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Added a system call test for SetForegroundProcessGroup

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-Added a test to check if the process in background is blocking SIGTTOU
-Some minor formatting fixes
This commit is contained in:
gystemd
2021-08-19 01:05:42 +02:00
parent 482de52b60
commit ce4e54186e
1 changed files with 53 additions and 26 deletions
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test/syscalls/linux/pty.cc
+53 -26
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@@ -1640,57 +1640,84 @@ TEST_F(JobControlTest, DISABLED_SetForegroundProcessGroup) {
ASSERT_NO_ERRNO(res);
}
// This test verify if a SIGTTOU signal is sent to the calling process'group
// This test verifies if a SIGTTOU signal is sent to the calling process's group
// when tcsetpgrp is called by a background process
TEST_F(JobControlTest, SetForegroundProcessGroupSIGTTOUBackground) {
auto res = RunInChild([=]() {
setsid();
TEST_PCHECK(setsid() >= 0);
TEST_PCHECK(!ioctl(replica_.get(), TIOCSCTTY, 0));
pid_t grandchild = fork();
if (!grandchild) {
//assign a different pgid to the child so it will result as
//a background process
setpgid(grandchild, getpid());
tcsetpgrp(replica_.get(), getpgid(0));
// We should never reach this.
_exit(1);
}
// Assign a different pgid to the child so it will result as
// a background process.
TEST_PCHECK(!setpgid(grandchild, getpid()));
TEST_PCHECK(!tcsetpgrp(replica_.get(), getpgid(0)));
// We should never reach this.
_exit(1);
}
int wstatus;
TEST_PCHECK(waitpid(grandchild, &wstatus, WSTOPPED) == grandchild);
TEST_PCHECK(WSTOPSIG(wstatus)==SIGTTOU);
TEST_PCHECK(WSTOPSIG(wstatus) == SIGTTOU);
});
ASSERT_NO_ERRNO(res);
}
// This test verify that a SIGTTOU signal is not delivered to
// This test verifies that a SIGTTOU signal is not delivered to
// a background process which calls tcsetpgrp and is ignoring SIGTTOU
TEST_F(JobControlTest, SetForegroundProcessGroupSIGTTOUIgnored) {
auto res = RunInChild([=]() {
setsid();
TEST_PCHECK(setsid() >= 0);
TEST_PCHECK(!ioctl(replica_.get(), TIOCSCTTY, 0));
pid_t grandchild = fork();
if (!grandchild) {
// ignore SIGTTOU so the child in background won't
// be stopped when it will call tcsetpgrp
struct sigaction sa = {};
sa.sa_handler = SIG_IGN;
sa.sa_flags = 0;
sigemptyset(&sa.sa_mask);
sigaction(SIGTTOU, &sa, NULL);
//assign a different pgid to the child so it will result as
//a background process
setpgid(grandchild, getpid());
tcsetpgrp(replica_.get(), getpgid(0));
_exit(0);
}
// Ignore SIGTTOU so the child in background won't
// be stopped when it will call tcsetpgrp
struct sigaction sa = {};
sa.sa_handler = SIG_IGN;
sa.sa_flags = 0;
sigemptyset(&sa.sa_mask);
sigaction(SIGTTOU, &sa, NULL);
// Assign a different pgid to the child so it will result as
// a background process.
TEST_PCHECK(!setpgid(grandchild, getpid()));
TEST_PCHECK(!tcsetpgrp(replica_.get(), getpgid(0)));
_exit(0);
}
int wstatus;
TEST_PCHECK(waitpid(grandchild, &wstatus, WSTOPPED) == grandchild);
TEST_PCHECK(WSTOPSIG(wstatus)!=SIGTTOU);
TEST_PCHECK(WSTOPSIG(wstatus) != SIGTTOU);
TEST_PCHECK(WIFEXITED(wstatus));
});
ASSERT_NO_ERRNO(res);
}
// This test verifies that a SIGTTOU signal is not delivered to
// a background process which calls tcsetpgrp and is blocking SIGTTOU
TEST_F(JobControlTest, SetForegroundProcessGroupSIGTTOUBlocked) {
auto res = RunInChild([=]() {
TEST_PCHECK(setsid() >= 0);
TEST_PCHECK(!ioctl(replica_.get(), TIOCSCTTY, 0));
pid_t grandchild = fork();
if (!grandchild) {
// Block SIGTTOU so the child in background won't
// be stopped when it will call tcsetpgrp
sigset_t signal_set;
sigemptyset(&signal_set);
sigaddset(&signal_set, SIGTTOU);
sigprocmask(SIG_BLOCK, &signal_set, NULL);
// Assign a different pgid to the child so it will result as
// a background process.
TEST_PCHECK(!setpgid(grandchild, getpid()));
TEST_PCHECK(!tcsetpgrp(replica_.get(), getpgid(0)));
_exit(0);
}
int wstatus;
TEST_PCHECK(waitpid(grandchild, &wstatus, WSTOPPED) == grandchild);
TEST_PCHECK(WSTOPSIG(wstatus) != SIGTTOU);
});
ASSERT_NO_ERRNO(res);
}
TEST_F(JobControlTest, SetForegroundProcessGroupWrongTTY) {
pid_t pid = getpid();
ASSERT_THAT(ioctl(replica_.get(), TIOCSPGRP, &pid),