1 /* 2 * Check decoding of prlimit64 syscall. 3 * 4 * Copyright (c) 2016 Dmitry V. Levin <ldv@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 "tests.h" 31 #include <asm/unistd.h> 32 33 #ifdef __NR_prlimit64 34 35 # include <inttypes.h> 36 # include <stdio.h> 37 # include <stdint.h> 38 # include <sys/resource.h> 39 # include <unistd.h> 40 41 # include "xlat.h" 42 # include "xlat/resources.h" 43 44 const char * 45 sprint_rlim(uint64_t lim) 46 { 47 if (lim == -1ULL) 48 return "RLIM64_INFINITY"; 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], "%" PRIu64 "*1024", lim / 1024); 55 else 56 sprintf(buf[i], "%" PRIu64, lim); 57 58 return buf[i++]; 59 } 60 61 int 62 main(void) 63 { 64 unsigned long pid = 65 (unsigned long) 0xdefaced00000000ULL | (unsigned) getpid(); 66 uint64_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_prlimit64, pid, res, 0, rlimit); 72 if (rc) 73 printf("prlimit64(%d, %s, NULL, %p) = %ld %s (%m)\n", 74 (unsigned) pid, xlat->str, rlimit, 75 rc, errno2name()); 76 else 77 printf("prlimit64(%d, %s, NULL" 78 ", {rlim_cur=%s, rlim_max=%s}) = 0\n", 79 (unsigned) pid, xlat->str, 80 sprint_rlim(rlimit[0]), 81 sprint_rlim(rlimit[1])); 82 } 83 84 puts("+++ exited with 0 +++"); 85 return 0; 86 } 87 88 #else 89 90 SKIP_MAIN_UNDEFINED("__NR_prlimit64") 91 92 #endif 93