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