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/*
* Copyright (C) 2012-2013 ProFUSION embedded systems
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include <dlfcn.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/utsname.h>
#include "testsuite.h"
TS_EXPORT int uname(struct utsname *u)
{
static void *nextlib = NULL;
static int (*nextlib_uname)(struct utsname *u);
const char *release;
int err;
size_t sz;
if (nextlib == NULL) {
#ifdef RTLD_NEXT
nextlib = RTLD_NEXT;
#else
nextlib = dlopen("libc.so.6", RTLD_LAZY);
#endif
nextlib_uname = dlsym(nextlib, "uname");
}
err = nextlib_uname(u);
if (err < 0)
return err;
if (!environ)
/*
* probably called from within glibc before main(); unsafe
* to call getenv()
*/
return 0;
release = getenv(S_TC_UNAME_R);
if (release == NULL) {
fprintf(stderr, "TRAP uname(): missing export %s?\n",
S_TC_UNAME_R);
return 0;
}
sz = strlen(release) + 1;
if (sz > sizeof(u->release)) {
fprintf(stderr, "uname(): sizeof release (%s) "
"is greater than available space: %zu",
release, sizeof(u->release));
errno = -EFAULT;
return -1;
}
memcpy(u->release, release, sz);
return 0;
}
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