469 lines
11 KiB
C
469 lines
11 KiB
C
/*
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* Copyright (c) International Business Machines Corp., 2001
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* Copyright (c) 2020 Petr Vorel <pvorel@suse.cz>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* NAME
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* ioctl02.c
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*
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* DESCRIPTION
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* Testcase to test the TCGETA, and TCSETA ioctl implementations for
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* the tty driver
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*
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* ALGORITHM
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* In this test, the parent and child open the parentty and the childtty
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* respectively. After opening the childtty the child flushes the stream
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* and sends a SIGUSR1 to the parent (thereby asking it to continue its
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* testing). The parent, which was waiting for this signal to arrive, now
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* starts the testing. It issues a TCGETA ioctl to get all the tty
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* parameters. It then changes them to known values by issuing a TCSETA
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* ioctl. Then the parent issues a TCGETA ioctl again and compares the
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* received values with what it had set earlier. The test fails if TCGETA
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* or TCSETA fails, or if the received values don't match those that were
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* set. The parent does all the testing, the requirement of the child
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* process is to moniter the testing done by the parent, and hence the
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* child just waits for the parent.
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*
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* USAGE: <for command-line>
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* ioctl02 -D /dev/tty[0-9] [-c n] [-f] [-i n] [-I x] [-P x] [-t]
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* where, -c n : Run n copies concurrently.
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* -f : Turn off functionality Testing.
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* -i n : Execute test n times.
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* -I x : Execute test for x seconds.
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* -P x : Pause for x seconds between iterations.
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* -t : Turn on syscall timing.
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*
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* HISTORY
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* 07/2001 Ported by Wayne Boyer
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*
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* RESTRICTIONS
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* test must be run with the -D option
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* test may have to be run as root depending on the tty permissions
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*/
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#include <stdio.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <errno.h>
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#include <sys/wait.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <termios.h>
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#include "test.h"
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#include "safe_macros.h"
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#include "lapi/ioctl.h"
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#define CNUL 0
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char *TCID = "ioctl02";
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int TST_TOTAL = 1;
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static struct termio termio, save_io;
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static char *parenttty, *childtty;
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static int parentfd, childfd;
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static int parentpid, childpid;
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static volatile int sigterm, sigusr1, sigusr2;
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static int closed = 1;
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static int do_child_setup(void);
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static int do_parent_setup(void);
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static int run_ptest(void);
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static int run_ctest(void);
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static int chk_tty_parms();
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static void setup(void);
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static void cleanup(void);
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static void help(void);
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static void do_child(void);
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void do_child_uclinux(void);
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static void sigterm_handler(void);
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static int Devflag;
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static char *devname;
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static option_t options[] = {
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{"D:", &Devflag, &devname},
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{NULL, NULL, NULL}
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};
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int main(int ac, char **av)
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{
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int lc;
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int rval;
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tst_parse_opts(ac, av, options, &help);
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#ifdef UCLINUX
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maybe_run_child(&do_child_uclinux, "dS", &parentpid, &childtty);
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#endif
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if (!Devflag)
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tst_brkm(TBROK, NULL, "You must specify a tty device with "
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"the -D option.");
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tst_require_root();
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setup();
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for (lc = 0; TEST_LOOPING(lc); lc++) {
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tst_count = 0;
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parenttty = devname;
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childtty = devname;
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parentpid = getpid();
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childpid = FORK_OR_VFORK();
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if (childpid < 0)
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tst_brkm(TBROK, cleanup, "fork failed");
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if (childpid == 0) { /* child */
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#ifdef UCLINUX
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if (self_exec(av[0], "dS", parentpid, childtty) < 0)
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tst_brkm(TBROK, cleanup, "self_exec failed");
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#else
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do_child();
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#endif
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}
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while (!sigusr1)
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sleep(1);
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sigusr1 = 0;
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parentfd = do_parent_setup();
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if (parentfd < 0) {
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kill(childpid, SIGTERM);
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waitpid(childpid, NULL, 0);
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cleanup();
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}
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/* run the parent test */
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rval = run_ptest();
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if (rval == -1) {
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/*
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* Parent cannot set/get ioctl parameters.
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* SIGTERM the child and cleanup.
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*/
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kill(childpid, SIGTERM);
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waitpid(childpid, NULL, 0);
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cleanup();
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}
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if (rval != 0)
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tst_resm(TFAIL, "TCGETA/TCSETA tests FAILED with "
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"%d %s", rval, rval > 1 ? "errors" : "error");
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else
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tst_resm(TPASS, "TCGETA/TCSETA tests SUCCEEDED");
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/* FIXME: check return codes. */
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(void)kill(childpid, SIGTERM);
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(void)waitpid(childpid, NULL, 0);
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/*
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* Clean up things from the parent by restoring the
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* tty device information that was saved in setup()
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* and closing the tty file descriptor.
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*/
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if (ioctl(parentfd, TCSETA, &save_io) == -1)
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tst_resm(TINFO, "ioctl restore failed in main");
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SAFE_CLOSE(cleanup, parentfd);
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closed = 1;
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}
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cleanup();
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tst_exit();
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}
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static void do_child(void)
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{
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childfd = do_child_setup();
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if (childfd < 0)
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_exit(1);
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run_ctest();
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_exit(0);
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}
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void do_child_uclinux(void)
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{
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struct sigaction act;
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/* Set up the signal handlers again */
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act.sa_handler = (void *)sigterm_handler;
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act.sa_flags = 0;
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sigemptyset(&act.sa_mask);
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(void)sigaction(SIGTERM, &act, 0);
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/* Run the normal child */
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do_child();
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}
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/*
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* run_ptest() - setup the various termio structure values and issue
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* the TCSETA ioctl call with the TEST macro.
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*/
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static int run_ptest(void)
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{
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int i, rval;
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/* Use "old" line discipline */
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termio.c_line = 0;
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/* Set control modes */
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termio.c_cflag = B50 | CS7 | CREAD | PARENB | PARODD | CLOCAL;
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/* Set control chars. */
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for (i = 0; i < NCC; i++) {
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if (i == VEOL2)
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continue;
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termio.c_cc[i] = CSTART;
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}
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/* Set local modes. */
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termio.c_lflag =
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((unsigned short)(ISIG | ICANON | XCASE | ECHO | ECHOE | NOFLSH));
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/* Set input modes. */
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termio.c_iflag =
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BRKINT | IGNPAR | INPCK | ISTRIP | ICRNL | IUCLC | IXON | IXANY |
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IXOFF;
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/* Set output modes. */
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termio.c_oflag = OPOST | OLCUC | ONLCR | ONOCR;
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TEST(ioctl(parentfd, TCSETA, &termio));
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if (TEST_RETURN < 0) {
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tst_resm(TFAIL, "ioctl TCSETA failed : "
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"errno = %d", TEST_ERRNO);
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return -1;
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}
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/* Get termio and see if all parameters actually got set */
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rval = ioctl(parentfd, TCGETA, &termio);
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if (rval < 0) {
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tst_resm(TFAIL, "ioctl TCGETA failed. Ending test.");
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return -1;
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}
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return chk_tty_parms();
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}
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static int run_ctest(void)
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{
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/*
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* Wait till the parent has finished testing.
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*/
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while (!sigterm)
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sleep(1);
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sigterm = 0;
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tst_resm(TINFO, "child: Got SIGTERM from parent.");
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if (close(childfd) == -1)
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tst_resm(TINFO, "close() in run_ctest() failed");
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return 0;
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}
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static int chk_tty_parms(void)
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{
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int i, flag = 0;
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if (termio.c_line != 0) {
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tst_resm(TINFO, "line discipline has incorrect value %o",
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termio.c_line);
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flag++;
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}
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/*
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* The following Code Sniffet is disabled to check the value of c_cflag
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* as it seems that due to some changes from 2.6.24 onwards, this
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* setting is not done properly for either of (B50|CS7|CREAD|PARENB|
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* PARODD|CLOCAL|(CREAD|HUPCL|CLOCAL).
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* However, it has been observed that other flags are properly set.
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*/
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#if 0
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if (termio.c_cflag != (B50 | CS7 | CREAD | PARENB | PARODD | CLOCAL)) {
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tst_resm(TINFO, "cflag has incorrect value. %o",
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termio.c_cflag);
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flag++;
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}
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#endif
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for (i = 0; i < NCC; i++) {
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if (i == VEOL2) {
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if (termio.c_cc[VEOL2] == CNUL) {
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continue;
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} else {
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tst_resm(TINFO, "control char %d has "
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"incorrect value %d %d", i,
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termio.c_cc[i], CNUL);
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flag++;
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continue;
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}
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}
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if (termio.c_cc[i] != CSTART) {
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tst_resm(TINFO, "control char %d has incorrect "
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"value %d.", i, termio.c_cc[i]);
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flag++;
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}
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}
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if (!
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(termio.c_lflag
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&& (ISIG | ICANON | XCASE | ECHO | ECHOE | NOFLSH))) {
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tst_resm(TINFO, "lflag has incorrect value. %o",
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termio.c_lflag);
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flag++;
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}
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if (!
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(termio.c_iflag
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&& (BRKINT | IGNPAR | INPCK | ISTRIP | ICRNL | IUCLC | IXON | IXANY
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| IXOFF))) {
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tst_resm(TINFO, "iflag has incorrect value. %o",
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termio.c_iflag);
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flag++;
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}
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if (!(termio.c_oflag && (OPOST | OLCUC | ONLCR | ONOCR))) {
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tst_resm(TINFO, "oflag has incorrect value. %o",
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termio.c_oflag);
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flag++;
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}
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if (!flag)
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tst_resm(TINFO, "termio values are set as expected");
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return flag;
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}
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static int do_parent_setup(void)
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{
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int pfd;
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pfd = SAFE_OPEN(cleanup, parenttty, O_RDWR, 0777);
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/* unset the closed flag */
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closed = 0;
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/* flush tty queues to remove old output */
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SAFE_IOCTL(cleanup, pfd, TCFLSH, 2);
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return pfd;
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}
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static int do_child_setup(void)
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{
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int cfd;
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cfd = open(childtty, O_RDWR, 0777);
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if (cfd < 0) {
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tst_resm(TINFO, "Could not open %s in do_child_setup(), errno "
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"= %d", childtty, errno);
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/* signal the parent so we don't hang the test */
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kill(parentpid, SIGUSR1);
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return -1;
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}
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/* flush tty queues to remove old output */
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if (ioctl(cfd, TCFLSH, 2) < 0) {
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tst_resm(TINFO, "ioctl TCFLSH failed. : errno = %d", errno);
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/* signal the parent so we don't hang the test */
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kill(parentpid, SIGUSR1);
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return -1;
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}
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/* tell the parent that we're done */
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kill(parentpid, SIGUSR1);
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return cfd;
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}
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/*
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* Define the signals handlers here.
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*/
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static void sigterm_handler(void)
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{
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sigterm = 1;
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}
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static void sigusr1_handler(void)
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{
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sigusr1 = 1;
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}
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static void sigusr2_handler(void)
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{
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sigusr2 = 1;
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}
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static void help(void)
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{
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printf(" -D <tty device> : for example, /dev/tty[0-9]\n");
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}
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static void setup(void)
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{
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int fd;
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struct sigaction act;
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/* XXX: TERRNO required all over the place */
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fd = SAFE_OPEN(NULL, devname, O_RDWR, 0777);
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/* Save the current device information - to be restored in cleanup() */
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SAFE_IOCTL(cleanup, fd, TCGETA, &save_io);
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/* Close the device */
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SAFE_CLOSE(cleanup, fd);
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/* Set up the signal handlers */
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act.sa_handler = (void *)sigterm_handler;
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act.sa_flags = 0;
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sigemptyset(&act.sa_mask);
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(void)sigaction(SIGTERM, &act, 0);
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act.sa_handler = (void *)sigusr1_handler;
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act.sa_flags = 0;
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(void)sigaction(SIGUSR1, &act, 0);
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act.sa_handler = (void *)sigusr2_handler;
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act.sa_flags = 0;
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(void)sigaction(SIGUSR2, &act, 0);
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act.sa_handler = SIG_IGN;
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act.sa_flags = 0;
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(void)sigaction(SIGTTOU, &act, 0);
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sigterm = sigusr1 = sigusr2 = 0;
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TEST_PAUSE;
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}
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static void cleanup(void)
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{
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if (!closed) {
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if (ioctl(parentfd, TCSETA, &save_io) == -1)
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tst_resm(TINFO, "ioctl restore failed in cleanup()");
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if (close(parentfd) == -1)
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tst_resm(TINFO, "close() failed in cleanup()");
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}
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}
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