT_SYS5))
+		return -EINVAL;
+
+	if(flags & SMNT_REMOUNT)
+		linux_flags |= MS_REMOUNT;
+	if(flags & SMNT_RDONLY)
+		linux_flags |= MS_RDONLY;
+	if(flags & SMNT_NOSUID)
+		linux_flags |= MS_NOSUID;
+	error = verify_area(VERIFY_READ, type, 16);
+	if(error)
+		return error;
+	if(strcmp(type, "ext2") == 0) {
+		dev_fname = (char *) data;;
+	} else if(strcmp(type, "iso9660") == 0) {
+		dev_fname = (char *) data;
+	} else if(strcmp(type, "minix") == 0) {
+		dev_fname = (char *) data;
+	} else if(strcmp(type, "ext") == 0) {
+		dev_fname = (char *) data;
+	} else if(strcmp(type, "xiafs") == 0) {
+		dev_fname = (char *) data;
+	} else if(strcmp(type, "nfs") == 0) {
+		error = sunos_nfs_mount (dir, flags, data);
+		return error;
+        } else if(strcmp(type, "ufs") == 0) {
+		printk("Warning: UFS filesystem mounts unsupported.\n");
+		return -ENODEV;
+	} else if(strcmp(type, "proc")) {
+		return -ENODEV;
+	}
+	if(error)
+		return error;
+	error = sys_mount(dev_fname, dir, type, linux_flags, NULL);
+	printk("sys_mount(type<%s>, device<%s>) returns %d\n",
+	       type, dev_fname, error);
+	return error;
+}
+
+extern asmlinkage int sys_setsid(void);
+extern asmlinkage int sys_setpgid(pid_t, pid_t);
+
+asmlinkage int sunos_setpgrp(pid_t pid, pid_t pgid)
+{
+	/* So stupid... */
+	if((!pid || pid == current->pid) &&
+	   !pgid) {
+		sys_setsid();
+		return 0;
+	} else {
+		return sys_setpgid(pid, pgid);
+	}
+}
+
+/* So stupid... */
+extern asmlinkage int sys_wait4(pid_t, unsigned int *, int, struct rusage *);
+asmlinkage int sunos_wait4(pid_t pid, unsigned int *stat_addr, int options, struct rusage *ru)
+{
+	return sys_wait4((pid ? pid : -1), stat_addr, options, ru);
+}
+
+extern int kill_pg(int, int, int);
+asmlinkage int sunos_killpg(int pgrp, int sig)
+{
+	return kill_pg(pgrp, sig, 0);
+}
+
+extern asmlinkage sunos_audit ()
+{
+	printk ("sys_audit\n");
+	return -1;
+}
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen, slshen@lbl.gov with Sam's (original) version
of this