migrate fully to meson build system

- drop old build system
- move shared include and source files to common directory
- drop "rc-" prefix from shared include and source files
- move executable-specific code to individual directories under src
- adjust top-level .gitignore file for new build system

This closes #489.

1 files changed, 1250 insertions, 0 deletions

diff --git a/src/supervise-daemon/supervise-daemon.c b/src/supervise-daemon/supervise-daemon.c
new file mode 100644
index 00000000..194ef9df
--- /dev/null
+++ b/src/supervise-daemon/supervise-daemon.c
@@ -0,0 +1,1250 @@
+/*
+ * supervise-daemon
+ * This is a supervisor for daemons.
+ * It will start a deamon and make sure it restarts if it crashes.
+ */
+
+/*
+ * Copyright (c) 2016 The OpenRC Authors.
+ * See the Authors file at the top-level directory of this distribution and
+ * https://github.com/OpenRC/openrc/blob/HEAD/AUTHORS
+ *
+ * This file is part of OpenRC. It is subject to the license terms in
+ * the LICENSE file found in the top-level directory of this
+ * distribution and at https://github.com/OpenRC/openrc/blob/HEAD/LICENSE
+ * This file may not be copied, modified, propagated, or distributed
+ *    except according to the terms contained in the LICENSE file.
+ */
+
+/* nano seconds */
+#define POLL_INTERVAL   20000000
+#define WAIT_PIDFILE   500000000
+#define ONE_SECOND    1000000000
+#define ONE_MS           1000000
+
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/resource.h>
+#include <sys/stat.h>
+#include <termios.h>
+#include <sys/time.h>
+#include <sys/wait.h>
+
+#ifdef __linux__
+#include <sys/syscall.h> /* For io priority */
+#include <sys/prctl.h> /* For prctl */
+#endif
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <limits.h>
+#include <grp.h>
+#include <pwd.h>
+#include <signal.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <syslog.h>
+#include <time.h>
+#include <unistd.h>
+
+#ifdef HAVE_PAM
+#include <security/pam_appl.h>
+
+/* We are not supporting authentication conversations */
+static struct pam_conv conv = { NULL, NULL};
+#endif
+
+#ifdef HAVE_CAP
+#include <sys/capability.h>
+#endif
+
+#include "einfo.h"
+#include "queue.h"
+#include "rc.h"
+#include "misc.h"
+#include "plugin.h"
+#include "schedules.h"
+#include "_usage.h"
+#include "helpers.h"
+
+/* Use long option value that is out of range for 8 bit getopt values.
+ * The exact enum value is internal and can freely change, so we keep the
+ * options sorted.
+ */
+enum {
+  /* This has to come first so following values stay in the 0x100+ range. */
+  LONGOPT_BASE = 0x100,
+
+  LONGOPT_CAPABILITIES,
+  LONGOPT_OOM_SCORE_ADJ,
+  LONGOPT_NO_NEW_PRIVS,
+  LONGOPT_SECBITS,
+};
+
+const char *applet = NULL;
+const char *extraopts = NULL;
+const char getoptstring[] = "A:a:D:d:e:g:H:I:Kk:m:N:p:R:r:s:Su:1:2:3" \
+	getoptstring_COMMON;
+const struct option longopts[] = {
+	{ "healthcheck-timer",        1, NULL, 'a'},
+	{ "healthcheck-delay",        1, NULL, 'A'},
+	{ "capabilities", 1, NULL, LONGOPT_CAPABILITIES},
+	{ "secbits",      1, NULL, LONGOPT_SECBITS},
+	{ "no-new-privs", 0, NULL, LONGOPT_NO_NEW_PRIVS},
+	{ "respawn-delay",        1, NULL, 'D'},
+	{ "chdir",        1, NULL, 'd'},
+	{ "env",          1, NULL, 'e'},
+	{ "group",        1, NULL, 'g'},
+	{ "ionice",       1, NULL, 'I'},
+	{ "stop",         0, NULL, 'K'},
+	{ "umask",        1, NULL, 'k'},
+	{ "respawn-max",    1, NULL, 'm'},
+	{ "nicelevel",    1, NULL, 'N'},
+	{ "oom-score-adj",1, NULL, LONGOPT_OOM_SCORE_ADJ},
+	{ "pidfile",      1, NULL, 'p'},
+	{ "respawn-period",        1, NULL, 'P'},
+	{ "retry",       1, NULL, 'R'},
+	{ "chroot",       1, NULL, 'r'},
+	{ "signal",       1, NULL, 's'},
+	{ "start",        0, NULL, 'S'},
+	{ "user",         1, NULL, 'u'},
+	{ "stdout",       1, NULL, '1'},
+	{ "stderr",       1, NULL, '2'},
+	{ "reexec",       0, NULL, '3'},
+	longopts_COMMON
+};
+const char * const longopts_help[] = {
+	"set an initial health check delay",
+	"set a health check timer",
+	"Set the inheritable, ambient and bounding capabilities",
+	"Set the security-bits for the program",
+	"Set the No New Privs flag for the program",
+	"Set a respawn delay",
+	"Change the PWD",
+	"Set an environment string",
+	"Change the process group",
+	"Set an ionice class:data when starting",
+	"Stop daemon",
+	"Set the umask for the daemon",
+	"set maximum number of respawn attempts",
+	"Set a nicelevel when starting",
+	"Set OOM score adjustment when starting",
+	"Match pid found in this file",
+	"Set respawn time period",
+	"Retry schedule to use when stopping",
+	"Chroot to this directory",
+	"Send a signal to the daemon",
+	"Start daemon",
+	"Change the process user",
+	"Redirect stdout to file",
+	"Redirect stderr to file",
+	"reexec (used internally)",
+	longopts_help_COMMON
+};
+const char *usagestring = NULL;
+
+static int healthcheckdelay = 0;
+static int healthchecktimer = 0;
+static volatile sig_atomic_t do_healthcheck = 0;
+static volatile sig_atomic_t exiting = 0;
+static int nicelevel = INT_MIN;
+static int ionicec = -1;
+static int ioniced = 0;
+static int oom_score_adj = INT_MIN;
+static char *changeuser, *ch_root, *ch_dir;
+static uid_t uid = 0;
+static gid_t gid = 0;
+static int devnull_fd = -1;
+static int stdin_fd;
+static int stdout_fd;
+static int stderr_fd;
+static char *redirect_stderr = NULL;
+static char *redirect_stdout = NULL;
+#ifdef TIOCNOTTY
+static int tty_fd = -1;
+#endif
+static pid_t child_pid;
+static int respawn_count = 0;
+static int respawn_delay = 0;
+static int respawn_max = 10;
+static int respawn_period = 0;
+static char *fifopath = NULL;
+static int fifo_fd = 0;
+static char *pidfile = NULL;
+static char *svcname = NULL;
+static bool verbose = false;
+#ifdef HAVE_CAP
+static cap_iab_t cap_iab = NULL;
+static unsigned secbits = 0;
+#endif
+#ifdef PR_SET_NO_NEW_PRIVS
+static bool no_new_privs = false;
+#endif
+
+extern char **environ;
+
+#if !defined(SYS_ioprio_set) && defined(__NR_ioprio_set)
+# define SYS_ioprio_set __NR_ioprio_set
+#endif
+#if !defined(__DragonFly__)
+static inline int ioprio_set(int which _unused, int who _unused,
+			     int ioprio _unused)
+{
+#ifdef SYS_ioprio_set
+	return syscall(SYS_ioprio_set, which, who, ioprio);
+#else
+	return 0;
+#endif
+}
+#endif
+
+static void cleanup(void)
+{
+	free(changeuser);
+}
+
+static void re_exec_supervisor(void)
+{
+	syslog(LOG_WARNING, "Re-executing for %s", svcname);
+	execlp("supervise-daemon", "supervise-daemon", svcname, "--reexec",
+			(char *) NULL);
+	syslog(LOG_ERR, "Unable to execute supervise-daemon: %s",
+			strerror(errno));
+	exit(EXIT_FAILURE);
+}
+
+static void handle_signal(int sig)
+{
+	int serrno = errno;
+	pid_t pid;
+
+	switch (sig) {
+	case SIGALRM:
+		do_healthcheck = 1;
+		break;
+	case SIGCHLD:
+		if (exiting)
+			while (waitpid((pid_t)(-1), NULL, WNOHANG) > 0) {}
+		else {
+			while ((pid = waitpid((pid_t)(-1), NULL, WNOHANG|WNOWAIT)) > 0) {
+				if (pid == child_pid)
+					break;
+				pid = waitpid(pid, NULL, WNOHANG);
+			}
+		}
+		break;
+	case SIGTERM:
+		exiting = 1;
+		break;
+	default:
+		syslog(LOG_WARNING, "caught signal %d", sig);
+		re_exec_supervisor();
+	}
+	/* Restore errno */
+	errno = serrno;
+}
+
+static char * expand_home(const char *home, const char *path)
+{
+	char *opath, *ppath, *p, *nh;
+	struct passwd *pw;
+
+	if (!path || *path != '~')
+		return xstrdup(path);
+
+	opath = ppath = xstrdup(path);
+	if (ppath[1] != '/' && ppath[1] != '\0') {
+		p = strchr(ppath + 1, '/');
+		if (p)
+			*p = '\0';
+		pw = getpwnam(ppath + 1);
+		if (pw) {
+			home = pw->pw_dir;
+			ppath = p;
+			if (ppath)
+				*ppath = '/';
+		} else
+			home = NULL;
+	} else
+		ppath++;
+
+	if (!home) {
+		free(opath);
+		return xstrdup(path);
+	}
+	if (!ppath) {
+		free(opath);
+		return xstrdup(home);
+	}
+
+	xasprintf(&nh, "%s%s", home, ppath);
+	free(opath);
+	return nh;
+}
+
+static char *make_cmdline(char **argv)
+{
+	char **c;
+	char *cmdline = NULL;
+	size_t len = 0;
+
+	for (c = argv; c && *c; c++)
+		len += (strlen(*c) + 1);
+	cmdline = xmalloc(len+1);
+	memset(cmdline, 0, len+1);
+	for (c = argv; c && *c; c++) {
+		strcat(cmdline, *c);
+		strcat(cmdline, " ");
+	}
+	return cmdline;
+}
+
+static pid_t exec_command(const char *cmd)
+{
+	char *file;
+	pid_t pid = -1;
+	sigset_t full;
+	sigset_t old;
+	struct sigaction sa;
+
+	file = rc_service_resolve(svcname);
+	if (!exists(file)) {
+		free(file);
+		return 0;
+	}
+
+	/* We need to block signals until we have forked */
+	memset(&sa, 0, sizeof (sa));
+	sa.sa_handler = SIG_DFL;
+	sigemptyset(&sa.sa_mask);
+	sigfillset(&full);
+	sigprocmask(SIG_SETMASK, &full, &old);
+
+	pid = fork();
+	if (pid == 0) {
+		/* Restore default handlers */
+		sigaction(SIGCHLD, &sa, NULL);
+		sigaction(SIGHUP, &sa, NULL);
+		sigaction(SIGINT, &sa, NULL);
+		sigaction(SIGQUIT, &sa, NULL);
+		sigaction(SIGTERM, &sa, NULL);
+		sigaction(SIGUSR1, &sa, NULL);
+		sigaction(SIGWINCH, &sa, NULL);
+
+		/* Unmask signals */
+		sigprocmask(SIG_SETMASK, &old, NULL);
+
+		/* Safe to run now */
+		execl(file, file, cmd, (char *) NULL);
+		syslog(LOG_ERR, "unable to exec `%s': %s\n",
+		    file, strerror(errno));
+		_exit(EXIT_FAILURE);
+	}
+
+	if (pid == -1)
+		syslog(LOG_ERR, "fork: %s\n",strerror (errno));
+
+	sigprocmask(SIG_SETMASK, &old, NULL);
+	free(file);
+	return pid;
+}
+
+static void child_process(char *exec, char **argv)
+{
+	RC_STRINGLIST *env_list;
+	RC_STRING *env;
+	int i;
+	char *p;
+	char *token;
+	size_t len;
+	char *newpath;
+	char *np;
+	char *cmdline = NULL;
+	time_t start_time;
+	char start_count_string[20];
+	char start_time_string[20];
+	FILE *fp;
+
+#ifdef HAVE_PAM
+	pam_handle_t *pamh = NULL;
+	int pamr;
+	const char *const *pamenv = NULL;
+#endif
+
+	setsid();
+
+	if (svcname) {
+		start_time = time(NULL);
+		from_time_t(start_time_string, start_time);
+		rc_service_value_set(svcname, "start_time", start_time_string);
+		sprintf(start_count_string, "%i", respawn_count);
+		rc_service_value_set(svcname, "start_count", start_count_string);
+		sprintf(start_count_string, "%d", getpid());
+		rc_service_value_set(svcname, "child_pid", start_count_string);
+	}
+
+	if (nicelevel != INT_MIN) {
+		if (setpriority(PRIO_PROCESS, getpid(), nicelevel) == -1)
+			eerrorx("%s: setpriority %d: %s", applet, nicelevel,
+					strerror(errno));
+	}
+
+	if (ionicec != -1 && ioprio_set(1, getpid(), ionicec | ioniced) == -1)
+		eerrorx("%s: ioprio_set %d %d: %s", applet, ionicec, ioniced,
+				strerror(errno));
+
+	if (oom_score_adj != INT_MIN) {
+		fp = fopen("/proc/self/oom_score_adj", "w");
+		if (!fp)
+			eerrorx("%s: oom_score_adj %d: %s", applet,
+			    oom_score_adj, strerror(errno));
+		fprintf(fp, "%d\n", oom_score_adj);
+		fclose(fp);
+	}
+
+	if (ch_root && chroot(ch_root) < 0)
+		eerrorx("%s: chroot `%s': %s", applet, ch_root, strerror(errno));
+
+	if (ch_dir && chdir(ch_dir) < 0)
+		eerrorx("%s: chdir `%s': %s", applet, ch_dir, strerror(errno));
+
+#ifdef HAVE_PAM
+	if (changeuser != NULL) {
+		pamr = pam_start("supervise-daemon",
+		    changeuser, &conv, &pamh);
+
+		if (pamr == PAM_SUCCESS)
+			pamr = pam_acct_mgmt(pamh, PAM_SILENT);
+		if (pamr == PAM_SUCCESS)
+			pamr = pam_open_session(pamh, PAM_SILENT);
+		if (pamr != PAM_SUCCESS)
+			eerrorx("%s: pam error: %s", applet, pam_strerror(pamh, pamr));
+	}
+#endif
+
+	if (gid && setgid(gid))
+		eerrorx("%s: unable to set groupid to %d", applet, gid);
+	if (changeuser && initgroups(changeuser, gid))
+		eerrorx("%s: initgroups (%s, %d)", applet, changeuser, gid);
+#ifdef HAVE_CAP
+	if (uid && cap_setuid(uid))
+#else
+	if (uid && setuid(uid))
+#endif
+		eerrorx ("%s: unable to set userid to %d", applet, uid);
+
+	/* Close any fd's to the passwd database */
+	endpwent();
+
+#ifdef HAVE_CAP
+	if (cap_iab != NULL) {
+		i = cap_iab_set_proc(cap_iab);
+
+		if (cap_free(cap_iab) != 0)
+			eerrorx("Could not releasable memory: %s", strerror(errno));
+
+		if (i != 0)
+			eerrorx("Could not set iab: %s", strerror(errno));
+	}
+
+	if (secbits != 0) {
+		if (cap_set_secbits(secbits) < 0)
+			eerrorx("Could not set securebits to 0x%x: %s", secbits, strerror(errno));
+	}
+#endif
+
+#ifdef PR_SET_NO_NEW_PRIVS
+	if (no_new_privs) {
+		if (prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0) == -1)
+			eerrorx("Could not set No New Privs flag: %s", strerror(errno));
+	}
+#endif
+
+	/* remove the controlling tty */
+#ifdef TIOCNOTTY
+	ioctl(tty_fd, TIOCNOTTY, 0);
+	close(tty_fd);
+#endif
+
+	/* Clean the environment of any RC_ variables */
+	env_list = rc_stringlist_new();
+	i = 0;
+	while (environ[i])
+		rc_stringlist_add(env_list, environ[i++]);
+
+#ifdef HAVE_PAM
+	if (changeuser != NULL) {
+		pamenv = (const char *const *)pam_getenvlist(pamh);
+		if (pamenv) {
+			while (*pamenv) {
+				/* Don't add strings unless they set a var */
+				if (strchr(*pamenv, '='))
+					putenv(xstrdup(*pamenv));
+				else
+					unsetenv(*pamenv);
+				pamenv++;
+			}
+		}
+	}
+#endif
+
+	TAILQ_FOREACH(env, env_list, entries) {
+		if ((strncmp(env->value, "RC_", 3) == 0 &&
+			strncmp(env->value, "RC_SERVICE=", 11) != 0 &&
+			strncmp(env->value, "RC_SVCNAME=", 11) != 0) ||
+		    strncmp(env->value, "SSD_NICELEVEL=", 14) == 0 ||
+		    strncmp(env->value, "SSD_IONICELEVEL=", 16) == 0 ||
+		    strncmp(env->value, "SSD_OOM_SCORE_ADJ=", 18) == 0)
+		{
+			p = strchr(env->value, '=');
+			*p = '\0';
+			unsetenv(env->value);
+			continue;
+		}
+	}
+	rc_stringlist_free(env_list);
+
+	/* For the path, remove the rcscript bin dir from it */
+	if ((token = getenv("PATH"))) {
+		len = strlen(token);
+		newpath = np = xmalloc(len + 1);
+		while (token && *token) {
+			p = strchr(token, ':');
+			if (p) {
+				*p++ = '\0';
+				while (*p == ':')
+					p++;
+			}
+			if (strcmp(token, RC_LIBEXECDIR "/bin") != 0 &&
+			    strcmp(token, RC_LIBEXECDIR "/sbin") != 0)
+			{
+				len = strlen(token);
+				if (np != newpath)
+					*np++ = ':';
+				memcpy(np, token, len);
+				np += len;
+				}
+			token = p;
+		}
+		*np = '\0';
+		unsetenv("PATH");
+		setenv("PATH", newpath, 1);
+	}
+
+	stdin_fd = devnull_fd;
+	stdout_fd = devnull_fd;
+	stderr_fd = devnull_fd;
+	if (redirect_stdout) {
+		if ((stdout_fd = open(redirect_stdout,
+			    O_WRONLY | O_CREAT | O_APPEND,
+			    S_IRUSR | S_IWUSR)) == -1)
+			eerrorx("%s: unable to open the logfile"
+				    " for stdout `%s': %s",
+				    applet, redirect_stdout, strerror(errno));
+	}
+	if (redirect_stderr) {
+		if ((stderr_fd = open(redirect_stderr,
+			    O_WRONLY | O_CREAT | O_APPEND,
+			    S_IRUSR | S_IWUSR)) == -1)
+			eerrorx("%s: unable to open the logfile"
+			    " for stderr `%s': %s",
+			    applet, redirect_stderr, strerror(errno));
+	}
+
+	dup2(stdin_fd, STDIN_FILENO);
+	if (redirect_stdout || rc_yesno(getenv("EINFO_QUIET")))
+		dup2(stdout_fd, STDOUT_FILENO);
+	if (redirect_stderr || rc_yesno(getenv("EINFO_QUIET")))
+		dup2(stderr_fd, STDERR_FILENO);
+
+	for (i = getdtablesize() - 1; i >= 3; --i)
+		fcntl(i, F_SETFD, FD_CLOEXEC);
+	cmdline = make_cmdline(argv);
+	syslog(LOG_INFO, "Child command line: %s", cmdline);
+	free(cmdline);
+	execvp(exec, argv);
+
+#ifdef HAVE_PAM
+	if (changeuser != NULL && pamr == PAM_SUCCESS)
+		pam_close_session(pamh, PAM_SILENT);
+#endif
+	eerrorx("%s: failed to exec `%s': %s", applet, exec,strerror(errno));
+}
+
+static void supervisor(char *exec, char **argv)
+{
+	FILE *fp;
+	char buf[2048];
+	char cmd[2048];
+	int count;
+	int failing;
+	int health_status;
+	int healthcheck_respawn;
+	int i;
+	int nkilled;
+	int sig_send;
+	pid_t health_pid;
+	pid_t wait_pid;
+	sigset_t old_signals;
+	sigset_t signals;
+	struct sigaction sa;
+	struct timespec ts;
+	time_t respawn_now= 0;
+	time_t first_spawn= 0;
+
+	/* block all signals we do not handle */
+	sigfillset(&signals);
+	sigdelset(&signals, SIGALRM);
+	sigdelset(&signals, SIGCHLD);
+	sigdelset(&signals, SIGTERM);
+	sigprocmask(SIG_SETMASK, &signals, &old_signals);
+
+	/* install signal  handler */
+	memset(&sa, 0, sizeof(sa));
+	sa.sa_handler = handle_signal;
+	sigaction(SIGALRM, &sa, NULL);
+	sigaction(SIGCHLD, &sa, NULL);
+	sigaction(SIGTERM, &sa, NULL);
+
+	fp = fopen(pidfile, "w");
+	if (!fp)
+		eerrorx("%s: fopen `%s': %s", applet, pidfile, strerror(errno));
+	fprintf(fp, "%d\n", getpid());
+	fclose(fp);
+
+	if (svcname)
+		rc_service_daemon_set(svcname, exec, (const char * const *) argv,
+				pidfile, true);
+
+	/* remove the controlling tty */
+#ifdef TIOCNOTTY
+	ioctl(tty_fd, TIOCNOTTY, 0);
+	close(tty_fd);
+#endif
+
+	/*
+	 * Supervisor main loop
+	 */
+	if (healthcheckdelay)
+		alarm(healthcheckdelay);
+	else if (healthchecktimer)
+		alarm(healthchecktimer);
+	failing = 0;
+	while (!exiting) {
+		healthcheck_respawn = 0;
+		fifo_fd = open(fifopath, O_RDONLY);
+		if (fifo_fd > 0) {
+			memset(buf, 0, sizeof(buf));
+			count = read(fifo_fd, buf, sizeof(buf) - 1);
+			close(fifo_fd);
+			if (count != -1)
+				buf[count] = 0;
+			if (count == 0)
+				continue;
+			if (verbose)
+				syslog(LOG_DEBUG, "Received %s from fifo", buf);
+			if (strncasecmp(buf, "sig", 3) == 0) {
+				if ((sscanf(buf, "%s %d", cmd, &sig_send) == 2)
+						&& (sig_send >= 0 && sig_send < NSIG)) {
+					syslog(LOG_INFO, "Sending signal %d to %d", sig_send,
+							child_pid);
+					if (kill(child_pid, sig_send) == -1)
+						syslog(LOG_ERR, "Unable to send signal %d to %d",
+								sig_send, child_pid);
+				}
+			}
+			continue;
+		}
+		if (do_healthcheck) {
+			do_healthcheck = 0;
+			alarm(0);
+			if (verbose)
+				syslog(LOG_DEBUG, "running health check for %s", svcname);
+			health_pid = exec_command("healthcheck");
+			health_status = rc_waitpid(health_pid);
+			if (WIFEXITED(health_status) && WEXITSTATUS(health_status) == 0)
+				alarm(healthchecktimer);
+			else {
+				syslog(LOG_WARNING, "health check for %s failed", svcname);
+				health_pid = exec_command("unhealthy");
+				rc_waitpid(health_pid);
+				syslog(LOG_INFO, "stopping %s, pid %d", exec, child_pid);
+				nkilled = run_stop_schedule(applet, NULL, NULL, child_pid, 0,
+						false, false, true);
+				if (nkilled < 0)
+					syslog(LOG_INFO, "Unable to kill %d: %s",
+							child_pid, strerror(errno));
+				else
+					healthcheck_respawn = 1;
+			}
+		}
+		if (exiting) {
+			alarm(0);
+			syslog(LOG_INFO, "stopping %s, pid %d", exec, child_pid);
+			nkilled = run_stop_schedule(applet, NULL, NULL, child_pid, 0,
+					false, false, true);
+			if (nkilled > 0)
+				syslog(LOG_INFO, "killed %d processes", nkilled);
+			continue;
+		}
+		wait_pid = waitpid(child_pid, &i, WNOHANG);
+		if (wait_pid == child_pid) {
+			if (WIFEXITED(i))
+				syslog(LOG_WARNING, "%s, pid %d, exited with return code %d",
+						exec, child_pid, WEXITSTATUS(i));
+			else if (WIFSIGNALED(i))
+				syslog(LOG_WARNING, "%s, pid %d, terminated by signal %d",
+						exec, child_pid, WTERMSIG(i));
+		}
+		if (wait_pid == child_pid || healthcheck_respawn) {
+			do_healthcheck = 0;
+			healthcheck_respawn = 0;
+			alarm(0);
+			respawn_now = time(NULL);
+			if (first_spawn == 0)
+				first_spawn = respawn_now;
+			if ((respawn_period > 0)
+					&& (respawn_now - first_spawn > respawn_period)) {
+				respawn_count = 0;
+				first_spawn = 0;
+			} else
+				respawn_count++;
+			if (respawn_max > 0 && respawn_count > respawn_max) {
+				syslog(LOG_WARNING, "respawned \"%s\" too many times, exiting",
+						exec);
+				exiting = 1;
+				failing = 1;
+				continue;
+			}
+			ts.tv_sec = respawn_delay;
+			ts.tv_nsec = 0;
+			nanosleep(&ts, NULL);
+			if (exiting)
+				continue;
+			child_pid = fork();
+			if (child_pid == -1) {
+				syslog(LOG_ERR, "%s: fork: %s", applet, strerror(errno));
+				exit(EXIT_FAILURE);
+			}
+			if (child_pid == 0) {
+				sigprocmask(SIG_SETMASK, &old_signals, NULL);
+				memset(&sa, 0, sizeof(sa));
+				sa.sa_handler = SIG_DFL;
+				sigaction(SIGALRM, &sa, NULL);
+				sigaction(SIGCHLD, &sa, NULL);
+				sigaction(SIGTERM, &sa, NULL);
+				child_process(exec, argv);
+			}
+			if (healthcheckdelay)
+				alarm(healthcheckdelay);
+			else if (healthchecktimer)
+				alarm(healthchecktimer);
+		}
+	}
+
+	if (svcname) {
+		rc_service_daemon_set(svcname, exec, (const char *const *)argv,
+				pidfile, false);
+		rc_service_value_set(svcname, "child_pid", NULL);
+		rc_service_mark(svcname, RC_SERVICE_STOPPED);
+		if (failing)
+			rc_service_mark(svcname, RC_SERVICE_FAILED);
+	}
+	if (pidfile && exists(pidfile))
+		unlink(pidfile);
+	if (fifopath && exists(fifopath))
+		unlink(fifopath);
+	exit(EXIT_SUCCESS);
+}
+
+int main(int argc, char **argv)
+{
+	int opt;
+	char **c;
+	int x;
+	bool start = false;
+	bool stop = false;
+	bool reexec = false;
+	bool sendsig = false;
+	char *exec = NULL;
+	char *retry = NULL;
+	int sig = SIGTERM;
+	char *home = NULL;
+	int tid = 0;
+	pid_t pid;
+	char *tmp;
+	char *p;
+	char *token;
+	int i;
+	int n;
+	char *exec_file = NULL;
+	char *varbuf = NULL;
+	struct timespec ts;
+	struct passwd *pw;
+	struct group *gr;
+	FILE *fp;
+	mode_t numask = 022;
+	int child_argc = 0;
+	char **child_argv = NULL;
+	char *str = NULL;
+	char *cmdline = NULL;
+
+	applet = basename_c(argv[0]);
+	atexit(cleanup);
+	svcname = getenv("RC_SVCNAME");
+	if (!svcname)
+		eerrorx("%s: The RC_SVCNAME environment variable is not set", applet);
+	openlog(applet, LOG_PID, LOG_DAEMON);
+
+	if (argc <= 1 || strcmp(argv[1], svcname))
+		eerrorx("%s: the first argument is %s and must be %s",
+				applet, argv[1], svcname);
+
+	if ((tmp = getenv("SSD_NICELEVEL")))
+		if (sscanf(tmp, "%d", &nicelevel) != 1)
+			eerror("%s: invalid nice level `%s' (SSD_NICELEVEL)",
+			    applet, tmp);
+	if ((tmp = getenv("SSD_IONICELEVEL"))) {
+		int n = sscanf(tmp, "%d:%d", &ionicec, &ioniced);
+		if (n != 1 && n != 2)
+			eerror("%s: invalid ionice level `%s' (SSD_IONICELEVEL)",
+			    applet, tmp);
+		if (ionicec == 0)
+			ioniced = 0;
+		else if (ionicec == 3)
+			ioniced = 7;
+		ionicec <<= 13; /* class shift */
+	}
+	if ((tmp = getenv("SSD_OOM_SCORE_ADJ")))
+		if (sscanf(tmp, "%d", &oom_score_adj) != 1)
+			eerror("%s: invalid oom_score_adj `%s' (SSD_OOM_SCORE_ADJ)",
+			    applet, tmp);
+
+	/* Get our user name and initial dir */
+	p = getenv("USER");
+	home = getenv("HOME");
+	if (home == NULL || p == NULL) {
+		pw = getpwuid(getuid());
+		if (pw != NULL) {
+			if (p == NULL)
+				setenv("USER", pw->pw_name, 1);
+			if (home == NULL) {
+				setenv("HOME", pw->pw_dir, 1);
+				home = pw->pw_dir;
+			}
+		}
+	}
+
+	cmdline = make_cmdline(argv);
+	if (svcname) {
+		argc--;
+		argv++;
+	}
+	while ((opt = getopt_long(argc, argv, getoptstring, longopts,
+		    (int *) 0)) != -1)
+		switch (opt) {
+		case 'a':  /* --healthcheck-timer <time> */
+			if (sscanf(optarg, "%d", &healthchecktimer) != 1 || healthchecktimer < 1)
+				eerrorx("%s: invalid health check timer %s", applet, optarg);
+			break;
+
+		case 'A':  /* --healthcheck-delay <time> */
+			if (sscanf(optarg, "%d", &healthcheckdelay) != 1 || healthcheckdelay < 1)
+				eerrorx("%s: invalid health check delay %s", applet, optarg);
+			break;
+
+		case LONGOPT_CAPABILITIES:
+#ifdef HAVE_CAP
+			cap_iab = cap_iab_from_text(optarg);
+			if (cap_iab == NULL)
+				eerrorx("Could not parse iab: %s", strerror(errno));
+#else
+			eerrorx("Capabilities support not enabled");
+#endif
+			break;
+
+        case LONGOPT_SECBITS:
+#ifdef HAVE_CAP
+			if (*optarg == '\0')
+				eerrorx("Secbits are empty");
+
+			tmp = NULL;
+			secbits = strtoul(optarg, &tmp, 0);
+			if (*tmp != '\0')
+				eerrorx("Could not parse secbits: invalid char %c", *tmp);
+#else
+			eerrorx("Capabilities support not enabled");
+#endif
+			break;
+
+		case LONGOPT_NO_NEW_PRIVS:
+#ifdef PR_SET_NO_NEW_PRIVS
+			no_new_privs = true;
+#else
+			eerrorx("The No New Privs flag is only supported by Linux (since 3.5)");
+#endif
+			break;
+
+		case 'D':  /* --respawn-delay time */
+			n = sscanf(optarg, "%d", &respawn_delay);
+			if (n	!= 1 || respawn_delay < 1)
+				eerrorx("Invalid respawn-delay value '%s'", optarg);
+			break;
+
+		case 'I': /* --ionice */
+			if (sscanf(optarg, "%d:%d", &ionicec, &ioniced) == 0)
+				eerrorx("%s: invalid ionice `%s'",
+				    applet, optarg);
+			if (ionicec == 0)
+				ioniced = 0;
+			else if (ionicec == 3)
+				ioniced = 7;
+			ionicec <<= 13; /* class shift */
+			break;
+
+		case 'K':  /* --stop */
+			stop = true;
+			break;
+
+		case 'N':  /* --nice */
+			if (sscanf(optarg, "%d", &nicelevel) != 1)
+				eerrorx("%s: invalid nice level `%s'",
+				    applet, optarg);
+			break;
+
+		case LONGOPT_OOM_SCORE_ADJ: /* --oom-score-adj */
+			if (sscanf(optarg, "%d", &oom_score_adj) != 1)
+				eerrorx("%s: invalid oom-score-adj `%s'",
+				    applet, optarg);
+			break;
+
+		case 'P':  /* --respawn-period time */
+			n = sscanf(optarg, "%d", &respawn_period);
+			if (n	!= 1 || respawn_period < 1)
+				eerrorx("Invalid respawn-period value '%s'", optarg);
+			break;
+
+		case 's':  /* --signal */
+			sig = parse_signal(applet, optarg);
+			sendsig = true;
+			break;
+		case 'S':  /* --start */
+			start = true;
+			break;
+
+		case 'd':  /* --chdir /new/dir */
+			ch_dir = optarg;
+			break;
+
+		case 'e': /* --env */
+			putenv(optarg);
+			break;
+
+		case 'g':  /* --group <group>|<gid> */
+			if (sscanf(optarg, "%d", &tid) != 1)
+				gr = getgrnam(optarg);
+			else
+				gr = getgrgid((gid_t)tid);
+			if (gr == NULL)
+				eerrorx("%s: group `%s' not found",
+				    applet, optarg);
+			gid = gr->gr_gid;
+			break;
+
+		case 'H':  /* --healthcheck-timer <minutes> */
+			if (sscanf(optarg, "%d", &healthchecktimer) != 1 || healthchecktimer < 1)
+				eerrorx("%s: invalid health check timer %s", applet, optarg);
+			break;
+
+		case 'k':
+			if (parse_mode(&numask, optarg))
+				eerrorx("%s: invalid mode `%s'",
+				    applet, optarg);
+			break;
+
+		case 'm':  /* --respawn-max count */
+			n = sscanf(optarg, "%d", &respawn_max);
+			if (n	!= 1 || respawn_max < 0)
+				eerrorx("Invalid respawn-max value '%s'", optarg);
+			break;
+
+		case 'p':  /* --pidfile <pid-file> */
+			pidfile = optarg;
+			break;
+
+		case 'R':  /* --retry <schedule>|timeout */
+			retry = optarg;
+			break;
+		case 'r':  /* --chroot /new/root */
+			ch_root = optarg;
+			break;
+
+		case 'u':  /* --user <username>|<uid> */
+		{
+			char dummy[2];
+			p = optarg;
+			tmp = strsep(&p, ":");
+			changeuser = xstrdup(tmp);
+			if (sscanf(tmp, "%d%1s", &tid, dummy) != 1)
+				pw = getpwnam(tmp);
+			else
+				pw = getpwuid((uid_t)tid);
+
+			if (pw == NULL)
+				eerrorx("%s: user `%s' not found",
+				    applet, tmp);
+			uid = pw->pw_uid;
+			home = pw->pw_dir;
+			unsetenv("HOME");
+			if (pw->pw_dir)
+				setenv("HOME", pw->pw_dir, 1);
+			unsetenv("USER");
+			if (pw->pw_name)
+				setenv("USER", pw->pw_name, 1);
+			if (gid == 0)
+				gid = pw->pw_gid;
+
+			if (p) {
+				tmp = strsep (&p, ":");
+				if (sscanf(tmp, "%d%1s", &tid, dummy) != 1)
+					gr = getgrnam(tmp);
+				else
+					gr = getgrgid((gid_t) tid);
+
+				if (gr == NULL)
+					eerrorx("%s: group `%s'"
+					    " not found",
+					    applet, tmp);
+				gid = gr->gr_gid;
+			}
+		}
+		break;
+
+		case '1':   /* --stdout /path/to/stdout.lgfile */
+			redirect_stdout = optarg;
+			break;
+
+		case '2':  /* --stderr /path/to/stderr.logfile */
+			redirect_stderr = optarg;
+			break;
+		case '3':  /* --reexec */
+			reexec = true;
+			break;
+
+		case_RC_COMMON_GETOPT
+		}
+
+	verbose = rc_yesno(getenv ("EINFO_VERBOSE"));
+	endpwent();
+	argc -= optind;
+	argv += optind;
+	exec = *argv;
+
+	/* Expand ~ */
+	if (ch_dir && *ch_dir == '~')
+		ch_dir = expand_home(home, ch_dir);
+	if (ch_root && *ch_root == '~')
+		ch_root = expand_home(home, ch_root);
+
+	umask(numask);
+	if (!pidfile)
+		xasprintf(&pidfile, "/var/run/supervise-%s.pid", svcname);
+	xasprintf(&fifopath, "%s/supervise-%s.ctl", RC_SVCDIR, svcname);
+	if (mkfifo(fifopath, 0600) == -1 && errno != EEXIST)
+		eerrorx("%s: unable to create control fifo: %s",
+				applet, strerror(errno));
+
+	if (reexec) {
+		str = rc_service_value_get(svcname, "argc");
+		sscanf(str, "%d", &child_argc);
+		child_argv = xmalloc((child_argc + 1) * sizeof(char *));
+		memset(child_argv, 0, (child_argc + 1) * sizeof(char *));
+		for (x = 0; x < child_argc; x++) {
+			xasprintf(&varbuf, "argv_%d", x);
+			str = rc_service_value_get(svcname, varbuf);
+			child_argv[x] = str;
+			free(varbuf);
+			varbuf = NULL;
+		}
+		free(str);
+		str = rc_service_value_get(svcname, "child_pid");
+		sscanf(str, "%d", &child_pid);
+		free(str);
+		exec = rc_service_value_get(svcname, "exec");
+		pidfile = rc_service_value_get(svcname, "pidfile");
+		retry = rc_service_value_get(svcname, "retry");
+		if (retry) {
+			parse_schedule(applet, retry, sig);
+			rc_service_value_set(svcname, "retry", retry);
+		} else
+			parse_schedule(applet, NULL, sig);
+
+		str = rc_service_value_get(svcname, "respawn_delay");
+		sscanf(str, "%d", &respawn_delay);
+		str = rc_service_value_get(svcname, "respawn_max");
+		sscanf(str, "%d", &respawn_max);
+		supervisor(exec, child_argv);
+	} else if (start) {
+		if (exec) {
+			if (*exec == '~')
+				exec = expand_home(home, exec);
+
+			/* Validate that the binary exists if we are starting */
+			if (*exec == '/' || *exec == '.') {
+				/* Full or relative path */
+				if (ch_root)
+					xasprintf(&exec_file, "%s/%s", ch_root, exec);
+				else
+					xasprintf(&exec_file, "%s", exec);
+			} else {
+				/* Something in $PATH */
+				p = tmp = xstrdup(getenv("PATH"));
+				exec_file = NULL;
+				while ((token = strsep(&p, ":"))) {
+					if (ch_root)
+						xasprintf(&exec_file, "%s/%s/%s", ch_root, token, exec);
+					else
+						xasprintf(&exec_file, "%s/%s", token, exec);
+					if (exec_file && exists(exec_file))
+						break;
+					free(exec_file);
+					exec_file = NULL;
+				}
+				free(tmp);
+			}
+			if (!exists(exec_file)) {
+				eerror("%s: %s does not exist", applet,
+				    exec_file ? exec_file : exec);
+				free(exec_file);
+				exit(EXIT_FAILURE);
+			}
+		} else
+			eerrorx("%s: nothing to start", applet);
+
+		pid = get_pid(applet, pidfile);
+		if (pid != -1)
+			if (do_stop(applet, exec, (const char * const *)argv, pid, uid,
+						0, false, true) > 0)
+				eerrorx("%s: %s is already running", applet, exec);
+
+		if (respawn_period > 0 && respawn_delay * respawn_max > respawn_period)
+			ewarn("%s: Please increase the value of --respawn-period to more "
+				"than %d to avoid infinite respawning", applet,
+				respawn_delay * respawn_max);
+
+		if (retry) {
+			parse_schedule(applet, retry, sig);
+			rc_service_value_set(svcname, "retry", retry);
+		} else
+			parse_schedule(applet, NULL, sig);
+
+		einfov("Detaching to start `%s'", exec);
+		syslog(LOG_INFO, "Supervisor command line: %s", cmdline);
+		free(cmdline);
+		cmdline = NULL;
+
+		/* Remove existing pidfile */
+		if (pidfile)
+			unlink(pidfile);
+
+		/* Make sure we can write a pid file */
+		fp = fopen(pidfile, "w");
+		if (!fp)
+			eerrorx("%s: fopen `%s': %s", applet, pidfile, strerror(errno));
+		fclose(fp);
+
+		rc_service_value_set(svcname, "pidfile", pidfile);
+		varbuf = NULL;
+		xasprintf(&varbuf, "%i", respawn_delay);
+		rc_service_value_set(svcname, "respawn_delay", varbuf);
+		free(varbuf);
+		xasprintf(&varbuf, "%i", respawn_max);
+		rc_service_value_set(svcname, "respawn_max", varbuf);
+		free(varbuf);
+		xasprintf(&varbuf, "%i", respawn_period);
+		rc_service_value_set(svcname, "respawn_period", varbuf);
+		free(varbuf);
+		child_pid = fork();
+		if (child_pid == -1)
+			eerrorx("%s: fork: %s", applet, strerror(errno));
+		if (child_pid != 0)
+			/* first parent process, do nothing. */
+			exit(EXIT_SUCCESS);
+#ifdef TIOCNOTTY
+		tty_fd = open("/dev/tty", O_RDWR);
+#endif
+		devnull_fd = open("/dev/null", O_RDWR);
+		dup2(devnull_fd, STDIN_FILENO);
+		dup2(devnull_fd, STDOUT_FILENO);
+		dup2(devnull_fd, STDERR_FILENO);
+		child_pid = fork();
+		if (child_pid == -1)
+			eerrorx("%s: fork: %s", applet, strerror(errno));
+		else if (child_pid != 0) {
+			c = argv;
+			x = 0;
+			while (c && *c) {
+				varbuf = NULL;
+				xasprintf(&varbuf, "argv_%-d",x);
+				rc_service_value_set(svcname, varbuf, *c);
+				free(varbuf);
+				varbuf = NULL;
+				x++;
+				c++;
+			}
+			xasprintf(&varbuf, "%d", x);
+			rc_service_value_set(svcname, "argc", varbuf);
+			free(varbuf);
+			rc_service_value_set(svcname, "exec", exec);
+			supervisor(exec, argv);
+		} else
+			child_process(exec, argv);
+	} else if (stop) {
+		pid = get_pid(applet, pidfile);
+		if (pid != -1) {
+			i = kill(pid, SIGTERM);
+			if (i != 0)
+				/* We failed to send the signal */
+				ewarn("Unable to shut down the supervisor");
+			else {
+				/* wait for the supervisor to go down */
+				while (kill(pid, 0) == 0) {
+					ts.tv_sec = 0;
+					ts.tv_nsec = 1;
+					nanosleep(&ts, NULL);
+				}
+			}
+		}
+
+		/* Even if we have not actually killed anything, we should
+		 * remove information about it as it may have unexpectedly
+		 * crashed out. We should also return success as the end
+		 * result would be the same. */
+		if (pidfile && exists(pidfile))
+			unlink(pidfile);
+		if (svcname) {
+			rc_service_daemon_set(svcname, exec,
+			    (const char *const *)argv,
+			    pidfile, false);
+			rc_service_mark(svcname, RC_SERVICE_STOPPED);
+		}
+		exit(EXIT_SUCCESS);
+	} else if (sendsig) {
+		fifo_fd = open(fifopath, O_WRONLY |O_NONBLOCK);
+		if (fifo_fd < 0)
+			eerrorx("%s: unable to open control fifo %s", applet, strerror(errno));
+		xasprintf(&str, "sig %d", sig);
+		x = write(fifo_fd, str, strlen(str));
+		if (x == -1) {
+			free(tmp);
+			eerrorx("%s: error writing to control fifo: %s", applet,
+					strerror(errno));
+		}
+		free(tmp);
+		exit(EXIT_SUCCESS);
+	}
+}