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/* Check posix_spawn set controlling terminal extension.
Copyright (C) 2022 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; if not, see
<https://www.gnu.org/licenses/>. */
#include <array_length.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <intprops.h>
#include <paths.h>
#include <spawn.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <support/check.h>
#include <support/xunistd.h>
#include <sys/wait.h>
static int
handle_restart (const char *argv1)
{
int fd = xopen (_PATH_TTY, O_RDONLY, 0600);
/* If process group is not changed (POSIX_SPAWN_SETPGROUP), then check
the creating process one, otherwise check against the process group
itself. */
pid_t pgrp;
if (strcmp (argv1, "setgrpr") != 0)
TEST_COMPARE (sscanf (argv1, "%d", &pgrp), 1);
else
{
pgrp = getpgrp ();
/* Check if a new process group was actually created. */
pid_t ppid = getppid ();
pid_t pgid = getpgid (ppid);
TEST_VERIFY (pgid != pgrp);
}
TEST_COMPARE (tcgetpgrp (fd), pgrp);
xclose (fd);
return 0;
}
static int restart;
#define CMDLINE_OPTIONS \
{ "restart", no_argument, &restart, 1 },
static void
run_subprogram (int argc, char *argv[], const posix_spawnattr_t *attr,
int exp_err)
{
short int flags;
TEST_COMPARE (posix_spawnattr_getflags (attr, &flags), 0);
bool setpgrp = flags & POSIX_SPAWN_SETPGROUP;
char *spargv[9];
char pgrp[INT_STRLEN_BOUND (pid_t)];
int i = 0;
for (; i < argc - 1; i++)
spargv[i] = argv[i + 1];
spargv[i++] = (char *) "--direct";
spargv[i++] = (char *) "--restart";
if (setpgrp)
spargv[i++] = (char *) "setgrpr";
else
{
snprintf (pgrp, sizeof pgrp, "%d", getpgrp ());
spargv[i++] = pgrp;
}
spargv[i] = NULL;
TEST_VERIFY_EXIT (i < array_length (spargv));
pid_t pid;
TEST_COMPARE (posix_spawn (&pid, argv[1], NULL, attr, spargv, environ),
exp_err);
if (exp_err != 0)
return;
int status;
TEST_COMPARE (xwaitpid (pid, &status, WUNTRACED), pid);
TEST_VERIFY (WIFEXITED (status));
TEST_VERIFY (!WIFSTOPPED (status));
TEST_VERIFY (!WIFSIGNALED (status));
TEST_COMPARE (WEXITSTATUS (status), 0);
}
static int
do_test (int argc, char *argv[])
{
/* We must have either:
- four parameters left if called initially:
+ path to ld.so optional
+ "--library-path" optional
+ the library path optional
+ the application name
- six parameters left if called through re-execution:
+ --setgrpr optional
*/
if (restart)
return handle_restart (argv[1]);
int tcfd = xopen (_PATH_TTY, O_RDONLY, 0600);
/* Check getters and setters. */
{
posix_spawnattr_t attr;
TEST_COMPARE (posix_spawnattr_init (&attr), 0);
TEST_COMPARE (posix_spawnattr_tcsetpgrp_np (&attr, tcfd), 0);
int fd;
TEST_COMPARE (posix_spawnattr_tcgetpgrp_np (&attr, &fd), 0);
TEST_COMPARE (tcfd, fd);
}
/* Check setting the controlling terminal without changing the group. */
{
posix_spawnattr_t attr;
TEST_COMPARE (posix_spawnattr_init (&attr), 0);
TEST_COMPARE (posix_spawnattr_setflags (&attr, POSIX_SPAWN_TCSETPGROUP),
0);
TEST_COMPARE (posix_spawnattr_tcsetpgrp_np (&attr, tcfd), 0);
run_subprogram (argc, argv, &attr, 0);
}
/* Check setting both the controlling terminal and the create a new process
group. */
{
posix_spawnattr_t attr;
TEST_COMPARE (posix_spawnattr_init (&attr), 0);
TEST_COMPARE (posix_spawnattr_setflags (&attr, POSIX_SPAWN_TCSETPGROUP
| POSIX_SPAWN_SETPGROUP),
0);
TEST_COMPARE (posix_spawnattr_setpgroup (&attr, 0), 0);
TEST_COMPARE (posix_spawnattr_tcsetpgrp_np (&attr, tcfd), 0);
run_subprogram (argc, argv, &attr, 0);
}
/* Trying to set the controlling terminal after a setsid incurs in a ENOTTY
from tcsetpgrp. */
{
posix_spawnattr_t attr;
TEST_COMPARE (posix_spawnattr_init (&attr), 0);
TEST_COMPARE (posix_spawnattr_setflags (&attr, POSIX_SPAWN_TCSETPGROUP
| POSIX_SPAWN_SETSID), 0);
TEST_COMPARE (posix_spawnattr_tcsetpgrp_np (&attr, tcfd), 0);
run_subprogram (argc, argv, &attr, ENOTTY);
}
xclose (tcfd);
return 0;
}
#define TEST_FUNCTION_ARGV do_test
#include <support/test-driver.c>
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