Remove unnecessary setenv() replacement function

- setenv() and unsetenv() are required by POSIX 2001, we dont care about
  older systems

2 files changed, 1 insertions, 318 deletions

diff --git a/misc/Makefile.am b/misc/Makefile.am
index a45631306..52ab1e47d 100644
--- a/misc/Makefile.am
+++ b/misc/Makefile.am
@@ -8,7 +8,7 @@ EXTRA_DIST = \
 	fakefork.c	fnmatch.c	fnmatch.h \
 	getcwd.c	getmntent.c	\
 	getwd.c		glob.c		glob.h		\
-	realpath.c	setenv.c	stpcpy.c	stpncpy.c
+	realpath.c	stpcpy.c	stpncpy.c
 
 noinst_LTLIBRARIES = libmisc.la
 
diff --git a/misc/setenv.c b/misc/setenv.c
deleted file mode 100644
index daf1e02f4..000000000
--- a/misc/setenv.c
+++ /dev/null
@@ -1,317 +0,0 @@
-/* Copyright (C) 1992, 95, 96, 97, 98, 99 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Library General Public License as
-   published by the Free Software Foundation; either version 2 of the
-   License, or (at your option) any later version.
-
-   The GNU C Library 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
-   Library General Public License for more details.
-
-   You should have received a copy of the GNU Library General Public
-   License along with the GNU C Library; see the file COPYING.LIB.  If not,
-   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
-
-# include "system.h"
-
-#include <errno.h>
-#if !_LIBC
-# if !defined errno && !defined HAVE_ERRNO_DECL
-extern int errno;
-# endif
-# define __set_errno(ev) ((errno) = (ev))
-#endif
-
-#if _LIBC || HAVE_STDLIB_H
-# include <stdlib.h>
-#endif
-#if _LIBC || HAVE_STRING_H
-# include <string.h>
-#endif
-#if _LIBC || HAVE_UNISTD_H
-# include <unistd.h>
-#endif
-
-#if !_LIBC
-# define __environ	environ
-# ifndef HAVE_ENVIRON_DECL
-extern char **environ;
-# endif
-#endif
-
-#if _LIBC
-/* This lock protects against simultaneous modifications of `environ'.  */
-# include <bits/libc-lock.h>
-__libc_lock_define_initialized (static, envlock)
-# define LOCK	__libc_lock_lock (envlock)
-# define UNLOCK	__libc_lock_unlock (envlock)
-#else
-# define LOCK
-# define UNLOCK
-#endif
-
-/* In the GNU C library we must keep the namespace clean.  */
-#ifdef _LIBC
-# define setenv __setenv
-# define unsetenv __unsetenv
-# define clearenv __clearenv
-# define tfind __tfind
-# define tsearch __tsearch
-#endif
-
-/* In the GNU C library implementation we try to be more clever and
-   allow arbitrarily many changes of the environment given that the used
-   values are from a small set.  Outside glibc this will eat up all
-   memory after a while.  */
-#if defined _LIBC || (defined HAVE_SEARCH_H && defined HAVE_TSEARCH \
-		      && defined __GNUC__)
-# define USE_TSEARCH	1
-# include <search.h>
-
-/* This is a pointer to the root of the search tree with the known
-   values.  */
-static void *known_values;
-
-# define KNOWN_VALUE(Str) \
-  ({									      \
-    void *value = tfind (Str, &known_values, (__compar_fn_t) strcmp);	      \
-    value != NULL ? *(char **) value : NULL;				      \
-  })
-# define STORE_VALUE(Str) \
-  tsearch (Str, &known_values, (__compar_fn_t) strcmp)
-
-#else
-# undef USE_TSEARCH
-
-# define KNOWN_VALUE(Str) NULL
-# define STORE_VALUE(Str) do { } while (0)
-
-#endif
-
-
-/* If this variable is not a null pointer we allocated the current
-   environment.  */
-static char **last_environ;
-
-
-/* This function is used by `setenv' and `putenv'.  The difference between
-   the two functions is that for the former must create a new string which
-   is then placed in the environment, while the argument of `putenv'
-   must be used directly.  This is all complicated by the fact that we try
-   to reuse values once generated for a `setenv' call since we can never
-   free the strings.  */
-static int
-__add_to_environ (const char *name, const char *value, const char *combined,
-	int replace)
-{
-  register char **ep;
-  register size_t size;
-  const size_t namelen = strlen (name);
-  const size_t vallen = value != NULL ? strlen (value) + 1 : 0;
-
-  LOCK;
-
-  /* We have to get the pointer now that we have the lock and not earlier
-     since another thread might have created a new environment.  */
-  ep = __environ;
-
-  size = 0;
-  if (ep != NULL)
-    {
-      for (; *ep != NULL; ++ep)
-	if (!strncmp (*ep, name, namelen) && (*ep)[namelen] == '=')
-	  break;
-	else
-	  ++size;
-    }
-
-  if (ep == NULL || *ep == NULL)
-    {
-      char **new_environ;
-#ifdef USE_TSEARCH
-      char *new_value;
-#endif
-
-      /* We allocated this space; we can extend it.  */
-      new_environ = (char **) realloc (last_environ,
-				       (size + 2) * sizeof (char *));
-      if (new_environ == NULL)
-	{
-	  UNLOCK;
-	  return -1;
-	}
-
-      /* If the whole entry is given add it.  */
-      if (combined != NULL)
-	/* We must not add the string to the search tree since it belongs
-	   to the user.  */
-	new_environ[size] = (char *) combined;
-      else
-	{
-	  /* See whether the value is already known.  */
-#ifdef USE_TSEARCH
-	  new_value = (char *) alloca (namelen + 1 + vallen);
-# ifdef _LIBC
-	  __mempcpy (__mempcpy (__mempcpy (new_value, name, namelen), "=", 1),
-		     value, vallen);
-# else
-	  memcpy (new_value, name, namelen);
-	  new_value[namelen] = '=';
-	  memcpy (&new_value[namelen + 1], value, vallen);
-# endif
-
-	  new_environ[size] = KNOWN_VALUE (new_value);
-	  if (new_environ[size] == NULL)
-#endif
-	    {
-	      new_environ[size] = (char *) malloc (namelen + 1 + vallen);
-	      if (new_environ[size] == NULL)
-		{
-		  __set_errno (ENOMEM);
-		  UNLOCK;
-		  return -1;
-		}
-
-#ifdef USE_TSEARCH
-	      memcpy (new_environ[size], new_value, namelen + 1 + vallen);
-#else
-	      memcpy (new_environ[size], name, namelen);
-	      new_environ[size][namelen] = '=';
-	      memcpy (&new_environ[size][namelen + 1], value, vallen);
-#endif
-	      /* And save the value now.  We cannot do this when we remove
-		 the string since then we cannot decide whether it is a
-		 user string or not.  */
-	      STORE_VALUE (new_environ[size]);
-	    }
-	}
-
-      if (__environ != last_environ)
-	memcpy ((char *) new_environ, (char *) __environ,
-		size * sizeof (char *));
-
-      new_environ[size + 1] = NULL;
-
-      last_environ = __environ = new_environ;
-    }
-  else if (replace)
-    {
-      char *np;
-
-      /* Use the user string if given.  */
-      if (combined != NULL)
-	np = (char *) combined;
-      else
-	{
-#ifdef USE_TSEARCH
-	  char *new_value = alloca (namelen + 1 + vallen);
-# ifdef _LIBC
-	  __mempcpy (__mempcpy (__mempcpy (new_value, name, namelen), "=", 1),
-		     value, vallen);
-# else
-	  memcpy (new_value, name, namelen);
-	  new_value[namelen] = '=';
-	  memcpy (&new_value[namelen + 1], value, vallen);
-# endif
-
-	  np = KNOWN_VALUE (new_value);
-	  if (np == NULL)
-#endif
-	    {
-	      np = malloc (namelen + 1 + vallen);
-	      if (np == NULL)
-		{
-		  UNLOCK;
-		  return -1;
-		}
-
-#ifdef USE_TSEARCH
-	      memcpy (np, new_value, namelen + 1 + vallen);
-#else
-	      memcpy (np, name, namelen);
-	      np[namelen] = '=';
-	      memcpy (&np[namelen + 1], value, vallen);
-#endif
-	      /* And remember the value.  */
-	      STORE_VALUE (np);
-	    }
-	}
-
-      *ep = np;
-    }
-
-  UNLOCK;
-
-  return 0;
-}
-
-int
-setenv (name, value, replace)
-     const char *name;
-     const char *value;
-     int replace;
-{
-  return __add_to_environ (name, value, NULL, replace);
-}
-
-void
-unsetenv (name)
-     const char *name;
-{
-  const size_t len = strlen (name);
-  char **ep;
-
-  LOCK;
-
-  ep = __environ;
-  while (*ep != NULL)
-    if (!strncmp (*ep, name, len) && (*ep)[len] == '=')
-      {
-	/* Found it.  Remove this pointer by moving later ones back.  */
-	char **dp = ep;
-
-	do
-	  dp[0] = dp[1];
-	while (*dp++);
-	/* Continue the loop in case NAME appears again.  */
-      }
-    else
-      ++ep;
-
-  UNLOCK;
-}
-
-/* The `clearenv' was planned to be added to POSIX.1 but probably
-   never made it.  Nevertheless the POSIX.9 standard (POSIX bindings
-   for Fortran 77) requires this function.  */
-int
-clearenv (void)
-{
-  LOCK;
-
-  if (__environ == last_environ && __environ != NULL)
-    {
-      /* We allocated this environment so we can free it.  */
-      free (__environ);
-      last_environ = NULL;
-    }
-
-  /* Clear the environment pointer removes the whole environment.  */
-  __environ = NULL;
-
-  UNLOCK;
-
-  return 0;
-}
-#ifdef _LIBC
-# undef setenv
-# undef unsetenv
-# undef clearenv
-weak_alias (__setenv, setenv)
-weak_alias (__unsetenv, unsetenv)
-weak_alias (__clearenv, clearenv)
-#endif