newlib-cygwin/newlib/libc/argz/envz_remove.c

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/* Copyright (C) 2002 by Red Hat, Incorporated. All rights reserved.
*
* Permission to use, copy, modify, and distribute this software
* is freely granted, provided that this notice is preserved.
*/
#include <errno.h>
#include <sys/types.h>
#include <string.h>
#include <stdlib.h>
#include <argz.h>
#include <envz.h>
void
envz_remove(char **envz, size_t *envz_len, const char *name)
{
char *entry = NULL;
int len = 0;
entry = envz_entry (*envz, *envz_len, name);
if (entry)
{
len = strlen(entry) + 1;
/* Not the last entry. */
if (*envz + *envz_len != entry + len - 1)
{
memmove(entry, entry + len, *envz + *envz_len - entry - len);
}
*envz = (char *)realloc(*envz, *envz_len - len);
*envz_len -= len;
}
}