1d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes/* 2d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * Check decoding of getrlimit/ugetrlimit syscall. 3d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 4d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org> 5d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * All rights reserved. 6d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 7d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * Redistribution and use in source and binary forms, with or without 8d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * modification, are permitted provided that the following conditions 9d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * are met: 10d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 1. Redistributions of source code must retain the above copyright 11d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * notice, this list of conditions and the following disclaimer. 12d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 2. Redistributions in binary form must reproduce the above copyright 13d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * notice, this list of conditions and the following disclaimer in the 14d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * documentation and/or other materials provided with the distribution. 15d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 3. The name of the author may not be used to endorse or promote products 16d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * derived from this software without specific prior written permission. 17d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 18d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes */ 29d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 30d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#include <errno.h> 31d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#include <stdint.h> 32d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#include <stdio.h> 33d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#include <sys/resource.h> 34d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#include <unistd.h> 35d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 36d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#include "xlat.h" 37d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#include "xlat/resources.h" 38d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 39d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughesconst char * 40d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughessprint_rlim(kernel_ulong_t lim) 41d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes{ 42d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes if (sizeof(lim) == sizeof(uint64_t)) { 43d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes if (lim == (kernel_ulong_t) -1ULL) 44d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes return "RLIM64_INFINITY"; 45d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes } else { 46d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes if (lim == (kernel_ulong_t) -1U) 47d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes return "RLIM_INFINITY"; 48d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes } 49d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 50d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes static char buf[2][sizeof(lim)*3 + sizeof("*1024")]; 51d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes static int i; 52d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes i &= 1; 53d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes if (lim > 1024 && lim % 1024 == 0) 54d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes sprintf(buf[i], "%llu*1024", (unsigned long long) lim / 1024); 55d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes else 56d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes sprintf(buf[i], "%llu", (unsigned long long) lim); 57d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 58d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes return buf[i++]; 59d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes} 60d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 61d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#ifdef NR_GETRLIMIT 62d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 63d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughesint 64d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughesmain(void) 65d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes{ 66d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes kernel_ulong_t *const rlimit = tail_alloc(sizeof(*rlimit) * 2); 67d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes const struct xlat *xlat; 68d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 69d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes for (xlat = resources; xlat->str; ++xlat) { 70d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes unsigned long res = 0xfacefeed00000000ULL | xlat->val; 71d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes long rc = syscall(NR_GETRLIMIT, res, 0); 72d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes if (rc && ENOSYS == errno) 73d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes perror_msg_and_skip(STR_GETRLIMIT); 74d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes printf("%s(%s, NULL) = %ld %s (%m)\n", 75d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes STR_GETRLIMIT, xlat->str, rc, errno2name()); 76d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 77d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes rc = syscall(NR_GETRLIMIT, res, rlimit); 78d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes if (rc) 79d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes printf("%s(%s, NULL) = %ld %s (%m)\n", 80d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes STR_GETRLIMIT, xlat->str, rc, errno2name()); 81d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes else 82d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes printf("%s(%s, {rlim_cur=%s, rlim_max=%s})" 83d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes " = 0\n", STR_GETRLIMIT, xlat->str, 84d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes sprint_rlim(rlimit[0]), sprint_rlim(rlimit[1])); 85d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes } 86d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 87d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes puts("+++ exited with 0 +++"); 88d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes return 0; 89d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes} 90d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 91d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#endif /* NR_GETRLIMIT */ 92