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| 1 | /* Optional code to distinguish library flavours. |
|---|---|
| 2 | Copyright (C) 1998-2022 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, see |
| 17 | <https://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #ifndef _DL_LIBRECON_H |
| 20 | |
| 21 | #include <sysdeps/unix/sysv/linux/dl-librecon.h> |
| 22 | |
| 23 | #define DISTINGUISH_LIB_VERSIONS \ |
| 24 | do \ |
| 25 | { \ |
| 26 | /* We have to find out whether the binary is linked against \ |
| 27 | libc 5 or glibc. We do this by looking at all the DT_NEEDED \ |
| 28 | entries. If one is libc.so.5 this is a libc 5 linked binary. */ \ |
| 29 | if (main_map->l_info[DT_NEEDED]) \ |
| 30 | { \ |
| 31 | /* We have dependencies. */ \ |
| 32 | const ElfW(Dyn) *d; \ |
| 33 | const char *strtab; \ |
| 34 | \ |
| 35 | strtab = (const char *) D_PTR (main_map, l_info[DT_STRTAB]); \ |
| 36 | \ |
| 37 | for (d = main_map->l_ld; d->d_tag != DT_NULL; ++d) \ |
| 38 | if (d->d_tag == DT_NEEDED \ |
| 39 | && strcmp (strtab + d->d_un.d_val, "libc.so.5") == 0) \ |
| 40 | break; \ |
| 41 | \ |
| 42 | /* We print a `5' or `6' depending on the outcome. */ \ |
| 43 | _dl_printf (d->d_tag != DT_NULL ? "5\n" : "6\n"); \ |
| 44 | } \ |
| 45 | } \ |
| 46 | while (0) |
| 47 | |
| 48 | /* Recognizing extra environment variables. */ |
| 49 | #define EXTRA_LD_ENVVARS \ |
| 50 | case 15: \ |
| 51 | if (memcmp (envline, "LIBRARY_VERSION", 15) == 0) \ |
| 52 | GLRO(dl_correct_cache_id) = envline[16] == '5' ? 2 : 3; \ |
| 53 | break; \ |
| 54 | |
| 55 | /* Extra unsecure variables. The names are all stuffed in a single |
| 56 | string which means they have to be terminated with a '\0' explicitly. */ |
| 57 | #define EXTRA_UNSECURE_ENVVARS \ |
| 58 | "LD_AOUT_LIBRARY_PATH\0" \ |
| 59 | "LD_AOUT_PRELOAD\0" |
| 60 | |
| 61 | #endif /* dl-librecon.h */ |
| 62 |
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