1 files changed, 0 insertions, 65 deletions
diff --git a/src/port/unsetenv.c b/src/port/unsetenv.c
deleted file mode 100644
index 62b806d796c..00000000000
--- a/src/port/unsetenv.c
+++ /dev/null
@@ -1,65 +0,0 @@
-/*-------------------------------------------------------------------------
- *
- * unsetenv.c
- *	  unsetenv() emulation for machines without it
- *
- * Portions Copyright (c) 1996-2022, PostgreSQL Global Development Group
- * Portions Copyright (c) 1994, Regents of the University of California
- *
- *
- * IDENTIFICATION
- *	  src/port/unsetenv.c
- *
- *-------------------------------------------------------------------------
- */
-
-#include "c.h"
-
-
-int
-unsetenv(const char *name)
-{
-	char	   *envstr;
-
-	/* Error conditions, per POSIX */
-	if (name == NULL || name[0] == '\0' || strchr(name, '=') != NULL)
-	{
-		errno = EINVAL;
-		return -1;
-	}
-
-	if (getenv(name) == NULL)
-		return 0;				/* no work */
-
-	/*
-	 * The technique embodied here works if libc follows the Single Unix Spec
-	 * and actually uses the storage passed to putenv() to hold the environ
-	 * entry.  When we clobber the entry in the second step we are ensuring
-	 * that we zap the actual environ member.  However, there are some libc
-	 * implementations (notably recent BSDs) that do not obey SUS but copy the
-	 * presented string.  This method fails on such platforms.  Hopefully all
-	 * such platforms have unsetenv() and thus won't be using this hack. See:
-	 * http://www.greenend.org.uk/rjk/2008/putenv.html
-	 *
-	 * Note that repeatedly setting and unsetting a var using this code will
-	 * leak memory.
-	 */
-
-	envstr = (char *) malloc(strlen(name) + 2);
-	if (!envstr)				/* not much we can do if no memory */
-		return -1;
-
-	/* Override the existing setting by forcibly defining the var */
-	sprintf(envstr, "%s=", name);
-	if (putenv(envstr))
-		return -1;
-
-	/* Now we can clobber the variable definition this way: */
-	strcpy(envstr, "=");
-
-	/*
-	 * This last putenv cleans up if we have multiple zero-length names as a
-	 * result of unsetting multiple things.
-	 */
-	return putenv(envstr);
-}