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 | /* |
711a0748 | 6 | * Copyright (C) 1998-1999,2003 Ian Jackson |
a33962ba | 7 | * |
8 | * This is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with userv-utils; if not, write to the Free Software | |
20 | * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
21 | * | |
22 | * $Id$ | |
23 | */ | |
6a580c17 | 24 | |
25 | #include <stdio.h> | |
26 | #include <string.h> | |
27 | #include <ctype.h> | |
28 | #include <unistd.h> | |
29 | #include <sys/types.h> | |
30 | #include <sys/wait.h> | |
31 | #include <sys/stat.h> | |
32 | ||
33 | #include "ucgi.h" | |
34 | ||
a8e8db26 MW |
35 | static const char *const envok[]= { |
36 | "AUTH_TYPE", | |
37 | "CONTENT_LENGTH", | |
38 | "CONTENT_TYPE", | |
39 | "DOCUMENT_ROOT", | |
40 | "GATEWAY_INTERFACE", | |
41 | "HTTP_ACCEPT", | |
42 | "HTTP_ACCEPT_CHARSET", | |
43 | "HTTP_ACCEPT_ENCODING", | |
44 | "HTTP_ACCEPT_LANGUAGE", | |
45 | "HTTP_CACHE_CONTROL", | |
46 | "HTTP_CONNECTION", | |
47 | "HTTP_CONTENT_ENCODING", | |
48 | "HTTP_COOKIE", | |
49 | "HTTP_DNT", | |
50 | "HTTP_HOST", | |
51 | "HTTP_KEEP_ALIVE", | |
52 | "HTTP_NEGOTIATE", | |
53 | "HTTP_PRAGMA", | |
54 | "HTTP_REFERER", | |
55 | "HTTP_USER_AGENT", | |
56 | "HTTP_VIA", | |
57 | "HTTP_X_FORWARDED_FOR", | |
58 | "HTTPS", | |
59 | "PATH_INFO", | |
60 | "PATH_TRANSLATED", | |
61 | "QUERY_STRING", | |
62 | "REMOTE_ADDR", | |
63 | "REMOTE_HOST", | |
64 | "REMOTE_USER", | |
65 | "REMOTE_IDENT", | |
66 | "REQUEST_METHOD", | |
67 | "REQUEST_URI", | |
68 | "SCRIPT_FILENAME", | |
69 | "SCRIPT_NAME", | |
70 | "SCRIPT_URI", | |
71 | "SCRIPT_URL", | |
72 | "SERVER_ADDR", | |
73 | "SERVER_ADMIN", | |
74 | "SERVER_NAME", | |
75 | "SERVER_PORT", | |
76 | "SERVER_PROTOCOL", | |
77 | "SERVER_SIGNATURE", | |
78 | "SERVER_SOFTWARE", | |
79 | 0 | |
80 | }; | |
81 | ||
f601a2c6 MW |
82 | static void setenvar(const char *fulln, |
83 | const char *en, const char *ep, void *p) { | |
84 | xsetenv(en, ep, 1); | |
85 | unsetenv(fulln); | |
86 | } | |
87 | ||
6a580c17 | 88 | int main(int argc, const char **argv) { |
f601a2c6 MW |
89 | char *scriptpath, *newvar; |
90 | const char *nextslash, *lastslash, *pathi, *ev, *ev2, *scriptdir, *av; | |
6a580c17 | 91 | const char **arguments; |
f601a2c6 | 92 | size_t scriptdirlen, scriptpathlen, l; |
6a580c17 | 93 | struct stat stab; |
94 | int r, nargs; | |
95 | ||
96 | ev= getenv("USERV_U_DEBUG"); | |
97 | if (ev && *ev) debugmode= 1; | |
98 | ||
6a3086f1 | 99 | D( if (debugmode) printf(";;; UCGITARGET\n"); ) |
6a580c17 | 100 | if (argc > MAX_ARGS) error("too many arguments"); |
101 | ||
102 | if (!*++argv) error("no script directory argument"); | |
103 | ev= getenv("HOME"); if (!ev) error("no HOME env. var"); | |
104 | l= strlen(*argv)+strlen(ev); | |
105 | newvar= xmalloc(l+2); | |
106 | sprintf(newvar,"%s/%s",ev,*argv); | |
107 | scriptdir= newvar; | |
108 | scriptdirlen= strlen(scriptdir); | |
109 | ||
f601a2c6 | 110 | filter_environment(0, "USERV_U_E_", envok, setenvar, 0); |
6a580c17 | 111 | |
112 | scriptpath= 0; | |
113 | pathi= getenv("PATH_INFO"); | |
114 | if (!pathi) error("PATH_INFO not found"); | |
115 | lastslash= pathi; | |
6a3086f1 MW |
116 | D( if (debugmode) { |
117 | printf(";; find script name...\n" | |
118 | ";; PATH_INFO = `%s'\n", | |
119 | pathi); | |
120 | } ) | |
6a580c17 | 121 | for (;;) { |
122 | if (*lastslash != '/') error("PATH_INFO expected slash not found"); | |
123 | if (lastslash[1]=='.' || lastslash[1]=='#' || !lastslash[1]) error("bad char begin"); | |
124 | nextslash= strchr(lastslash+1,'/'); | |
125 | if (!nextslash) nextslash= lastslash+1+strlen(lastslash+1); | |
126 | if (!nextslash) error("insufficient elements in PATH_INFO"); | |
127 | if (nextslash==lastslash+1) error("empty component in PATH_INFO"); | |
128 | if (nextslash-pathi > MAX_SCRIPTPATH_LEN) error("PATH_INFO script path too long"); | |
129 | scriptpathlen= scriptdirlen+(nextslash-pathi); | |
130 | scriptpath= xrealloc(scriptpath,scriptpathlen+1); | |
131 | strcpy(scriptpath,scriptdir); | |
132 | memcpy(scriptpath+scriptdirlen,pathi,nextslash-pathi); | |
133 | scriptpath[scriptpathlen]= 0; | |
134 | if (scriptpath[scriptpathlen-1]=='~') error("bad char end"); | |
6a3086f1 | 135 | D( if (debugmode) printf(";; try `%s'\n", scriptpath); ) |
6a580c17 | 136 | r= stat(scriptpath,&stab); if (r) syserror("stat script"); |
137 | if (S_ISREG(stab.st_mode)) break; | |
1ba0145f | 138 | if (!S_ISDIR(stab.st_mode)) error("script not directory or file"); |
6a580c17 | 139 | lastslash= nextslash; |
140 | } | |
6a3086f1 | 141 | D( if (debugmode) printf(";; found script: tail = `%s'\n", nextslash); ) |
6a580c17 | 142 | if (*nextslash) xsetenv("PATH_INFO",nextslash,1); |
143 | else unsetenv("PATH_INFO"); | |
144 | ||
145 | newvar= xmalloc(scriptpathlen+strlen(nextslash)+3); | |
146 | sprintf(newvar,"%s%s",scriptpath,nextslash); | |
147 | xsetenv("PATH_TRANSLATED",newvar,1); | |
148 | ||
149 | xsetenv("SCRIPT_FILENAME",scriptpath,1); | |
150 | ||
151 | ev= getenv("SCRIPT_NAME"); | |
152 | if (ev) { | |
153 | ev2= getenv("USER"); if (!ev2) error("no USER variable"); | |
154 | newvar= xmalloc(strlen(ev)+2+strlen(ev2)+scriptpathlen-scriptdirlen+2); | |
155 | sprintf(newvar,"%s/~%s%s",ev,ev2,scriptpath+scriptdirlen); | |
156 | xsetenv("SCRIPT_NAME",newvar,1); | |
157 | } | |
158 | ||
159 | arguments= xmalloc(sizeof(const char*)*(argc+5)); | |
160 | nargs= 0; | |
161 | ||
162 | arguments[nargs++]= scriptpath; | |
163 | while ((av= (*++argv))) arguments[nargs++]= av; | |
164 | arguments[nargs++]= 0; | |
165 | ||
6a3086f1 MW |
166 | D( if (debugmode) { |
167 | int i; | |
168 | ||
169 | printf(";; final environment...\n"); | |
170 | for (i = 0; environ[i]; i++) | |
171 | printf(";; %s\n", environ[i]); | |
172 | ||
173 | printf(";; final command line...\n"); | |
174 | for (i = 0; arguments[i]; i++) | |
175 | printf(";; %s\n", arguments[i]); | |
176 | fflush(stdout); | |
177 | } ) | |
178 | ||
6a580c17 | 179 | execvp(scriptpath,(char*const*)arguments); |
180 | syserror("exec script"); | |
181 | return -1; | |
182 | } |