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Implement --pidfile and move clean shutdown into main()

This commit is contained in:
Emil Mikulic 2006-07-21 07:14:22 +00:00
parent 42833fb312
commit 4fed6d0665
1 changed files with 98 additions and 46 deletions
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144
trunk/darkhttpd.c
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@ -49,6 +49,7 @@ static const int debug = 1;
#include <errno.h>
#include <fcntl.h>
#include <grp.h>
#include <libutil.h>
#include <pwd.h>
#include <signal.h>
#include <stdarg.h>
@ -247,10 +248,14 @@ static int sockin = -1; /* socket to accept connections from */
static char *wwwroot = NULL; /* a path name */
static char *logfile_name = NULL; /* NULL = no logging */
static FILE *logfile = NULL;
static char *pidfile_name = NULL; /* NULL = no pidfile */
static struct pidfh *pidfile = NULL;
static int want_chroot = 0, want_accf = 0;
static uint32_t num_requests = 0;
static uint64_t total_in = 0, total_out = 0;
static int running = 1; /* signal handler sets this to false */
#define INVALID_UID ((uid_t) -1)
#define INVALID_GID ((gid_t) -1)
@ -923,13 +928,17 @@ static void usage(void)
"\t\tParses specified file for extension-MIME associations.\n"
"\n");
printf(
"\t--uid uid, --gid gid\n"
"\t--uid uid/uname, --gid gid/gname (default: don't privdrop)\n"
"\t\tDrops privileges to given uid:gid after initialization.\n"
"\n");
printf(
"\t--pidfile filename (default: no pidfile)\n"
"\t\tWrite PID to the specified file.\n"
"\n");
#ifdef __FreeBSD__
printf(
"\t--accf\n"
"\t\tUse acceptfilter.\n"
"\t--accf (default: don't use acceptfilter)\n"
"\t\tUse acceptfilter. Needs the accf_http module loaded.\n"
"\n");
#endif
}
@ -1043,6 +1052,12 @@ static void parse_commandline(const int argc, char *argv[])
if (g == NULL) errx(1, "no such gid: `%s'", argv[i]);
drop_gid = g->gr_gid;
}
else if (strcmp(argv[i], "--pidfile") == 0)
{
if (++i >= argc)
errx(1, "missing filename after --pidfile");
pidfile_name = argv[i];
}
else if (strcmp(argv[i], "--accf") == 0)
{
want_accf = 1;
@ -2233,7 +2248,12 @@ static void httpd_poll(void)
else
return;
}
if (select_ret == -1) err(1, "select()");
if (select_ret == -1) {
if (errno == EINTR)
return; /* interrupted by signal */
else
err(1, "select() failed");
}
/* poll connections that select() says need attention */
if (FD_ISSET(sockin, &recv_set)) accept_connection();
@ -2262,44 +2282,11 @@ static void httpd_poll(void)
/* ---------------------------------------------------------------------------
* Close all sockets and FILEs and exit.
*/
static void exit_quickly(int sig)
static void
stop_running(int sig)
{
struct connection *conn, *next;
struct rusage r;
size_t i;
printf("\ncaught %s, cleaning up...", strsignal(sig)); fflush(stdout);
/* close and free connections */
LIST_FOREACH_SAFE(conn, &connlist, entries, next)
{
LIST_REMOVE(conn, entries);
free_connection(conn);
free(conn);
}
xclose(sockin);
if (logfile != NULL) fclose(logfile);
/* free mime_map */
for (i=0; i<mime_map_size; i++)
{
free(mime_map[i].extension);
free(mime_map[i].mimetype);
}
free(mime_map);
free(keep_alive_field);
free(wwwroot);
printf("done!\n");
getrusage(RUSAGE_SELF, &r);
printf("CPU time used: %u.%02u user, %u.%02u system\n",
(unsigned int)r.ru_utime.tv_sec,
(unsigned int)(r.ru_utime.tv_usec/10000),
(unsigned int)r.ru_stime.tv_sec,
(unsigned int)(r.ru_stime.tv_usec/10000)
);
printf("Requests: %u\n", num_requests);
printf("Bytes: %llu in, %llu out\n", total_in, total_out);
exit(EXIT_SUCCESS);
running = 0;
fprintf(stderr, "\ncaught %s, stopping\n", strsignal(sig));
}
@ -2319,20 +2306,35 @@ int main(int argc, char *argv[])
xasprintf(&keep_alive_field, "Keep-Alive: timeout=%d\r\n", idletime);
init_sockin();
/* create pidfile */
if (pidfile_name) {
pid_t otherpid;
pidfile = pidfile_open(pidfile_name, 0600, &otherpid);
if (pidfile == NULL) {
if (errno == EEXIST)
errx(1, "Daemon already running with PID %d", (int)otherpid);
else
err(1, "Can't create pidfile \"%s\"", pidfile_name);
}
}
/* open logfile */
if (logfile_name != NULL)
{
logfile = fopen(logfile_name, "ab");
if (logfile == NULL) err(1, "fopen(\"%s\")", logfile_name);
if (logfile == NULL)
err(1, "opening logfile: fopen(\"%s\")", logfile_name);
}
/* signals */
if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
err(1, "signal(ignore SIGPIPE)");
if (signal(SIGINT, exit_quickly) == SIG_ERR)
if (signal(SIGINT, stop_running) == SIG_ERR)
err(1, "signal(SIGINT)");
if (signal(SIGQUIT, exit_quickly) == SIG_ERR)
if (signal(SIGQUIT, stop_running) == SIG_ERR)
err(1, "signal(SIGQUIT)");
if (signal(SIGTERM, stop_running) == SIG_ERR)
err(1, "signal(SIGTERM)");
/* security */
if (want_chroot)
@ -2352,9 +2354,59 @@ int main(int argc, char *argv[])
printf("set uid to %d\n", drop_uid);
}
for (;;) httpd_poll();
/* FIXME: daemonize here */
return EXIT_FAILURE; /* unreachable */
if (pidfile) pidfile_write(pidfile);
/* main loop */
while (running) httpd_poll();
/* clean exit */
pidfile_remove(pidfile);
/* close and free connections */
{
struct connection *conn, *next;
LIST_FOREACH_SAFE(conn, &connlist, entries, next)
{
LIST_REMOVE(conn, entries);
free_connection(conn);
free(conn);
}
xclose(sockin);
if (logfile != NULL) fclose(logfile);
}
/* free the mallocs */
{
size_t i;
for (i=0; i<mime_map_size; i++)
{
free(mime_map[i].extension);
free(mime_map[i].mimetype);
}
free(mime_map);
free(keep_alive_field);
free(wwwroot);
}
/* usage stats */
{
struct rusage r;
getrusage(RUSAGE_SELF, &r);
printf("CPU time used: %u.%02u user, %u.%02u system\n",
(unsigned int)r.ru_utime.tv_sec,
(unsigned int)(r.ru_utime.tv_usec/10000),
(unsigned int)r.ru_stime.tv_sec,
(unsigned int)(r.ru_stime.tv_usec/10000)
);
printf("Requests: %u\n", num_requests);
printf("Bytes: %llu in, %llu out\n", total_in, total_out);
}
return (0);
}
/* vim:set tabstop=4 shiftwidth=4 expandtab tw=78: */