**/
#include "collectd.h"
-#include "common.h"
+#include "common.h"
#include "plugin.h"
#include "configfile.h"
#include <sys/types.h>
-#include <sys/socket.h>
#include <sys/un.h>
#include <netdb.h>
-#include <pthread.h>
-
#if HAVE_LOCALE_H
# include <locale.h>
#endif
*/
char hostname_g[DATA_MAX_NAME_LEN];
cdtime_t interval_g;
-int pidfile_from_cli = 0;
int timeout_g;
#if HAVE_LIBKSTAT
kstat_ctl_t *kc;
{
const char *str;
- struct addrinfo ai_hints;
struct addrinfo *ai_list;
- struct addrinfo *ai_ptr;
int status;
str = global_option_get ("Hostname");
if (IS_FALSE (str))
return (0);
- memset (&ai_hints, '\0', sizeof (ai_hints));
- ai_hints.ai_flags = AI_CANONNAME;
+ struct addrinfo ai_hints = {
+ .ai_flags = AI_CANONNAME
+ };
status = getaddrinfo (hostname_g, NULL, &ai_hints, &ai_list);
if (status != 0)
return (-1);
}
- for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
+ for (struct addrinfo *ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
{
if (ai_ptr->ai_canonname == NULL)
continue;
while ((dirlen > 0) && (dir[dirlen - 1] == '/'))
dir[--dirlen] = '\0';
- if (dirlen <= 0) {
+ if (dirlen == 0) {
free (dir);
return (-1);
}
/* TODO
* Remove all settings but `-f' and `-C'
*/
+__attribute__((noreturn))
static void exit_usage (int status)
{
printf ("Usage: "PACKAGE_NAME" [OPTIONS]\n\n"
}
#endif
- plugin_init_all ();
-
- return (0);
+ return plugin_init_all ();
} /* int do_init () */
static int do_shutdown (void)
{
- plugin_shutdown_all ();
- return (0);
+ return plugin_shutdown_all ();
} /* int do_shutdown */
#if COLLECT_DAEMON
#ifdef KERNEL_LINUX
static int notify_upstart (void)
{
- const char *upstart_job = getenv("UPSTART_JOB");
+ char const *upstart_job = getenv("UPSTART_JOB");
if (upstart_job == NULL)
return 0;
if (strcmp(upstart_job, "collectd") != 0)
+ {
+ WARNING ("Environment specifies unexpected UPSTART_JOB=\"%s\", expected \"collectd\". Ignoring the variable.", upstart_job);
return 0;
+ }
- WARNING ("supervised by upstart, will stop to signal readyness");
+ NOTICE("Upstart detected, stopping now to signal readyness.");
raise(SIGSTOP);
unsetenv("UPSTART_JOB");
static int notify_systemd (void)
{
- int fd = -1;
- const char *notifysocket = getenv("NOTIFY_SOCKET");
- struct sockaddr_un su;
- struct iovec iov;
- struct msghdr hdr;
+ int fd;
+ const char *notifysocket;
+ struct sockaddr_un su = { 0 };
+ size_t su_size;
+ char buffer[] = "READY=1\n";
+ notifysocket = getenv ("NOTIFY_SOCKET");
if (notifysocket == NULL)
return 0;
- if ((strchr("@/", notifysocket[0])) == NULL ||
- strlen(notifysocket) < 2)
+ if ((strlen (notifysocket) < 2)
+ || ((notifysocket[0] != '@') && (notifysocket[0] != '/')))
+ {
+ ERROR ("invalid notification socket NOTIFY_SOCKET=\"%s\": path must be absolute", notifysocket);
return 0;
+ }
+ NOTICE ("Systemd detected, trying to signal readyness.");
- WARNING ("supervised by systemd, will signal readyness");
- if ((fd = socket(AF_UNIX, SOCK_DGRAM, 0)) < 0) {
- WARNING ("cannot contact systemd socket %s", notifysocket);
+ unsetenv ("NOTIFY_SOCKET");
+
+#if defined(SOCK_CLOEXEC)
+ fd = socket (AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, /* protocol = */ 0);
+#else
+ fd = socket (AF_UNIX, SOCK_DGRAM, /* protocol = */ 0);
+#endif
+ if (fd < 0) {
+ char errbuf[1024];
+ ERROR ("creating UNIX socket failed: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
return 0;
}
- bzero(&su, sizeof(su));
su.sun_family = AF_UNIX;
- sstrncpy (su.sun_path, notifysocket, sizeof(su.sun_path));
-
- if (notifysocket[0] == '@')
+ if (notifysocket[0] != '@')
+ {
+ /* regular UNIX socket */
+ sstrncpy (su.sun_path, notifysocket, sizeof (su.sun_path));
+ su_size = sizeof (su);
+ }
+ else
+ {
+ /* Linux abstract namespace socket: specify address as "\0foo", i.e.
+ * start with a null byte. Since null bytes have no special meaning in
+ * that case, we have to set su_size correctly to cover only the bytes
+ * that are part of the address. */
+ sstrncpy (su.sun_path, notifysocket, sizeof (su.sun_path));
su.sun_path[0] = 0;
+ su_size = sizeof (sa_family_t) + strlen (notifysocket);
+ if (su_size > sizeof (su))
+ su_size = sizeof (su);
+ }
- bzero(&iov, sizeof(iov));
- iov.iov_base = "READY=1";
- iov.iov_len = strlen("READY=1");
-
- bzero(&hdr, sizeof(hdr));
- hdr.msg_name = &su;
- hdr.msg_namelen = offsetof(struct sockaddr_un, sun_path) +
- strlen(notifysocket);
- hdr.msg_iov = &iov;
- hdr.msg_iovlen = 1;
-
- unsetenv("NOTIFY_SOCKET");
- if (sendmsg(fd, &hdr, MSG_NOSIGNAL) < 0) {
- WARNING ("cannot send notification to systemd");
+ if (sendto (fd, buffer, strlen (buffer), MSG_NOSIGNAL, (void *) &su, (socklen_t) su_size) < 0)
+ {
+ char errbuf[1024];
+ ERROR ("sendto(\"%s\") failed: %s", notifysocket,
+ sstrerror (errno, errbuf, sizeof (errbuf)));
close(fd);
return 0;
}
+
+ unsetenv ("NOTIFY_SOCKET");
close(fd);
return 1;
}
int main (int argc, char **argv)
{
- struct sigaction sig_int_action;
- struct sigaction sig_term_action;
- struct sigaction sig_usr1_action;
- struct sigaction sig_pipe_action;
- char *configfile = CONFIGFILE;
+ const char *configfile = CONFIGFILE;
int test_config = 0;
int test_readall = 0;
const char *basedir;
#if COLLECT_DAEMON
- struct sigaction sig_chld_action;
pid_t pid;
int daemonize = 1;
#endif
break;
case 'T':
test_readall = 1;
- global_option_set ("ReadThreads", "-1");
+ global_option_set ("ReadThreads", "-1", 1);
#if COLLECT_DAEMON
daemonize = 0;
#endif /* COLLECT_DAEMON */
break;
#if COLLECT_DAEMON
case 'P':
- global_option_set ("PIDFile", optarg);
- pidfile_from_cli = 1;
+ global_option_set ("PIDFile", optarg, 1);
break;
case 'f':
daemonize = 0;
/*
* fork off child
*/
- memset (&sig_chld_action, '\0', sizeof (sig_chld_action));
- sig_chld_action.sa_handler = SIG_IGN;
+ struct sigaction sig_chld_action = {
+ .sa_handler = SIG_IGN
+ };
+
sigaction (SIGCHLD, &sig_chld_action, NULL);
/*
#endif
)
{
+ int status;
+
if ((pid = fork ()) == -1)
{
/* error */
close (1);
close (0);
- if (open ("/dev/null", O_RDWR) != 0)
+ status = open ("/dev/null", O_RDWR);
+ if (status != 0)
{
- ERROR ("Error: Could not connect `STDIN' to `/dev/null'");
+ ERROR ("Error: Could not connect `STDIN' to `/dev/null' (status %d)", status);
return (1);
}
- if (dup (0) != 1)
+
+ status = dup (0);
+ if (status != 1)
{
- ERROR ("Error: Could not connect `STDOUT' to `/dev/null'");
+ ERROR ("Error: Could not connect `STDOUT' to `/dev/null' (status %d)", status);
return (1);
}
- if (dup (0) != 2)
+
+ status = dup (0);
+ if (status != 2)
{
- ERROR ("Error: Could not connect `STDERR' to `/dev/null'");
+ ERROR ("Error: Could not connect `STDERR' to `/dev/null', (status %d)", status);
return (1);
}
} /* if (daemonize) */
#endif /* COLLECT_DAEMON */
- memset (&sig_pipe_action, '\0', sizeof (sig_pipe_action));
- sig_pipe_action.sa_handler = SIG_IGN;
+ struct sigaction sig_pipe_action = {
+ .sa_handler = SIG_IGN
+ };
+
sigaction (SIGPIPE, &sig_pipe_action, NULL);
/*
* install signal handlers
*/
- memset (&sig_int_action, '\0', sizeof (sig_int_action));
- sig_int_action.sa_handler = sig_int_handler;
+ struct sigaction sig_int_action = {
+ .sa_handler = sig_int_handler
+ };
+
if (0 != sigaction (SIGINT, &sig_int_action, NULL)) {
char errbuf[1024];
ERROR ("Error: Failed to install a signal handler for signal INT: %s",
return (1);
}
- memset (&sig_term_action, '\0', sizeof (sig_term_action));
- sig_term_action.sa_handler = sig_term_handler;
+ struct sigaction sig_term_action = {
+ .sa_handler = sig_term_handler
+ };
+
if (0 != sigaction (SIGTERM, &sig_term_action, NULL)) {
char errbuf[1024];
ERROR ("Error: Failed to install a signal handler for signal TERM: %s",
return (1);
}
- memset (&sig_usr1_action, '\0', sizeof (sig_usr1_action));
- sig_usr1_action.sa_handler = sig_usr1_handler;
+ struct sigaction sig_usr1_action = {
+ .sa_handler = sig_usr1_handler
+ };
+
if (0 != sigaction (SIGUSR1, &sig_usr1_action, NULL)) {
char errbuf[1024];
ERROR ("Error: Failed to install a signal handler for signal USR1: %s",
/*
* run the actual loops
*/
- do_init ();
+ if (do_init () != 0)
+ {
+ ERROR ("Error: one or more plugin init callbacks failed.");
+ exit_status = 1;
+ }
if (test_readall)
{
if (plugin_read_all_once () != 0)
+ {
+ ERROR ("Error: one or more plugin read callbacks failed.");
exit_status = 1;
+ }
}
else
{
/* close syslog */
INFO ("Exiting normally.");
- do_shutdown ();
+ if (do_shutdown () != 0)
+ {
+ ERROR ("Error: one or more plugin shutdown callbacks failed.");
+ exit_status = 1;
+ }
#if COLLECT_DAEMON
if (daemonize)
projects / collectd.git / blobdiff