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");