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805fef2b 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 <stdio.h> | |
20 | #include <stdlib.h> | |
21 | #include <unistd.h> | |
0bde126e | 22 | #include <string.h> |
805fef2b FT |
23 | #include <errno.h> |
24 | #include <err.h> | |
25 | #include <sys/poll.h> | |
26 | #include <sys/socket.h> | |
27 | #include <sys/un.h> | |
28 | #include <sys/stat.h> | |
29 | #include <sys/wait.h> | |
30 | ||
31 | #ifdef HAVE_CONFIG_H | |
32 | #include <config.h> | |
33 | #endif | |
34 | #include <utils.h> | |
35 | #include <log.h> | |
36 | #include <req.h> | |
37 | #include <proc.h> | |
38 | ||
39 | static void usage(FILE *out) | |
40 | { | |
41 | fprintf(out, "usge: htpipe [-h] [-CS] SOCKET-PATH [CHILD ARGS...]\n"); | |
42 | } | |
43 | ||
44 | static int clconnect(char *path) | |
45 | { | |
46 | int sk; | |
47 | struct sockaddr_un unm; | |
48 | ||
49 | if((sk = socket(AF_UNIX, SOCK_SEQPACKET, 0)) < 0) | |
50 | return(-1); | |
51 | memset(&unm, 0, sizeof(unm)); | |
52 | unm.sun_family = AF_UNIX; | |
53 | strcpy(unm.sun_path, path); | |
54 | if(connect(sk, (struct sockaddr *)&unm, sizeof(unm))) { | |
55 | close(sk); | |
56 | return(-1); | |
57 | } | |
58 | return(sk); | |
59 | } | |
60 | ||
61 | static int mklisten(char *path) | |
62 | { | |
63 | int sk; | |
64 | struct sockaddr_un unm; | |
65 | struct stat sb; | |
66 | ||
67 | if(!stat(path, &sb) && S_ISSOCK(sb.st_mode)) | |
68 | unlink(path); | |
69 | if((sk = socket(AF_UNIX, SOCK_SEQPACKET, 0)) < 0) | |
70 | return(-1); | |
71 | memset(&unm, 0, sizeof(unm)); | |
72 | unm.sun_family = AF_UNIX; | |
73 | strcpy(unm.sun_path, path); | |
74 | if(bind(sk, (struct sockaddr *)&unm, sizeof(unm)) || listen(sk, 128)) { | |
75 | close(sk); | |
76 | return(-1); | |
77 | } | |
78 | return(sk); | |
79 | } | |
80 | ||
81 | static void runclient(int sk) | |
82 | { | |
83 | int fd; | |
84 | struct hthead *req; | |
85 | ||
86 | while(1) { | |
87 | if((fd = recvreq(0, &req)) < 0) { | |
88 | if(errno == 0) | |
89 | break; | |
90 | flog(LOG_ERR, "htpipe: error in recvreq: %s", strerror(errno)); | |
91 | exit(1); | |
92 | } | |
93 | if(sendreq(sk, req, fd)) { | |
94 | flog(LOG_ERR, "htpipe: could not pass request across pipe: %s", strerror(errno)); | |
95 | exit(1); | |
96 | } | |
97 | freehthead(req); | |
98 | close(fd); | |
99 | } | |
100 | } | |
101 | ||
102 | static void runserver(int lsk, int ch) | |
103 | { | |
104 | int i, o, ret, rfd, ncl, *cl, acl; | |
105 | struct hthead *req; | |
106 | ||
107 | ncl = 0; | |
3840f76d | 108 | cl = NULL; |
805fef2b FT |
109 | while(1) { |
110 | struct pollfd pfd[ncl + 1]; | |
111 | for(i = 0; i < ncl; i++) { | |
112 | pfd[i].fd = cl[i]; | |
113 | pfd[i].events= POLLIN; | |
114 | } | |
115 | pfd[i].fd = lsk; | |
116 | pfd[i].events = POLLIN; | |
117 | if((ret = poll(pfd, ncl + 1, -1)) < 0) { | |
118 | if(errno != EINTR) { | |
119 | flog(LOG_ERR, "htpipe: error in poll: %s", strerror(errno)); | |
120 | exit(1); | |
121 | } | |
122 | } | |
123 | for(i = 0; i < ncl; i++) { | |
124 | if(pfd[i].revents & POLLIN) { | |
125 | if((rfd = recvreq(cl[i], &req)) < 0) { | |
126 | if(errno != 0) | |
127 | flog(LOG_ERR, "htpipe: error from client: %s", strerror(errno)); | |
62687b1f | 128 | close(cl[i]); |
805fef2b FT |
129 | cl[i] = -1; |
130 | } else { | |
131 | if(sendreq(ch, req, rfd)) { | |
132 | flog(LOG_ERR, "htpipe: could not pass request to child: %s", strerror(errno)); | |
133 | exit(1); | |
134 | } | |
135 | freehthead(req); | |
136 | close(rfd); | |
137 | } | |
138 | } | |
139 | } | |
140 | if(pfd[i].revents & POLLIN) { | |
141 | if((acl = accept(lsk, NULL, 0)) < 0) { | |
142 | flog(LOG_ERR, "htpipe: error in accept: %s", strerror(errno)); | |
143 | } else { | |
144 | cl = srealloc(cl, sizeof(*cl) * (ncl + 1)); | |
145 | cl[ncl++] = acl; | |
146 | } | |
147 | } | |
148 | for(i = o = 0; i < ncl; i++) { | |
149 | if(cl[i] >= 0) | |
150 | cl[o++] = cl[i]; | |
151 | } | |
152 | ncl = o; | |
153 | } | |
154 | } | |
155 | ||
156 | int main(int argc, char **argv) | |
157 | { | |
158 | int c, cli, srv, sk, ch, sst; | |
159 | pid_t sproc; | |
160 | char *path, **chspec; | |
161 | ||
162 | cli = srv = 0; | |
163 | while((c = getopt(argc, argv, "+hCS")) >= 0) { | |
164 | switch(c) { | |
165 | case 'h': | |
166 | usage(stdout); | |
167 | exit(0); | |
168 | case 'C': | |
169 | cli = 1; | |
170 | break; | |
171 | case 'S': | |
172 | srv = 1; | |
173 | break; | |
174 | } | |
175 | } | |
176 | if(argc - optind < 1) { | |
177 | usage(stderr); | |
178 | exit(1); | |
179 | } | |
180 | path = argv[optind++]; | |
181 | chspec = argv + optind; | |
182 | if(cli) { | |
183 | if((sk = clconnect(path)) < 0) { | |
184 | flog(LOG_ERR, "htpipe: %s: %s", path, strerror(errno)); | |
185 | exit(1); | |
186 | } | |
187 | runclient(sk); | |
188 | } else if(srv) { | |
189 | if(!*chspec) { | |
190 | usage(stderr); | |
191 | exit(1); | |
192 | } | |
193 | if((sk = mklisten(path)) < 0) { | |
194 | flog(LOG_ERR, "htpipe: %s: %s", path, strerror(errno)); | |
195 | exit(1); | |
196 | } | |
197 | if((ch = stdmkchild(chspec, NULL, NULL)) < 0) { | |
198 | flog(LOG_ERR, "htpipe: could not fork child: %s", strerror(errno)); | |
199 | exit(1); | |
200 | } | |
201 | runserver(sk, ch); | |
202 | } else { | |
203 | if(!*chspec) { | |
204 | usage(stderr); | |
205 | exit(1); | |
206 | } | |
207 | if((sk = clconnect(path)) < 0) { | |
208 | if((sproc = fork()) < 0) | |
209 | err(1, "fork"); | |
210 | if(sproc == 0) { | |
211 | if((sk = mklisten(path)) < 0) { | |
212 | flog(LOG_ERR, "htpipe: %s: %s", path, strerror(errno)); | |
213 | exit(1); | |
214 | } | |
215 | if((ch = stdmkchild(chspec, NULL, NULL)) < 0) { | |
216 | flog(LOG_ERR, "htpipe: could not fork child: %s", strerror(errno)); | |
217 | exit(1); | |
218 | } | |
219 | daemon(0, 1); | |
220 | runserver(sk, ch); | |
221 | abort(); | |
222 | } | |
223 | if((waitpid(sproc, &sst, 0)) != sproc) { | |
224 | flog(LOG_ERR, "htpipe: could not wait for server process: %s", strerror(errno)); | |
225 | exit(1); | |
226 | } | |
227 | if((sk = clconnect(path)) < 0) { | |
228 | flog(LOG_ERR, "htpipe: could not connect to newly forked server: %s", strerror(errno)); | |
229 | exit(1); | |
230 | } | |
231 | } | |
232 | runclient(sk); | |
233 | } | |
234 | return(0); | |
235 | } |