Share gdb/environ.[ch] with gdbserver

We will need access to the environment functions when we share
fork_inferior between GDB and gdbserver, therefore we simply make the
API on gdb/environ.[ch] available on common/.  No extra adjustments
are needed to make it compile on gdbserver.

gdb/ChangeLog:
2017-03-07  Sergio Durigan Junior  <sergiodj@redhat.com>

	* Makefile.in (SFILES): Replace "environ.c" with
	"common/environ.c".
	(HFILES_NO_SRCDIR): Likewise, for "environ.h".
	* environ.c: Include "common-defs.h" instead of "defs.h.  Moved
	to...
	* common/environ.c: ... here.
	* environ.h: Moved to...
	* common/environ.h: ... here.

gdb/gdbserver/ChangeLog:
2017-03-07  Sergio Durigan Junior  <sergiodj@redhat.com>

	* Makefile.in (SFILES): Add "common/environ.c".
	(OBJS): Add "common/environ.h".

1 files changed, 0 insertions, 182 deletions

diff --git a/gdb/environ.c b/gdb/environ.c
deleted file mode 100644
index bfeabec..0000000
--- a/gdb/environ.c
+++ /dev/null
@@ -1,182 +0,0 @@
-/* environ.c -- library for manipulating environments for GNU.
-
-   Copyright (C) 1986-2017 Free Software Foundation, Inc.
-
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 3 of the License, or
-   (at your option) any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
-
-#include "defs.h"
-#include "environ.h"
-#include <algorithm>
-
-
-/* Return a new environment object.  */
-
-struct gdb_environ *
-make_environ (void)
-{
-  struct gdb_environ *e;
-
-  e = XNEW (struct gdb_environ);
-
-  e->allocated = 10;
-  e->vector = (char **) xmalloc ((e->allocated + 1) * sizeof (char *));
-  e->vector[0] = 0;
-  return e;
-}
-
-/* Free an environment and all the strings in it.  */
-
-void
-free_environ (struct gdb_environ *e)
-{
-  char **vector = e->vector;
-
-  while (*vector)
-    xfree (*vector++);
-
-  xfree (e->vector);
-  xfree (e);
-}
-
-/* Copy the environment given to this process into E.
-   Also copies all the strings in it, so we can be sure
-   that all strings in these environments are safe to free.  */
-
-void
-init_environ (struct gdb_environ *e)
-{
-  extern char **environ;
-  int i;
-
-  if (environ == NULL)
-    return;
-
-  for (i = 0; environ[i]; i++) /*EMPTY */ ;
-
-  if (e->allocated < i)
-    {
-      e->allocated = std::max (i, e->allocated + 10);
-      e->vector = (char **) xrealloc ((char *) e->vector,
-				      (e->allocated + 1) * sizeof (char *));
-    }
-
-  memcpy (e->vector, environ, (i + 1) * sizeof (char *));
-
-  while (--i >= 0)
-    {
-      int len = strlen (e->vector[i]);
-      char *newobj = (char *) xmalloc (len + 1);
-
-      memcpy (newobj, e->vector[i], len + 1);
-      e->vector[i] = newobj;
-    }
-}
-
-/* Return the vector of environment E.
-   This is used to get something to pass to execve.  */
-
-char **
-environ_vector (struct gdb_environ *e)
-{
-  return e->vector;
-}
-
-/* Return the value in environment E of variable VAR.  */
-
-char *
-get_in_environ (const struct gdb_environ *e, const char *var)
-{
-  int len = strlen (var);
-  char **vector = e->vector;
-  char *s;
-
-  for (; (s = *vector) != NULL; vector++)
-    if (strncmp (s, var, len) == 0 && s[len] == '=')
-      return &s[len + 1];
-
-  return 0;
-}
-
-/* Store the value in E of VAR as VALUE.  */
-
-void
-set_in_environ (struct gdb_environ *e, const char *var, const char *value)
-{
-  int i;
-  int len = strlen (var);
-  char **vector = e->vector;
-  char *s;
-
-  for (i = 0; (s = vector[i]) != NULL; i++)
-    if (strncmp (s, var, len) == 0 && s[len] == '=')
-      break;
-
-  if (s == 0)
-    {
-      if (i == e->allocated)
-	{
-	  e->allocated += 10;
-	  vector = (char **) xrealloc ((char *) vector,
-				       (e->allocated + 1) * sizeof (char *));
-	  e->vector = vector;
-	}
-      vector[i + 1] = 0;
-    }
-  else
-    xfree (s);
-
-  s = (char *) xmalloc (len + strlen (value) + 2);
-  strcpy (s, var);
-  strcat (s, "=");
-  strcat (s, value);
-  vector[i] = s;
-
-  /* This used to handle setting the PATH and GNUTARGET variables
-     specially.  The latter has been replaced by "set gnutarget"
-     (which has worked since GDB 4.11).  The former affects searching
-     the PATH to find SHELL, and searching the PATH to find the
-     argument of "symbol-file" or "exec-file".  Maybe we should have
-     some kind of "set exec-path" for that.  But in any event, having
-     "set env" affect anything besides the inferior is a bad idea.
-     What if we want to change the environment we pass to the program
-     without afecting GDB's behavior?  */
-
-  return;
-}
-
-/* Remove the setting for variable VAR from environment E.  */
-
-void
-unset_in_environ (struct gdb_environ *e, const char *var)
-{
-  int len = strlen (var);
-  char **vector = e->vector;
-  char *s;
-
-  for (; (s = *vector) != NULL; vector++)
-    {
-      if (strncmp (s, var, len) == 0 && s[len] == '=')
-	{
-	  xfree (s);
-	  /* Walk through the vector, shuffling args down by one, including
-	     the NULL terminator.  Can't use memcpy() here since the regions
-	     overlap, and memmove() might not be available.  */
-	  while ((vector[0] = vector[1]) != NULL)
-	    {
-	      vector++;
-	    }
-	  break;
-	}
-    }
-}