Commit | Line | Data |
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6a580c17 | 1 | /* |
2 | * Usage: as CGI script | |
3 | */ | |
a33962ba | 4 | /* |
711a0748 | 5 | * Copyright (C) 1998-1999,2003 Ian Jackson |
a33962ba | 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 | */ | |
6a580c17 | 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 | ||
f7b4be5a | 33 | static const char *const default_envok[] = { |
a8e8db26 MW |
34 | "AUTH_TYPE", |
35 | "CONTENT_TYPE", | |
36 | "CONTENT_LENGTH", | |
37 | "DOCUMENT_ROOT", | |
38 | "GATEWAY_INTERFACE", | |
39 | "HTTP_*", | |
40 | "HTTPS", | |
41 | "PATH_INFO", | |
42 | "PATH_TRANSLATED", | |
43 | "QUERY_STRING", | |
44 | "REMOTE_*", | |
45 | "REQUEST_METHOD", | |
46 | "REQUEST_URI", | |
47 | "SCRIPT_*", | |
48 | "SERVER_*", | |
49 | 0 | |
50 | }; | |
51 | ||
77a36cae MW |
52 | struct buildargs { |
53 | const char **v; | |
54 | int n, max; | |
55 | }; | |
56 | ||
57 | static void addarg(struct buildargs *args, const char *a) { | |
58 | if (args->n > args->max) error("too many arguments"); | |
59 | args->v[args->n++]= a; | |
60 | } | |
61 | ||
f601a2c6 MW |
62 | static void add_userv_var(const char *fulln, |
63 | const char *en, const char *ev, void *p) { | |
64 | struct buildargs *args= p; | |
77a36cae MW |
65 | size_t l; |
66 | char *a; | |
67 | ||
68 | l= strlen(ev); if (l > MAX_ENVVAR_VALUE) error("environment variable too long"); | |
69 | a= xmalloc(strlen(en)+l+6); | |
70 | sprintf(a,"-DE_%s=%s",en,ev); | |
71 | addarg(args, a); | |
72 | } | |
73 | ||
6a580c17 | 74 | int main(int argc, const char **argv) { |
77a36cae | 75 | char *username; |
f7b4be5a MW |
76 | const char *slash2, *pathi, *ev, *av; |
77 | const char *const *envok; | |
6a580c17 | 78 | size_t usernamelen, l; |
77a36cae | 79 | struct buildargs args; |
6a580c17 | 80 | pid_t child, rchild; |
77a36cae | 81 | int status; |
6a580c17 | 82 | |
83 | l= strlen(argv[0]); | |
84 | if (l>6 && !strcmp(argv[0]+l-6,"-debug")) debugmode= 1; | |
85 | ||
86 | if (debugmode) { | |
87 | if (fputs("Content-Type: text/plain\n\n",stdout)==EOF || fflush(stdout)) | |
88 | syserror("write stdout"); | |
89 | if (dup2(1,2)<0) { perror("dup stdout to stderr"); exit(-1); } | |
6a3086f1 | 90 | D( printf(";;; UCGI\n"); ) |
6a580c17 | 91 | } |
92 | ||
93 | if (argc > MAX_ARGS) error("too many arguments"); | |
94 | ||
f7b4be5a MW |
95 | ev= getenv("UCGI_ENV_FILTER"); |
96 | if (ev) | |
97 | envok= load_filters(LOADF_MUST, ev, LF_END); | |
98 | else { | |
99 | envok= load_filters(0, "/etc/userv/ucgi.env-filter", LF_END); | |
100 | if (!envok) envok= default_envok; | |
101 | } | |
102 | ||
6a580c17 | 103 | pathi= getenv("PATH_INFO"); |
104 | if (!pathi) error("PATH_INFO not found"); | |
6a3086f1 MW |
105 | D( if (debugmode) { |
106 | printf(";; find user name...\n" | |
107 | ";; initial PATH_INFO = `%s'\n", | |
108 | pathi); | |
109 | } ) | |
6a580c17 | 110 | if (pathi[0] != '/' || pathi[1] != '~') error("PATH_INFO must start with /~"); |
111 | slash2= strchr(pathi+2,'/'); if (!slash2) error("PATH_INFO must have more than one /"); | |
112 | usernamelen= slash2-(pathi+2); | |
113 | if (usernamelen > MAX_USERNAME_LEN) error("PATH_INFO username too long"); | |
114 | username= xmalloc(usernamelen+1); | |
115 | memcpy(username,pathi+2,usernamelen); username[usernamelen]= 0; | |
6a3086f1 MW |
116 | D( if (debugmode) |
117 | printf(";; user = `%s'; tail = `%s'\n", username, slash2); ) | |
6a580c17 | 118 | if (!isalpha(username[0])) error("username 1st character is not alphabetic"); |
119 | xsetenv("PATH_INFO",slash2,1); | |
77a36cae | 120 | |
f601a2c6 | 121 | args.n= 0; args.max= argc + MAX_ENVVARS + 10; |
77a36cae | 122 | args.v= xmalloc(args.max * sizeof(*args.v)); |
6a580c17 | 123 | |
77a36cae MW |
124 | addarg(&args, "userv"); |
125 | if (debugmode) addarg(&args, "-DDEBUG=1"); | |
126 | ||
f601a2c6 | 127 | filter_environment(FILTF_WILDCARD, "", envok, add_userv_var, &args); |
6a580c17 | 128 | |
77a36cae MW |
129 | addarg(&args, username); |
130 | addarg(&args, "www-cgi"); | |
131 | while ((av= (*++argv))) addarg(&args, av); | |
132 | addarg(&args, 0); | |
6a580c17 | 133 | |
134 | if (debugmode) { | |
6a3086f1 | 135 | D( fflush(stdout); ) |
6a580c17 | 136 | child= fork(); if (child==-1) syserror("fork"); |
137 | if (child) { | |
138 | rchild= waitpid(child,&status,0); | |
139 | if (rchild==-1) syserror("waitpid"); | |
140 | printf("\nexit status %d %d\n",(status>>8)&0x0ff,status&0x0ff); | |
141 | exit(0); | |
142 | } | |
143 | } | |
144 | ||
6a3086f1 MW |
145 | D( if (debugmode) { |
146 | int i; | |
147 | ||
148 | printf(";; final command line...\n"); | |
77a36cae MW |
149 | for (i = 0; args.v[i]; i++) |
150 | printf(";; %s\n", args.v[i]); | |
6a3086f1 MW |
151 | fflush(stdout); |
152 | } ) | |
153 | ||
77a36cae | 154 | execvp("userv",(char*const*)args.v); |
6a580c17 | 155 | syserror("exec userv"); |
156 | return -1; | |
157 | } |