/* return number of processed killed, -1 on error */
static int
do_stop(const char *exec, const char *const *argv,
pid_t pid, uid_t uid,int sig,
bool quiet, bool verbose, bool test)
{
RC_PIDLIST *pids;
RC_PID *pi;
RC_PID *np;
bool killed;
int nkilled = 0;
if (pid)
pids = rc_find_pids(NULL, NULL, 0, pid);
else
pids = rc_find_pids(exec, argv, uid, pid);
if (!pids)
return 0;
LIST_FOREACH_SAFE(pi, pids, entries, np) {
if (test) {
if (!quiet)
einfo("Would send signal %d to PID %d",
sig, pi->pid);
nkilled++;
} else {
if (verbose)
ebegin("Sending signal %d to PID %d",
sig, pi->pid);
errno = 0;
killed = (kill(pi->pid, sig) == 0 ||
errno == ESRCH ? true : false);
if (verbose)
eend(killed ? 0 : 1,
"%s: failed to send signal %d to PID %d: %s",
applet, sig, pi->pid, strerror(errno));
if (!killed) {
nkilled = -1;
} else {
if (nkilled != -1)
nkilled++;
}
}
free(pi);
}
free(pids);
return nkilled;
}
int main(int argc, char **argv)
{
int devnull_fd = -1;
#ifdef TIOCNOTTY
int tty_fd = -1;
#endif
#ifdef HAVE_PAM
pam_handle_t *pamh = NULL;
int pamr;
const char *const *pamenv = NULL;
#endif
int opt;
size_t size = 0;
bool start = false;
bool stop = false;
bool oknodo = false;
bool test = false;
char *exec = NULL;
char *startas = NULL;
char *name = NULL;
char *pidfile = NULL;
char *retry = NULL;
int sig = -1;
int nicelevel = 0, ionicec = -1, ioniced = 0;
bool background = false;
bool makepidfile = false;
bool interpreted = false;
bool progress = false;
uid_t uid = 0;
gid_t gid = 0;
char *home = NULL;
int tid = 0;
char *redirect_stderr = NULL;
char *redirect_stdout = NULL;
char *stderr_process = NULL;
char *stdout_process = NULL;
int stdin_fd;
int stdout_fd;
int stderr_fd;
pid_t pid, spid;
RC_PIDLIST *pids;
int i;
char *svcname = getenv("RC_SVCNAME");
RC_STRINGLIST *env_list;
RC_STRING *env;
char *tmp, *newpath, *np;
char *p;
char *token;
char *exec_file = NULL;
struct passwd *pw;
struct group *gr;
char *line = NULL;
FILE *fp;
size_t len;
mode_t numask = 022;
char **margv;
unsigned int start_wait = 0;
applet = basename_c(argv[0]);
atexit(cleanup);
signal_setup(SIGINT, handle_signal);
signal_setup(SIGQUIT, handle_signal);
signal_setup(SIGTERM, handle_signal);
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 */
}
/* 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;
}
}
}
while ((opt = getopt_long(argc, argv, getoptstring, longopts,
(int *) 0)) != -1)
switch (opt) {
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 'P': /* --progress */
progress = true;
break;
case 'R': /* --retry <schedule>|<timeout> */
retry = optarg;
break;
case 'S': /* --start */
start = true;
break;
case 'b': /* --background */
background = true;
break;
case 'c': /* --chuid <username>|<uid> */
/* DEPRECATED */
ewarn("WARNING: -c/--chuid is deprecated and will be removed in the future, please use -u/--user instead");
/* falls through */
case 'u': /* --user <username>|<uid> */
{
p = optarg;
tmp = strsep(&p, ":");
changeuser = xstrdup(tmp);
if (sscanf(tmp, "%d", &tid) != 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", &tid) != 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 '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 'i': /* --interpreted */
interpreted = true;
break;
case 'k':
if (parse_mode(&numask, optarg))
eerrorx("%s: invalid mode `%s'",
applet, optarg);
break;
case 'm': /* --make-pidfile */
makepidfile = true;
break;
case 'n': /* --name <process-name> */
name = optarg;
break;
case 'o': /* --oknodo */
/* DEPRECATED */
ewarn("WARNING: -o/--oknodo is deprecated and will be removed in the future");
oknodo = true;
break;
case 'p': /* --pidfile <pid-file> */
pidfile = optarg;
break;
case 's': /* --signal <signal> */
sig = parse_signal(applet, optarg);
break;
case 't': /* --test */
test = true;
break;
case 'r': /* --chroot /new/root */
ch_root = optarg;
break;
case 'a': /* --startas <name> */
/* DEPRECATED */
ewarn("WARNING: -a/--startas is deprecated and will be removed in the future, please use -x/--exec or -n/--name instead");
startas = optarg;
break;
case 'w':
if (sscanf(optarg, "%d", &start_wait) != 1)
eerrorx("%s: `%s' not a number",
applet, optarg);
break;
case 'x': /* --exec <executable> */
exec = optarg;
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': /* --stdout-logger "command to run for stdout logging" */
stdout_process = optarg;
break;
case '4': /* --stderr-logger "command to run for stderr logging" */
stderr_process = optarg;
break;
case_RC_COMMON_GETOPT
}
endpwent();
argc -= optind;
argv += optind;
/* Allow start-stop-daemon --signal HUP --exec /usr/sbin/dnsmasq
* instead of forcing --stop --oknodo as well */
if (!start &&
!stop &&
sig != SIGINT &&
sig != SIGTERM &&
sig != SIGQUIT &&
sig != SIGKILL)
oknodo = true;
if (!exec)
exec = startas;
else if (!name)
name = startas;
if (!exec) {
exec = *argv;
if (!exec)
exec = name;
if (name && start)
*argv = name;
} else if (name) {
*--argv = name;
++argc;
} else if (exec) {
*--argv = exec;
++argc;
};
if (stop || sig != -1) {
if (sig == -1)
sig = SIGTERM;
if (!*argv && !pidfile && !name && !uid)
eerrorx("%s: --stop needs --exec, --pidfile,"
" --name or --user", applet);
if (background)
eerrorx("%s: --background is only relevant with"
" --start", applet);
if (makepidfile)
eerrorx("%s: --make-pidfile is only relevant with"
" --start", applet);
if (redirect_stdout || redirect_stderr)
eerrorx("%s: --stdout and --stderr are only relevant"
" with --start", applet);
if (stdout_process || stderr_process)
eerrorx("%s: --stdout-logger and --stderr-logger are only relevant"
" with --start", applet);
if (start_wait)
ewarn("using --wait with --stop has no effect,"
" use --retry instead");
} else {
if (!exec)
eerrorx("%s: nothing to start", applet);
if (makepidfile && !pidfile)
eerrorx("%s: --make-pidfile is only relevant with"
" --pidfile", applet);
if ((redirect_stdout || redirect_stderr) && !background)
eerrorx("%s: --stdout and --stderr are only relevant"
" with --background", applet);
if ((stdout_process || stderr_process) && !background)
eerrorx("%s: --stdout-logger and --stderr-logger are only relevant"
" with --background", applet);
if (redirect_stdout && stdout_process)
eerrorx("%s: do not use --stdout and --stdout-logger together",
applet);
if (redirect_stderr && stderr_process)
eerrorx("%s: do not use --stderr and --stderr-logger together",
applet);
}
/* 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);
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 (start && !exists(exec_file)) {
eerror("%s: %s does not exist", applet,
*exec_file ? exec_file : exec);
free(exec_file);
exit(EXIT_FAILURE);
}
if (start && retry)
ewarn("using --retry with --start has no effect,"
" use --wait instead");
/* If we don't have a pidfile we should check if it's interpreted
* or not. If it we, we need to pass the interpreter through
* to our daemon calls to find it correctly. */
if (interpreted && !pidfile) {
fp = fopen(exec_file, "r");
if (fp) {
line = NULL;
if (getline(&line, &size, fp) == -1)
eerrorx("%s: %s", applet, strerror(errno));
p = line;
fclose(fp);
if (p != NULL && line[0] == '#' && line[1] == '!') {
p = line + 2;
/* Strip leading spaces */
while (*p == ' ' || *p == '\t')
p++;
/* Remove the trailing newline */
len = strlen(p) - 1;
if (p[len] == '\n')
p[len] = '\0';
token = strsep(&p, " ");
free(exec_file);
xasprintf(&exec_file, "%s", token);
opt = 0;
for (nav = argv; *nav; nav++)
opt++;
nav = xmalloc(sizeof(char *) * (opt + 3));
nav[0] = exec_file;
len = 1;
if (p)
nav[len++] = p;
for (i = 0; i < opt; i++)
nav[i + len] = argv[i];
nav[i + len] = '\0';
}
}
}
margv = nav ? nav : argv;
if (stop || sig != -1) {
if (sig == -1)
sig = SIGTERM;
if (!stop)
oknodo = true;
if (retry)
parse_schedule(applet, retry, sig);
else if (test || oknodo)
parse_schedule(applet, "0", sig);
else
parse_schedule(applet, NULL, sig);
if (pidfile) {
pid = get_pid(applet, pidfile);
if (pid == -1 && errno != ENOENT)
exit(EXIT_FAILURE);
} else {
pid = 0;
}
i = run_stop_schedule(applet, exec, (const char *const *)margv,
pid, uid, test, progress, false);
if (i < 0)
/* We failed to stop something */
exit(EXIT_FAILURE);
if (test || oknodo)
return i > 0 ? EXIT_SUCCESS : EXIT_FAILURE;
/* 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);
exit(EXIT_SUCCESS);
}
if (pidfile)
pid = get_pid(applet, pidfile);
else
pid = 0;
if (pid)
pids = rc_find_pids(NULL, NULL, 0, pid);
else
pids = rc_find_pids(exec, (const char * const *) argv, uid, 0);
if (pids)
eerrorx("%s: %s is already running", applet, exec);
free(pids);
if (test) {
if (rc_yesno(getenv("EINFO_QUIET")))
exit (EXIT_SUCCESS);
einfon("Would start");
while (argc-- > 0)
printf(" %s", *argv++);
printf("\n");
eindent();
if (uid != 0)
einfo("as user id %d", uid);
if (gid != 0)
einfo("as group id %d", gid);
if (ch_root)
einfo("in root `%s'", ch_root);
if (ch_dir)
einfo("in dir `%s'", ch_dir);
if (nicelevel != 0)
einfo("with a priority of %d", nicelevel);
if (name)
einfo ("with a process name of %s", name);
eoutdent();
exit(EXIT_SUCCESS);
}
ebeginv("Detaching to start `%s'", exec);
eindentv();
/* Remove existing pidfile */
if (pidfile)
unlink(pidfile);
if (background)
signal_setup(SIGCHLD, handle_signal);
if ((pid = fork()) == -1)
eerrorx("%s: fork: %s", applet, strerror(errno));
/* Child process - lets go! */
if (pid == 0) {
pid_t mypid = getpid();
umask(numask);
#ifdef TIOCNOTTY
tty_fd = open("/dev/tty", O_RDWR);
#endif
devnull_fd = open("/dev/null", O_RDWR);
if (nicelevel) {
if (setpriority(PRIO_PROCESS, mypid, nicelevel) == -1)
eerrorx("%s: setpritory %d: %s",
applet, nicelevel,
strerror(errno));
}
if (ionicec != -1 &&
ioprio_set(1, mypid, ionicec | ioniced) == -1)
eerrorx("%s: ioprio_set %d %d: %s", applet,
ionicec, ioniced, strerror(errno));
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));
if (makepidfile && pidfile) {
fp = fopen(pidfile, "w");
if (! fp)
eerrorx("%s: fopen `%s': %s", applet, pidfile,
strerror(errno));
fprintf(fp, "%d\n", mypid);
fclose(fp);
}
#ifdef HAVE_PAM
if (changeuser != NULL) {
pamr = pam_start("start-stop-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);
if (uid && setuid(uid))
eerrorx ("%s: unable to set userid to %d",
applet, uid);
/* Close any fd's to the passwd database */
endpwent();
#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=", 10) != 0 &&
strncmp(env->value, "RC_SVCNAME=", 10) != 0) ||
strncmp(env->value, "SSD_NICELEVEL=", 14) == 0 ||
strncmp(env->value, "SSD_IONICELEVEL=", 16) == 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 | S_IRGRP | S_IWGRP)) == -1)
eerrorx("%s: unable to open the logfile"
" for stdout `%s': %s",
applet, redirect_stdout, strerror(errno));
}else if (stdout_process) {
stdout_fd = rc_pipe_command(stdout_process);
if (stdout_fd == -1)
eerrorx("%s: unable to open the logging process"
" for stdout `%s': %s",
applet, stdout_process, strerror(errno));
}
if (redirect_stderr) {
if ((stderr_fd = open(redirect_stderr,
O_WRONLY | O_CREAT | O_APPEND,
S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP)) == -1)
eerrorx("%s: unable to open the logfile"
" for stderr `%s': %s",
applet, redirect_stderr, strerror(errno));
}else if (stderr_process) {
stderr_fd = rc_pipe_command(stderr_process);
if (stderr_fd == -1)
eerrorx("%s: unable to open the logging process"
" for stderr `%s': %s",
applet, stderr_process, strerror(errno));
}
if (background)
dup2(stdin_fd, STDIN_FILENO);
if (background || redirect_stdout || stdout_process
|| rc_yesno(getenv("EINFO_QUIET")))
dup2(stdout_fd, STDOUT_FILENO);
if (background || redirect_stderr || stderr_process
|| rc_yesno(getenv("EINFO_QUIET")))
dup2(stderr_fd, STDERR_FILENO);
for (i = getdtablesize() - 1; i >= 3; --i)
close(i);
setsid();
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));
}
bool
rc_service_daemons_crashed(const char *service)
{
char dirpath[PATH_MAX];
DIR *dp;
struct dirent *d;
char *path = dirpath;
FILE *fp;
char *line = NULL;
size_t len = 0;
char **argv = NULL;
char *exec = NULL;
char *name = NULL;
char *pidfile = NULL;
pid_t pid = 0;
RC_PIDLIST *pids;
RC_PID *p1;
RC_PID *p2;
char *p;
char *token;
bool retval = false;
RC_STRINGLIST *list = NULL;
RC_STRING *s;
size_t i;
char *ch_root;
char *spidfile;
path += snprintf(dirpath, sizeof(dirpath), RC_SVCDIR "/daemons/%s",
basename_c(service));
if (!(dp = opendir(dirpath)))
return false;
while ((d = readdir(dp))) {
if (d->d_name[0] == '.')
continue;
snprintf(path, sizeof(dirpath) - (path - dirpath), "/%s",
d->d_name);
fp = fopen(dirpath, "r");
if (!fp)
break;
while ((rc_getline(&line, &len, fp))) {
p = line;
if ((token = strsep(&p, "=")) == NULL || !p)
continue;
if (!*p)
continue;
if (strcmp(token, "exec") == 0) {
if (exec)
free(exec);
exec = xstrdup(p);
} else if (strncmp(token, "argv_", 5) == 0) {
if (!list)
list = rc_stringlist_new();
rc_stringlist_add(list, p);
} else if (strcmp(token, "name") == 0) {
if (name)
free(name);
name = xstrdup(p);
} else if (strcmp(token, "pidfile") == 0) {
pidfile = xstrdup(p);
break;
}
}
fclose(fp);
ch_root = rc_service_value_get(basename_c(service), "chroot");
spidfile = pidfile;
if (ch_root && pidfile) {
spidfile = xmalloc(strlen(ch_root) + strlen(pidfile) + 1);
strcpy(spidfile, ch_root);
strcat(spidfile, pidfile);
free(pidfile);
pidfile = spidfile;
}
pid = 0;
if (pidfile) {
retval = true;
if ((fp = fopen(pidfile, "r"))) {
if (fscanf(fp, "%d", &pid) == 1)
retval = false;
fclose(fp);
}
free(pidfile);
pidfile = NULL;
/* We have the pid, so no need to match
on exec or name */
free(exec);
exec = NULL;
free(name);
name = NULL;
} else {
if (exec) {
if (!list)
list = rc_stringlist_new();
if (!TAILQ_FIRST(list))
rc_stringlist_add(list, exec);
free(exec);
exec = NULL;
}
if (list) {
/* We need to flatten our linked list
into an array */
i = 0;
TAILQ_FOREACH(s, list, entries)
i++;
argv = xmalloc(sizeof(char *) * (i + 1));
i = 0;
TAILQ_FOREACH(s, list, entries)
argv[i++] = s->value;
argv[i] = '\0';
}
}
if (!retval) {
if (pid != 0) {
if (kill(pid, 0) == -1 && errno == ESRCH)
retval = true;
} else if ((pids = rc_find_pids(exec,
(const char *const *)argv,
0, pid)))
{
p1 = LIST_FIRST(pids);
while (p1) {
p2 = LIST_NEXT(p1, entries);
free(p1);
p1 = p2;
}
free(pids);
} else
retval = true;
}
rc_stringlist_free(list);
list = NULL;
free(argv);
argv = NULL;
free(exec);
exec = NULL;
free(name);
name = NULL;
if (retval)
break;
}
closedir(dp);
free(line);
return retval;
}
