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048ac115 FT |
1 | /* |
2 | ashd - A Sane HTTP Daemon | |
3 | Copyright (C) 2008 Fredrik Tolf <fredrik@dolda2000.com> | |
4 | ||
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. | |
9 | ||
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. | |
14 | ||
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/>. | |
17 | */ | |
18 | ||
19 | #include <stdlib.h> | |
20 | #include <stdio.h> | |
21 | #include <unistd.h> | |
22 | #include <string.h> | |
23 | #include <errno.h> | |
24 | #include <sys/poll.h> | |
25 | #include <time.h> | |
26 | #include <sys/time.h> | |
f99bcc64 | 27 | #include <signal.h> |
472abd3c | 28 | #include <fcntl.h> |
048ac115 FT |
29 | |
30 | #ifdef HAVE_CONFIG_H | |
31 | #include <config.h> | |
32 | #endif | |
33 | #include <utils.h> | |
34 | #include <log.h> | |
35 | #include <req.h> | |
36 | #include <proc.h> | |
37 | ||
38 | #define DEFFORMAT "%{%Y-%m-%d %H:%M:%S}t %m %u %A \"%G\"" | |
39 | ||
40 | static int ch; | |
f99bcc64 | 41 | static char *outname = NULL; |
048ac115 FT |
42 | static FILE *out; |
43 | static int flush = 1; | |
44 | static char *format; | |
af222eef | 45 | static struct timeval now; |
f99bcc64 | 46 | static volatile int reopen = 0; |
048ac115 FT |
47 | |
48 | static void qputs(char *s, FILE *o) | |
49 | { | |
50 | for(; *s; s++) { | |
51 | if(*s == '\"') { | |
52 | fputs("\\\"", o); | |
53 | } else if(*s == '\\') { | |
54 | fputs("\\\\", o); | |
55 | } else if(*s == '\n') { | |
56 | fputs("\\n", o); | |
57 | } else if(*s == '\t') { | |
58 | fputs("\\t", o); | |
59 | } else if((*s < 32) || (*s >= 128)) { | |
60 | fprintf(o, "\\x%02x", *s); | |
61 | } else { | |
62 | fputc(*s, o); | |
63 | } | |
64 | } | |
65 | } | |
66 | ||
67 | static void logitem(struct hthead *req, char o, char *d) | |
68 | { | |
69 | char *h, *p; | |
70 | char buf[1024]; | |
048ac115 FT |
71 | |
72 | switch(o) { | |
73 | case '%': | |
74 | putc('%', out); | |
75 | break; | |
76 | case 'h': | |
77 | if((h = getheader(req, d)) == NULL) { | |
78 | putc('-', out); | |
79 | } else { | |
80 | qputs(h, out); | |
81 | } | |
82 | break; | |
83 | case 'u': | |
84 | qputs(req->url, out); | |
85 | break; | |
86 | case 'U': | |
87 | strcpy(buf, req->url); | |
88 | if((p = strchr(buf, '?')) != NULL) | |
89 | *p = 0; | |
90 | qputs(buf, out); | |
91 | break; | |
92 | case 'm': | |
93 | qputs(req->method, out); | |
94 | break; | |
95 | case 'r': | |
96 | qputs(req->rest, out); | |
97 | break; | |
98 | case 'v': | |
99 | qputs(req->ver, out); | |
100 | break; | |
101 | case 't': | |
102 | if(!*d) | |
103 | d = "%a, %d %b %Y %H:%M:%S %z"; | |
af222eef | 104 | strftime(buf, sizeof(buf), d, localtime(&now.tv_sec)); |
048ac115 FT |
105 | qputs(buf, out); |
106 | break; | |
107 | case 'T': | |
108 | if(!*d) | |
109 | d = "%a, %d %b %Y %H:%M:%S %z"; | |
af222eef | 110 | strftime(buf, sizeof(buf), d, gmtime(&now.tv_sec)); |
048ac115 FT |
111 | qputs(buf, out); |
112 | break; | |
113 | case 's': | |
af222eef | 114 | fprintf(out, "%06i", (int)now.tv_usec); |
048ac115 FT |
115 | break; |
116 | case 'A': | |
117 | logitem(req, 'h', "X-Ash-Address"); | |
118 | break; | |
119 | case 'H': | |
120 | logitem(req, 'h', "Host"); | |
121 | break; | |
122 | case 'R': | |
123 | logitem(req, 'h', "Referer"); | |
124 | break; | |
125 | case 'G': | |
126 | logitem(req, 'h', "User-Agent"); | |
127 | break; | |
128 | } | |
129 | } | |
130 | ||
131 | static void logreq(struct hthead *req) | |
132 | { | |
133 | char *p, *p2; | |
134 | char d[strlen(format)]; | |
135 | char o; | |
136 | ||
137 | p = format; | |
138 | while(*p) { | |
139 | if(*p == '%') { | |
140 | p++; | |
141 | if(*p == '{') { | |
142 | p++; | |
143 | if((p2 = strchr(p, '}')) == NULL) | |
144 | continue; | |
145 | memcpy(d, p, p2 - p); | |
146 | d[p2 - p] = 0; | |
147 | p = p2 + 1; | |
148 | } else { | |
149 | d[0] = 0; | |
150 | } | |
151 | o = *p++; | |
152 | if(o == 0) | |
153 | break; | |
154 | logitem(req, o, d); | |
155 | } else { | |
156 | fputc(*p++, out); | |
157 | } | |
158 | } | |
159 | fputc('\n', out); | |
160 | if(flush) | |
161 | fflush(out); | |
162 | } | |
163 | ||
164 | static void serve(struct hthead *req, int fd) | |
165 | { | |
af222eef | 166 | gettimeofday(&now, NULL); |
048ac115 FT |
167 | if(sendreq(ch, req, fd)) { |
168 | flog(LOG_ERR, "accesslog: could not pass request to child: %s", strerror(errno)); | |
169 | exit(1); | |
170 | } | |
171 | logreq(req); | |
172 | } | |
173 | ||
f99bcc64 FT |
174 | static void sighandler(int sig) |
175 | { | |
176 | if(sig == SIGHUP) | |
177 | reopen = 1; | |
178 | } | |
179 | ||
180 | static void reopenlog(void) | |
181 | { | |
182 | FILE *new; | |
183 | ||
184 | if(outname == NULL) { | |
185 | flog(LOG_WARNING, "accesslog: received SIGHUP but logging to stdout, so ignoring"); | |
186 | return; | |
187 | } | |
188 | if((new = fopen(outname, "a")) == NULL) { | |
189 | flog(LOG_WARNING, "accesslog: could not reopen log file `%s' on SIGHUP: %s", outname, strerror(errno)); | |
190 | return; | |
191 | } | |
192 | fclose(out); | |
193 | out = new; | |
194 | } | |
195 | ||
048ac115 FT |
196 | static void usage(FILE *out) |
197 | { | |
472abd3c | 198 | fprintf(out, "usage: accesslog [-hFa] [-f FORMAT] [-p PIDFILE] OUTFILE CHILD [ARGS...]\n"); |
048ac115 FT |
199 | } |
200 | ||
201 | int main(int argc, char **argv) | |
202 | { | |
203 | int c, ret; | |
204 | struct hthead *req; | |
205 | int fd; | |
206 | struct pollfd pfd[2]; | |
472abd3c FT |
207 | char *pidfile; |
208 | FILE *pidout; | |
048ac115 | 209 | |
472abd3c FT |
210 | pidfile = NULL; |
211 | while((c = getopt(argc, argv, "+hFaf:p:")) >= 0) { | |
048ac115 FT |
212 | switch(c) { |
213 | case 'h': | |
214 | usage(stdout); | |
215 | exit(0); | |
048ac115 FT |
216 | case 'F': |
217 | flush = 0; | |
218 | break; | |
219 | case 'f': | |
220 | format = optarg; | |
221 | break; | |
472abd3c FT |
222 | case 'p': |
223 | pidfile = optarg; | |
224 | break; | |
048ac115 FT |
225 | case 'a': |
226 | format = "%A - - [%{%d/%b/%Y:%H:%M:%S %z}t] \"%m %u %v\" - - \"%R\" \"%G\""; | |
227 | break; | |
228 | default: | |
229 | usage(stderr); | |
230 | exit(1); | |
231 | } | |
232 | } | |
9701afc5 | 233 | if(argc - optind < 2) { |
048ac115 FT |
234 | usage(stderr); |
235 | exit(1); | |
236 | } | |
237 | if(format == NULL) | |
238 | format = DEFFORMAT; | |
f99bcc64 FT |
239 | if(!strcmp(argv[optind], "-")) |
240 | outname = NULL; | |
241 | else | |
242 | outname = argv[optind]; | |
243 | if(outname == NULL) { | |
9701afc5 FT |
244 | out = stdout; |
245 | } else { | |
246 | if((out = fopen(argv[optind], "a")) == NULL) { | |
247 | flog(LOG_ERR, "accesslog: could not open %s for logging: %s", argv[optind], strerror(errno)); | |
048ac115 FT |
248 | exit(1); |
249 | } | |
048ac115 | 250 | } |
9701afc5 | 251 | if((ch = stdmkchild(argv + optind + 1, NULL, NULL)) < 0) { |
e3f12675 | 252 | flog(LOG_ERR, "accesslog: could not fork child: %s", strerror(errno)); |
048ac115 FT |
253 | exit(1); |
254 | } | |
f99bcc64 | 255 | signal(SIGHUP, sighandler); |
472abd3c FT |
256 | if(pidfile) { |
257 | if(!strcmp(pidfile, "-")) { | |
258 | if(!outname) { | |
259 | flog(LOG_ERR, "accesslog: cannot derive PID file name without an output file"); | |
260 | exit(1); | |
261 | } | |
262 | pidfile = sprintf2("%s.pid", outname); | |
263 | } | |
264 | if((pidout = fopen(pidfile, "w")) == NULL) { | |
265 | flog(LOG_ERR, "accesslog: could not open PID file %s for writing: %s", pidfile); | |
266 | exit(1); | |
267 | } | |
268 | fprintf(pidout, "%i\n", (int)getpid()); | |
269 | fclose(pidout); | |
270 | } | |
048ac115 | 271 | while(1) { |
f99bcc64 FT |
272 | if(reopen) { |
273 | reopenlog(); | |
274 | reopen = 0; | |
275 | } | |
048ac115 FT |
276 | memset(pfd, 0, sizeof(pfd)); |
277 | pfd[0].fd = 0; | |
278 | pfd[0].events = POLLIN; | |
279 | pfd[1].fd = ch; | |
280 | pfd[1].events = POLLHUP; | |
281 | if((ret = poll(pfd, 2, -1)) < 0) { | |
282 | if(errno != EINTR) { | |
283 | flog(LOG_ERR, "accesslog: error in poll: %s", strerror(errno)); | |
284 | exit(1); | |
285 | } | |
286 | } | |
287 | if(pfd[0].revents) { | |
288 | if((fd = recvreq(0, &req)) < 0) { | |
289 | if(errno == 0) | |
290 | break; | |
291 | flog(LOG_ERR, "accesslog: error in recvreq: %s", strerror(errno)); | |
292 | exit(1); | |
293 | } | |
294 | serve(req, fd); | |
295 | freehthead(req); | |
296 | close(fd); | |
297 | } | |
298 | if(pfd[1].revents & POLLHUP) | |
299 | break; | |
300 | } | |
472abd3c FT |
301 | if(pidfile != NULL) |
302 | unlink(pidfile); | |
048ac115 FT |
303 | return(0); |
304 | } |