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

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

diff --git a/www-cgi/ucgi.c b/www-cgi/ucgi.c
new file mode 100644 (file)
index 0000000..8edccc3
--- /dev/null
+++ b/www-cgi/ucgi.c
@@ -0,0 +1,77 @@
+/*
+ * Usage: as CGI script
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
+#include "ucgi.h"
+
+int main(int argc, const char **argv) {
+  char *defarg, *username;
+  const char *slash2, *pathi, *ev, *en, *av;
+  const char *const *ep;
+  const char **arguments;
+  size_t usernamelen, l;
+  pid_t child, rchild;
+  int nargs, status;
+
+  l= strlen(argv[0]);
+  if (l>6 && !strcmp(argv[0]+l-6,"-debug")) debugmode= 1;
+
+  if (debugmode) {
+    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); }
+  }
+  
+  if (argc > MAX_ARGS) error("too many arguments");
+
+  pathi= getenv("PATH_INFO");
+  if (!pathi) error("PATH_INFO not found");
+  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;
+  if (!isalpha(username[0])) error("username 1st character is not alphabetic");
+  xsetenv("PATH_INFO",slash2,1);
+  
+  arguments= xmalloc(sizeof(const char*)*(nenvok+argc+10));
+  nargs= 0;
+  
+  arguments[nargs++]= "userv";
+  if (debugmode) arguments[nargs++]= "-DDEBUG=1";
+  
+  for (ep= envok; (en= *ep); ep++) {
+    ev= getenv(en); if (!ev) continue;
+    l= strlen(ev); if (l > MAX_ENVVAR_VALUE) error("environment variable too long");
+    defarg= xmalloc(strlen(en)+l+6);
+    sprintf(defarg,"-DE_%s=%s",en,ev);
+    arguments[nargs++]= defarg;
+  }
+
+  arguments[nargs++]= username;
+  arguments[nargs++]= "www-cgi";
+  while ((av= (*++argv))) arguments[nargs++]= av;
+  arguments[nargs++]= 0;
+
+  if (debugmode) {
+    child= fork(); if (child==-1) syserror("fork");
+    if (child) {
+      rchild= waitpid(child,&status,0);
+      if (rchild==-1) syserror("waitpid");
+      printf("\nexit status %d %d\n",(status>>8)&0x0ff,status&0x0ff);
+      exit(0);
+    }
+  }
+      
+  execvp("userv",(char*const*)arguments);
+  syserror("exec userv");
+  return -1;
+}