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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2023-06-12 15:30:13 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2023-06-28 09:18:23 -0300 |
| commit | a9fed5ea811c3fe3d5186d260494710d424786ef (patch) | |
| tree | 01188bdab053b998c850d0d37ccd3d3b289afb4e /sysdeps/unix/sysv/linux/tst-ttyname-direct.c | |
| parent | aaa208502c97707119aea9e03a988bec26ad7817 (diff) | |
| download | glibc-a9fed5ea811c3fe3d5186d260494710d424786ef.zip glibc-a9fed5ea811c3fe3d5186d260494710d424786ef.tar.gz glibc-a9fed5ea811c3fe3d5186d260494710d424786ef.tar.bz2 | |
linux: Split tst-ttyname
The tst-ttyname-direct.c checks the ttyname with procfs mounted in
bind mode (MS_BIND|MS_REC), while tst-ttyname-namespace.c checks
with procfs mount with MS_NOSUID|MS_NOEXEC|MS_NODEV in a new
namespace.
Checked on x86_64-linux-gnu and aarch64-linux-gnu.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
Diffstat (limited to 'sysdeps/unix/sysv/linux/tst-ttyname-direct.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/tst-ttyname-direct.c | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/tst-ttyname-direct.c b/sysdeps/unix/sysv/linux/tst-ttyname-direct.c new file mode 100644 index 0000000..0460177 --- /dev/null +++ b/sysdeps/unix/sysv/linux/tst-ttyname-direct.c @@ -0,0 +1,110 @@ +/* Copyright (C) 2017-2023 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public License as + published by the Free Software Foundation; either version 2.1 of the + License, or (at your option) any later version. + + The GNU C Library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; see the file COPYING.LIB. If + not, see <https://www.gnu.org/licenses/>. */ + +#include <sched.h> +#include <sys/prctl.h> + +#include <support/namespace.h> + +#include "tst-ttyname-common.c" + +/* These chroot setup functions put the TTY at at "/console" (where it + won't be found by ttyname), and create "/dev/console" as an + ordinary file. This way, it's easier to write test-cases that + expect ttyname to fail; test-cases that expect it to succeed need + to explicitly remount it at "/dev/console". */ + +static int +do_in_chroot_1 (int (*cb)(const char *, int)) +{ + printf ("info: entering chroot 1\n"); + + /* Open the PTS that we'll be testing on. */ + int master; + char *slavename; + master = posix_openpt (O_RDWR|O_NOCTTY|O_NONBLOCK); + if (master < 0) + { + if (errno == ENOENT) + FAIL_UNSUPPORTED ("posix_openpt: %m"); + else + FAIL_EXIT1 ("posix_openpt: %m"); + } + VERIFY ((slavename = ptsname (master))); + VERIFY (unlockpt (master) == 0); + if (strncmp (slavename, "/dev/pts/", 9) != 0) + FAIL_UNSUPPORTED ("slave pseudo-terminal is not under /dev/pts/: %s", + slavename); + adjust_file_limit (slavename); + int slave = xopen (slavename, O_RDWR, 0); + if (!doit (slave, "basic smoketest", + (struct result_r){.name=slavename, .ret=0, .err=0})) + return 1; + + pid_t pid = xfork (); + if (pid == 0) + { + xclose (master); + + if (!support_enter_mount_namespace ()) + FAIL_UNSUPPORTED ("could not enter new mount namespace"); + + VERIFY (mount ("tmpfs", chrootdir, "tmpfs", 0, "mode=755") == 0); + VERIFY (chdir (chrootdir) == 0); + + xmkdir ("proc", 0755); + xmkdir ("dev", 0755); + xmkdir ("dev/pts", 0755); + + VERIFY (mount ("/proc", "proc", NULL, MS_BIND|MS_REC, NULL) == 0); + VERIFY (mount ("devpts", "dev/pts", "devpts", + MS_NOSUID|MS_NOEXEC, + "newinstance,ptmxmode=0666,mode=620") == 0); + VERIFY (symlink ("pts/ptmx", "dev/ptmx") == 0); + + touch ("console", 0); + touch ("dev/console", 0); + VERIFY (mount (slavename, "console", NULL, MS_BIND, NULL) == 0); + + xchroot ("."); + + char *linkname = xasprintf ("/proc/self/fd/%d", slave); + char *target = proc_fd_readlink (linkname); + VERIFY (strcmp (target, slavename) == 0); + free (linkname); + + _exit (cb (slavename, slave)); + } + int status; + xwaitpid (pid, &status, 0); + VERIFY (WIFEXITED (status)); + xclose (master); + xclose (slave); + return WEXITSTATUS (status); +} + +static int +do_test (void) +{ + support_become_root (); + + do_in_chroot_1 (run_chroot_tests); + + return 0; +} + +#include <support/test-driver.c> |