Commit | Line | Data |
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6a580c17 | 1 | /* |
2 | * Usage: as CGI script, but called by userv | |
3 | * environment variables are USERV_U_E_... | |
4 | */ | |
a33962ba | 5 | /* |
711a0748 | 6 | * Copyright (C) 1998-1999,2003 Ian Jackson |
a33962ba | 7 | * |
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. | |
12 | * | |
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. | |
17 | * | |
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. | |
21 | * | |
22 | * $Id$ | |
23 | */ | |
6a580c17 | 24 | |
25 | #include <stdio.h> | |
26 | #include <string.h> | |
27 | #include <ctype.h> | |
28 | #include <unistd.h> | |
29 | #include <sys/types.h> | |
30 | #include <sys/wait.h> | |
31 | #include <sys/stat.h> | |
32 | ||
33 | #include "ucgi.h" | |
34 | ||
f601a2c6 MW |
35 | static void setenvar(const char *fulln, |
36 | const char *en, const char *ep, void *p) { | |
37 | xsetenv(en, ep, 1); | |
38 | unsetenv(fulln); | |
39 | } | |
40 | ||
6a580c17 | 41 | int main(int argc, const char **argv) { |
f601a2c6 MW |
42 | char *scriptpath, *newvar; |
43 | const char *nextslash, *lastslash, *pathi, *ev, *ev2, *scriptdir, *av; | |
6a580c17 | 44 | const char **arguments; |
f601a2c6 | 45 | size_t scriptdirlen, scriptpathlen, l; |
6a580c17 | 46 | struct stat stab; |
47 | int r, nargs; | |
48 | ||
49 | ev= getenv("USERV_U_DEBUG"); | |
50 | if (ev && *ev) debugmode= 1; | |
51 | ||
6a3086f1 | 52 | D( if (debugmode) printf(";;; UCGITARGET\n"); ) |
6a580c17 | 53 | if (argc > MAX_ARGS) error("too many arguments"); |
54 | ||
55 | if (!*++argv) error("no script directory argument"); | |
56 | ev= getenv("HOME"); if (!ev) error("no HOME env. var"); | |
57 | l= strlen(*argv)+strlen(ev); | |
58 | newvar= xmalloc(l+2); | |
59 | sprintf(newvar,"%s/%s",ev,*argv); | |
60 | scriptdir= newvar; | |
61 | scriptdirlen= strlen(scriptdir); | |
62 | ||
f601a2c6 | 63 | filter_environment(0, "USERV_U_E_", envok, setenvar, 0); |
6a580c17 | 64 | |
65 | scriptpath= 0; | |
66 | pathi= getenv("PATH_INFO"); | |
67 | if (!pathi) error("PATH_INFO not found"); | |
68 | lastslash= pathi; | |
6a3086f1 MW |
69 | D( if (debugmode) { |
70 | printf(";; find script name...\n" | |
71 | ";; PATH_INFO = `%s'\n", | |
72 | pathi); | |
73 | } ) | |
6a580c17 | 74 | for (;;) { |
75 | if (*lastslash != '/') error("PATH_INFO expected slash not found"); | |
76 | if (lastslash[1]=='.' || lastslash[1]=='#' || !lastslash[1]) error("bad char begin"); | |
77 | nextslash= strchr(lastslash+1,'/'); | |
78 | if (!nextslash) nextslash= lastslash+1+strlen(lastslash+1); | |
79 | if (!nextslash) error("insufficient elements in PATH_INFO"); | |
80 | if (nextslash==lastslash+1) error("empty component in PATH_INFO"); | |
81 | if (nextslash-pathi > MAX_SCRIPTPATH_LEN) error("PATH_INFO script path too long"); | |
82 | scriptpathlen= scriptdirlen+(nextslash-pathi); | |
83 | scriptpath= xrealloc(scriptpath,scriptpathlen+1); | |
84 | strcpy(scriptpath,scriptdir); | |
85 | memcpy(scriptpath+scriptdirlen,pathi,nextslash-pathi); | |
86 | scriptpath[scriptpathlen]= 0; | |
87 | if (scriptpath[scriptpathlen-1]=='~') error("bad char end"); | |
6a3086f1 | 88 | D( if (debugmode) printf(";; try `%s'\n", scriptpath); ) |
6a580c17 | 89 | r= stat(scriptpath,&stab); if (r) syserror("stat script"); |
90 | if (S_ISREG(stab.st_mode)) break; | |
1ba0145f | 91 | if (!S_ISDIR(stab.st_mode)) error("script not directory or file"); |
6a580c17 | 92 | lastslash= nextslash; |
93 | } | |
6a3086f1 | 94 | D( if (debugmode) printf(";; found script: tail = `%s'\n", nextslash); ) |
6a580c17 | 95 | if (*nextslash) xsetenv("PATH_INFO",nextslash,1); |
96 | else unsetenv("PATH_INFO"); | |
97 | ||
98 | newvar= xmalloc(scriptpathlen+strlen(nextslash)+3); | |
99 | sprintf(newvar,"%s%s",scriptpath,nextslash); | |
100 | xsetenv("PATH_TRANSLATED",newvar,1); | |
101 | ||
102 | xsetenv("SCRIPT_FILENAME",scriptpath,1); | |
103 | ||
104 | ev= getenv("SCRIPT_NAME"); | |
105 | if (ev) { | |
106 | ev2= getenv("USER"); if (!ev2) error("no USER variable"); | |
107 | newvar= xmalloc(strlen(ev)+2+strlen(ev2)+scriptpathlen-scriptdirlen+2); | |
108 | sprintf(newvar,"%s/~%s%s",ev,ev2,scriptpath+scriptdirlen); | |
109 | xsetenv("SCRIPT_NAME",newvar,1); | |
110 | } | |
111 | ||
112 | arguments= xmalloc(sizeof(const char*)*(argc+5)); | |
113 | nargs= 0; | |
114 | ||
115 | arguments[nargs++]= scriptpath; | |
116 | while ((av= (*++argv))) arguments[nargs++]= av; | |
117 | arguments[nargs++]= 0; | |
118 | ||
6a3086f1 MW |
119 | D( if (debugmode) { |
120 | int i; | |
121 | ||
122 | printf(";; final environment...\n"); | |
123 | for (i = 0; environ[i]; i++) | |
124 | printf(";; %s\n", environ[i]); | |
125 | ||
126 | printf(";; final command line...\n"); | |
127 | for (i = 0; arguments[i]; i++) | |
128 | printf(";; %s\n", arguments[i]); | |
129 | fflush(stdout); | |
130 | } ) | |
131 | ||
6a580c17 | 132 | execvp(scriptpath,(char*const*)arguments); |
133 | syserror("exec script"); | |
134 | return -1; | |
135 | } |