| 1 | /* |
| 2 | * Usage: as CGI script |
| 3 | */ |
| 4 | /* |
| 5 | * Copyright (C) 1998-1999,2003 Ian Jackson |
| 6 | * |
| 7 | * This is free software; you can redistribute it and/or modify it |
| 8 | * under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, but |
| 13 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with userv-utils; if not, write to the Free Software |
| 19 | * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 20 | * |
| 21 | * $Id$ |
| 22 | */ |
| 23 | |
| 24 | #include <stdio.h> |
| 25 | #include <string.h> |
| 26 | #include <ctype.h> |
| 27 | #include <unistd.h> |
| 28 | #include <sys/types.h> |
| 29 | #include <sys/wait.h> |
| 30 | |
| 31 | #include "ucgi.h" |
| 32 | |
| 33 | int main(int argc, const char **argv) { |
| 34 | char *defarg, *username; |
| 35 | const char *slash2, *pathi, *ev, *en, *av; |
| 36 | const char *const *ep; |
| 37 | const char **arguments; |
| 38 | size_t usernamelen, l; |
| 39 | pid_t child, rchild; |
| 40 | int nargs, status; |
| 41 | |
| 42 | l= strlen(argv[0]); |
| 43 | if (l>6 && !strcmp(argv[0]+l-6,"-debug")) debugmode= 1; |
| 44 | |
| 45 | if (debugmode) { |
| 46 | if (fputs("Content-Type: text/plain\n\n",stdout)==EOF || fflush(stdout)) |
| 47 | syserror("write stdout"); |
| 48 | if (dup2(1,2)<0) { perror("dup stdout to stderr"); exit(-1); } |
| 49 | } |
| 50 | |
| 51 | if (argc > MAX_ARGS) error("too many arguments"); |
| 52 | |
| 53 | pathi= getenv("PATH_INFO"); |
| 54 | if (!pathi) error("PATH_INFO not found"); |
| 55 | if (pathi[0] != '/' || pathi[1] != '~') error("PATH_INFO must start with /~"); |
| 56 | slash2= strchr(pathi+2,'/'); if (!slash2) error("PATH_INFO must have more than one /"); |
| 57 | usernamelen= slash2-(pathi+2); |
| 58 | if (usernamelen > MAX_USERNAME_LEN) error("PATH_INFO username too long"); |
| 59 | username= xmalloc(usernamelen+1); |
| 60 | memcpy(username,pathi+2,usernamelen); username[usernamelen]= 0; |
| 61 | if (!isalpha(username[0])) error("username 1st character is not alphabetic"); |
| 62 | xsetenv("PATH_INFO",slash2,1); |
| 63 | |
| 64 | arguments= xmalloc(sizeof(const char*)*(nenvok+argc+10)); |
| 65 | nargs= 0; |
| 66 | |
| 67 | arguments[nargs++]= "userv"; |
| 68 | if (debugmode) arguments[nargs++]= "-DDEBUG=1"; |
| 69 | |
| 70 | for (ep= envok; (en= *ep); ep++) { |
| 71 | ev= getenv(en); if (!ev) continue; |
| 72 | l= strlen(ev); if (l > MAX_ENVVAR_VALUE) error("environment variable too long"); |
| 73 | defarg= xmalloc(strlen(en)+l+6); |
| 74 | sprintf(defarg,"-DE_%s=%s",en,ev); |
| 75 | arguments[nargs++]= defarg; |
| 76 | } |
| 77 | |
| 78 | arguments[nargs++]= username; |
| 79 | arguments[nargs++]= "www-cgi"; |
| 80 | while ((av= (*++argv))) arguments[nargs++]= av; |
| 81 | arguments[nargs++]= 0; |
| 82 | |
| 83 | if (debugmode) { |
| 84 | child= fork(); if (child==-1) syserror("fork"); |
| 85 | if (child) { |
| 86 | rchild= waitpid(child,&status,0); |
| 87 | if (rchild==-1) syserror("waitpid"); |
| 88 | printf("\nexit status %d %d\n",(status>>8)&0x0ff,status&0x0ff); |
| 89 | exit(0); |
| 90 | } |
| 91 | } |
| 92 | |
| 93 | execvp("userv",(char*const*)arguments); |
| 94 | syserror("exec userv"); |
| 95 | return -1; |
| 96 | } |