freebsd-dev/contrib/capsicum-test/waittest.c
Enji Cooper 8ac5aef8f3 Integrate capsicum-test into the FreeBSD test suite
This change takes capsicum-test from upstream and applies some local changes to make the
tests work on FreeBSD when executed via Kyua.

The local modifications are as follows:
1. Make `OpenatTest.WithFlag` pass with the new dot-dot lookup behavior in FreeBSD 12.x+.
2. capsicum-test references a set of helper binaries: `mini-me`, `mini-me.noexec`, and
   `mini-me.setuid`, as part of the execve/fexecve tests, via execve, fexecve, and open.
   It achieves this upstream by assuming `mini-me*` is in the current directory, however,
   in order for Kyua to execute `capsicum-test`, it needs to provide a full path to
   `mini-me*`. In order to achieve this, I made `capsicum-test` cache the executable's
   path from argv[0] in main(..) and use the cached value to compute the path to
   `mini-me*` as part of the execve/fexecve testcases.
3. The capsicum-test test suite assumes that it's always being run on CAPABILITIES enabled
   kernels. However, there's a chance that the test will be run on a host without a
   CAPABILITIES enabled kernel, so we must check for the support before running the tests.
   The way to achieve this is to add the relevant `feature_present("security_capabilities")`
   check to SetupEnvironment::SetUp() and skip the tests when the support is not available.
   While here, add a check for `kern.trap_enotcap` being enabled. As noted by markj@ in
   https://github.com/google/capsicum-test/issues/23, this sysctl being enabled can trigger
   non-deterministic failures. Therefore, the tests should be skipped if this sysctl is
   enabled.

All local changes have been submitted to the capsicum-test project
(https://github.com/google/capsicum-test) and are in various stages of review.
Please see the following pull requests for more details:
1. https://github.com/google/capsicum-test/pull/35
2. https://github.com/google/capsicum-test/pull/41
3. https://github.com/google/capsicum-test/pull/42

Reviewed by:	asomers
Discussed with:	emaste, markj
Approved by:	emaste (mentor)
MFC after:	2 months
Differential Revision: https://reviews.freebsd.org/D19758
2019-04-01 21:24:50 +00:00

43 lines
1.0 KiB
C

#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#ifdef __FreeBSD__
#include <sys/procdesc.h>
#endif
#ifdef __linux__
#include <sys/syscall.h>
int pdfork(int *fd, int flags) {
return syscall(__NR_pdfork, fd, flags);
}
#endif
int main() {
int procfd;
int rc = pdfork(&procfd, 0);
if (rc < 0) {
fprintf(stderr, "pdfork() failed rc=%d errno=%d %s\n", rc, errno, strerror(errno));
exit(1);
}
if (rc == 0) { // Child process
sleep(1);
exit(123);
}
fprintf(stderr, "pdfork()ed child pid=%ld procfd=%d\n", (long)rc, procfd);
sleep(2); // Allow child to complete
pid_t child = waitpid(-1, &rc, WNOHANG);
if (child == 0) {
fprintf(stderr, "waitpid(): no completed child found\n");
} else if (child < 0) {
fprintf(stderr, "waitpid(): failed errno=%d %s\n", errno, strerror(errno));
} else {
fprintf(stderr, "waitpid(): found completed child %ld\n", (long)child);
}
return 0;
}