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Check that flopen() can lock against self and that children inherit the lock.

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This commit is contained in:
Dag-Erling Smørgrav 2009-06-06 19:07:15 +00:00
parent 5649afd028
commit 4138849fa7
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=193592
1 changed files with 41 additions and 6 deletions
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47
tools/regression/lib/libutil/test-flopen.c
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@ -30,6 +30,7 @@
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/signal.h>
#include <sys/types.h>
#include <sys/fcntl.h>
@ -89,14 +90,13 @@ test_flopen_open(void)
return (result);
}
#if FLOPEN_CAN_LOCK_AGAINST_SELF
/*
* Test that flopen() can lock against itself
*/
const char *
test_flopen_lock_self(void)
{
const char *fn = "test_flopen_lock";
const char *fn = "test_flopen_lock_self";
const char *result = NULL;
int fd1, fd2;
@ -115,7 +115,6 @@ test_flopen_lock_self(void)
unlink(fn);
return (result);
}
#endif
/*
* Test that flopen() can lock against other processes
@ -123,7 +122,7 @@ test_flopen_lock_self(void)
const char *
test_flopen_lock_other(void)
{
const char *fn = "test_flopen_lock";
const char *fn = "test_flopen_lock_other";
const char *result = NULL;
volatile int fd1, fd2;
@ -148,16 +147,52 @@ test_flopen_lock_other(void)
return (result);
}
/*
* Test that child processes inherit the lock
*/
const char *
test_flopen_lock_child(void)
{
const char *fn = "test_flopen_lock_child";
const char *result = NULL;
pid_t pid;
volatile int fd1, fd2;
unlink(fn);
fd1 = flopen(fn, O_RDWR|O_CREAT, 0640);
if (fd1 < 0) {
result = strerror(errno);
} else {
if ((pid = fork()) == 0) {
select(0, 0, 0, 0, 0);
_exit(0);
}
close(fd1);
fd2 = -42;
if (vfork() == 0) {
fd2 = flopen(fn, O_RDWR|O_NONBLOCK);
close(fd2);
_exit(0);
}
if (fd2 == -42)
result = "vfork() doesn't work as expected";
if (fd2 >= 0)
result = "second open succeeded";
kill(pid, SIGINT);
}
unlink(fn);
return (result);
}
static struct test {
const char *name;
const char *(*func)(void);
} t[] = {
{ "flopen_create", test_flopen_create },
{ "flopen_open", test_flopen_open },
#if FLOPEN_CAN_LOCK_AGAINST_SELF
{ "flopen_lock_self", test_flopen_lock_self },
#endif
{ "flopen_lock_other", test_flopen_lock_other },
{ "flopen_lock_child", test_flopen_lock_child },
};
int