5659
5660 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
5661 if (fd != -1) {
5662 struct stat buf;
5663 ::close(fd);
5664 while (::stat(filename, &buf) == 0) {
5665 (void)::poll(NULL, 0, 100);
5666 }
5667 } else {
5668 jio_fprintf(stderr,
5669 "Could not open pause file '%s', continuing immediately.\n", filename);
5670 }
5671 }
5672
5673 extern char** environ;
5674
5675 // Run the specified command in a separate process. Return its exit value,
5676 // or -1 on failure (e.g. can't fork a new process).
5677 // Unlike system(), this function can be called from signal handler. It
5678 // doesn't block SIGINT et al.
5679 int os::fork_and_exec(char* cmd) {
5680 const char * argv[4] = {"sh", "-c", cmd, NULL};
5681
5682 pid_t pid = fork();
5683
5684 if (pid < 0) {
5685 // fork failed
5686 return -1;
5687
5688 } else if (pid == 0) {
5689 // child process
5690
5691 execve("/bin/sh", (char* const*)argv, environ);
5692
5693 // execve failed
5694 _exit(-1);
5695
5696 } else {
5697 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't
5698 // care about the actual exit code, for now.
5699
5700 int status;
5701
5702 // Wait for the child process to exit. This returns immediately if
|
5659
5660 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
5661 if (fd != -1) {
5662 struct stat buf;
5663 ::close(fd);
5664 while (::stat(filename, &buf) == 0) {
5665 (void)::poll(NULL, 0, 100);
5666 }
5667 } else {
5668 jio_fprintf(stderr,
5669 "Could not open pause file '%s', continuing immediately.\n", filename);
5670 }
5671 }
5672
5673 extern char** environ;
5674
5675 // Run the specified command in a separate process. Return its exit value,
5676 // or -1 on failure (e.g. can't fork a new process).
5677 // Unlike system(), this function can be called from signal handler. It
5678 // doesn't block SIGINT et al.
5679 int os::fork_and_exec(char* cmd, bool use_vfork_if_available) {
5680 const char * argv[4] = {"sh", "-c", cmd, NULL};
5681
5682 pid_t pid ;
5683
5684 if (use_vfork_if_available) {
5685 pid = vfork();
5686 } else {
5687 pid = fork();
5688 }
5689
5690 if (pid < 0) {
5691 // fork failed
5692 return -1;
5693
5694 } else if (pid == 0) {
5695 // child process
5696
5697 execve("/bin/sh", (char* const*)argv, environ);
5698
5699 // execve failed
5700 _exit(-1);
5701
5702 } else {
5703 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't
5704 // care about the actual exit code, for now.
5705
5706 int status;
5707
5708 // Wait for the child process to exit. This returns immediately if
|