2 * Usage: as CGI script, but called by userv
3 * environment variables are USERV_U_E_...
10 #include <sys/types.h>
16 static void *xrealloc(void *ptr
, size_t sz
) {
20 if (!r
) syserror("realloc failed");
24 int main(int argc
, const char **argv
) {
25 char *uservarn
, *scriptpath
, *newvar
;
26 const char *nextslash
, *lastslash
, *pathi
, *ev
, *ev2
, *en
, *scriptdir
, *av
;
27 const char *const *ep
;
28 const char **arguments
;
29 size_t scriptdirlen
, scriptpathlen
, l
, uservarnl
;
33 ev
= getenv("USERV_U_DEBUG");
34 if (ev
&& *ev
) debugmode
= 1;
36 if (argc
> MAX_ARGS
) error("too many arguments");
38 if (!*++argv
) error("no script directory argument");
39 ev
= getenv("HOME"); if (!ev
) error("no HOME env. var");
40 l
= strlen(*argv
)+strlen(ev
);
42 sprintf(newvar
,"%s/%s",ev
,*argv
);
44 scriptdirlen
= strlen(scriptdir
);
48 for (ep
= envok
; (en
= *ep
); ep
++) {
50 if (uservarnl
<l
) { uservarn
= xrealloc(uservarn
,l
); uservarnl
= l
; }
51 sprintf(uservarn
,"USERV_U_E_%s",en
);
52 ev
= getenv(uservarn
); if (!ev
) continue;
53 if (strlen(ev
) > MAX_ENVVAR_VALUE
) error("environment variable too long");
54 if (setenv(en
,ev
,1)) syserror("setenv");
59 pathi
= getenv("PATH_INFO");
60 if (!pathi
) error("PATH_INFO not found");
63 if (*lastslash
!= '/') error("PATH_INFO expected slash not found");
64 if (lastslash
[1]=='.' || lastslash
[1]=='#' || !lastslash
[1]) error("bad char begin");
65 nextslash
= strchr(lastslash
+1,'/');
66 if (!nextslash
) nextslash
= lastslash
+1+strlen(lastslash
+1);
67 if (!nextslash
) error("insufficient elements in PATH_INFO");
68 if (nextslash
==lastslash
+1) error("empty component in PATH_INFO");
69 if (nextslash
-pathi
> MAX_SCRIPTPATH_LEN
) error("PATH_INFO script path too long");
70 scriptpathlen
= scriptdirlen
+(nextslash
-pathi
);
71 scriptpath
= xrealloc(scriptpath
,scriptpathlen
+1);
72 strcpy(scriptpath
,scriptdir
);
73 memcpy(scriptpath
+scriptdirlen
,pathi
,nextslash
-pathi
);
74 scriptpath
[scriptpathlen
]= 0;
75 if (scriptpath
[scriptpathlen
-1]=='~') error("bad char end");
76 r
= stat(scriptpath
,&stab
); if (r
) syserror("stat script");
77 if (S_ISREG(stab
.st_mode
)) break;
78 if (!S_ISDIR(stab
.st_mode
)) syserror("script not directory or file");
81 if (*nextslash
) xsetenv("PATH_INFO",nextslash
,1);
82 else unsetenv("PATH_INFO");
84 newvar
= xmalloc(scriptpathlen
+strlen(nextslash
)+3);
85 sprintf(newvar
,"%s%s",scriptpath
,nextslash
);
86 xsetenv("PATH_TRANSLATED",newvar
,1);
88 xsetenv("SCRIPT_FILENAME",scriptpath
,1);
90 ev
= getenv("SCRIPT_NAME");
92 ev2
= getenv("USER"); if (!ev2
) error("no USER variable");
93 newvar
= xmalloc(strlen(ev
)+2+strlen(ev2
)+scriptpathlen
-scriptdirlen
+2);
94 sprintf(newvar
,"%s/~%s%s",ev
,ev2
,scriptpath
+scriptdirlen
);
95 xsetenv("SCRIPT_NAME",newvar
,1);
98 arguments
= xmalloc(sizeof(const char*)*(argc
+5));
101 arguments
[nargs
++]= scriptpath
;
102 while ((av
= (*++argv
))) arguments
[nargs
++]= av
;
103 arguments
[nargs
++]= 0;
105 execvp(scriptpath
,(char*const*)arguments
);
106 syserror("exec script");