2 * Usage: as CGI script, but called by userv
3 * environment variables are USERV_U_E_...
6 * Copyright (C) 1998-1999,2003 Ian Jackson
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.
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.
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.
30 #include <sys/types.h>
36 static const char *const default_envok
[]= {
43 "HTTP_ACCEPT_CHARSET",
44 "HTTP_ACCEPT_ENCODING",
45 "HTTP_ACCEPT_LANGUAGE",
48 "HTTP_CONTENT_ENCODING",
58 "HTTP_X_FORWARDED_FOR",
64 "REDIRECT_SCRIPT_URI",
65 "REDIRECT_SCRIPT_URL",
92 static void setenvar(const char *fulln
,
93 const char *en
, const char *ep
, void *p
) {
98 int main(int argc
, char **argv
) {
99 char *scriptpath
, *newvar
;
100 const char *nextslash
, *lastslash
, *pathi
, *ev
, *ev2
, *scriptdir
, *av
;
101 const char *const *envok
;
102 const char **arguments
;
103 size_t scriptdirlen
, scriptpathlen
, l
;
106 const char *filters
= 0;
108 ev
= getenv("USERV_U_DEBUG");
109 if (ev
&& *ev
) debugmode
= 1;
111 D( if (debugmode
) printf(";;; UCGITARGET\n"); )
112 if (argc
> MAX_ARGS
) error("too many arguments", 500);
115 i
= getopt(argc
, argv
, "+e:"); if (i
< 0) break;
117 case 'e': filters
= optarg
; break;
118 default: error("bad command line", 500); break;
121 argc
-= optind
; argv
+= optind
;
123 if (!*argv
) error("no script directory argument", 500);
124 ev
= getenv("HOME"); if (!ev
) error("no HOME env. var", 500);
125 l
= strlen(*argv
)+strlen(ev
);
126 newvar
= xmalloc(l
+2);
127 sprintf(newvar
,"%s/%s",ev
,*argv
);
129 scriptdirlen
= strlen(scriptdir
);
132 envok
= load_filters(LOADF_MUST
, filters
, LF_END
);
134 envok
= load_filters(0,
135 ".userv/ucgitarget.env-filter",
136 "/etc/userv/ucgitarget.env-filter",
140 filter_environment(0, "USERV_U_E_", envok
, default_envok
, setenvar
, 0);
143 pathi
= getenv("PATH_INFO");
144 if (!pathi
) error("PATH_INFO not found", 500);
147 printf(";; find script name...\n"
148 ";; PATH_INFO = `%s'\n",
152 if (*lastslash
!= '/') error("PATH_INFO expected slash not found", 400);
153 if (lastslash
[1]=='.' || lastslash
[1]=='#' || !lastslash
[1])
154 error("bad char begin", 400);
155 nextslash
= strchr(lastslash
+1,'/');
156 if (!nextslash
) nextslash
= lastslash
+1+strlen(lastslash
+1);
157 if (!nextslash
) error("insufficient elements in PATH_INFO", 400);
158 if (nextslash
==lastslash
+1) error("empty component in PATH_INFO", 400);
159 if (nextslash
-pathi
> MAX_SCRIPTPATH_LEN
)
160 error("PATH_INFO script path too long", 400);
161 scriptpathlen
= scriptdirlen
+(nextslash
-pathi
);
162 scriptpath
= xrealloc(scriptpath
,scriptpathlen
+1);
163 strcpy(scriptpath
,scriptdir
);
164 memcpy(scriptpath
+scriptdirlen
,pathi
,nextslash
-pathi
);
165 scriptpath
[scriptpathlen
]= 0;
166 if (scriptpath
[scriptpathlen
-1]=='~') error("bad char end", 400);
167 D( if (debugmode
) printf(";; try `%s'\n", scriptpath
); )
168 r
= stat(scriptpath
,&stab
); if (r
) syserror("stat script");
169 if (S_ISREG(stab
.st_mode
)) break;
170 if (!S_ISDIR(stab
.st_mode
)) error("script not directory or file", 500);
171 lastslash
= nextslash
;
173 D( if (debugmode
) printf(";; found script: tail = `%s'\n", nextslash
); )
174 if (*nextslash
) xsetenv("PATH_INFO",nextslash
,1);
175 else unsetenv("PATH_INFO");
177 newvar
= xmalloc(scriptpathlen
+strlen(nextslash
)+3);
178 sprintf(newvar
,"%s%s",scriptpath
,nextslash
);
179 xsetenv("PATH_TRANSLATED",newvar
,1);
181 xsetenv("SCRIPT_FILENAME",scriptpath
,1);
183 ev
= getenv("SCRIPT_NAME");
185 ev2
= getenv("USER"); if (!ev2
) error("no USER variable", 500);
186 newvar
= xmalloc(strlen(ev
)+2+strlen(ev2
)+scriptpathlen
-scriptdirlen
+2);
187 sprintf(newvar
,"%s/~%s%s",ev
,ev2
,scriptpath
+scriptdirlen
);
188 xsetenv("SCRIPT_NAME",newvar
,1);
191 arguments
= xmalloc(sizeof(const char*)*(argc
+5));
194 arguments
[nargs
++]= scriptpath
;
195 while ((av
= (*++argv
))) arguments
[nargs
++]= av
;
196 arguments
[nargs
++]= 0;
201 printf(";; final environment...\n");
202 for (i
= 0; environ
[i
]; i
++)
203 printf(";; %s\n", environ
[i
]);
205 printf(";; final command line...\n");
206 for (i
= 0; arguments
[i
]; i
++)
207 printf(";; %s\n", arguments
[i
]);
211 execvp(scriptpath
,(char*const*)arguments
);
212 syserror("exec script");