96 lines
2.3 KiB
C
96 lines
2.3 KiB
C
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/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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int main(int argc, char *argv[])
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{
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int i;
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int nfiles;
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int *fds;
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char *dir;
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struct stat statbuf;
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char name[16];
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struct rlimit rlim;
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if (argc != 3) {
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fprintf(stderr, "Usage: opentest <directory> <num_files>\n");
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exit(1);
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}
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dir = argv[1];
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nfiles = atoi(argv[2]);
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if ((nfiles <= 0) || (nfiles > 65536)) {
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fprintf(stderr, "num_files must be between 1 and 65536\n");
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exit(1);
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}
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if (stat(dir, &statbuf)) {
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fprintf(stderr, "Cannot stat %s\n", dir);
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exit(1);
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}
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if (! S_ISDIR(statbuf.st_mode)) {
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fprintf(stderr, "%s is not a directory!\n", dir);
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exit(1);
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}
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if (access(dir, R_OK | W_OK)) {
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fprintf(stderr, "No access to %s\n", dir);
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exit(1);
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}
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fds = malloc(nfiles * sizeof(int));
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if (fds == 0) {
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fprintf(stderr, "Unable to malloc array of %d fds\n", nfiles);
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exit(1);
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}
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if (chdir(dir)) {
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fprintf(stderr, "Cannot chdir to %s\n", dir);
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exit(1);
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}
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rlim.rlim_cur = nfiles + 10;
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rlim.rlim_max = nfiles + 10;
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if (setrlimit(RLIMIT_NOFILE, &rlim)) {
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fprintf(stderr, "Unable to raise RLIMIT_NOFILE to %ld\n", rlim.rlim_cur);
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exit(1);
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}
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for (i = 0; i < nfiles; i++) {
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snprintf(name, sizeof(name), "%d", i);
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fds[i] = open(name, O_WRONLY | O_CREAT, 0666);
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if (fds[i] < 0) {
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fprintf(stderr, "Unable to open %d fd\n", i);
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exit(1);
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}
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}
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/* Rely upon exit to cleanup! */
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exit(0);
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}
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