www-cgi/: Add some trivial tracing.

[userv-utils.git] / www-cgi / ucgi.c

diff --git a/www-cgi/ucgi.c b/www-cgi/ucgi.c
index c1239d07f90b24b14f2c139d52a713e5eaa552b1..374fea5c0f1f03eef014f12f2ca649337ba23506 100644 (file)
--- a/www-cgi/ucgi.c
+++ b/www-cgi/ucgi.c
@@ -46,18 +46,26 @@ int main(int argc, const char **argv) {
     if (fputs("Content-Type: text/plain\n\n",stdout)==EOF || fflush(stdout))
       syserror("write stdout");
     if (dup2(1,2)<0) { perror("dup stdout to stderr"); exit(-1); }
+    D( printf(";;; UCGI\n"); )
   }
   
   if (argc > MAX_ARGS) error("too many arguments");
 
   pathi= getenv("PATH_INFO");
   if (!pathi) error("PATH_INFO not found");
+  D( if (debugmode) {
+       printf(";; find user name...\n"
+             ";;   initial PATH_INFO = `%s'\n",
+             pathi);
+  } )
   if (pathi[0] != '/' || pathi[1] != '~') error("PATH_INFO must start with /~");
   slash2= strchr(pathi+2,'/'); if (!slash2) error("PATH_INFO must have more than one /");
   usernamelen= slash2-(pathi+2);
   if (usernamelen > MAX_USERNAME_LEN) error("PATH_INFO username too long");
   username= xmalloc(usernamelen+1);
   memcpy(username,pathi+2,usernamelen); username[usernamelen]= 0;
+  D( if (debugmode)
+       printf(";;   user = `%s'; tail = `%s'\n", username, slash2); )
   if (!isalpha(username[0])) error("username 1st character is not alphabetic");
   xsetenv("PATH_INFO",slash2,1);
   
@@ -81,6 +89,7 @@ int main(int argc, const char **argv) {
   arguments[nargs++]= 0;
 
   if (debugmode) {
+    D( fflush(stdout); )
     child= fork(); if (child==-1) syserror("fork");
     if (child) {
       rchild= waitpid(child,&status,0);
@@ -90,6 +99,15 @@ int main(int argc, const char **argv) {
     }
   }
       
+  D( if (debugmode) {
+       int i;
+
+       printf(";; final command line...\n");
+       for (i = 0; arguments[i]; i++)
+        printf(";;   %s\n", arguments[i]);
+       fflush(stdout);
+  } )
+
   execvp("userv",(char*const*)arguments);
   syserror("exec userv");
   return -1;