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