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#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <unistd.h>
#include "fdleak.h"
#include "config.h"
int main(int argc, char **argv)
{
struct rlimit oldrlim;
struct rlimit newrlim;
int fd;
CLOSE_INHERITED_FDS;
if (getrlimit(RLIMIT_NOFILE, &oldrlim) < 0)
{
perror("getrlimit");
exit(1);
}
int expected_errno;
#if defined(VGO_freebsd)
expected_errno = EPERM;
#else
expected_errno = EINVAL;
#endif
newrlim.rlim_cur = oldrlim.rlim_max+1;
newrlim.rlim_max = oldrlim.rlim_max;
if (setrlimit(RLIMIT_NOFILE, &newrlim) == -1)
{
if (errno != expected_errno) {
#if defined(VGO_freebsd)
fprintf(stderr, "setrlimit exceeding hardlimit must set errno=EPERM\n");
#else
fprintf(stderr, "setrlimit exceeding hardlimit must set errno=EINVAL\n");
#endif
exit(1);
}
}
else
{
fprintf(stderr, "setrlimit exceeding hardlimit must return -1\n");
exit(1);
}
newrlim.rlim_cur = oldrlim.rlim_max;
newrlim.rlim_max = oldrlim.rlim_max+1;
if (setrlimit(RLIMIT_NOFILE, &newrlim) == -1)
{
if (errno != EPERM) {
fprintf(stderr, "setrlimit changing hardlimit must set errno=EPERM\n");
exit(1);
}
}
else
{
fprintf(stderr, "setrlimit changing hardlimit must return -1\n");
exit(1);
}
newrlim.rlim_cur = oldrlim.rlim_cur / 2;
newrlim.rlim_max = oldrlim.rlim_max;
if (setrlimit(RLIMIT_NOFILE, &newrlim) < 0)
{
perror("setrlimit");
exit(1);
}
if (getrlimit(RLIMIT_NOFILE, &newrlim) < 0)
{
perror("getrlimit");
exit(1);
}
if (newrlim.rlim_cur != oldrlim.rlim_cur / 2)
{
fprintf(stderr, "rlim_cur is %llu (should be %llu)\n",
(unsigned long long)newrlim.rlim_cur,
(unsigned long long)oldrlim.rlim_cur / 2);
}
if (newrlim.rlim_max != oldrlim.rlim_max)
{
fprintf(stderr, "rlim_max is %llu (should be %llu)\n",
(unsigned long long)newrlim.rlim_max,
(unsigned long long)oldrlim.rlim_max);
}
newrlim.rlim_cur -= 3; /* allow for stdin, stdout and stderr */
while (newrlim.rlim_cur-- > 0)
{
if (open("/dev/null", O_RDONLY) < 0)
{
perror("open");
}
}
if ((fd = open("/dev/null", O_RDONLY)) >= 0)
{
fprintf(stderr, "open succeeded with fd %d - it should have failed!\n", fd);
}
else if (errno != EMFILE)
{
perror("open");
}
/* We used to test setrlimit(RLIMIT_NOFILE, NULL) -1 || errno != EFAULT,
but glibc doesn't give any guarantees that won't just crash, in
newer versions it just silently succeeds... See bug #385912. */
exit(0);
}
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