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/* go-setenv.c -- set the C environment from Go.
Copyright 2011 The Go Authors. All rights reserved.
Use of this source code is governed by a BSD-style
license that can be found in the LICENSE file. */
#include "config.h"
#include <stddef.h>
#include <stdlib.h>
#include "go-alloc.h"
#include "go-string.h"
/* Set the C environment from Go. This is called by syscall.Setenv. */
void setenv_c (struct __go_string, struct __go_string)
__asm__ ("libgo_syscall.syscall.setenv_c");
void
setenv_c (struct __go_string k, struct __go_string v)
{
const unsigned char *ks;
unsigned char *kn;
const unsigned char *vs;
unsigned char *vn;
ks = k.__data;
kn = NULL;
vs = v.__data;
vn = NULL;
#ifdef HAVE_SETENV
if (ks[k.__length] != 0)
{
kn = __go_alloc (k.__length + 1);
__builtin_memcpy (kn, ks, k.__length);
ks = kn;
}
if (vs[v.__length] != 0)
{
vn = __go_alloc (v.__length + 1);
__builtin_memcpy (vn, vs, v.__length);
vs = vn;
}
setenv ((const char *) ks, (const char *) vs, 1);
#else /* !defined(HAVE_SETENV) */
kn = __go_alloc (k.__length + v.__length + 2);
__builtin_memcpy (kn, ks, k.__length);
kn[k.__length] = '=';
__builtin_memcpy (kn + k.__length + 1, vs, v.__length);
kn[k.__length + v.__length + 1] = '\0';
putenv ((char *) kn);
#endif /* !defined(HAVE_SETENV) */
if (kn != NULL)
__go_free (kn);
if (vn != NULL)
__go_free (vn);
}
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