-/*
- * Usage: as CGI script, but called by userv
- * environment variables are USERV_U_E_...
- */
-
-#include <stdio.h>
-#include <string.h>
-#include <ctype.h>
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <stat.h>
-
-#include "ucgi.h"
-
-void *xrealloc(void *ptr, size_t sz) {
- void *r;
-
- r= realloc(ptr,sz);
- if (!r) syserror("realloc failed");
- return r;
-}
-
-int main(int argc, const char **argv) {
- char *uservar, *scriptpath;
- const char *nextslash, *lastslash, *pathi, *ev, *en, *scriptdir;
- const char *const *ep;
- const char **arguments;
- size_t scriptdirlen, scriptpathlen, l, uservarnl;
- struct stat stab;
-
- ev= getenv("USERV_U_DEBUG");
- if (ev && *ev) debugmode= 1;
-
- if (argc > MAX_ARGS) error("too many arguments");
-
- scriptdir= *++argv;
- if (!scriptdir) error("no argv[1] (script directory)");
- scriptdirlen= strlen(scriptdir);
-
- for (ep= envok; (en= *ep); ep++) {
- l= strlen(en)+11;
- if (uservarnl<l) { uservarn= xrealloc(uservarn,l); uservarnl= l; }
- sprintf(uservarn,"USERV_U_E_%s",en);
- ev= getenv(uservarn); if (!ev) continue;
- if (strlen(ev) > MAX_ENVVAR_VALUE) error("environment variable too long");
- if (setenv(en,ev,1)) syserror("setenv");
- if (unsetenv(uservarn)) syserror("unsetenv");
- }
-
- pathi= getenv("PATH_INFO");
- if (!pathi) error("PATH_INFO not found");
- if (pathi[0] != '/') error("PATH_INFO must start with /");
- lastslash= pathi;
- for (;;) {
- nextslash= strchr(lastslash+1,'/');
- if (!nextslash) error("insufficient slashes in PATH_INFO beyond directory");
- if (nextslash[1]=='.' || nextslash[1]=='#' || !nextslash[1]) error("bad char begin");
- if (nextslash-pathi > MAX_SCRIPTPATH_LEN) error("PATH_INFO script dir too long");
- scriptpathlen= scriptdirlen+(nextslash-pathi);
- scriptpath= xrealloc(scriptpath,scriptpathlen);
- memcpy(scriptpath,pathi,scriptpathlen); scriptpath[scriptpathlen]= 0;
- if (scriptpath[scriptpathlen-1]=='~') error("bad char end");
- r= stat(scriptpath,&stab); if (r) syserror("stat script");
- if (S_ISREG(stab.st_mode)) break;
- if (!S_ISDIR(stab.st_mode)) syserror("script not directory or file");
- lastlash= nextslash;
- }
- if (setenv("PATH_INFO",nextslash,1)) syserror("setenv PATH_INFO");
-
- arguments= xmalloc(sizeof(const char*)*(argc+5));
- nargs= 0;
-
- arguments[nargs++]= scriptpath;
- while ((av= (*++argv))) arguments[nargs++]= av;
- arguments[nargs++]= 0;
-
- execvp(scriptpath,(char*const*)arguments);
- syserror("exec script");
- return -1;
-}