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e701e381 LDM |
1 | /* |
2 | * Copyright (C) 2012 ProFUSION embedded systems | |
3 | * | |
4 | * This program is free software: you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation, either version 2 of the License, or | |
7 | * (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 | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
16 | */ | |
17 | ||
68cc4493 LDM |
18 | #include <errno.h> |
19 | #include <dlfcn.h> | |
20 | #include <sys/utsname.h> | |
21 | #include <stdlib.h> | |
22 | #include <string.h> | |
23 | #include <stdio.h> | |
24 | ||
25 | #include "testsuite.h" | |
26 | ||
27 | TS_EXPORT int uname(struct utsname *u) | |
28 | { | |
29 | static void *nextlib = NULL; | |
30 | static int (*nextlib_uname)(struct utsname *u); | |
31 | const char *release = getenv(S_TC_UNAME_R); | |
32 | int err; | |
33 | size_t sz; | |
34 | ||
35 | if (release == NULL) { | |
36 | fprintf(stderr, "TRAP uname(): missing export %s?\n", | |
37 | S_TC_UNAME_R); | |
38 | errno = EFAULT; | |
39 | return -1; | |
40 | } | |
41 | ||
42 | if (nextlib == NULL) { | |
43 | #ifdef RTLD_NEXT | |
44 | nextlib = RTLD_NEXT; | |
45 | #else | |
46 | nextlib = dlopen("libc.so.6", RTLD_LAZY); | |
47 | #endif | |
48 | nextlib_uname = dlsym(nextlib, "uname"); | |
49 | } | |
50 | ||
51 | err = nextlib_uname(u); | |
52 | if (err < 0) | |
53 | return err; | |
54 | ||
55 | sz = strlen(release) + 1; | |
56 | if (sz > sizeof(u->release)) { | |
57 | fprintf(stderr, "uname(): sizeof release (%s) " | |
d3f159bb | 58 | "is greater than available space: %zu", |
68cc4493 LDM |
59 | release, sizeof(u->release)); |
60 | errno = -EFAULT; | |
61 | return -1; | |
62 | } | |
63 | ||
64 | memcpy(u->release, release, sz); | |
65 | return 0; | |
66 | } |