Fri Dec 8 13:04:51 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>cvs/libc-951210cvs/libc-951209

	* locale/error.c, locale/error.h: Files removed.
	* locale/Makefile (distribute): Remove error.h.
	(lib-modules): Remove error.

	* hurd/hurdlookup.c (__hurd_file_name_lookup_retry): For "tty"
	magic, return ENXIO if no ctty.

	* sysdeps/mach/hurd/mmap.c: For MAP_FIXED, deallocate a previous
	mapping if vm_map fails for that reason.

	* posix/glob.c: Implement new options GLOB_ALTDIRFUNC, GLOB_BRACE,
	GLOB_TILDE, GLOB_NOMAGIC.
	(glob): Use stat instead of lstat to determine directoriness.
	* posix/glob.h (GLOB_ALTDIRFUNC, GLOB_BRACE, GLOB_NOMAGIC, GLOB_TILDE):
	New flag bits.
	(__GLOB_FLAGS): Include them.
	(glob_t): New members gl_closedir, gl_readdir, gl_opendir, gl_lstat,
	gl_stat.

	* elf/elf.h (ET_NUM, SHT_NUM, STB_NUM, STT_NUM, PT_NUM): New macros.

	* sysdeps/unix/sysv/linux/sys/mman.h: Include <linux/mman.h> to
	define all the bit values.
	(MAP_*, MCL_*): Macros removed.

8 files changed, 191 insertions, 89 deletions

diff --git a/ChangeLog b/ChangeLog
index acbb524..07b9e34 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,30 @@
+Fri Dec  8 13:04:51 1995  Roland McGrath  <roland@churchy.gnu.ai.mit.edu>
+
+	* locale/error.c, locale/error.h: Files removed.
+	* locale/Makefile (distribute): Remove error.h.
+	(lib-modules): Remove error.
+
+	* hurd/hurdlookup.c (__hurd_file_name_lookup_retry): For "tty"
+	magic, return ENXIO if no ctty.
+
+	* sysdeps/mach/hurd/mmap.c: For MAP_FIXED, deallocate a previous
+	mapping if vm_map fails for that reason.
+
+	* posix/glob.c: Implement new options GLOB_ALTDIRFUNC, GLOB_BRACE,
+	GLOB_TILDE, GLOB_NOMAGIC.
+	(glob): Use stat instead of lstat to determine directoriness.
+	* posix/glob.h (GLOB_ALTDIRFUNC, GLOB_BRACE, GLOB_NOMAGIC, GLOB_TILDE):
+	New flag bits.
+	(__GLOB_FLAGS): Include them.
+	(glob_t): New members gl_closedir, gl_readdir, gl_opendir, gl_lstat,
+	gl_stat.
+
+	* elf/elf.h (ET_NUM, SHT_NUM, STB_NUM, STT_NUM, PT_NUM): New macros.
+
+	* sysdeps/unix/sysv/linux/sys/mman.h: Include <linux/mman.h> to
+	define all the bit values.
+	(MAP_*, MCL_*): Macros removed.
+
 Thu Dec  7 02:27:56 1995  Roland McGrath  <roland@churchy.gnu.ai.mit.edu>
 
 	* resolv/res_comp.c, resolv/res_debug.c, resolv/res_send.c:
diff --git a/elf/elf.h b/elf/elf.h
index 2e9e245..85c992c 100644
--- a/elf/elf.h
+++ b/elf/elf.h
@@ -98,6 +98,7 @@ typedef struct
 #define ET_EXEC		2		/* Executable file */
 #define ET_DYN		3		/* Shared object file */
 #define ET_CORE		4		/* Core file */
+#define	ET_NUM		5		/* Number of defined types.  */
 #define ET_LOPROC	0xff00		/* Processor-specific */
 #define ET_HIPROC	0xffff		/* Processor-specific */
 
@@ -168,6 +169,7 @@ typedef struct
 #define SHT_REL		9		/* Relocation entries, no addends */
 #define SHT_SHLIB	10		/* Reserved */
 #define SHT_DYNSYM	11		/* Dynamic linker symbol table */
+#define	SHT_NUM		12		/* Number of defined types.  */
 #define SHT_LOPROC	0x70000000	/* Start of processor-specific */
 #define SHT_HIPROC	0x7fffffff	/* End of processor-specific */
 #define SHT_LOUSER	0x80000000	/* Start of application-specific */
@@ -207,6 +209,7 @@ typedef struct
 #define STB_LOCAL	0		/* Local symbol */
 #define STB_GLOBAL	1		/* Global symbol */
 #define STB_WEAK	2		/* Weak symbol */
+#define	STB_NUM		3		/* Number of defined types.  */
 #define STB_LOPROC	13		/* Start of processor-specific */
 #define STB_HIPROC	15		/* End of processor-specific */
 
@@ -217,6 +220,7 @@ typedef struct
 #define STT_FUNC	2		/* Symbol is a code object */
 #define STT_SECTION	3		/* Symbol associated with a section */
 #define STT_FILE	4		/* Symbol's name is file name */
+#define	STT_NUM		5		/* Number of defined types.  */
 #define STT_LOPROC	13		/* Start of processor-specific */
 #define STT_HIPROC	15		/* End of processor-specific */
 
@@ -273,6 +277,7 @@ typedef struct {
 #define PT_NOTE		4		/* Auxiliary information */
 #define PT_SHLIB	5		/* Reserved */
 #define PT_PHDR		6		/* Entry for header table itself */
+#define	PT_NUM		7		/* Number of defined types.  */
 #define PT_LOPROC	0x70000000	/* Start of processor-specific */
 #define PT_HIPROC	0x7fffffff	/* End of processor-specific */
 
diff --git a/hurd/hurdlookup.c b/hurd/hurdlookup.c
index ee97a13..05ed038 100644
--- a/hurd/hurdlookup.c
+++ b/hurd/hurdlookup.c
@@ -250,6 +250,8 @@ __hurd_file_name_lookup_retry (error_t (*use_init_port)
 			error_t err;
 			error_t ctty_open (file_t port)
 			  {
+			    if (port == MACH_PORT_NULL)
+			      return ENXIO; /* No controlling terminal.  */
 			    return __termctty_open_terminal (port,
 							     flags,
 							     result);
@@ -278,7 +280,7 @@ __hurd_file_name_lookup_retry (error_t (*use_init_port)
 	    bad_magic:
 	      return EGRATUITOUS;
 	    }
-	  break;		
+	  break;
 
 	default:
 	  return EGRATUITOUS;
@@ -308,7 +310,7 @@ __hurd_file_name_split (error_t (*use_init_port)
   error_t addref (file_t crdir)
     {
       *dir = crdir;
-      return __mach_port_mod_refs (__mach_task_self (), 
+      return __mach_port_mod_refs (__mach_task_self (),
 				   crdir, MACH_PORT_RIGHT_SEND, +1);
     }
 
diff --git a/locale/Makefile b/locale/Makefile
index 8865fc3..7e9475b 100644
--- a/locale/Makefile
+++ b/locale/Makefile
@@ -25,7 +25,7 @@ headers		= locale.h
 distribute	= localeinfo.h categories.def \
 		  $(localedef-modules:=.c) $(locale-modules:=.c) \
 		  $(lib-modules:=.c) config.h hash.h iso-4217.def \
-		  keyword.gperf keyword.h localedef.h token.h error.h
+		  keyword.gperf keyword.h localedef.h token.h
 routines	= setlocale loadlocale localeconv nl_langinfo
 categories	= ctype messages monetary numeric time collate
 aux		= $(categories:%=lc-%) $(categories:%=C-%) SYS_libc
@@ -37,7 +37,7 @@ extra-objs	= $(localedef-modules:=.o) $(locale-modules:=.o) \
 localedef-modules	:= charmap locfile-lex locfile-parse locale-ctype \
 			   monetary messages collate numeric
 locale-modules		:= ctypedump
-lib-modules		:= error hash xmalloc
+lib-modules		:= hash xmalloc
 
 
 GPERF = gperf
diff --git a/posix/glob.c b/posix/glob.c
index 90dd9d9..ce17fe1 100644
--- a/posix/glob.c
+++ b/posix/glob.c
@@ -37,8 +37,15 @@ Cambridge, MA 02139, USA.  */
    program understand `configure --with-gnu-libc' and omit the object files,
    it is simpler to just do this in the source for each such file.  */
 
-#if defined (_LIBC) || !defined (__GNU_LIBRARY__)
+#define GLOB_INTERFACE_VERSION 1
+#if !defined (_LIBC) && defined (__GNU_LIBRARY__) && __GNU_LIBRARY__ > 1
+#include <gnu-versions.h>
+#if _GNU_GLOB_INTERFACE_VERSION == GLOB_INTERFACE_VERSION
+#define ELIDE_CODE
+#endif
+#endif
 
+#ifndef ELIDE_CODE
 
 #ifdef	STDC_HEADERS
 #include <stddef.h>
@@ -53,6 +60,8 @@ Cambridge, MA 02139, USA.  */
 #endif
 #endif
 
+#include <pwd.h>
+
 #if !defined(__GNU_LIBRARY__) && !defined(STDC_HEADERS)
 extern int errno;
 #endif
@@ -175,10 +184,7 @@ extern char *alloca ();
 #endif
 
 #ifndef __GNU_LIBRARY__
-#define __lstat lstat
-#ifndef HAVE_LSTAT
-#define lstat stat
-#endif
+#define __stat stat
 #ifdef STAT_MACROS_BROKEN
 #undef S_ISDIR
 #endif
@@ -211,10 +217,6 @@ extern char *alloca ();
 #undef	GLOB_PERIOD
 #include <glob.h>
 
-__ptr_t (*__glob_opendir_hook) __P ((const char *directory));
-const char *(*__glob_readdir_hook) __P ((__ptr_t stream));
-void (*__glob_closedir_hook) __P ((__ptr_t stream));
-
 static int glob_pattern_p __P ((const char *pattern, int quote));
 static int glob_in_dir __P ((const char *pattern, const char *directory,
 			     int flags,
@@ -250,6 +252,56 @@ glob (pattern, flags, errfunc, pglob)
       return -1;
     }
 
+  if (flags & GLOB_BRACE)
+    {
+      const char *begin = strchr (pattern, '{');
+      if (begin != NULL)
+	{
+	  const char *end = strchr (begin + 1, '}');
+	  if (end != NULL && end != begin + 1)
+	    {
+	      size_t restlen = strlen (end + 1) + 1;
+	      const char *p, *comma;
+	      char *buf;
+	      size_t bufsz = 0;
+	      int firstc;
+	      if (!(flags & GLOB_APPEND))
+		{
+		  pglob->gl_pathc = 0;
+		  pglob->gl_pathv = NULL;
+		}
+	      firstc = pglob->gl_pathc;
+	      for (p = begin + 1;; p = comma + 1)
+		{
+		  int result;
+		  comma = strchr (p, ',');
+		  if (comma == NULL)
+		    comma = strchr (p, '\0');
+		  if ((begin - pattern) + (comma - p) + 1 > bufsz)
+		    {
+		      if (bufsz * 2 < comma - p + 1)
+			bufsz *= 2;
+		      else
+			bufsz = comma - p + 1;
+		      buf = __alloca (bufsz);
+		    }
+		  memcpy (buf, pattern, begin - pattern);
+		  memcpy (buf + (begin - pattern), p, comma - p);
+		  memcpy (buf + (begin - pattern) + (comma - p), end, restlen);
+		  result = glob (buf, (flags & ~(GLOB_NOCHECK|GLOB_NOMAGIC) |
+				       GLOB_APPEND), errfunc, pglob);
+		  if (result && result != GLOB_NOMATCH)
+		    return result;
+		  if (*comma == '\0')
+		    break;
+		}
+	      if (pglob->gl_pathc == firstc &&
+		  !(flags & (GLOB_NOCHECK|GLOB_NOMAGIC)))
+		return GLOB_NOMATCH;
+	    }
+	}
+    }
+
   /* Find the filename.  */
   filename = strrchr (pattern, '/');
   if (filename == NULL)
@@ -291,6 +343,35 @@ glob (pattern, flags, errfunc, pglob)
 
   oldcount = pglob->gl_pathc;
 
+  if ((flags & GLOB_TILDE) && dirname[0] == '~')
+    {
+      if (dirname[1] == '\0')
+	{
+	  /* Look up home directory.  */
+	  dirname = getenv ("HOME");
+	  if (dirname == NULL || dirname[0] == '\0')
+	    {
+	      extern char *getlogin ();
+	      char *name = getlogin ();
+	      if (name != NULL)
+		{
+		  struct passwd *p = getpwnam (name);
+		  if (p != NULL)
+		    dirname = p->pw_dir;
+		}
+	    }
+	  if (dirname == NULL || dirname[0] == '\0')
+	    dirname = (char *) "~"; /* No luck.  */
+	}
+      else
+	{
+	  /* Look up specific user's home directory.  */
+	  struct passwd *p = getpwnam (dirname + 1);
+	  if (p != NULL)
+	    dirname = p->pw_dir;
+	}
+    }
+
   if (glob_pattern_p (dirname, !(flags & GLOB_NOESCAPE)))
     {
       /* The directory name contains metacharacters, so we
@@ -414,7 +495,8 @@ glob (pattern, flags, errfunc, pglob)
       int i;
       struct stat st;
       for (i = oldcount; i < pglob->gl_pathc; ++i)
-	if (__lstat (pglob->gl_pathv[i], &st) == 0 &&
+	if (((flags & GLOB_ALTDIRFUNC) ?
+	     *pglob->gl_stat : __stat) (pglob->gl_pathv[i], &st) == 0 &&
 	    S_ISDIR (st.st_mode))
 	  {
  	    size_t len = strlen (pglob->gl_pathv[i]) + 2;
@@ -581,8 +663,9 @@ glob_in_dir (pattern, directory, flags, errfunc, pglob)
     {
       flags |= GLOB_MAGCHAR;
 
-      stream = (__glob_opendir_hook ? (*__glob_opendir_hook) (directory)
-		: (__ptr_t) opendir (directory));
+      stream = ((flags & GLOB_ALTDIRFUNC) ?
+		(*pglob->gl_opendir) (directory) :
+		opendir (directory));
       if (stream == NULL)
 	{
 	  if ((errfunc != NULL && (*errfunc) (directory, errno)) ||
@@ -594,29 +677,20 @@ glob_in_dir (pattern, directory, flags, errfunc, pglob)
 	  {
 	    const char *name;
 	    size_t len;
-
-	    if (__glob_readdir_hook)
-	      {
-		name = (*__glob_readdir_hook) (stream);
-		if (name == NULL)
-		  break;
-		len = 0;
-	      }
-	    else
-	      {
-		struct dirent *d = readdir ((DIR *) stream);
-		if (d == NULL)
-		  break;
-		if (! REAL_DIR_ENTRY (d))
-		  continue;
-		name = d->d_name;
+	    struct dirent *d = ((flags & GLOB_ALTDIRFUNC) ?
+				(*pglob->gl_readdir) (stream) :
+				readdir (stream));
+	    if (d == NULL)
+	      break;
+	    if (! REAL_DIR_ENTRY (d))
+	      continue;
+	    name = d->d_name;
 #ifdef	HAVE_D_NAMLEN
-		len = d->d_namlen;
+	    len = d->d_namlen;
 #else
-		len = 0;
+	    len = 0;
 #endif
-	      }
-		
+
 	    if (fnmatch (pattern, name,
 			 (!(flags & GLOB_PERIOD) ? FNM_PERIOD : 0) |
 			 ((flags & GLOB_NOESCAPE) ? FNM_NOESCAPE : 0)) == 0)
@@ -638,6 +712,10 @@ glob_in_dir (pattern, directory, flags, errfunc, pglob)
 	  }
     }
 
+  if (nfound == 0 && (flags & GLOB_NOMAGIC) &&
+      ! glob_pattern_p (pattern, !(flags & GLOB_NOESCAPE)))
+    flags |= GLOB_NOCHECK;
+
   if (nfound == 0 && (flags & GLOB_NOCHECK))
     {
       size_t len = strlen (pattern);
@@ -673,10 +751,10 @@ glob_in_dir (pattern, directory, flags, errfunc, pglob)
   if (stream != NULL)
     {
       int save = errno;
-      if (__glob_closedir_hook)
-	(*__glob_closedir_hook) (stream);
+      if (flags & GLOB_ALTDIRFUNC)
+	(*pglob->gl_closedir) (stream);
       else
-	(void) closedir ((DIR *) stream);
+	closedir (stream);
       errno = save;
     }
   return nfound == 0 ? GLOB_NOMATCH : 0;
@@ -684,10 +762,10 @@ glob_in_dir (pattern, directory, flags, errfunc, pglob)
  memory_error:
   {
     int save = errno;
-    if (__glob_closedir_hook)
-      (*__glob_closedir_hook) (stream);
+    if (flags & GLOB_ALTDIRFUNC)
+      (*pglob->gl_closedir) (stream);
     else
-      (void) closedir ((DIR *) stream);
+      closedir (stream);
     errno = save;
   }
   while (names != NULL)
@@ -699,4 +777,5 @@ glob_in_dir (pattern, directory, flags, errfunc, pglob)
   return GLOB_NOSPACE;
 }
 
-#endif	/* _LIBC or not __GNU_LIBRARY__.  */
+#endif	/* Not ELIDE_CODE.  */
+
diff --git a/posix/glob.h b/posix/glob.h
index 05ad47f..6eea062 100644
--- a/posix/glob.h
+++ b/posix/glob.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991, 1992 Free Software Foundation, Inc.
+/* Copyright (C) 1991, 1992, 1995 Free Software Foundation, Inc.
 
 This library is free software; you can redistribute it and/or
 modify it under the terms of the GNU Library General Public License as
@@ -47,10 +47,16 @@ extern "C"
 #define	GLOB_NOESCAPE	(1 << 6)/* Backslashes don't quote metacharacters.  */
 #define	GLOB_PERIOD	(1 << 7)/* Leading `.' can be matched by metachars.  */
 #define	__GLOB_FLAGS	(GLOB_ERR|GLOB_MARK|GLOB_NOSORT|GLOB_DOOFFS| \
-			 GLOB_NOESCAPE|GLOB_NOCHECK|GLOB_APPEND|GLOB_PERIOD)
+			 GLOB_NOESCAPE|GLOB_NOCHECK|GLOB_APPEND|     \
+			 GLOB_PERIOD|GLOB_ALTDIRFUNC|GLOB_BRACE|     \
+			 GLOB_NOMAGIC|GLOB_TILDE)
 
 #if !defined (_POSIX_C_SOURCE) || _POSIX_C_SOURCE < 2 || defined (_BSD_SOURCE)
 #define	GLOB_MAGCHAR	(1 << 8)/* Set in gl_flags if any metachars seen.  */
+#define GLOB_ALTDIRFUNC	(1 << 9)/* Use gl_opendir et al functions.  */
+#define GLOB_BRACE	(1 << 10)/* Expand "{a,b}" to "a" "b".  */
+#define GLOB_NOMAGIC	(1 << 11)/* If no magic chars, return the pattern.  */
+#define GLOB_TILDE	(1 <<12)/* Expand ~user and ~ to home directories.  */
 #endif
 
 /* Error returns from `glob'.  */
@@ -59,12 +65,21 @@ extern "C"
 #define	GLOB_NOMATCH	3	/* No matches found.  */
 
 /* Structure describing a globbing run.  */
+struct stat;
 typedef struct
   {
     int gl_pathc;		/* Count of paths matched by the pattern.  */
     char **gl_pathv;		/* List of matched pathnames.  */
     int gl_offs;		/* Slots to reserve in `gl_pathv'.  */
     int gl_flags;		/* Set to FLAGS, maybe | GLOB_MAGCHAR.  */
+
+    /* If the GLOB_ALTDIRFUNC flag is set, the following functions
+       are used instead of the normal file access functions.  */
+    void (*gl_closedir) __P ((void *));
+    struct dirent *(*gl_readdir) __P ((void *));
+    __ptr_t (*gl_opendir) __P ((const char *));
+    int (*gl_lstat) __P ((const char *, struct stat *));
+    int (*gl_stat) __P ((const char *, struct stat *));
   } glob_t;
 
 /* Do glob searching for PATTERN, placing results in PGLOB.
diff --git a/sysdeps/mach/hurd/mmap.c b/sysdeps/mach/hurd/mmap.c
index 4f9304f..0ef847f 100644
--- a/sysdeps/mach/hurd/mmap.c
+++ b/sysdeps/mach/hurd/mmap.c
@@ -110,6 +110,21 @@ __mmap (caddr_t addr, size_t len, int prot, int flags, int fd, off_t offset)
 		  (flags & MAP_INHERIT) == 0 ? VM_INHERIT_NONE :
 		  (flags & (MAP_COPY|MAP_PRIVATE)) ? VM_INHERIT_COPY :
 		  VM_INHERIT_SHARE);
+  if (err == KERN_NO_SPACE && (flags & MAP_FIXED))
+    {
+      /* XXX this is not atomic as it is in unix! */
+      /* The region is already allocated; deallocate it first.  */
+      err = __vm_deallocate (__mach_task_self (), mapaddr, len);
+      if (! err)
+	err = __vm_map (__mach_task_self (),
+			&mapaddr, (vm_size_t) len, (vm_address_t) 0,
+			0, memobj, (vm_offset_t) offset,
+			flags & (MAP_COPY|MAP_PRIVATE),
+			vmprot, VM_PROT_ALL,
+			(flags & MAP_INHERIT) == 0 ? VM_INHERIT_NONE :
+			(flags & (MAP_COPY|MAP_PRIVATE)) ? VM_INHERIT_COPY :
+			VM_INHERIT_SHARE);
+    }
 
   if (memobj != MACH_PORT_NULL)
     __mach_port_deallocate (__mach_task_self (), memobj);
diff --git a/sysdeps/unix/sysv/linux/sys/mman.h b/sysdeps/unix/sysv/linux/sys/mman.h
index 9f0ef72..ac5940b 100644
--- a/sysdeps/unix/sysv/linux/sys/mman.h
+++ b/sysdeps/unix/sysv/linux/sys/mman.h
@@ -26,52 +26,11 @@ Cambridge, MA 02139, USA.  */
 #define __need_size_t
 #include <stddef.h>
 
-
-/* Protections are chosen from these bits, OR'd together.  The
-   implementation does not necessarily support PROT_EXEC or PROT_WRITE
-   without PROT_READ.  The only guarantees are that no writing will be
-   allowed without PROT_WRITE and no access will be allowed for PROT_NONE. */
-
-#define	PROT_NONE	0x00	/* No access.  */
-#define	PROT_READ	0x01	/* Pages can be read.  */
-#define	PROT_WRITE	0x02	/* Pages can be written.  */
-#define	PROT_EXEC	0x04	/* Pages can be executed.  */
-
-
-/* Flags contain mapping type, sharing type and options.  */
-
-/* Mapping type (must choose one and only one of these).  */
-#define	MAP_FILE	0x0000	/* Mapped from a file or device.  */
-#define	MAP_ANON	0x0020	/* Allocated from anonymous virtual memory.  */
-#define	MAP_TYPE	0x000f	/* Mask for type field.  */
-
-/* Sharing types (must choose one and only one of these).  */
-#define	MAP_COPY	MAP_PRIVATE	/* Virtual copy of region at mapping time.  */
-#define	MAP_SHARED	0x0001	/* Share changes.  */
-#define	MAP_PRIVATE	0x0002	/* Changes private; copy pages on write.  */
-
-/* Other flags.  */
-#define	MAP_FIXED	0x0010	/* Map address must be exactly as requested. */
-#define	MAP_NOEXTEND	0x0000	/* For MAP_FILE, don't change file size.
-				   Not available on Linux???  */
-#define	MAP_HASSEMPHORE	0x0000	/* Region may contain semaphores.
-				   Not available on Linux???  */
-#define	MAP_INHERIT	0x0000	/* Region is retained after exec.
-				   Not available on Linux???  */
-
-/* Advice to `madvise'.  */
-#define	MADV_NORMAL	0	/* No further special treatment.  */
-#define	MADV_RANDOM	1	/* Expect random page references.  */
-#define	MADV_SEQUENTIAL	2	/* Expect sequential page references.  */
-#define	MADV_WILLNEED	3	/* Will need these pages.  */
-#define	MADV_DONTNEED	4	/* Don't need these pages.  */
-
-/* Flags to `mlockall'.  */
-#define MCL_CURRENT     1	/* Lock all current mappings.  */
-#define MCL_FUTURE      2	/* Lock all future mappings.  */
-
 #include <sys/cdefs.h>
 
+/* Get the bit values from the kernel header file.  */
+#include <linux/mman.h>
+
 __BEGIN_DECLS
 /* Map addresses starting near ADDR and extending for LEN bytes.  from
    OFFSET into the file FD describes according to PROT and FLAGS.  If ADDR