1 /* beanstalk - fast, general-purpose work queue */
3 /* Copyright (C) 2007 Keith Rarick and Philotic Inc.
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
24 #include <sys/resource.h>
25 #include <sys/socket.h>
26 #include <netinet/in.h>
27 #include <arpa/inet.h>
28 #include <sys/types.h>
36 static char *user
= NULL
;
37 static int detach
= 0;
38 static int port
= 11300;
39 static struct in_addr host_addr
= { INADDR_ANY
};
42 nullfd(int fd
, int flags
)
47 r
= open("/dev/null", flags
);
48 if (r
!= fd
) twarn("open(\"/dev/null\")"), exit(1);
75 su(const char *user
) {
80 pwent
= getpwnam(user
);
81 if (errno
) twarn("getpwnam(\"%s\")", user
), exit(32);
82 if (!pwent
) twarnx("getpwnam(\"%s\"): no such user", user
), exit(33);
84 r
= setgid(pwent
->pw_gid
);
85 if (r
== -1) twarn("setgid(%d \"%s\")", pwent
->pw_gid
, user
), exit(34);
87 r
= setuid(pwent
->pw_uid
);
88 if (r
== -1) twarn("setuid(%d \"%s\")", pwent
->pw_uid
, user
), exit(34);
104 sa
.sa_handler
= SIG_IGN
;
106 r
= sigemptyset(&sa
.sa_mask
);
107 if (r
== -1) twarn("sigemptyset()"), exit(111);
109 r
= sigaction(SIGPIPE
, &sa
, 0);
110 if (r
== -1) twarn("sigaction(SIGPIPE)"), exit(111);
112 sa
.sa_handler
= enter_drain_mode
;
113 r
= sigaction(SIGUSR1
, &sa
, 0);
114 if (r
== -1) twarn("sigaction(SIGUSR1)"), exit(111);
116 sa
.sa_handler
= exit_cleanly
;
117 r
= sigaction(SIGINT
, &sa
, 0);
118 if (r
== -1) twarn("sigaction(SIGINT)"), exit(111);
121 /* This is a workaround for a mystifying workaround in libevent's epoll
122 * implementation. The epoll_init() function creates an epoll fd with space to
123 * handle RLIMIT_NOFILE - 1 fds, accompanied by the following puzzling comment:
124 * "Solaris is somewhat retarded - it's important to drop backwards
125 * compatibility when making changes. So, don't dare to put rl.rlim_cur here."
126 * This is presumably to work around a bug in Solaris, but it has the
127 * unfortunate side-effect of causing epoll_ctl() (and, therefore, event_add())
128 * to fail for a valid fd if we have hit the limit of open fds. That makes it
129 * hard to provide reasonable behavior in that situation. So, let's reduce the
130 * real value of RLIMIT_NOFILE by one, after epoll_init() has run. */
137 r
= getrlimit(RLIMIT_NOFILE
, &rl
);
138 if (r
!= 0) twarn("getrlimit(RLIMIT_NOFILE)"), exit(2);
142 r
= setrlimit(RLIMIT_NOFILE
, &rl
);
143 if (r
!= 0) twarn("setrlimit(RLIMIT_NOFILE)"), exit(2);
147 usage(char *msg
, char *arg
)
149 if (arg
) warnx("%s: %s", msg
, arg
);
150 fprintf(stderr
, "Use: %s [OPTIONS]\n"
154 " -l ADDR listen on address (default is 0.0.0.0)\n"
155 " -p PORT listen on port (default is 11300)\n"
156 " -u USER become user and group\n"
157 " -z SIZE set the maximum job size\n"
158 " -h show this help\n",
164 parse_size_t(char *str
)
169 r
= sscanf(str
, "%zu%c", &size
, &x
);
170 if (1 != r
) usage("invalid size", str
);
175 parse_port(char *portstr
)
181 port
= strtol(portstr
, &end
, 10);
182 if (end
== portstr
) usage("invalid port", portstr
);
183 if (end
[0] != 0) usage("invalid port", portstr
);
184 if (errno
) usage("invalid port", portstr
);
189 static struct in_addr
190 parse_host(char *hoststr
)
195 r
= inet_aton(hoststr
, &addr
);
196 if (!r
) usage("invalid address", hoststr
);
202 opts(int argc
, char **argv
)
206 for (i
= 1; i
< argc
; ++i
) {
207 if (argv
[i
][0] != '-') usage("unknown option", argv
[i
]);
208 if (argv
[i
][1] == 0 || argv
[i
][2] != 0) usage("unknown option",argv
[i
]);
209 switch (argv
[i
][1]) {
214 port
= parse_port(argv
[++i
]);
217 host_addr
= parse_host(argv
[++i
]);
220 job_data_size_limit
= parse_size_t(argv
[++i
]);
228 usage("unknown option", argv
[i
]);
234 main(int argc
, char **argv
)
243 r
= make_server_socket(host_addr
, port
);
244 if (r
== -1) twarnx("make_server_socket()"), exit(111);
247 if (detach
) daemonize();
252 unbrake((evh
) h_accept
);
255 twarnx("got here for some reason");