comparison: src/server/daemon/srvctrl.c
src/server/daemon/srvctrl.c
- branch
- srvctrl
- changeset 158
- 77f4f0079428
- child 166
- c07122f66676
equal
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| 156:724e107983e9 | 158:77f4f0079428 |
|---|---|
| 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 | |
| 32 #include "webserver.h" | |
| 33 | |
| 34 #include "../util/systhr.h" | |
| 35 | |
| 36 #include "../../ucx/utils.h" | |
| 37 #include "../../ucx/buffer.h" | |
| 38 | |
| 39 #include "srvctrl.h" | |
| 40 | |
| 41 #define SRVCTRL_THREAD_STACKSIZE 8192 | |
| 42 | |
| 43 static int srvctrl; | |
| 44 static WSBool srv_shutdown; | |
| 45 | |
| 46 int srvctrl_init(ServerConfiguration *cfg) { | |
| 47 // create srvctrl unix domain socket | |
| 48 // this socket is used for stop, reconfigure and other operations | |
| 49 sstr_t uds_path = ucx_sprintf("%s/private/srvctrl.sock", cfg->tmp.ptr); | |
| 50 struct sockaddr_un addr; | |
| 51 if(uds_path.length > sizeof(addr.sun_path)-1) { | |
| 52 log_ereport( | |
| 53 LOG_CATASTROPHE, | |
| 54 "path '%s' too long for unix domain socket", | |
| 55 uds_path.ptr); | |
| 56 return -1; | |
| 57 } | |
| 58 | |
| 59 // make sure there is no old srvctrl socket file | |
| 60 // otherweise bind would fail | |
| 61 if(unlink(uds_path.ptr)) { | |
| 62 if(errno != ENOENT) { | |
| 63 log_ereport( | |
| 64 LOG_CATASTROPHE, | |
| 65 "cannot unlink old srvctrl socket '%s': %s", | |
| 66 uds_path.ptr, | |
| 67 strerror(errno)); | |
| 68 return -1; | |
| 69 } | |
| 70 } | |
| 71 | |
| 72 ZERO(&addr, sizeof(addr)); | |
| 73 addr.sun_family = AF_UNIX; | |
| 74 memcpy(addr.sun_path, uds_path.ptr, uds_path.length); | |
| 75 | |
| 76 srvctrl = socket(AF_UNIX, SOCK_STREAM, 0); | |
| 77 if(srvctrl == -1) { | |
| 78 log_ereport( | |
| 79 LOG_CATASTROPHE, | |
| 80 "Cannot create server control socket: %s", | |
| 81 strerror(errno)); | |
| 82 return -1; | |
| 83 } | |
| 84 if(bind(srvctrl, (struct sockaddr*)&addr, sizeof(addr))) { | |
| 85 log_ereport( | |
| 86 LOG_CATASTROPHE, | |
| 87 "srvctrl socket bind failed: %s", | |
| 88 strerror(errno)); | |
| 89 return -1; | |
| 90 } | |
| 91 | |
| 92 free(uds_path.ptr); | |
| 93 | |
| 94 return 0; | |
| 95 } | |
| 96 | |
| 97 int srvctrl_wait() { | |
| 98 listen(srvctrl, 8); | |
| 99 | |
| 100 for(;;) { | |
| 101 int fd = accept(srvctrl, NULL, 0); | |
| 102 if(fd < 0) { | |
| 103 if(srv_shutdown) { | |
| 104 break; | |
| 105 } | |
| 106 | |
| 107 log_ereport( | |
| 108 LOG_FAILURE, | |
| 109 "srvctrl: accept failed: %s", | |
| 110 strerror(errno)); | |
| 111 continue; | |
| 112 } | |
| 113 | |
| 114 SrvCtrlClient *client = srvctrl_create_client(fd); | |
| 115 SYS_THREAD t = systhread_start( | |
| 116 SYSTHREAD_DEFAULT_PRIORITY, | |
| 117 SRVCTRL_THREAD_STACKSIZE, | |
| 118 (thrstartfunc)srvctrl_thread, | |
| 119 client); | |
| 120 systhread_detach(t); | |
| 121 | |
| 122 } | |
| 123 } | |
| 124 | |
| 125 void srvctrl_shutdown() { | |
| 126 srv_shutdown = TRUE; | |
| 127 close(srvctrl); | |
| 128 } | |
| 129 | |
| 130 SrvCtrlClient* srvctrl_create_client(int fd) { | |
| 131 SrvCtrlClient *client = malloc(sizeof(SrvCtrlClient)); | |
| 132 ZERO(client, sizeof(SrvCtrlClient)); | |
| 133 client->fd = fd; | |
| 134 return client; | |
| 135 } | |
| 136 | |
| 137 void* srvctrl_thread(SrvCtrlClient *client) { | |
| 138 char buf[64]; | |
| 139 UcxBuffer *line = ucx_buffer_new(NULL, 32, UCX_BUFFER_AUTOEXTEND); | |
| 140 | |
| 141 ssize_t r; | |
| 142 WSBool br = FALSE; | |
| 143 while((r = read(client->fd, buf, 64)) > 0) { | |
| 144 for(int i=0;i<r;i++) { | |
| 145 char c = buf[i]; | |
| 146 if(c == '\n') { | |
| 147 sstr_t ln = sstrn(line->space, line->pos); | |
| 148 if(srvctrl_handle_cmd(client, ln)) { | |
| 149 br = TRUE; | |
| 150 break; | |
| 151 } | |
| 152 } else { | |
| 153 ucx_buffer_putc(line, c); | |
| 154 } | |
| 155 } | |
| 156 if(br) { | |
| 157 break; | |
| 158 } | |
| 159 } | |
| 160 | |
| 161 ucx_buffer_free(line); | |
| 162 close(client->fd); | |
| 163 free(client); | |
| 164 | |
| 165 return NULL; | |
| 166 } | |
| 167 | |
| 168 int srvctrl_handle_cmd(SrvCtrlClient *client, sstr_t cmd) { | |
| 169 if(!sstrcmp(cmd, S("reconfig"))) { | |
| 170 write(client->fd, "reconfig\n", 9); | |
| 171 | |
| 172 if(webserver_reconfig()) { | |
| 173 log_ereport(LOG_FAILURE, "cannot reload config"); | |
| 174 } else { | |
| 175 log_ereport(LOG_INFORM, "reconfig: success"); | |
| 176 } | |
| 177 } else if(!sstrcmp(cmd, S("shutdown"))) { | |
| 178 webserver_shutdown(); | |
| 179 } else { | |
| 180 log_ereport( | |
| 181 LOG_FAILURE, | |
| 182 "unknown srvctrl command: %.*s", | |
| 183 (int)cmd.length, | |
| 184 cmd.ptr); | |
| 185 } | |
| 186 return 1; | |
| 187 } |
