comparison: src/server/daemon/srvctrl.c
src/server/daemon/srvctrl.c
- changeset 179
- ef6827505bd2
- parent 178
- 4760f7f1b197
- child 254
- 4784c14aa639
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| 174:8f2a834d1d68 | 179:ef6827505bd2 |
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| 1 /* | |
| 2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. | |
| 3 * | |
| 4 * Copyright 2017 Olaf Wintermann. All rights reserved. | |
| 5 * | |
| 6 * Redistribution and use in source and binary forms, with or without | |
| 7 * modification, are permitted provided that the following conditions are met: | |
| 8 * | |
| 9 * 1. Redistributions of source code must retain the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer. | |
| 11 * | |
| 12 * 2. Redistributions in binary form must reproduce the above copyright | |
| 13 * notice, this list of conditions and the following disclaimer in the | |
| 14 * documentation and/or other materials provided with the distribution. | |
| 15 * | |
| 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
| 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE | |
| 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
| 26 * POSSIBILITY OF SUCH DAMAGE. | |
| 27 */ | |
| 28 | |
| 29 #include <stdio.h> | |
| 30 #include <stdlib.h> | |
| 31 #include <unistd.h> | |
| 32 #include <sys/socket.h> | |
| 33 #include <sys/un.h> | |
| 34 | |
| 35 #include "log.h" | |
| 36 #include "webserver.h" | |
| 37 | |
| 38 #include "../util/systhr.h" | |
| 39 | |
| 40 #include "../../ucx/utils.h" | |
| 41 #include "../../ucx/buffer.h" | |
| 42 | |
| 43 #include "srvctrl.h" | |
| 44 | |
| 45 #define SRVCTRL_THREAD_STACKSIZE 8192 | |
| 46 | |
| 47 static int srvctrl; | |
| 48 static sstr_t srvctrl_path; | |
| 49 | |
| 50 static WSBool srv_shutdown; | |
| 51 | |
| 52 int srvctrl_init(ServerConfiguration *cfg) { | |
| 53 // create srvctrl unix domain socket | |
| 54 // this socket is used for stop, reconfigure and other operations | |
| 55 srvctrl_path = ucx_sprintf("%s/private/srvctrl.sock", cfg->tmp.ptr); | |
| 56 struct sockaddr_un addr; | |
| 57 if(srvctrl_path.length > sizeof(addr.sun_path)-1) { | |
| 58 log_ereport( | |
| 59 LOG_CATASTROPHE, | |
| 60 "path '%s' too long for unix domain socket", | |
| 61 srvctrl_path.ptr); | |
| 62 return -1; | |
| 63 } | |
| 64 | |
| 65 // make sure there is no old srvctrl socket file | |
| 66 // otherweise bind would fail | |
| 67 if(unlink(srvctrl_path.ptr)) { | |
| 68 if(errno != ENOENT) { | |
| 69 log_ereport( | |
| 70 LOG_CATASTROPHE, | |
| 71 "cannot unlink old srvctrl socket '%s': %s", | |
| 72 srvctrl_path.ptr, | |
| 73 strerror(errno)); | |
| 74 return -1; | |
| 75 } | |
| 76 } | |
| 77 | |
| 78 ZERO(&addr, sizeof(addr)); | |
| 79 addr.sun_family = AF_UNIX; | |
| 80 memcpy(addr.sun_path, srvctrl_path.ptr, srvctrl_path.length); | |
| 81 | |
| 82 srvctrl = socket(AF_UNIX, SOCK_STREAM, 0); | |
| 83 if(srvctrl == -1) { | |
| 84 log_ereport( | |
| 85 LOG_CATASTROPHE, | |
| 86 "Cannot create server control socket: %s", | |
| 87 strerror(errno)); | |
| 88 return -1; | |
| 89 } | |
| 90 if(bind(srvctrl, (struct sockaddr*)&addr, sizeof(addr))) { | |
| 91 log_ereport( | |
| 92 LOG_CATASTROPHE, | |
| 93 "srvctrl socket bind failed: %s", | |
| 94 strerror(errno)); | |
| 95 return -1; | |
| 96 } | |
| 97 | |
| 98 return 0; | |
| 99 } | |
| 100 | |
| 101 int srvctrl_wait() { | |
| 102 listen(srvctrl, 8); | |
| 103 | |
| 104 for(;;) { | |
| 105 int fd = accept(srvctrl, NULL, 0); | |
| 106 if(fd < 0) { | |
| 107 if(srv_shutdown) break; | |
| 108 log_ereport( | |
| 109 LOG_FAILURE, | |
| 110 "srvctrl: accept failed: %s", | |
| 111 strerror(errno)); | |
| 112 break; | |
| 113 } | |
| 114 | |
| 115 SrvCtrlClient *client = srvctrl_create_client(fd); | |
| 116 SYS_THREAD t = systhread_start( | |
| 117 SYSTHREAD_DEFAULT_PRIORITY, | |
| 118 SRVCTRL_THREAD_STACKSIZE, | |
| 119 (thrstartfunc)srvctrl_thread, | |
| 120 client); | |
| 121 systhread_detach(t); | |
| 122 | |
| 123 } | |
| 124 | |
| 125 close(srvctrl); | |
| 126 unlink(srvctrl_path.ptr); | |
| 127 free(srvctrl_path.ptr); | |
| 128 | |
| 129 return 0; | |
| 130 } | |
| 131 | |
| 132 void srvctrl_shutdown() { | |
| 133 srv_shutdown = TRUE; | |
| 134 shutdown(srvctrl, SHUT_RDWR); | |
| 135 } | |
| 136 | |
| 137 SrvCtrlClient* srvctrl_create_client(int fd) { | |
| 138 SrvCtrlClient *client = malloc(sizeof(SrvCtrlClient)); | |
| 139 ZERO(client, sizeof(SrvCtrlClient)); | |
| 140 client->fd = fd; | |
| 141 return client; | |
| 142 } | |
| 143 | |
| 144 void* srvctrl_thread(SrvCtrlClient *client) { | |
| 145 LogDup log; | |
| 146 log.write = (log_writefunc)srvctrl_log; | |
| 147 log.cookie = client; | |
| 148 log_add_logdup(&log); | |
| 149 | |
| 150 char buf[64]; | |
| 151 UcxBuffer *line = ucx_buffer_new(NULL, 32, UCX_BUFFER_AUTOEXTEND); | |
| 152 | |
| 153 ssize_t r; | |
| 154 WSBool br = FALSE; | |
| 155 while((r = read(client->fd, buf, 64)) > 0) { | |
| 156 for(int i=0;i<r;i++) { | |
| 157 char c = buf[i]; | |
| 158 if(c == '\n') { | |
| 159 sstr_t ln = sstrn(line->space, line->pos); | |
| 160 if(srvctrl_handle_cmd(client, ln)) { | |
| 161 br = TRUE; | |
| 162 break; | |
| 163 } | |
| 164 } else { | |
| 165 ucx_buffer_putc(line, c); | |
| 166 } | |
| 167 } | |
| 168 if(br) { | |
| 169 break; | |
| 170 } | |
| 171 } | |
| 172 log_remove_logdup(&log); | |
| 173 | |
| 174 ucx_buffer_free(line); | |
| 175 close(client->fd); | |
| 176 free(client); | |
| 177 return NULL; | |
| 178 } | |
| 179 | |
| 180 int srvctrl_handle_cmd(SrvCtrlClient *client, sstr_t cmd) { | |
| 181 if(!sstrcmp(cmd, S("reconfig"))) { | |
| 182 log_ereport(LOG_INFORM, "reconfigure server"); | |
| 183 if(webserver_reconfig()) { | |
| 184 log_ereport(LOG_FAILURE, "cannot reload config"); | |
| 185 } else { | |
| 186 log_ereport(LOG_INFORM, "reconfig: success"); | |
| 187 } | |
| 188 } else if(!sstrcmp(cmd, S("shutdown"))) { | |
| 189 webserver_shutdown(); | |
| 190 } else if(!sstrcmp(cmd, S("stat"))) { | |
| 191 // TODO: implement | |
| 192 } else if(!sstrcmp(cmd, S("log"))) { | |
| 193 return 0; | |
| 194 } else { | |
| 195 log_ereport( | |
| 196 LOG_FAILURE, | |
| 197 "unknown srvctrl command: %.*s", | |
| 198 (int)cmd.length, | |
| 199 cmd.ptr); | |
| 200 } | |
| 201 return 1; | |
| 202 } | |
| 203 | |
| 204 void srvctrl_log(SrvCtrlClient *client, char *msg, size_t len) { | |
| 205 char msgheader[4]; | |
| 206 msgheader[0] = SRV_MSG_LOG; | |
| 207 uint16_t msglen = len; | |
| 208 memcpy(&msgheader[1], &msglen, 2); | |
| 209 write(client->fd, msgheader, 3); | |
| 210 | |
| 211 size_t pos = 0; | |
| 212 ssize_t w = 0; | |
| 213 while(pos < len) { | |
| 214 w = write(client->fd, msg + pos, len - pos); | |
| 215 if(w <= 0) { | |
| 216 break; | |
| 217 } | |
| 218 pos += w; | |
| 219 } | |
| 220 } |
