glibc/tests/Regression/fallocate_156289/fallocate.c++

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#include <sys/types.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#include <sys/mman.h>
#include <strings.h>
#include <iostream>
#include <unistd.h>
#include <signal.h>
using namespace std;
int main(int argc, char **argv)
{
::signal(SIGXFSZ, SIG_IGN);
if (argc!=3)
{
puts("usage: posixFallocateTester <filename> <size in bytes>");
return 1;
}
const size_t N = ::atoi(argv[2]);
int fd = open(argv[1], O_RDWR| O_CREAT |O_TRUNC, 0666 );
if (fd < 0)
{
perror("open failed");
exit(1);
}
if (::posix_fallocate(fd, 0, N) != 0)
{
perror("posix_fallocate failed");
exit(1);
}
}