Client - Documentation for `enumitems` (commented out)

[tpg/opendispense2.git] / src / server / handler_door.c

diff --git a/src/server/handler_door.c b/src/server/handler_door.c
index 1ffcc85..cc66945 100644 (file)
--- a/src/server/handler_door.c
+++ b/src/server/handler_door.c
@@ -7,12 +7,21 @@
  * This file is licenced under the 3-clause BSD Licence. See the file
  * COPYING for full details.
  */
+#define        DEBUG   1
+#define        USE_POPEN       0
+
 #include "common.h"
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 #include <sys/stat.h>
 #include <fcntl.h>
+#include <signal.h>
+#include <unistd.h>
+#include <sys/wait.h>
+#include <pty.h>
+
+#define DOOR_UNLOCKED_DELAY    5       // Time in seconds before the door re-locks
 
 // === IMPORTS ===
 
@@ -28,17 +37,20 @@ tHandler    gDoor_Handler = {
        Door_CanDispense,
        Door_DoDispense
 };
-//char *gsDoor_SerialPort = "/dev/ttyS0";
-// int giDoor_SerialFD;
+char   *gsDoor_Password = "";
+volatile int   giDoor_ChildStatus;
 
 // == CODE ===
-int Door_InitHandler()
+void Door_SIGCHLDHandler(int signum)
 {
-//     printf("connecting to door...\n");
-//     giDoor_SerialFD = open(gsDoor_SerialPort, O_RDWR);
-//     if( giDoor_SerialFD == -1 ) {
-//             fprintf(stderr, "ERROR: Unable to open coke serial port ('%s')\n", gsDoor_SerialPort);
-//     }
+       signum = 0;
+       giDoor_ChildStatus ++;
+       printf("SIGCHLD: giDoor_ChildStatus = %i \n", giDoor_ChildStatus);
+}
+
+int Door_InitHandler(void)
+{
+       signal(SIGCHLD, Door_SIGCHLDHandler);
        return 0;
 }
 
@@ -46,8 +58,23 @@ int Door_InitHandler()
  */
 int Door_CanDispense(int User, int Item)
 {
+       #if DEBUG
+       printf("Door_CanDispense: (User=%i,Item=%i)\n", User, Item);
+       #endif
        // Sanity please
-       if( Item == 0 ) return -1;
+       if( Item != 0 ) return -1;
+       
+       if( !(Bank_GetFlags(User) & USER_FLAG_DOORGROUP) )
+       {
+               #if DEBUG
+               printf("Door_CanDispense: User %i not in door\n", User);
+               #endif
+               return 1;
+       }
+       
+       #if DEBUG
+       printf("Door_CanDispense: User %i can open the door\n", User);
+       #endif
        
        return 0;
 }
@@ -57,15 +84,121 @@ int Door_CanDispense(int User, int Item)
  */
 int Door_DoDispense(int User, int Item)
 {
-
+       FILE    *child_stdin;
+       #if 0
+        int    stdin_pair[2];
+        int    stdout_pair[2];
+       #else
+        int    child_stdin_fd;
+       #endif
+       pid_t   childPid;
+       pid_t   parentPid;
+       
+       #if DEBUG
+       printf("Door_DoDispense: (User=%i,Item=%i)\n", User, Item);
+       #endif
+       
        // Sanity please
        if( Item != 0 ) return -1;
        
        // Check if user is in door
+       if( !(Bank_GetFlags(User) & USER_FLAG_DOORGROUP) )
+       {
+               #if DEBUG
+               printf("Door_CanDispense: User %i not in door\n", User);
+               #endif
+               return 1;
+       }
+       
+       giDoor_ChildStatus = 0; // Set child status to zero
+       parentPid = getpid();
+       childPid = forkpty(&child_stdin_fd, NULL, NULL, NULL);
+       
+       if( childPid < 0 )
+       {
+               perror("fork");
+               return -1;
+       }
        
-       // llogin or other
+       // Child process
+       if( childPid == 0 )
+       {
+               execl("/usr/bin/llogin", "llogin", "door", "-w-", NULL);
+               perror("execl");
+               exit(-1);
+       }
+       
+       child_stdin = fdopen(child_stdin_fd, "w");
+
+       int read_child_output() 
+       {
+               char    buf[1024];
+                int    len;
+               if( giDoor_ChildStatus || (len = read(child_stdin_fd, buf, sizeof buf)) < 0)
+               {
+                       #if DEBUG
+                       printf("Door_DoDispense: fread fail\n");
+                       #endif
+                       return -1;
+               }
+               buf[len] = '\0';
+               
+               #if DEBUG > 1
+               printf("Door_DoDispense: buf = %i '%s'\n", len, buf);
+               #endif
+               return 0;
+       }
+
+       if( read_child_output() )       return -1;
+       
+       // Send password
+       if( giDoor_ChildStatus || fputs(gsDoor_Password, child_stdin) <= 0 ) {
+               printf("Door_DoDispense: fputs password fail\n");
+               return -1;
+       }
+       fputs("\n", child_stdin);
+       fflush(child_stdin);
+       
+       if( read_child_output() )       return -1;
+       
+       #if DEBUG
+       printf("Door_DoDispense: Door unlock\n");
+       #endif
+       // ATH1 - Unlock door
+       if( giDoor_ChildStatus || fputs("ATH1\n", child_stdin) == 0) {
+               #if DEBUG
+               printf("Door_DoDispense: fputs unlock failed (or child terminated)\n");
+               #endif
+               return -1;
+       }
+       fflush(child_stdin);
+       
+       // Wait before re-locking
+       sleep(DOOR_UNLOCKED_DELAY);
+
+       #if DEBUG
+       printf("Door_DoDispense: Door re-lock\n");
+       #endif
+       // Re-lock the door (and quit llogin)
+       if( giDoor_ChildStatus || fputs("ATH0\n", child_stdin) == 0 ) {
+               fprintf(stderr, "Oh F**k, the door may be stuck unlocked, someone use llogin!\n");
+               return -1;
+       }
+       fflush(child_stdin);
+       fputs("\x1D", child_stdin);
+
+       // Wait a little so llogin can send the lock message
+       sleep(1);
+       
+       fclose(child_stdin);
+       close(child_stdin_fd);
+       
+       #if DEBUG
+       printf("Door_DoDispense: User %i opened door\n", User);
+       #endif
+
+       kill(childPid, SIGKILL);
 
        return 0;
 }
 
-