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0c16b406 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 <string.h> | |
21 | #include <unistd.h> | |
22 | #include <sys/socket.h> | |
23 | #include <errno.h> | |
992ce9ef | 24 | #include <ctype.h> |
470938bd | 25 | #include <fcntl.h> |
0c16b406 FT |
26 | |
27 | #ifdef HAVE_CONFIG_H | |
28 | #include <config.h> | |
29 | #endif | |
30 | #include <utils.h> | |
31 | #include <log.h> | |
32 | #include <proc.h> | |
992ce9ef | 33 | #include <req.h> |
0c16b406 | 34 | |
6a7a868e | 35 | int stdmkchild(char **argv, void (*chinit)(void *), void *idata) |
0c16b406 | 36 | { |
0c16b406 FT |
37 | pid_t pid; |
38 | int fd[2]; | |
39 | ||
820f9137 | 40 | if(socketpair(PF_UNIX, SOCK_SEQPACKET, 0, fd)) |
0c16b406 FT |
41 | return(-1); |
42 | if((pid = fork()) < 0) | |
43 | return(-1); | |
44 | if(pid == 0) { | |
6a7a868e FT |
45 | if(chinit != NULL) |
46 | chinit(idata); | |
0c16b406 FT |
47 | dup2(fd[0], 0); |
48 | close(fd[0]); | |
470938bd | 49 | close(fd[1]); |
0c16b406 FT |
50 | execvp(argv[0], argv); |
51 | flog(LOG_WARNING, "could not exec child program %s: %s", argv[0], strerror(errno)); | |
52 | exit(127); | |
53 | } | |
54 | close(fd[0]); | |
470938bd | 55 | fcntl(fd[1], F_SETFD, FD_CLOEXEC); |
0c16b406 FT |
56 | return(fd[1]); |
57 | } | |
58 | ||
59 | int sendfd(int sock, int fd, char *data, size_t datalen) | |
60 | { | |
61 | struct msghdr msg; | |
62 | struct cmsghdr *cmsg; | |
63 | char cmbuf[CMSG_SPACE(sizeof(int))]; | |
64 | struct iovec bufvec; | |
65 | ||
66 | memset(&msg, 0, sizeof(msg)); | |
67 | msg.msg_iov = &bufvec; | |
68 | msg.msg_iovlen = 1; | |
69 | bufvec.iov_base = data; | |
70 | bufvec.iov_len = datalen; | |
71 | ||
72 | msg.msg_control = cmbuf; | |
73 | msg.msg_controllen = sizeof(cmbuf); | |
74 | cmsg = CMSG_FIRSTHDR(&msg); | |
75 | cmsg->cmsg_level = SOL_SOCKET; | |
76 | cmsg->cmsg_type = SCM_RIGHTS; | |
77 | cmsg->cmsg_len = CMSG_LEN(sizeof(int)); | |
78 | *((int *)CMSG_DATA(cmsg)) = fd; | |
79 | msg.msg_controllen = cmsg->cmsg_len; | |
80 | ||
81 | return(sendmsg(sock, &msg, MSG_NOSIGNAL | MSG_DONTWAIT)); | |
82 | } | |
83 | ||
84 | int recvfd(int sock, char **data, size_t *datalen) | |
85 | { | |
86 | int ret, fd; | |
3a42b6b1 | 87 | char *buf, cbuf[1024]; |
0c16b406 FT |
88 | struct msghdr msg; |
89 | struct cmsghdr *cmsg; | |
90 | struct iovec bufvec; | |
91 | ||
92 | buf = smalloc(65536); | |
93 | memset(&msg, 0, sizeof(msg)); | |
94 | ||
95 | msg.msg_iov = &bufvec; | |
96 | msg.msg_iovlen = 1; | |
97 | bufvec.iov_base = buf; | |
98 | bufvec.iov_len = 65536; | |
99 | msg.msg_control = cbuf; | |
100 | msg.msg_controllen = sizeof(cbuf); | |
101 | ||
102 | ret = recvmsg(sock, &msg, 0); | |
820f9137 | 103 | if(ret <= 0) { |
0c16b406 | 104 | free(buf); |
820f9137 FT |
105 | if(ret == 0) |
106 | errno = 0; | |
0c16b406 FT |
107 | return(-1); |
108 | } | |
109 | ||
110 | fd = -1; | |
111 | for(cmsg = CMSG_FIRSTHDR(&msg); cmsg != NULL; cmsg = CMSG_NXTHDR(&msg, cmsg)) { | |
112 | if((cmsg->cmsg_level == SOL_SOCKET) && (cmsg->cmsg_type == SCM_RIGHTS)) { | |
113 | fd = *((int *)CMSG_DATA(cmsg)); | |
114 | } | |
115 | } | |
116 | if(fd < 0) { | |
117 | free(buf); | |
118 | errno = EPROTO; | |
119 | return(-1); | |
120 | } | |
121 | buf = realloc(buf, ret); | |
122 | *data = buf; | |
123 | *datalen = ret; | |
124 | return(fd); | |
125 | } | |
992ce9ef | 126 | |
6a7a868e | 127 | pid_t stdforkserve(char **argv, struct hthead *req, int fd, void (*chinit)(void *), void *idata) |
992ce9ef FT |
128 | { |
129 | int i; | |
130 | char *ebuf, *p; | |
131 | pid_t pid; | |
132 | struct charvbuf args; | |
133 | ||
134 | if((pid = fork()) < 0) | |
135 | return(-1); | |
136 | if(pid == 0) { | |
6a7a868e FT |
137 | if(chinit != NULL) |
138 | chinit(idata); | |
139 | ||
992ce9ef FT |
140 | dup2(fd, 0); |
141 | dup2(fd, 1); | |
470938bd | 142 | close(fd); |
992ce9ef FT |
143 | |
144 | bufinit(args); | |
145 | for(i = 0; argv[i]; i++) | |
146 | bufadd(args, argv[i]); | |
147 | bufadd(args, req->method); | |
148 | bufadd(args, req->url); | |
149 | bufadd(args, req->rest); | |
150 | bufadd(args, NULL); | |
151 | ||
152 | for(i = 0; i < req->noheaders; i++) { | |
153 | ebuf = sstrdup(req->headers[i][0]); | |
154 | for(p = ebuf; *p; p++) { | |
155 | if(isalnum(*p)) | |
156 | *p = toupper(*p); | |
157 | else | |
158 | *p = '_'; | |
159 | } | |
160 | putenv(sprintf2("REQ_%s=%s", ebuf, req->headers[i][1])); | |
161 | } | |
162 | putenv(sprintf2("HTTP_VERSION=%s", req->ver)); | |
163 | ||
164 | execvp(args.b[0], args.b); | |
165 | flog(LOG_WARNING, "could not exec child program %s: %s", argv[0], strerror(errno)); | |
166 | exit(127); | |
167 | } | |
992ce9ef FT |
168 | return(pid); |
169 | } |