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