Commit | Line | Data |
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6a580c17 | 1 | /* |
2 | * Usage: as CGI script, but called by userv | |
3 | * environment variables are USERV_U_E_... | |
4 | */ | |
a33962ba | 5 | /* |
9028e234 IJ |
6 | * Copyright 1996-2013 Ian Jackson <ijackson@chiark.greenend.org.uk> |
7 | * Copyright 1998 David Damerell <damerell@chiark.greenend.org.uk> | |
8 | * Copyright 1999,2003 | |
9 | * Chancellor Masters and Scholars of the University of Cambridge | |
10 | * Copyright 2010 Tony Finch <fanf@dotat.at> | |
a33962ba | 11 | * |
12 | * This is free software; you can redistribute it and/or modify it | |
13 | * under the terms of the GNU General Public License as published by | |
9028e234 | 14 | * the Free Software Foundation; either version 3 of the License, or |
a33962ba | 15 | * (at your option) any later version. |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, but | |
18 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
20 | * General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
9028e234 | 23 | * along with userv-utils; if not, see http://www.gnu.org/licenses/. |
a33962ba | 24 | */ |
6a580c17 | 25 | |
26 | #include <stdio.h> | |
27 | #include <string.h> | |
28 | #include <ctype.h> | |
f7b4be5a | 29 | #include <getopt.h> |
6a580c17 | 30 | #include <unistd.h> |
31 | #include <sys/types.h> | |
32 | #include <sys/wait.h> | |
33 | #include <sys/stat.h> | |
34 | ||
35 | #include "ucgi.h" | |
36 | ||
f7b4be5a | 37 | static const char *const default_envok[]= { |
a8e8db26 MW |
38 | "AUTH_TYPE", |
39 | "CONTENT_LENGTH", | |
40 | "CONTENT_TYPE", | |
41 | "DOCUMENT_ROOT", | |
42 | "GATEWAY_INTERFACE", | |
43 | "HTTP_ACCEPT", | |
44 | "HTTP_ACCEPT_CHARSET", | |
45 | "HTTP_ACCEPT_ENCODING", | |
46 | "HTTP_ACCEPT_LANGUAGE", | |
47 | "HTTP_CACHE_CONTROL", | |
48 | "HTTP_CONNECTION", | |
49 | "HTTP_CONTENT_ENCODING", | |
50 | "HTTP_COOKIE", | |
51 | "HTTP_DNT", | |
52 | "HTTP_HOST", | |
53 | "HTTP_KEEP_ALIVE", | |
54 | "HTTP_NEGOTIATE", | |
55 | "HTTP_PRAGMA", | |
56 | "HTTP_REFERER", | |
57 | "HTTP_USER_AGENT", | |
58 | "HTTP_VIA", | |
59 | "HTTP_X_FORWARDED_FOR", | |
60 | "HTTPS", | |
61 | "PATH_INFO", | |
62 | "PATH_TRANSLATED", | |
63 | "QUERY_STRING", | |
564fbf9b MW |
64 | "REDIRECT_HANDLER", |
65 | "REDIRECT_SCRIPT_URI", | |
66 | "REDIRECT_SCRIPT_URL", | |
67 | "REDIRECT_STATUS", | |
68 | "REDIRECT_URL", | |
a8e8db26 MW |
69 | "REMOTE_ADDR", |
70 | "REMOTE_HOST", | |
71 | "REMOTE_USER", | |
72 | "REMOTE_IDENT", | |
73 | "REQUEST_METHOD", | |
74 | "REQUEST_URI", | |
75 | "SCRIPT_FILENAME", | |
76 | "SCRIPT_NAME", | |
77 | "SCRIPT_URI", | |
78 | "SCRIPT_URL", | |
79 | "SERVER_ADDR", | |
80 | "SERVER_ADMIN", | |
81 | "SERVER_NAME", | |
82 | "SERVER_PORT", | |
83 | "SERVER_PROTOCOL", | |
84 | "SERVER_SIGNATURE", | |
85 | "SERVER_SOFTWARE", | |
564fbf9b MW |
86 | "SSL_CIPHER", |
87 | "SSL_CLIENT_S_DN", | |
88 | "SSL_CLIENT_VERIFY", | |
89 | "SSL_PROTOCOL", | |
a8e8db26 MW |
90 | 0 |
91 | }; | |
6a580c17 | 92 | |
f601a2c6 MW |
93 | static void setenvar(const char *fulln, |
94 | const char *en, const char *ep, void *p) { | |
95 | xsetenv(en, ep, 1); | |
96 | unsetenv(fulln); | |
6a580c17 | 97 | } |
98 | ||
f7b4be5a | 99 | int main(int argc, char **argv) { |
f601a2c6 MW |
100 | char *scriptpath, *newvar; |
101 | const char *nextslash, *lastslash, *pathi, *ev, *ev2, *scriptdir, *av; | |
f7b4be5a | 102 | const char *const *envok; |
6a580c17 | 103 | const char **arguments; |
f601a2c6 | 104 | size_t scriptdirlen, scriptpathlen, l; |
6a580c17 | 105 | struct stat stab; |
f7b4be5a MW |
106 | int i, r, nargs; |
107 | const char *filters= 0; | |
6a580c17 | 108 | |
109 | ev= getenv("USERV_U_DEBUG"); | |
110 | if (ev && *ev) debugmode= 1; | |
111 | ||
6a3086f1 | 112 | D( if (debugmode) printf(";;; UCGITARGET\n"); ) |
0cd9d59d | 113 | if (argc > MAX_ARGS) error("too many arguments", 500); |
6a580c17 | 114 | |
f7b4be5a MW |
115 | for (;;) { |
116 | i= getopt(argc, argv, "+e:"); if (i < 0) break; | |
117 | switch (i) { | |
118 | case 'e': filters= optarg; break; | |
0cd9d59d | 119 | default: error("bad command line", 500); break; |
f7b4be5a MW |
120 | } |
121 | } | |
122 | argc -= optind; argv += optind; | |
123 | ||
0cd9d59d MW |
124 | if (!*argv) error("no script directory argument", 500); |
125 | ev= getenv("HOME"); if (!ev) error("no HOME env. var", 500); | |
6a580c17 | 126 | l= strlen(*argv)+strlen(ev); |
127 | newvar= xmalloc(l+2); | |
128 | sprintf(newvar,"%s/%s",ev,*argv); | |
129 | scriptdir= newvar; | |
130 | scriptdirlen= strlen(scriptdir); | |
131 | ||
f7b4be5a MW |
132 | if (filters) |
133 | envok= load_filters(LOADF_MUST, filters, LF_END); | |
134 | else { | |
135 | envok= load_filters(0, | |
136 | ".userv/ucgitarget.env-filter", | |
137 | "/etc/userv/ucgitarget.env-filter", | |
138 | LF_END); | |
6a580c17 | 139 | } |
140 | ||
aa0bce91 | 141 | filter_environment(0, "USERV_U_E_", envok, default_envok, setenvar, 0); |
6a580c17 | 142 | |
143 | scriptpath= 0; | |
144 | pathi= getenv("PATH_INFO"); | |
0cd9d59d | 145 | if (!pathi) error("PATH_INFO not found", 500); |
6a580c17 | 146 | lastslash= pathi; |
6a3086f1 MW |
147 | D( if (debugmode) { |
148 | printf(";; find script name...\n" | |
149 | ";; PATH_INFO = `%s'\n", | |
150 | pathi); | |
151 | } ) | |
6a580c17 | 152 | for (;;) { |
0cd9d59d MW |
153 | if (*lastslash != '/') error("PATH_INFO expected slash not found", 400); |
154 | if (lastslash[1]=='.' || lastslash[1]=='#' || !lastslash[1]) | |
155 | error("bad char begin", 400); | |
6a580c17 | 156 | nextslash= strchr(lastslash+1,'/'); |
157 | if (!nextslash) nextslash= lastslash+1+strlen(lastslash+1); | |
0cd9d59d MW |
158 | if (!nextslash) error("insufficient elements in PATH_INFO", 400); |
159 | if (nextslash==lastslash+1) error("empty component in PATH_INFO", 400); | |
160 | if (nextslash-pathi > MAX_SCRIPTPATH_LEN) | |
161 | error("PATH_INFO script path too long", 400); | |
6a580c17 | 162 | scriptpathlen= scriptdirlen+(nextslash-pathi); |
163 | scriptpath= xrealloc(scriptpath,scriptpathlen+1); | |
164 | strcpy(scriptpath,scriptdir); | |
165 | memcpy(scriptpath+scriptdirlen,pathi,nextslash-pathi); | |
166 | scriptpath[scriptpathlen]= 0; | |
0cd9d59d | 167 | if (scriptpath[scriptpathlen-1]=='~') error("bad char end", 400); |
6a3086f1 | 168 | D( if (debugmode) printf(";; try `%s'\n", scriptpath); ) |
6a580c17 | 169 | r= stat(scriptpath,&stab); if (r) syserror("stat script"); |
170 | if (S_ISREG(stab.st_mode)) break; | |
0cd9d59d | 171 | if (!S_ISDIR(stab.st_mode)) error("script not directory or file", 500); |
6a580c17 | 172 | lastslash= nextslash; |
173 | } | |
6a3086f1 | 174 | D( if (debugmode) printf(";; found script: tail = `%s'\n", nextslash); ) |
6a580c17 | 175 | if (*nextslash) xsetenv("PATH_INFO",nextslash,1); |
176 | else unsetenv("PATH_INFO"); | |
177 | ||
178 | newvar= xmalloc(scriptpathlen+strlen(nextslash)+3); | |
179 | sprintf(newvar,"%s%s",scriptpath,nextslash); | |
180 | xsetenv("PATH_TRANSLATED",newvar,1); | |
181 | ||
182 | xsetenv("SCRIPT_FILENAME",scriptpath,1); | |
183 | ||
184 | ev= getenv("SCRIPT_NAME"); | |
185 | if (ev) { | |
0cd9d59d | 186 | ev2= getenv("USER"); if (!ev2) error("no USER variable", 500); |
6a580c17 | 187 | newvar= xmalloc(strlen(ev)+2+strlen(ev2)+scriptpathlen-scriptdirlen+2); |
188 | sprintf(newvar,"%s/~%s%s",ev,ev2,scriptpath+scriptdirlen); | |
189 | xsetenv("SCRIPT_NAME",newvar,1); | |
190 | } | |
191 | ||
192 | arguments= xmalloc(sizeof(const char*)*(argc+5)); | |
193 | nargs= 0; | |
194 | ||
195 | arguments[nargs++]= scriptpath; | |
196 | while ((av= (*++argv))) arguments[nargs++]= av; | |
197 | arguments[nargs++]= 0; | |
198 | ||
6a3086f1 MW |
199 | D( if (debugmode) { |
200 | int i; | |
201 | ||
202 | printf(";; final environment...\n"); | |
203 | for (i = 0; environ[i]; i++) | |
204 | printf(";; %s\n", environ[i]); | |
205 | ||
206 | printf(";; final command line...\n"); | |
207 | for (i = 0; arguments[i]; i++) | |
208 | printf(";; %s\n", arguments[i]); | |
209 | fflush(stdout); | |
210 | } ) | |
211 | ||
6a580c17 | 212 | execvp(scriptpath,(char*const*)arguments); |
213 | syserror("exec script"); | |
214 | return -1; | |
215 | } |