update from main archive 961126 cvs/libc-961127

Wed Nov 27 06:10:10 1996  Ulrich Drepper  <drepper@cygnus.com>

	* Makefile: Fix typo.

	* configure: Require autoconf-2.11.

	* elf/dl-deps.c: Terminate duplicate list.

	* libio/libio.h: Add prototypes for _IO_seekoff and _IO_seekpos.
	* libio/strfile.h: Update from current libg++.
	* libio/strops.c: Likewise.

	* login/Makefile (routines): Update after correction of reentrant
	interface.
	* login/endutent.c: Removed.
	* login/endutent_r.c: Likewise.
	* login/pututline.c: Likewise.
	* login/pututline_r.c: Likewise.
	* login/setutent.c: Likewise.
	* login/setutent_r.c: Likewise.
	* login/getutent.c: Update for new interface.
	* login/getutent_r.c: Likewise.
	* login/getutid.c: Likewise.
	* login/getutid_r.c: Likewise.
	* login/getutline.c: Likewise.
	* login/getutline_r.c: Likewise.
	* login/login.c: Likewise.
	* login/logout.c: Likewise.
	* login/logwtmp.c: Likewise.
	* login/utmp.h: Likewise.
	* sysdeps/unix/getlogin.c: Likewise.
	* sysdeps/unix/getlogin_r.c: Likewise.
	* login/utmp-private.h: New private header.
	* login/utmp_db.c: Stub DB backend for utmp handler.
	* login/utmp_file.c: File backend for utmp handler.
	* sysdeps/gnu/utmpbits.h (struct utmp): Add some more fields.
	(enum utlogin): List of record types.
	(struct exit_status): Record to align with other implementations.

	* sysdeps/generic/paths.h: Add _PATH_UTMP_DB.
	* sysdeps/unix/sysv/linux/paths.h: Likewise.

	* sysdeps/generic/pty.c: Use getgrnam_r instead of getgrnam.

	* sysdeps/stub/getlogin.c: Update copyright.
	* sysdeps/stub/getlogin_r.c: Likewise.

	* nss/getXXbyYY_r.c: Use -1l for error-pointer value instead of -1.
	* nss/getXXent_r.c: Likewise.
	* nss/nsswitch.c: Likewise.

	* posix/Makefile (headers): Add wait.h.
	* posix/wait.h: New file.

	* posix/sys/types.h: Always define intN_t types.

	* stdio-common/Makefile: Update copyright.
	Use -Wno-format flag for scanf4.c and scanf7.c.

	* stdlib/stdlib.h: Reformat.

	* time/africa: Update from ADO tzdata1996m.
	* time/antarctica: Likewise.
	* time/asia: Likewise.
	* time/australia: Likewise.
	* time/etcetera: Likewise.
	* time/europe: Likewise.
	* time/northamerica: Likewise.
	* time/southamerica: Likewise.
	* time/zone.tab: Likewise.

Fri Nov 22 19:34:12 1996  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/posix/getcwd.c (__getcwd): After resizing the buffer
	move the current contents to the end and relocate file name
	pointer to upper half of the buffer.

Sun Nov 24 04:56:19 1996  Ulrich Drepper  <drepper@cygnus.com>

	* time/africa: Update from ADO tzdata1996m.
	* time/antarctica: Likewise.
	* time/asia: Likewise.
	* time/australia: Likewise.
	* time/etcetera: Likewise.
	* time/europe: Likewise.
	* time/nothamerica: Likewise.
	* time/southameria: Likewise.
	* time/zone.tab: Likewise.

	* sysdeps/unix/sysv/linux/sys/serial.h: New file.
	* sysdeps/unix/sysv/linux/Makefile [$(subdir)=misc] (sysdep_headers):
	Add sys/serial.h.
	* sysdeps/unix/sysv/linux/Dist: Add sys/serial.h.

	* posix/wait.h: New file.
	* posix/Makefile (headers): Add wait.h.

Sat Nov 23 17:27:52 1996  Roland McGrath  <roland@gnu.ai.mit.edu>

	* Makeconfig ($(common-objpfx)soversions.mk): Use regular
	expression instead of shell pattern matching.
	* shlib-versions: Change to regular expressions.

Sat Nov 23 13:24:55 1996  Ulrich Drepper  <drepper@cygnus.com>

	* io/stat.c: Add section from libgcc to copyright comment
	to allow this file to be statically linked in applications.
	* io/fstat.c: Likewise.
	* io/lstat.c: Likewise.
	* io/mknod.c: Likewise.

Fri Nov 22 15:14:23 1996  Ulrich Drepper  <drepper@cygnus.com>

	* csu/initfini.c: Add section from libgcc to copyright comment
	to allow this file to be statically linked in applications.

	* malloc/obstack.h [!_LIBC && !HAVE_STRING_H]: Define memcpy if
	not already defined.
	(obstack_grow, obstack_grow0): Correct placement of braces.

	* gnu-versions.h (_GNU_OBSTACK_INTERFACE_VERSION): Define to 2.
	* malloc/obstack.c (OBSTACK_INTERFACE_VERSION): Define to 2.

Thu Nov 21 19:54:51 1996  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* Makerules (make-link): Simplify by changing directory only if
	not using rellns-sh; check whether we really have symbolic links.

	* rellns-sh: Fix the case of $(dirname $2) being a prefix of
	$(dirname $1); use status of ln for exit code; make more robust
	against multiple slashes in a row.

Thu Nov 21 13:05:21 1996  Thomas Bushnell, n/BSG  <thomas@gnu.ai.mit.edu>

	* configure.in (after AC_CANONICAL_HOST): mutate *-*-gnu* names
	into *-*-gnu-gnu*.
	* shlib-versions (gnu versions): Recognize *-*-gnu-gnu* instead of
	the three-part name, to distinguish correctly from *-*-linux-gnu*.

	* sysdeps/mach/hurd/Makefile ($(libdir)/libc.so): Depend on
	$(rpcuserlibs).

	* sysdeps/mach/hurd/Makefile (install-others): Add
	$(libdir)/libc_p.a.
	($(libdir)/libc_p.a): New rule.
	* sysdeps/mach/hurd/libc_p-ldscript: New file.
	* sysdeps/mach/hurd/Dist: Add libc_p-ldscript.

Wed Nov 20 20:28:21 1996  Richard Henderson  <rth@tamu.edu>

	* Makerules (make-link): Use $(shell) to find rellns-sh before we cd.
	* time/Makefile: Likewise.

	* sysdeps/alpha/elf/Makefile: New file.  Build crtbegin.o & crtend.o.
	* sysdeps/alpha/elf/Dist: New file.
	* sysdeps/alpha/elf/crtbegin.S, sysdeps/alpha/elf/crtend.S: New files.
	The bits currently distributed with GCC fail in two ways -- they don't
	understand multiple .got subsections and the extents of the lists are
	dynamicly bound meaning that the application's lists get executed
	multiple times and the library's lists never get executed.

Wed Nov 20 00:42:45 1996  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* stdlib/strtod.c: Fix previous change.

Wed Nov 20 22:07:58 1996  Andreas Jaeger  <aj@arthur.pfalz.de>

	* time/Makefile ($(installed-localtime-file)): Use $(..) to find
	rellns-sh script.

Wed Nov 20 12:50:54 1996  Ulrich Drepper  <drepper@cygnus.com>

	* stdio-common/Makefile: Add CFLAGS-scanf7.c to prevent warning.
	Likesie for scanf4.c

1 files changed, 62 insertions, 57 deletions

diff --git a/libio/strops.c b/libio/strops.c
index 464063322d..8a6c56d055 100644
--- a/libio/strops.c
+++ b/libio/strops.c
@@ -26,7 +26,31 @@ the executable file might be covered by the GNU General Public License. */
 #include "libioP.h"
 #include <string.h>
 
-#define LEN(fp) (((_IO_strfile*)(fp))->_s._len)
+#if 0
+/* The following definitions are for exposition only.
+   They map the terminlogy used in the ANSI/ISO C++ draft standard
+   to the implementation. */
+
+/* allocated:  set  when a dynamic array object has been allocated, and
+   hence should be freed by the destructor for the strstreambuf object. */
+#define ALLOCATED(FP) ((FP)->_f._IO_buf_base && DYNAMIC(FP))
+
+/* constant:  set when the array object has const elements,
+   so the output sequence cannot be written. */
+#define CONSTANT(FP) ((FP)->_f._IO_file_flags & _IO_NO_WRITES)
+
+/* alsize:  the suggested minimum size for a dynamic array object. */
+#define ALSIZE(FP) ??? /* not stored */
+
+/* palloc: points to the function to call to allocate a dynamic array object.*/
+#define PALLOC(FP) \
+  ((FP)->_s._allocate_buffer == default_alloc ? 0 : (FP)->_s._allocate_buffer)
+
+/* pfree: points  to  the  function  to call to free a dynamic array object. */
+#define PFREE(FP) \
+  ((FP)->_s._free_buffer == default_free ? 0 : (FP)->_s._free_buffer)
+
+#endif
 
 #ifdef TODO
 /* An "unbounded buffer" is when a buffer is supplied, but with no
@@ -44,27 +68,17 @@ DEFUN(_IO_str_init_static, (fp, ptr, size, pstart),
     {
       /* If size is negative 'the characters are assumed to
 	 continue indefinitely.'  This is kind of messy ... */
-#if 1
       int s;
       size = 512;
-      /* Try increasing powers of 2, as long as we don't wrap around.
-	 This can lose in pathological cases (ptr near the end
-	 of the address space).  A better solution might be to
-	 adjust the size on underflow/overflow.  FIXME. */
-      for ( ; s = 2*size, s > 0 && ptr + s > ptr && s < 0x4000000L; )
+      /* Try increasing powers of 2, as long as we don't wrap around. */
+      for (; s = 2*size, s > 0 && ptr + s > ptr && s < 0x4000000L; )
 	size = s;
-      size = s;
-#else
-      /* The following semi-portable kludge assumes that
-	 sizeof(unsigned long) == sizeof(char*). Hence,
-	 (unsigned long)(-1) should be the largest possible address. */
-      unsigned long highest = (unsigned long)(-1);
-      /* Pointers are signed on some brain-damaged systems, in
-	 which case we divide by two to get the maximum signed address. */
-      if  ((char*)highest < ptr)
-	highest >>= 1;
-      size = (char*)highest - ptr;
-#endif
+      /* Try increasing size as much as we can without wrapping around. */
+      for (s = size >> 1; s > 0; s >>= 1)
+	{
+	  if (ptr + size + s > ptr)
+	    size += s;
+	}
     }
   _IO_setb(fp, ptr, ptr+size, 0);
 
@@ -83,7 +97,6 @@ DEFUN(_IO_str_init_static, (fp, ptr, size, pstart),
       fp->_IO_write_end = ptr;
       fp->_IO_read_end = ptr+size;
     }
-  LEN(fp) = size;
   /* A null _allocate_buffer function flags the strfile as being static. */
   (((_IO_strfile*)(fp))->_s._allocate_buffer) =  (_IO_alloc_type)0;
 }
@@ -101,34 +114,25 @@ DEFUN(_IO_str_overflow, (fp, c),
       register _IO_FILE* fp AND int c)
 {
   int flush_only = c == EOF;
-  _IO_size_t pos = fp->_IO_write_ptr - fp->_IO_write_base;
-  _IO_size_t get_pos = fp->_IO_read_ptr - fp->_IO_read_base;
+  _IO_size_t pos;
   if (fp->_flags & _IO_NO_WRITES)
       return flush_only ? 0 : EOF;
-  if (pos > LEN(fp)) LEN(fp) = pos;
   if ((fp->_flags & _IO_TIED_PUT_GET) && !(fp->_flags & _IO_CURRENTLY_PUTTING))
     {
-      pos = get_pos;
       fp->_flags |= _IO_CURRENTLY_PUTTING;
-      get_pos = LEN(fp);
+      fp->_IO_write_ptr = fp->_IO_read_ptr;
+      fp->_IO_read_ptr = fp->_IO_read_end;
     }
-  if (pos >= (_IO_size_t) (_IO_blen(fp) + flush_only))
+  pos =  fp->_IO_write_ptr - fp->_IO_write_base;
+  if (pos >= _IO_blen(fp) + flush_only)
     {
       if (fp->_flags & _IO_USER_BUF) /* not allowed to enlarge */
-	{
-#ifdef TODO
-	  if (indefinite size)
-	    {
-	      fp->_IO_buf_end += 512;
-	    }
-	  else
-#endif
-	  return EOF;
-	}
+	return EOF;
       else
 	{
 	  char *new_buf;
-	  _IO_size_t new_size = 2 * _IO_blen(fp);
+	  char *old_buf = fp->_IO_buf_base;
+	  _IO_size_t new_size = 2 * _IO_blen(fp) + 100;
 	  new_buf
 	    = (char*)(*((_IO_strfile*)fp)->_s._allocate_buffer)(new_size);
 	  if (new_buf == NULL)
@@ -136,31 +140,32 @@ DEFUN(_IO_str_overflow, (fp, c),
 	      /*	  __ferror(fp) = 1; */
 	      return EOF;
 	    }
-	  memcpy(new_buf, fp->_IO_buf_base, _IO_blen(fp));
-#if 0
-	  if (lenp == &LEN(fp)) /* use '\0'-filling */
-	      memset(new_buf + pos, 0, blen() - pos);
-#endif
 	  if (fp->_IO_buf_base)
 	    {
+	      memcpy(new_buf, old_buf, _IO_blen(fp));
 	      (*((_IO_strfile*)fp)->_s._free_buffer)(fp->_IO_buf_base);
 	      /* Make sure _IO_setb won't try to delete _IO_buf_base. */
 	      fp->_IO_buf_base = NULL;
 	    }
+#if 0
+	  if (lenp == &LEN(fp)) /* use '\0'-filling */
+	      memset(new_buf + pos, 0, blen() - pos);
+#endif
 	  _IO_setb(fp, new_buf, new_buf + new_size, 1);
+	  fp->_IO_read_base = new_buf + (fp->_IO_read_base - old_buf);
+	  fp->_IO_read_ptr = new_buf + (fp->_IO_read_ptr - old_buf);
+	  fp->_IO_read_end = new_buf + (fp->_IO_read_end - old_buf);
+	  fp->_IO_write_ptr = new_buf + (fp->_IO_write_ptr - old_buf);
+
 	  fp->_IO_write_base = new_buf;
+	  fp->_IO_write_end = fp->_IO_buf_end;
 	}
-      fp->_IO_write_end = fp->_IO_buf_end;
     }
 
-  fp->_IO_write_ptr = fp->_IO_buf_base + pos;
-
-  fp->_IO_read_base = fp->_IO_buf_base;
-  fp->_IO_read_ptr = fp->_IO_buf_base + get_pos;
-  fp->_IO_read_end = fp->_IO_buf_base + LEN(fp);
-
   if (!flush_only)
     *fp->_IO_write_ptr++ = (unsigned char) c;
+  if (fp->_IO_write_ptr > fp->_IO_read_end)
+    fp->_IO_read_end = fp->_IO_write_ptr;
   return c;
 }
 
@@ -168,28 +173,29 @@ int
 DEFUN(_IO_str_underflow, (fp),
       register _IO_FILE* fp)
 {
-  _IO_size_t ppos = fp->_IO_write_ptr - fp->_IO_write_base;
-  if (ppos > LEN(fp)) LEN(fp) = ppos;
+  if (fp->_IO_write_ptr > fp->_IO_read_end)
+    fp->_IO_read_end = fp->_IO_write_ptr;
   if ((fp->_flags & _IO_TIED_PUT_GET) && (fp->_flags & _IO_CURRENTLY_PUTTING))
     {
       fp->_flags &= ~_IO_CURRENTLY_PUTTING;
+      fp->_IO_read_ptr = fp->_IO_write_ptr;
       fp->_IO_write_ptr = fp->_IO_write_end;
     }
-  fp->_IO_read_end = fp->_IO_read_base + LEN(fp);
   if (fp->_IO_read_ptr < fp->_IO_read_end)
     return *fp->_IO_read_ptr;
   else
     return EOF;
 }
 
+/* The size of the valid part of the buffer.  */
+
 _IO_ssize_t
 DEFUN(_IO_str_count, (fp),
       register _IO_FILE *fp)
 {
-  _IO_ssize_t put_len = fp->_IO_write_ptr - fp->_IO_write_base;
-  if (put_len < (_IO_ssize_t) LEN(fp))
-    put_len = LEN(fp);
-  return put_len;
+  return (fp->_IO_write_ptr > fp->_IO_read_end ? fp->_IO_write_ptr
+	  : fp->_IO_read_end)
+    - fp->_IO_read_base;
 }
 
 _IO_pos_t
@@ -236,7 +242,6 @@ DEFUN(_IO_str_seekoff, (fp, offset, dir, mode),
 	}
       if (offset < 0 || (_IO_ssize_t)offset > cur_size)
 	return EOF;
-      LEN(fp) = cur_size;
       fp->_IO_write_ptr = fp->_IO_write_base + offset;
       new_pos = offset;
     }