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

46 lines
1.0 KiB
C

/* 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 <envz.h>
#include "buf_findstr.h"
char *
envz_entry (const char *envz,
size_t envz_len,
const char *name)
{
char *buf_ptr = (char *)envz;
size_t buf_len = envz_len;
while(buf_len)
{
if (_buf_findstr(name, &buf_ptr, &buf_len))
{
if (buf_ptr)
{
if (*buf_ptr == '=' || *buf_ptr == '\0')
{
buf_ptr--;
/* Move buf_ptr back to start of entry. */
while(*buf_ptr != '\0' && buf_ptr != envz) buf_ptr--;
if(*buf_ptr == '\0')
buf_ptr++;
return (char *)buf_ptr;
}
}
}
}
return 0;
}