libc/newlib/libc/argz/envz_get.c

41 lines
915 B
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>
extern int buf_findstr(const char *str, char **buf, size_t *buf_len);
char *
envz_get (const char *envz, size_t envz_len, const char *name)
{
const char *buf_ptr = envz;
size_t buf_len = envz_len;
while(buf_len)
{
if (buf_findstr(name, &buf_ptr, &buf_len))
{
if (*buf_ptr == '=')
{
buf_ptr++;
return buf_ptr;
}
else
{
if (*buf_ptr == '\0')
/* NULL entry. */
return NULL;
}
}
}
/* No matching entries found. */
return NULL;
}