| OZ++ Sample: ResourceLimit |
/****************************************************************************** * * Copyright (c) 2015 TOSHIYUKI ARAI. ALL RIGHTS RESERVED. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions, and the following disclaimer. * * 2. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * * ResourceLimit.cpp * *****************************************************************************/ #include <oz++/ResourceLimit.h> // int main(int argc, char* argv[]) { ResourceLimit resLimit; printf("ResourceLimit::showAll\n"); resLimit.showAll(); printf("\n"); struct rlimit limit = resLimit.coreFileSize(); printf("Current coreFileSize \n"); resLimit.showCoreFileSize(); try { printf("Try to update coreFileSize Soft = 10000 Hard = 1000000\n"); limit.rlim_cur = 10000; limit.rlim_max = 1000000; resLimit.coreFileSize(limit); resLimit.showCoreFileSize(); } catch (Exception& ex) { caught(ex); } try { printf("Try to update coreFileSize Soft = -1 Hard = 0\n"); limit.rlim_cur = -1; limit.rlim_max = 0; resLimit.coreFileSize(limit); resLimit.showCoreFileSize(); } catch (Exception& ex) { caught(ex); } limit = resLimit.files(); printf("Current files \n"); resLimit.showFiles(); try { //Increase the maximum file descriptor number that can be opened limit.rlim_cur *= 2; printf("Try to update files Soft = %lu rlim Hard = %lu\n", limit.rlim_cur, limit.rlim_max); resLimit.files(limit); resLimit.showFiles(); for(unsigned long i = 0; i<limit.rlim_cur; i++) { char name[256]; sprintf(name, "/tmp/tmp_%lu.txt", i); FILE* fp = fopen(name, "w"); if (fp) { //printf("Opened file %s\n", name); } else { printf("Failed to open file %s\n", name); break; } } } catch (Exception& ex) { caught(ex); } return 0; }