1 /* 2 * Copyright (c) 2015 Dmitry V. Levin <ldv (at) altlinux.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #ifdef HAVE_CONFIG_H 29 # include "config.h" 30 #endif 31 32 #include <stdio.h> 33 #include <inttypes.h> 34 #include <unistd.h> 35 #include <sys/syscall.h> 36 37 #if defined __NR_sched_getattr && defined __NR_sched_setattr 38 39 int 40 main(void) 41 { 42 static union { 43 struct { 44 uint32_t size; 45 uint32_t sched_policy; 46 uint64_t sched_flags; 47 uint32_t sched_nice; 48 uint32_t sched_priority; 49 uint64_t sched_runtime; 50 uint64_t sched_deadline; 51 uint64_t sched_period; 52 } attr; 53 char buf[256]; 54 } sched; 55 56 if (syscall(__NR_sched_getattr, 0, &sched, sizeof(sched), 0)) 57 return 77; 58 59 printf("sched_getattr\\(0, \\{size=%u, sched_policy=SCHED_[A-Z]+, sched_flags=%s, sched_nice=%u, sched_priority=%u, sched_runtime=%" PRIu64 ", sched_deadline=%" PRIu64 ", sched_period=%" PRIu64 "\\}, 256, 0\\) += 0\n", 60 sched.attr.size, 61 sched.attr.sched_flags ? "SCHED_FLAG_RESET_ON_FORK" : "0", 62 sched.attr.sched_nice, 63 sched.attr.sched_priority, 64 sched.attr.sched_runtime, 65 sched.attr.sched_deadline, 66 sched.attr.sched_period); 67 68 sched.attr.sched_flags |= 1; 69 if (syscall(__NR_sched_setattr, 0, &sched, 0)) 70 return 77; 71 72 printf("sched_setattr\\(0, \\{size=%u, sched_policy=SCHED_[A-Z]+, sched_flags=%s, sched_nice=%u, sched_priority=%u, sched_runtime=%" PRIu64 ", sched_deadline=%" PRIu64 ", sched_period=%" PRIu64 "\\}, 0\\) += 0\n", 73 sched.attr.size, 74 "SCHED_FLAG_RESET_ON_FORK", 75 sched.attr.sched_nice, 76 sched.attr.sched_priority, 77 sched.attr.sched_runtime, 78 sched.attr.sched_deadline, 79 sched.attr.sched_period); 80 81 return 0; 82 } 83 84 #else 85 86 int 87 main(void) 88 { 89 return 77; 90 } 91 92 #endif 93
