found in davenant:/usr/local/src/misc

[userv-utils.git] / www-cgi / ucgitarget.c~

diff --git a/www-cgi/ucgitarget.c~ b/www-cgi/ucgitarget.c~
new file mode 100644 (file)
index 0000000..5299b6a
--- /dev/null
+++ b/www-cgi/ucgitarget.c~
@@ -0,0 +1,81 @@
+/*
+ * Usage: as CGI script, but called by userv
+ * environment variables are USERV_U_E_...
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <stat.h>
+
+#include "ucgi.h"
+
+void *xrealloc(void *ptr, size_t sz) {
+  void *r;
+
+  r= realloc(ptr,sz);
+  if (!r) syserror("realloc failed");
+  return r;
+}
+
+int main(int argc, const char **argv) {
+  char *uservar, *scriptpath;
+  const char *nextslash, *lastslash, *pathi, *ev, *en, *scriptdir;
+  const char *const *ep;
+  const char **arguments;
+  size_t scriptdirlen, scriptpathlen, l, uservarnl;
+  struct stat stab;
+
+  ev= getenv("USERV_U_DEBUG");
+  if (ev && *ev) debugmode= 1;
+  
+  if (argc > MAX_ARGS) error("too many arguments");
+
+  scriptdir= *++argv;
+  if (!scriptdir) error("no argv[1] (script directory)");
+  scriptdirlen= strlen(scriptdir);
+
+  for (ep= envok; (en= *ep); ep++) {
+    l= strlen(en)+11;
+    if (uservarnl<l) { uservarn= xrealloc(uservarn,l); uservarnl= l; }
+    sprintf(uservarn,"USERV_U_E_%s",en);
+    ev= getenv(uservarn); if (!ev) continue;
+    if (strlen(ev) > MAX_ENVVAR_VALUE) error("environment variable too long");
+    if (setenv(en,ev,1)) syserror("setenv");
+    if (unsetenv(uservarn)) syserror("unsetenv");
+  }
+
+  pathi= getenv("PATH_INFO");
+  if (!pathi) error("PATH_INFO not found");
+  if (pathi[0] != '/') error("PATH_INFO must start with /");
+  lastslash= pathi;
+  for (;;) {
+    nextslash= strchr(lastslash+1,'/');
+    if (!nextslash) error("insufficient slashes in PATH_INFO beyond directory");
+    if (nextslash[1]=='.' || nextslash[1]=='#' || !nextslash[1]) error("bad char begin");
+    if (nextslash-pathi > MAX_SCRIPTPATH_LEN) error("PATH_INFO script dir too long");
+    scriptpathlen= scriptdirlen+(nextslash-pathi);
+    scriptpath= xrealloc(scriptpath,scriptpathlen);
+    memcpy(scriptpath,pathi,scriptpathlen); scriptpath[scriptpathlen]= 0;
+    if (scriptpath[scriptpathlen-1]=='~') error("bad char end");
+    r= stat(scriptpath,&stab); if (r) syserror("stat script");
+    if (S_ISREG(stab.st_mode)) break;
+    if (!S_ISDIR(stab.st_mode)) syserror("script not directory or file");
+    lastlash= nextslash;
+  }
+  if (setenv("PATH_INFO",nextslash,1)) syserror("setenv PATH_INFO");
+
+  arguments= xmalloc(sizeof(const char*)*(argc+5));
+  nargs= 0;
+  
+  arguments[nargs++]= scriptpath;
+  while ((av= (*++argv))) arguments[nargs++]= av;
+  arguments[nargs++]= 0;
+
+  execvp(scriptpath,(char*const*)arguments);
+  syserror("exec script");
+  return -1;
+}