1 /* 2 * Copyright (C) 2012-2013 ProFUSION embedded systems 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Lesser General Public 6 * License as published by the Free Software Foundation; either 7 * version 2.1 of the License, or (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Lesser General Public License for more details. 13 * 14 * You should have received a copy of the GNU Lesser General Public 15 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 16 */ 17 18 #include <dlfcn.h> 19 #include <errno.h> 20 #include <stdio.h> 21 #include <stdlib.h> 22 #include <string.h> 23 #include <unistd.h> 24 #include <sys/utsname.h> 25 26 #include "testsuite.h" 27 28 TS_EXPORT int uname(struct utsname *u) 29 { 30 static void *nextlib = NULL; 31 static int (*nextlib_uname)(struct utsname *u); 32 const char *release; 33 int err; 34 size_t sz; 35 36 if (nextlib == NULL) { 37 #ifdef RTLD_NEXT 38 nextlib = RTLD_NEXT; 39 #else 40 nextlib = dlopen("libc.so.6", RTLD_LAZY); 41 #endif 42 nextlib_uname = dlsym(nextlib, "uname"); 43 } 44 45 err = nextlib_uname(u); 46 if (err < 0) 47 return err; 48 49 if (!environ) 50 /* 51 * probably called from within glibc before main(); unsafe 52 * to call getenv() 53 */ 54 return 0; 55 56 release = getenv(S_TC_UNAME_R); 57 if (release == NULL) { 58 fprintf(stderr, "TRAP uname(): missing export %s?\n", 59 S_TC_UNAME_R); 60 return 0; 61 } 62 63 sz = strlen(release) + 1; 64 if (sz > sizeof(u->release)) { 65 fprintf(stderr, "uname(): sizeof release (%s) " 66 "is greater than available space: %zu", 67 release, sizeof(u->release)); 68 errno = -EFAULT; 69 return -1; 70 } 71 72 memcpy(u->release, release, sz); 73 return 0; 74 } 75
