Add m-esr52 at 52.6.0

1 files changed, 624 insertions, 0 deletions

diff --git a/nsprpub/pr/include/md/_unixos.h b/nsprpub/pr/include/md/_unixos.h
new file mode 100644
index 000000000..ea46b3a47
--- /dev/null
+++ b/nsprpub/pr/include/md/_unixos.h
@@ -0,0 +1,624 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef prunixos_h___
+#define prunixos_h___
+
+/*
+ * If FD_SETSIZE is not defined on the command line, set the default value
+ * before include select.h
+ */
+/*
+ * Linux: FD_SETSIZE is defined in /usr/include/sys/select.h and should
+ * not be redefined.
+ */
+#if !defined(LINUX) && !defined(__GNU__) && !defined(__GLIBC__) \
+    && !defined(DARWIN)
+#ifndef FD_SETSIZE
+#define FD_SETSIZE  4096
+#endif
+#endif
+
+#include <unistd.h>
+#include <stddef.h>
+#include <sys/stat.h>
+#include <dirent.h>
+#include <errno.h>
+
+#include "prio.h"
+#include "prmem.h"
+#include "prclist.h"
+
+/*
+ * For select(), fd_set, and struct timeval.
+ *
+ * In The Single UNIX(R) Specification, Version 2,
+ * the header file for select() is <sys/time.h>.
+ * In Version 3, the header file for select() is
+ * changed to <sys/select.h>.
+ *
+ * fd_set is defined in <sys/types.h>.  Usually
+ * <sys/time.h> includes <sys/types.h>, but on some
+ * older systems <sys/time.h> does not include
+ * <sys/types.h>, so we include it explicitly.
+ */
+#include <sys/time.h>
+#include <sys/types.h>
+#if defined(AIX) || defined(SYMBIAN)
+#include <sys/select.h>
+#endif
+
+#ifndef SYMBIAN
+#define HAVE_NETINET_TCP_H
+#endif
+
+#define _PR_HAVE_O_APPEND
+
+#define PR_DIRECTORY_SEPARATOR		'/'
+#define PR_DIRECTORY_SEPARATOR_STR	"/"
+#define PR_PATH_SEPARATOR		':'
+#define PR_PATH_SEPARATOR_STR		":"
+typedef int (*FARPROC)();
+
+/*
+ * intervals at which GLOBAL threads wakeup to check for pending interrupt
+ */
+#define _PR_INTERRUPT_CHECK_INTERVAL_SECS 5
+extern PRIntervalTime intr_timeout_ticks;
+
+/*
+ * The bit flags for the in_flags and out_flags fields
+ * of _PR_UnixPollDesc
+ */
+#ifdef _PR_USE_POLL
+#define _PR_UNIX_POLL_READ    POLLIN
+#define _PR_UNIX_POLL_WRITE   POLLOUT
+#define _PR_UNIX_POLL_EXCEPT  POLLPRI
+#define _PR_UNIX_POLL_ERR     POLLERR
+#define _PR_UNIX_POLL_NVAL    POLLNVAL
+#define _PR_UNIX_POLL_HUP     POLLHUP
+#else /* _PR_USE_POLL */
+#define _PR_UNIX_POLL_READ    0x1
+#define _PR_UNIX_POLL_WRITE   0x2
+#define _PR_UNIX_POLL_EXCEPT  0x4
+#define _PR_UNIX_POLL_ERR     0x8
+#define _PR_UNIX_POLL_NVAL    0x10
+#define _PR_UNIX_POLL_HUP     0x20
+#endif /* _PR_USE_POLL */
+
+typedef struct _PRUnixPollDesc {
+	PRInt32 osfd;
+	PRInt16 in_flags;
+	PRInt16 out_flags;
+} _PRUnixPollDesc;
+
+typedef struct PRPollQueue {
+    PRCList links;        /* for linking PRPollQueue's together */
+    _PRUnixPollDesc *pds;        /* array of poll descriptors */
+    PRUintn npds;            /* length of the array */
+    PRPackedBool on_ioq;    /* is this on the async i/o work q? */
+    PRIntervalTime timeout;        /* timeout, in ticks */
+    struct PRThread *thr;
+} PRPollQueue;
+
+#define _PR_POLLQUEUE_PTR(_qp) \
+    ((PRPollQueue*) ((char*) (_qp) - offsetof(PRPollQueue,links)))
+
+
+extern PRInt32 _PR_WaitForMultipleFDs(
+    _PRUnixPollDesc *unixpds,
+    PRInt32 pdcnt,
+    PRIntervalTime timeout);
+extern void _PR_Unblock_IO_Wait(struct PRThread *thr);
+
+#if defined(_PR_LOCAL_THREADS_ONLY) || defined(_PR_GLOBAL_THREADS_ONLY)
+#define _MD_CHECK_FOR_EXIT()
+#endif
+
+extern fd_set _pr_md_read_set, _pr_md_write_set, _pr_md_exception_set;
+extern PRInt16 _pr_md_read_cnt[], _pr_md_write_cnt[], _pr_md_exception_cnt[];
+extern PRInt32 _pr_md_ioq_max_osfd;
+extern PRUint32 _pr_md_ioq_timeout;
+
+struct _MDFileDesc {
+    int osfd;
+#if defined(LINUX) && defined(_PR_PTHREADS)
+    int tcp_nodelay;  /* used by pt_LinuxSendFile */
+#endif
+};
+
+struct _MDDir {
+	DIR *d;
+};
+
+struct _PRCPU;
+extern void _MD_unix_init_running_cpu(struct _PRCPU *cpu);
+
+/*
+** Make a redzone at both ends of the stack segment. Disallow access
+** to those pages of memory. It's ok if the mprotect call's don't
+** work - it just means that we don't really have a functional
+** redzone.
+*/
+#include <sys/mman.h>
+#ifndef PROT_NONE
+#define PROT_NONE 0x0
+#endif
+
+#if defined(DEBUG) && !defined(DARWIN)
+#if !defined(SOLARIS)	
+#include <string.h>  /* for memset() */
+#define _MD_INIT_STACK(ts,REDZONE)					\
+    PR_BEGIN_MACRO                 					\
+	(void) mprotect((void*)ts->seg->vaddr, REDZONE, PROT_NONE);	\
+	(void) mprotect((void*) ((char*)ts->seg->vaddr + REDZONE + ts->stackSize),\
+			REDZONE, PROT_NONE);				\
+    /*									\
+    ** Fill stack memory with something that turns into an illegal	\
+    ** pointer value. This will sometimes find runtime references to	\
+    ** uninitialized pointers. We don't do this for solaris because we	\
+    ** can use purify instead.						\
+    */									\
+    if (_pr_debugStacks) {						\
+	memset(ts->allocBase + REDZONE, 0xf7, ts->stackSize);		\
+    }									\
+    PR_END_MACRO
+#else	/* !SOLARIS	*/
+#define _MD_INIT_STACK(ts,REDZONE)					\
+    PR_BEGIN_MACRO                 					\
+	(void) mprotect((void*)ts->seg->vaddr, REDZONE, PROT_NONE);	\
+	(void) mprotect((void*) ((char*)ts->seg->vaddr + REDZONE + ts->stackSize),\
+			REDZONE, PROT_NONE);				\
+    PR_END_MACRO
+#endif	/* !SOLARIS	*/
+
+/*
+ * _MD_CLEAR_STACK
+ *	Allow access to the redzone pages; the access was turned off in
+ *	_MD_INIT_STACK.
+ */
+#define _MD_CLEAR_STACK(ts)						\
+    PR_BEGIN_MACRO                 					\
+	(void) mprotect((void*)ts->seg->vaddr, REDZONE, PROT_READ|PROT_WRITE);\
+	(void) mprotect((void*) ((char*)ts->seg->vaddr + REDZONE + ts->stackSize),\
+			REDZONE, PROT_READ|PROT_WRITE);			\
+    PR_END_MACRO
+
+#else	/* DEBUG */
+
+#define _MD_INIT_STACK(ts,REDZONE)
+#define _MD_CLEAR_STACK(ts)
+
+#endif	/* DEBUG */
+
+#if !defined(SOLARIS) 
+
+#define PR_SET_INTSOFF(newval)
+
+#endif
+
+/************************************************************************/
+
+extern void _PR_UnixInit(void);
+
+extern void _PR_UnixCleanup(void);
+#define _MD_EARLY_CLEANUP _PR_UnixCleanup
+
+/************************************************************************/
+
+struct _MDProcess {
+    pid_t pid;
+};
+
+struct PRProcess;
+struct PRProcessAttr;
+
+/* Create a new process (fork() + exec()) */
+#define _MD_CREATE_PROCESS _MD_CreateUnixProcess
+extern struct PRProcess * _MD_CreateUnixProcess(
+    const char *path,
+    char *const *argv,
+    char *const *envp,
+    const struct PRProcessAttr *attr
+);
+
+#define _MD_DETACH_PROCESS _MD_DetachUnixProcess
+extern PRStatus _MD_DetachUnixProcess(struct PRProcess *process);
+
+/* Wait for a child process to terminate */
+#define _MD_WAIT_PROCESS _MD_WaitUnixProcess
+extern PRStatus _MD_WaitUnixProcess(struct PRProcess *process,
+    PRInt32 *exitCode);
+
+#define _MD_KILL_PROCESS _MD_KillUnixProcess
+extern PRStatus _MD_KillUnixProcess(struct PRProcess *process);
+
+/************************************************************************/
+
+extern void _MD_EnableClockInterrupts(void);
+extern void _MD_DisableClockInterrupts(void);
+
+#define _MD_START_INTERRUPTS			_MD_StartInterrupts
+#define _MD_STOP_INTERRUPTS				_MD_StopInterrupts
+#define _MD_DISABLE_CLOCK_INTERRUPTS	_MD_DisableClockInterrupts
+#define _MD_ENABLE_CLOCK_INTERRUPTS		_MD_EnableClockInterrupts
+#define _MD_BLOCK_CLOCK_INTERRUPTS		_MD_BlockClockInterrupts
+#define _MD_UNBLOCK_CLOCK_INTERRUPTS	_MD_UnblockClockInterrupts
+
+/************************************************************************/
+
+extern void		_MD_InitCPUS(void);
+#define _MD_INIT_CPUS           _MD_InitCPUS
+
+extern void		_MD_Wakeup_CPUs(void);
+#define _MD_WAKEUP_CPUS _MD_Wakeup_CPUs
+
+#define _MD_PAUSE_CPU			_MD_PauseCPU
+
+#if defined(_PR_LOCAL_THREADS_ONLY) || defined(_PR_GLOBAL_THREADS_ONLY)
+#define _MD_CLEANUP_BEFORE_EXIT()
+#endif
+
+#ifndef IRIX
+#define _MD_EXIT(status)		_exit(status)
+#endif
+
+/************************************************************************/
+
+#define _MD_GET_ENV				getenv
+#define _MD_PUT_ENV				putenv
+
+/************************************************************************/
+
+#define _MD_INIT_FILEDESC(fd)
+
+extern void		_MD_MakeNonblock(PRFileDesc *fd);
+#define _MD_MAKE_NONBLOCK			_MD_MakeNonblock		
+
+/************************************************************************/
+
+#if !defined(_PR_PTHREADS)
+
+extern void		_MD_InitSegs(void);
+extern PRStatus	_MD_AllocSegment(PRSegment *seg, PRUint32 size,
+				void *vaddr);
+extern void		_MD_FreeSegment(PRSegment *seg);
+
+#define _MD_INIT_SEGS			_MD_InitSegs
+#define _MD_ALLOC_SEGMENT		_MD_AllocSegment
+#define _MD_FREE_SEGMENT		_MD_FreeSegment
+
+#endif /* !defined(_PR_PTHREADS) */
+
+/************************************************************************/
+
+#ifdef _MD_INTERVAL_USE_GTOD
+extern PRIntervalTime   _PR_UNIX_GetInterval(void);
+extern PRIntervalTime   _PR_UNIX_TicksPerSecond(void);
+#define _MD_INTERVAL_INIT()
+#define _MD_GET_INTERVAL		_PR_UNIX_GetInterval
+#define _MD_INTERVAL_PER_SEC		_PR_UNIX_TicksPerSecond
+#endif
+
+#ifdef _PR_HAVE_CLOCK_MONOTONIC
+extern PRIntervalTime   _PR_UNIX_GetInterval2(void);
+extern PRIntervalTime   _PR_UNIX_TicksPerSecond2(void);
+#define _MD_INTERVAL_INIT()
+#define _MD_GET_INTERVAL		_PR_UNIX_GetInterval2
+#define _MD_INTERVAL_PER_SEC		_PR_UNIX_TicksPerSecond2
+#endif
+
+#define _MD_INTERVAL_PER_MILLISEC()	(_PR_MD_INTERVAL_PER_SEC() / 1000)
+#define _MD_INTERVAL_PER_MICROSEC()	(_PR_MD_INTERVAL_PER_SEC() / 1000000)
+
+/************************************************************************/
+
+#define _MD_ERRNO()             	(errno)
+#define _MD_GET_SOCKET_ERROR()		(errno)
+
+/************************************************************************/
+
+extern PRInt32 _MD_AvailableSocket(PRInt32 osfd);
+
+extern void _MD_StartInterrupts(void);
+extern void _MD_StopInterrupts(void);
+extern void _MD_DisableClockInterrupts(void);
+extern void _MD_BlockClockInterrupts(void);
+extern void _MD_UnblockClockInterrupts(void);
+extern void _MD_PauseCPU(PRIntervalTime timeout);
+
+extern PRStatus _MD_open_dir(struct _MDDir *, const char *);
+extern PRInt32  _MD_close_dir(struct _MDDir *);
+extern char *   _MD_read_dir(struct _MDDir *, PRIntn);
+extern PRInt32  _MD_open(const char *name, PRIntn osflags, PRIntn mode);
+extern PRInt32	_MD_delete(const char *name);
+extern PRInt32	_MD_getfileinfo(const char *fn, PRFileInfo *info);
+extern PRInt32  _MD_getfileinfo64(const char *fn, PRFileInfo64 *info);
+extern PRInt32  _MD_getopenfileinfo(const PRFileDesc *fd, PRFileInfo *info);
+extern PRInt32  _MD_getopenfileinfo64(const PRFileDesc *fd, PRFileInfo64 *info);
+extern PRInt32	_MD_rename(const char *from, const char *to);
+extern PRInt32	_MD_access(const char *name, PRAccessHow how);
+extern PRInt32	_MD_mkdir(const char *name, PRIntn mode);
+extern PRInt32	_MD_rmdir(const char *name);
+extern PRInt32	_MD_accept_read(PRInt32 sock, PRInt32 *newSock,
+				PRNetAddr **raddr, void *buf, PRInt32 amount);
+extern PRInt32 	_PR_UnixSendFile(PRFileDesc *sd, PRSendFileData *sfd,
+			PRTransmitFileFlags flags, PRIntervalTime timeout);
+
+extern PRStatus _MD_LockFile(PRInt32 osfd);
+extern PRStatus _MD_TLockFile(PRInt32 osfd);
+extern PRStatus _MD_UnlockFile(PRInt32 osfd);
+
+#define _MD_OPEN_DIR(dir, name)		    _MD_open_dir(dir, name)
+#define _MD_CLOSE_DIR(dir)		        _MD_close_dir(dir)
+#define _MD_READ_DIR(dir, flags)	    _MD_read_dir(dir, flags)
+#define _MD_OPEN(name, osflags, mode)	_MD_open(name, osflags, mode)
+#define _MD_OPEN_FILE(name, osflags, mode)	_MD_open(name, osflags, mode)
+extern PRInt32 _MD_read(PRFileDesc *fd, void *buf, PRInt32 amount);
+#define _MD_READ(fd,buf,amount)		    _MD_read(fd,buf,amount)
+extern PRInt32 _MD_write(PRFileDesc *fd, const void *buf, PRInt32 amount);
+#define _MD_WRITE(fd,buf,amount)	    _MD_write(fd,buf,amount)
+#define _MD_DELETE(name)		        _MD_delete(name)
+#define _MD_GETFILEINFO(fn, info)	    _MD_getfileinfo(fn, info)
+#define _MD_GETFILEINFO64(fn, info)	    _MD_getfileinfo64(fn, info)
+#define _MD_GETOPENFILEINFO(fd, info)	_MD_getopenfileinfo(fd, info)
+#define _MD_GETOPENFILEINFO64(fd, info)	_MD_getopenfileinfo64(fd, info)
+#define _MD_RENAME(from, to)		    _MD_rename(from, to)
+#define _MD_ACCESS(name, how)		    _MD_access(name, how)
+#define _MD_MKDIR(name, mode)		    _MD_mkdir(name, mode)
+#define _MD_MAKE_DIR(name, mode)		_MD_mkdir(name, mode)
+#define _MD_RMDIR(name)			        _MD_rmdir(name)
+#define _MD_ACCEPT_READ(sock, newSock, raddr, buf, amount)	_MD_accept_read(sock, newSock, raddr, buf, amount)
+
+#define _MD_LOCKFILE _MD_LockFile
+#define _MD_TLOCKFILE _MD_TLockFile
+#define _MD_UNLOCKFILE _MD_UnlockFile
+
+
+extern PRInt32		_MD_socket(int af, int type, int flags);
+#define _MD_SOCKET	_MD_socket
+extern PRInt32		_MD_connect(PRFileDesc *fd, const PRNetAddr *addr,
+								PRUint32 addrlen, PRIntervalTime timeout);
+#define _MD_CONNECT	_MD_connect
+extern PRInt32		_MD_accept(PRFileDesc *fd, PRNetAddr *addr, PRUint32 *addrlen,
+													PRIntervalTime timeout);
+#define _MD_ACCEPT	_MD_accept
+extern PRInt32		_MD_bind(PRFileDesc *fd, const PRNetAddr *addr, PRUint32 addrlen);
+#define _MD_BIND	_MD_bind
+extern PRInt32		_MD_listen(PRFileDesc *fd, PRIntn backlog);
+#define _MD_LISTEN	_MD_listen
+extern PRInt32		_MD_shutdown(PRFileDesc *fd, PRIntn how);
+#define _MD_SHUTDOWN	_MD_shutdown
+
+extern PRInt32		_MD_recv(PRFileDesc *fd, void *buf, PRInt32 amount, 
+                               PRIntn flags, PRIntervalTime timeout);
+#define _MD_RECV	_MD_recv
+extern PRInt32		_MD_send(PRFileDesc *fd, const void *buf, PRInt32 amount,
+									PRIntn flags, PRIntervalTime timeout);
+#define _MD_SEND	_MD_send
+extern PRInt32		_MD_recvfrom(PRFileDesc *fd, void *buf, PRInt32 amount,
+						PRIntn flags, PRNetAddr *addr, PRUint32 *addrlen,
+											PRIntervalTime timeout);
+#define _MD_RECVFROM	_MD_recvfrom
+extern PRInt32 _MD_sendto(PRFileDesc *fd, const void *buf, PRInt32 amount,
+							PRIntn flags, const PRNetAddr *addr, PRUint32 addrlen,
+												PRIntervalTime timeout);
+#define _MD_SENDTO	_MD_sendto
+extern PRInt32		_MD_writev(PRFileDesc *fd, const struct PRIOVec *iov,
+								PRInt32 iov_size, PRIntervalTime timeout);
+#define _MD_WRITEV	_MD_writev
+
+extern PRInt32		_MD_socketavailable(PRFileDesc *fd);
+#define	_MD_SOCKETAVAILABLE		_MD_socketavailable
+extern PRInt64		_MD_socketavailable64(PRFileDesc *fd);
+#define	_MD_SOCKETAVAILABLE64		_MD_socketavailable64
+
+#define	_MD_PIPEAVAILABLE		_MD_socketavailable
+
+extern PRInt32 _MD_pr_poll(PRPollDesc *pds, PRIntn npds,
+												PRIntervalTime timeout);
+#define _MD_PR_POLL		_MD_pr_poll
+
+extern PRInt32		_MD_close(PRInt32 osfd);
+#define _MD_CLOSE_FILE	_MD_close
+extern PRInt32		_MD_lseek(PRFileDesc*, PRInt32, PRSeekWhence);
+#define _MD_LSEEK	_MD_lseek
+extern PRInt64		_MD_lseek64(PRFileDesc*, PRInt64, PRSeekWhence);
+#define _MD_LSEEK64	_MD_lseek64
+extern PRInt32		_MD_fsync(PRFileDesc *fd);
+#define _MD_FSYNC	_MD_fsync
+
+extern PRInt32 _MD_socketpair(int af, int type, int flags, PRInt32 *osfd);
+#define _MD_SOCKETPAIR		_MD_socketpair
+
+#define _MD_CLOSE_SOCKET	_MD_close
+
+#ifndef NO_NSPR_10_SUPPORT
+#define _MD_STAT	stat
+#endif
+
+extern PRStatus _MD_getpeername(PRFileDesc *fd, PRNetAddr *addr,
+											PRUint32 *addrlen);
+#define _MD_GETPEERNAME _MD_getpeername
+extern PRStatus _MD_getsockname(PRFileDesc *fd, PRNetAddr *addr,
+											PRUint32 *addrlen);
+#define _MD_GETSOCKNAME _MD_getsockname
+
+extern PRStatus _MD_getsockopt(PRFileDesc *fd, PRInt32 level,
+						PRInt32 optname, char* optval, PRInt32* optlen);
+#define _MD_GETSOCKOPT		_MD_getsockopt
+extern PRStatus _MD_setsockopt(PRFileDesc *fd, PRInt32 level,
+					PRInt32 optname, const char* optval, PRInt32 optlen);
+#define _MD_SETSOCKOPT		_MD_setsockopt
+
+extern PRStatus _MD_set_fd_inheritable(PRFileDesc *fd, PRBool inheritable);
+#define _MD_SET_FD_INHERITABLE _MD_set_fd_inheritable
+
+extern void _MD_init_fd_inheritable(PRFileDesc *fd, PRBool imported);
+#define _MD_INIT_FD_INHERITABLE _MD_init_fd_inheritable
+
+extern void _MD_query_fd_inheritable(PRFileDesc *fd);
+#define _MD_QUERY_FD_INHERITABLE _MD_query_fd_inheritable
+
+extern PRStatus _MD_gethostname(char *name, PRUint32 namelen);
+#define _MD_GETHOSTNAME		_MD_gethostname
+
+extern PRStatus _MD_getsysinfo(PRSysInfo cmd, char *name, PRUint32 namelen);
+#define _MD_GETSYSINFO		_MD_getsysinfo
+
+extern int _MD_unix_get_nonblocking_connect_error(int osfd);
+
+/* Memory-mapped files */
+
+struct _MDFileMap {
+    PRIntn prot;
+    PRIntn flags;
+    PRBool isAnonFM; /* when true, PR_CloseFileMap() must close the related fd */
+};
+
+extern PRStatus _MD_CreateFileMap(struct PRFileMap *fmap, PRInt64 size);
+#define _MD_CREATE_FILE_MAP _MD_CreateFileMap
+
+#define _MD_GET_MEM_MAP_ALIGNMENT() PR_GetPageSize()
+
+extern void * _MD_MemMap(struct PRFileMap *fmap, PRInt64 offset,
+        PRUint32 len);
+#define _MD_MEM_MAP _MD_MemMap
+
+extern PRStatus _MD_MemUnmap(void *addr, PRUint32 size);
+#define _MD_MEM_UNMAP _MD_MemUnmap
+
+extern PRStatus _MD_CloseFileMap(struct PRFileMap *fmap);
+#define _MD_CLOSE_FILE_MAP _MD_CloseFileMap
+
+extern PRStatus _MD_SyncMemMap(
+    PRFileDesc *fd,
+    void *addr,
+    PRUint32 len);
+#define _MD_SYNC_MEM_MAP _MD_SyncMemMap
+
+/*
+ * The standard (XPG4) gettimeofday() (from BSD) takes two arguments.
+ * On some SVR4 derivatives, gettimeofday() takes only one argument.
+ * The GETTIMEOFDAY macro is intended to hide this difference.
+ */
+#ifdef HAVE_SVID_GETTOD
+#define GETTIMEOFDAY(tp) gettimeofday(tp)
+#else
+#define GETTIMEOFDAY(tp) gettimeofday((tp), NULL)
+#endif
+
+#if defined(_PR_PTHREADS) && !defined(_PR_POLL_AVAILABLE)
+#define _PR_NEED_FAKE_POLL
+#endif
+
+#if defined(_PR_NEED_FAKE_POLL)
+
+/*
+ * Some platforms don't have poll(), but our pthreads code calls poll().
+ * As a temporary measure, I implemented a fake poll() using select().
+ * Here are the struct and macro definitions copied from sys/poll.h
+ * on Solaris 2.5.
+ */
+
+struct pollfd {
+    int fd;
+    short events;
+    short revents;
+};
+
+/* poll events */
+
+#define	POLLIN		0x0001		/* fd is readable */
+#define	POLLPRI		0x0002		/* high priority info at fd */
+#define	POLLOUT		0x0004		/* fd is writeable (won't block) */
+#define	POLLRDNORM	0x0040		/* normal data is readable */
+#define	POLLWRNORM	POLLOUT
+#define	POLLRDBAND	0x0080		/* out-of-band data is readable */
+#define	POLLWRBAND	0x0100		/* out-of-band data is writeable */
+
+#define	POLLNORM	POLLRDNORM
+
+#define	POLLERR		0x0008		/* fd has error condition */
+#define	POLLHUP		0x0010		/* fd has been hung up on */
+#define	POLLNVAL	0x0020		/* invalid pollfd entry */
+
+extern int poll(struct pollfd *, unsigned long, int);
+
+#endif /* _PR_NEED_FAKE_POLL */
+
+/*
+** A vector of the UNIX I/O calls we use. These are here to smooth over
+** the rough edges needed for large files. All of NSPR's implmentaions
+** go through this vector using syntax of the form
+**      result = _md_iovector.xxx64(args);
+*/
+
+#if defined(SOLARIS2_5)
+/*
+** Special case: Solaris 2.5.1
+** Solaris starts to have 64-bit file I/O in 2.6.  We build on Solaris
+** 2.5.1 so that we can use the same binaries on both Solaris 2.5.1 and
+** 2.6.  At run time, we detect whether 64-bit file I/O is available by
+** looking up the 64-bit file function symbols in libc.  At build time,
+** we need to define the 64-bit file I/O datatypes that are compatible
+** with their definitions on Solaris 2.6.
+*/
+typedef PRInt64 off64_t;
+typedef PRUint64 ino64_t;
+typedef PRInt64 blkcnt64_t;
+struct stat64 {
+    dev_t st_dev;
+    long st_pad1[3];
+    ino64_t st_ino;
+    mode_t st_mode;
+    nlink_t st_nlink;
+    uid_t st_uid;
+    gid_t st_gid;
+    dev_t st_rdev;
+    long t_pad2[2];
+    off64_t st_size;
+    timestruc_t st_atim;
+    timestruc_t st_mtim;
+    timestruc_t st_ctim;
+    long st_blksize;
+    blkcnt64_t st_blocks;
+    char st_fstype[_ST_FSTYPSZ];
+    long st_pad4[8];
+};
+typedef struct stat64 _MDStat64;
+typedef off64_t _MDOff64_t;
+
+#elif defined(_PR_HAVE_OFF64_T)
+typedef struct stat64 _MDStat64;
+typedef off64_t _MDOff64_t;
+#elif defined(_PR_HAVE_LARGE_OFF_T)
+typedef struct stat _MDStat64;
+typedef off_t _MDOff64_t;
+#elif defined(_PR_NO_LARGE_FILES)
+typedef struct stat _MDStat64;
+typedef PRInt64 _MDOff64_t;
+#else
+#error "I don't know yet"
+#endif
+
+typedef PRIntn (*_MD_Fstat64)(PRIntn osfd, _MDStat64 *buf);
+typedef PRIntn (*_MD_Open64)(const char *path, int oflag, ...);
+typedef PRIntn (*_MD_Stat64)(const char *path, _MDStat64 *buf);
+typedef _MDOff64_t (*_MD_Lseek64)(PRIntn osfd, _MDOff64_t, PRIntn whence);
+typedef void* (*_MD_Mmap64)(
+    void *addr, PRSize len, PRIntn prot, PRIntn flags,
+    PRIntn fildes, _MDOff64_t offset);
+struct _MD_IOVector
+{
+    _MD_Open64 _open64;
+    _MD_Mmap64 _mmap64;
+    _MD_Stat64 _stat64;
+    _MD_Fstat64 _fstat64;
+    _MD_Lseek64 _lseek64;
+};
+extern struct _MD_IOVector _md_iovector;
+
+#endif /* prunixos_h___ */