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Improved the program that checks for broken large-file locking.

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Wayne Davison
2004-04-30 17:38:22 +00:00
parent 6e06d2f31a
commit 9eac94a4dd
1 changed files with 13 additions and 8 deletions
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21
configure.in
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@@ -146,21 +146,26 @@ AC_TRY_RUN([
int main(void)
{
struct flock lock;
int status;
int fd = open("conftest.dat", O_CREAT|O_RDWR, 0600);
int status;
char tpl[32] = "/tmp/locktest.XXXXXX";
int fd = mkstemp(tpl);
if (fd < 0) {
strcpy(tpl, "conftest.dat");
fd = open(tpl, O_CREAT|O_RDWR, 0600);
}
lock.l_type = F_WRLCK;
lock.l_whence = SEEK_SET;
lock.l_start = 0;
lock.l_len = 1;
lock.l_pid = 0;
fcntl(fd,F_SETLK,&lock);
if (fork() == 0) {
lock.l_start = 1;
exit(fcntl(fd,F_SETLK,&lock) == 0);
}
wait(&status);
unlink("conftest.dat");
lock.l_start = 1;
_exit(fcntl(fd,F_SETLK,&lock) == 0);
}
wait(&status);
unlink(tpl);
exit(WEXITSTATUS(status));
}
],