Dmitry V. Levin | 38a34c9 | 2015-12-17 17:56:48 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2015 Gleb Fotengauer-Malinovskiy <glebfm@altlinux.org> |
| 3 | * Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org> |
| 4 | * All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
| 9 | * 1. Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * 2. Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
| 14 | * 3. The name of the author may not be used to endorse or promote products |
| 15 | * derived from this software without specific prior written permission. |
| 16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | */ |
| 28 | |
Dmitry V. Levin | c633188 | 2015-08-28 08:43:57 +0000 | [diff] [blame] | 29 | #ifdef HAVE_CONFIG_H |
| 30 | # include "config.h" |
| 31 | #endif |
| 32 | |
| 33 | #include <stdio.h> |
Gleb Fotengauer-Malinovskiy | 3af6aab | 2015-08-14 17:49:27 +0200 | [diff] [blame] | 34 | #include <unistd.h> |
| 35 | #include <sys/syscall.h> |
| 36 | |
| 37 | int |
| 38 | main(void) |
| 39 | { |
| 40 | #ifdef __NR_readlink |
Dmitry V. Levin | c633188 | 2015-08-28 08:43:57 +0000 | [diff] [blame] | 41 | static const char fname[] = "readlink.link"; |
| 42 | unsigned char buf[31]; |
| 43 | long rc; |
| 44 | unsigned int i; |
Gleb Fotengauer-Malinovskiy | 3af6aab | 2015-08-14 17:49:27 +0200 | [diff] [blame] | 45 | |
Dmitry V. Levin | c633188 | 2015-08-28 08:43:57 +0000 | [diff] [blame] | 46 | rc = syscall(__NR_readlink, fname, buf, sizeof(buf)); |
| 47 | if (rc < 0) |
Gleb Fotengauer-Malinovskiy | 3af6aab | 2015-08-14 17:49:27 +0200 | [diff] [blame] | 48 | return 77; |
| 49 | |
Dmitry V. Levin | c633188 | 2015-08-28 08:43:57 +0000 | [diff] [blame] | 50 | printf("readlink(\""); |
| 51 | for (i = 0; fname[i]; ++i) |
| 52 | printf("\\x%02x", (int) (unsigned char) fname[i]); |
| 53 | printf("\", \""); |
| 54 | for (i = 0; i < 3; ++i) |
| 55 | printf("\\x%02x", (int) buf[i]); |
| 56 | printf("\"..., %zu) = %ld\n", sizeof(buf), rc); |
| 57 | |
| 58 | puts("+++ exited with 0 +++"); |
Gleb Fotengauer-Malinovskiy | 3af6aab | 2015-08-14 17:49:27 +0200 | [diff] [blame] | 59 | return 0; |
| 60 | #else |
| 61 | return 77; |
| 62 | #endif |
| 63 | } |