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/*
* Usage: as CGI script
*/
/*
* Copyright 1996-2013 Ian Jackson <ijackson@chiark.greenend.org.uk>
* Copyright 1998 David Damerell <damerell@chiark.greenend.org.uk>
* Copyright 1999,2003
* Chancellor Masters and Scholars of the University of Cambridge
* Copyright 2010 Tony Finch <fanf@dotat.at>
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with userv-utils; if not, see http://www.gnu.org/licenses/.
*/
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#include "ucgi.h"
int main(int argc, const char **argv) {
char *defarg, *username;
const char *slash2, *pathi, *ev, *en, *av;
const char *const *ep;
const char **arguments;
size_t usernamelen, l;
pid_t child, rchild;
int nargs, status;
l= strlen(argv[0]);
if (l>6 && !strcmp(argv[0]+l-6,"-debug")) debugmode= 1;
if (debugmode) {
if (fputs("Content-Type: text/plain\n\n",stdout)==EOF || fflush(stdout))
syserror("write stdout");
if (dup2(1,2)<0) { perror("dup stdout to stderr"); exit(-1); }
}
if (argc > MAX_ARGS) error("too many arguments");
pathi= getenv("PATH_INFO");
if (!pathi) error("PATH_INFO not found");
if (pathi[0] != '/' || pathi[1] != '~') error("PATH_INFO must start with /~");
slash2= strchr(pathi+2,'/'); if (!slash2) error("PATH_INFO must have more than one /");
usernamelen= slash2-(pathi+2);
if (usernamelen > MAX_USERNAME_LEN) error("PATH_INFO username too long");
username= xmalloc(usernamelen+1);
memcpy(username,pathi+2,usernamelen); username[usernamelen]= 0;
if (!isalpha(username[0])) error("username 1st character is not alphabetic");
xsetenv("PATH_INFO",slash2,1);
arguments= xmalloc(sizeof(const char*)*(nenvok+argc+10));
nargs= 0;
arguments[nargs++]= "userv";
if (debugmode) arguments[nargs++]= "-DDEBUG=1";
for (ep= envok; (en= *ep); ep++) {
ev= getenv(en); if (!ev) continue;
l= strlen(ev); if (l > MAX_ENVVAR_VALUE) error("environment variable too long");
defarg= xmalloc(strlen(en)+l+6);
sprintf(defarg,"-DE_%s=%s",en,ev);
arguments[nargs++]= defarg;
}
arguments[nargs++]= username;
arguments[nargs++]= "www-cgi";
while ((av= (*++argv))) arguments[nargs++]= av;
arguments[nargs++]= 0;
if (debugmode) {
child= fork(); if (child==-1) syserror("fork");
if (child) {
rchild= waitpid(child,&status,0);
if (rchild==-1) syserror("waitpid");
printf("\nexit status %d %d\n",(status>>8)&0x0ff,status&0x0ff);
exit(0);
}
}
execvp("userv",(char*const*)arguments);
syserror("exec userv");
return -1;
}
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