2 * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
20 static void pre_exec(void *d)
22 struct dog_data *data = d;
25 dup2(data->stdout, 1);
26 dup2(data->stdout, 2);
27 os_close_file(data->stdin);
28 os_close_file(data->stdout);
29 os_close_file(data->close_me[0]);
30 os_close_file(data->close_me[1]);
33 int start_watchdog(int *in_fd_ret, int *out_fd_ret, char *sock)
36 int in_fds[2], out_fds[2], pid, n, err;
37 char pid_buf[sizeof("nnnnn\0")], c;
38 char *pid_args[] = { "/usr/bin/uml_watchdog", "-pid", pid_buf, NULL };
39 char *mconsole_args[] = { "/usr/bin/uml_watchdog", "-mconsole", NULL,
43 err = os_pipe(in_fds, 1, 0);
45 printk("harddog_open - os_pipe failed, err = %d\n", -err);
49 err = os_pipe(out_fds, 1, 0);
51 printk("harddog_open - os_pipe failed, err = %d\n", -err);
55 data.stdin = out_fds[0];
56 data.stdout = in_fds[1];
57 data.close_me[0] = out_fds[1];
58 data.close_me[1] = in_fds[0];
61 mconsole_args[2] = sock;
65 /* XXX The os_getpid() is not SMP correct */
66 sprintf(pid_buf, "%d", os_getpid());
70 pid = run_helper(pre_exec, &data, args);
72 os_close_file(out_fds[0]);
73 os_close_file(in_fds[1]);
77 printk("harddog_open - run_helper failed, errno = %d\n", -err);
81 n = os_read_file(in_fds[0], &c, sizeof(c));
83 printk("harddog_open - EOF on watchdog pipe\n");
89 printk("harddog_open - read of watchdog pipe failed, "
95 *in_fd_ret = in_fds[0];
96 *out_fd_ret = out_fds[1];
100 os_close_file(in_fds[0]);
101 os_close_file(in_fds[1]);
103 os_close_file(out_fds[0]);
104 os_close_file(out_fds[1]);
109 void stop_watchdog(int in_fd, int out_fd)
111 os_close_file(in_fd);
112 os_close_file(out_fd);
115 int ping_watchdog(int fd)
120 n = os_write_file(fd, &c, sizeof(c));
122 printk("ping_watchdog - write failed, err = %d\n", -n);