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.
29 #include <sys/types.h>
35 static const char *const envok
[]= {
42 "HTTP_ACCEPT_CHARSET",
43 "HTTP_ACCEPT_ENCODING",
44 "HTTP_ACCEPT_LANGUAGE",
47 "HTTP_CONTENT_ENCODING",
57 "HTTP_X_FORWARDED_FOR",
82 static void setenvar(const char *fulln
,
83 const char *en
, const char *ep
, void *p
) {
88 int main(int argc
, const char **argv
) {
89 char *scriptpath
, *newvar
;
90 const char *nextslash
, *lastslash
, *pathi
, *ev
, *ev2
, *scriptdir
, *av
;
91 const char **arguments
;
92 size_t scriptdirlen
, scriptpathlen
, l
;
96 ev
= getenv("USERV_U_DEBUG");
97 if (ev
&& *ev
) debugmode
= 1;
99 D( if (debugmode
) printf(";;; UCGITARGET\n"); )
100 if (argc
> MAX_ARGS
) error("too many arguments");
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
);
108 scriptdirlen
= strlen(scriptdir
);
110 filter_environment(0, "USERV_U_E_", envok
, setenvar
, 0);
113 pathi
= getenv("PATH_INFO");
114 if (!pathi
) error("PATH_INFO not found");
117 printf(";; find script name...\n"
118 ";; PATH_INFO = `%s'\n",
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");
135 D( if (debugmode
) printf(";; try `%s'\n", scriptpath
); )
136 r
= stat(scriptpath
,&stab
); if (r
) syserror("stat script");
137 if (S_ISREG(stab
.st_mode
)) break;
138 if (!S_ISDIR(stab
.st_mode
)) error("script not directory or file");
139 lastslash
= nextslash
;
141 D( if (debugmode
) printf(";; found script: tail = `%s'\n", nextslash
); )
142 if (*nextslash
) xsetenv("PATH_INFO",nextslash
,1);
143 else unsetenv("PATH_INFO");
145 newvar
= xmalloc(scriptpathlen
+strlen(nextslash
)+3);
146 sprintf(newvar
,"%s%s",scriptpath
,nextslash
);
147 xsetenv("PATH_TRANSLATED",newvar
,1);
149 xsetenv("SCRIPT_FILENAME",scriptpath
,1);
151 ev
= getenv("SCRIPT_NAME");
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);
159 arguments
= xmalloc(sizeof(const char*)*(argc
+5));
162 arguments
[nargs
++]= scriptpath
;
163 while ((av
= (*++argv
))) arguments
[nargs
++]= av
;
164 arguments
[nargs
++]= 0;
169 printf(";; final environment...\n");
170 for (i
= 0; environ
[i
]; i
++)
171 printf(";; %s\n", environ
[i
]);
173 printf(";; final command line...\n");
174 for (i
= 0; arguments
[i
]; i
++)
175 printf(";; %s\n", arguments
[i
]);
179 execvp(scriptpath
,(char*const*)arguments
);
180 syserror("exec script");