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");