* Clones a new child process with CLONE_NEWPID flag - the new child * process mounts procfs to a "proc" directory and checks if it belongs * to a new pid namespace by: * 1. reading value of a symbolic link "proc/self" * 2. comparing read value (PID) with "1"
Signed-off-by: Matus Marhefka <mmarh...@redhat.com> Signed-off-by: Jiri Jaburek <jjabu...@redhat.com> --- testcases/kernel/containers/pidns/pidns03.c | 122 ++++++++++++++++++++++++++++ 1 file changed, 122 insertions(+) create mode 100644 testcases/kernel/containers/pidns/pidns03.c diff --git a/testcases/kernel/containers/pidns/pidns03.c b/testcases/kernel/containers/pidns/pidns03.c new file mode 100644 index 0000000..600683d --- /dev/null +++ b/testcases/kernel/containers/pidns/pidns03.c @@ -0,0 +1,122 @@ +/* Copyright (c) 2014 Red Hat, Inc. All rights reserved. + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of version 2 the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + *********************************************************************** + * File: pidns03.c + * + * Description: + * Clones a new child process with CLONE_NEWPID flag - the new child + * process mounts procfs to a "proc" directory and checks if it belongs + * to a new pid namespace by: + * 1. reading value of a symbolic link "proc/self" + * 2. comparing read value (PID) with "1" + */ + +#define _GNU_SOURCE +#include <sys/wait.h> +#include <sys/mount.h> +#include <sys/types.h> +#include <stdio.h> +#include <string.h> +#include <unistd.h> +#include <errno.h> +#include "usctest.h" +#include "test.h" +#include "safe_macros.h" +#include "libclone.h" + + +#define PROCDIR "proc" +char *TCID = "pidns03"; +int TST_TOTAL = 1; + + +static void cleanup(void) +{ + tst_rmdir(); +} + +static void setup(void) +{ + tst_require_root(NULL); + tst_tmpdir(); + SAFE_MKDIR(cleanup, PROCDIR, 0555); +} + +int child_func(void *arg) +{ + char buf[10]; + + if (mount("none", PROCDIR, "proc", MS_RDONLY, NULL) == -1) { + perror("mount"); + return 1; + } + + if (readlink(PROCDIR"/self", buf, sizeof(buf)) == -1) { + perror("readlink"); + umount(PROCDIR); + return 1; + } + + umount(PROCDIR); + + /* child should have PID 1 in a new pid namespace - if true + * procfs belongs to the new pid namespace */ + if (strcmp(buf, "1")) { + fprintf(stderr, "%s contains: %s\n", PROCDIR"/self", buf); + return 1; + } + + return 0; +} + +static void test(void) +{ + int status; + + if (do_clone_tests(CLONE_NEWPID, child_func, NULL, NULL, NULL) == -1) + tst_brkm(TBROK | TERRNO, cleanup, "clone failed"); + + SAFE_WAIT(cleanup, &status); + + if (WIFEXITED(status) && WEXITSTATUS(status) == 0) { + tst_resm(TPASS, "mounting procfs in a new namespace"); + return; + } + + if (WIFSIGNALED(status)) { + tst_resm(TFAIL, "child was killed with signal %s", + tst_strsig(WTERMSIG(status))); + return; + } + + tst_resm(TFAIL, "mounting procfs in a new namespace"); +} + +int main(int argc, char *argv[]) +{ + const char *msg; + int lc; + + msg = parse_opts(argc, argv, NULL, NULL); + if (msg != NULL) + tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg); + + setup(); + + for (lc = 0; TEST_LOOPING(lc); lc++) + test(); + + cleanup(); + tst_exit(); +} -- 1.8.3.1 ------------------------------------------------------------------------------ Want fast and easy access to all the code in your enterprise? Index and search up to 200,000 lines of code with a free copy of Black Duck Code Sight - the same software that powers the world's largest code search on Ohloh, the Black Duck Open Hub! Try it now. http://p.sf.net/sfu/bds _______________________________________________ Ltp-list mailing list Ltp-list@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ltp-list
