mirror of
https://github.com/freebsd/freebsd-src
synced 2024-07-24 03:37:16 +00:00
![Dag-Erling Smørgrav](/assets/img/avatar_default.png)
MFC after: 1 week Sponsored by: Klara, Inc. Reviewed by: allanjude Differential Revision: https://reviews.freebsd.org/D41491
59 lines
1.2 KiB
C
59 lines
1.2 KiB
C
/*-
|
|
* Copyright (c) 2023 Klara, Inc.
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <sys/resource.h>
|
|
#include <sys/wait.h>
|
|
|
|
#include <errno.h>
|
|
#include <libutil.h>
|
|
#include <unistd.h>
|
|
|
|
#include <atf-c.h>
|
|
|
|
ATF_TC(forkfail);
|
|
ATF_TC_HEAD(forkfail, tc)
|
|
{
|
|
atf_tc_set_md_var(tc, "descr", "Check for fd leak when fork() fails");
|
|
atf_tc_set_md_var(tc, "require.user", "unprivileged");
|
|
}
|
|
|
|
ATF_TC_BODY(forkfail, tc)
|
|
{
|
|
struct rlimit orl, nrl;
|
|
pid_t pid;
|
|
int prevfd, fd, pty;
|
|
|
|
/* set process limit to 1 so fork() will fail */
|
|
ATF_REQUIRE_EQ(0, getrlimit(RLIMIT_NPROC, &orl));
|
|
nrl = orl;
|
|
nrl.rlim_cur = 1;
|
|
ATF_REQUIRE_EQ(0, setrlimit(RLIMIT_NPROC, &nrl));
|
|
/* check first free fd */
|
|
ATF_REQUIRE((fd = dup(0)) > 0);
|
|
ATF_REQUIRE_EQ(0, close(fd));
|
|
/* attempt forkpty() */
|
|
pid = forkpty(&pty, NULL, NULL, NULL);
|
|
if (pid == 0) {
|
|
/* child - fork() unexpectedly succeeded */
|
|
_exit(0);
|
|
}
|
|
ATF_CHECK_ERRNO(EAGAIN, pid < 0);
|
|
if (pid > 0) {
|
|
/* parent - fork() unexpectedly succeeded */
|
|
(void)waitpid(pid, NULL, 0);
|
|
}
|
|
/* check that first free fd hasn't changed */
|
|
prevfd = fd;
|
|
ATF_REQUIRE((fd = dup(0)) > 0);
|
|
ATF_CHECK_EQ(prevfd, fd);
|
|
}
|
|
|
|
ATF_TP_ADD_TCS(tp)
|
|
{
|
|
ATF_TP_ADD_TC(tp, forkfail);
|
|
return (atf_no_error());
|
|
}
|