#include <sys/stat.h>
#include <fcntl.h>
#include <signal.h>
-#if !USE_POPEN
-# include <unistd.h>
-#endif
+#include <unistd.h>
+#include <sys/wait.h>
+#include <pty.h>
-#define DOOR_UNLOCKED_DELAY 10 // 10 seconds before it re-locks
+#define DOOR_UNLOCKED_DELAY 5 // Time in seconds before the door re-locks
// === IMPORTS ===
Door_DoDispense
};
char *gsDoor_Password = "";
+volatile int giDoor_ChildStatus;
// == CODE ===
+void Door_SIGCHLDHandler(int signum)
+{
+ signum = 0;
+ giDoor_ChildStatus ++;
+ printf("SIGCHLD: giDoor_ChildStatus = %i \n", giDoor_ChildStatus);
+}
+
int Door_InitHandler(void)
-{
+{
+ signal(SIGCHLD, Door_SIGCHLDHandler);
return 0;
}
int Door_DoDispense(int User, int Item)
{
FILE *child_stdin;
- char buf[512];
- #if !USE_POPEN
+ #if 0
int stdin_pair[2];
int stdout_pair[2];
- pid_t childPid;
+ #else
+ int child_stdin_fd;
#endif
+ pid_t childPid;
+ pid_t parentPid;
#if DEBUG
printf("Door_DoDispense: (User=%i,Item=%i)\n", User, Item);
return 1;
}
- #if !USE_POPEN
- // Create stdin/stdout
- if( pipe(stdin_pair) || pipe(stdout_pair) )
- {
- perror("pipe");
- return -1;
- }
-
- childPid = fork();
+ giDoor_ChildStatus = 0; // Set child status to zero
+ parentPid = getpid();
+ childPid = forkpty(&child_stdin_fd, NULL, NULL, NULL);
if( childPid < 0 )
{
// Child process
if( childPid == 0 )
{
- // Close write end of stdin, and set it to #0
- close(stdin_pair[1]); dup2(stdin_pair[0], 0);
- // Close read end of stdout, and set it to #1
- close(stdout_pair[0]); dup2(stdout_pair[1], 1);
-
- execl("/bin/sh", "sh", "-c", "llogin door -w-", NULL);
+ execl("/usr/bin/llogin", "llogin", "door", "-w-", NULL);
perror("execl");
exit(-1);
}
- child_stdin = fdopen(stdin_pair[1], "w");
- close(stdin_pair[0]); // child stdin read
- close(stdout_pair[1]); // child stdout write
-
- #else
- // llogin or other
- child_stdin = popen("llogin door -w -", "w");
- if( !child_stdin || child_stdin == (void*)-1 ) {
- #if DEBUG
- printf("Door_DoDispense: llogin failure\n");
- #endif
- return -1;
- }
- #endif
-
- if(fread(buf, 1, 512, child_stdin) == 0) {
- #if DEBUG
- printf("Door_DoDispense: fread fail\n");
+ 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 -1;
+ return 0;
}
+
+ if( read_child_output() ) return -1;
// Send password
- if( fputs(gsDoor_Password, child_stdin) <= 0 ) {
- #if DEBUG
- printf("Door_DoDispense: fputs password\n");
- #endif
+ 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( fputs("ATH1\n", child_stdin) <= 0) {
+ if( giDoor_ChildStatus || fputs("ATH1\n", child_stdin) == 0) {
#if DEBUG
- printf("Door_DoDispense: fputs unlock\n");
+ 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
- if( fputs("ATH0\n", child_stdin) <= 0 ) {
- #if DEBUG
- printf("Door_DoDispense: fputs 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);
- #if !USE_POPEN
fclose(child_stdin);
- close(stdin_pair[1]); // child stdin write
- close(stdout_pair[0]); // child stdout read
- #else
- pclose(child_stdin);
- #endif
+ close(child_stdin_fd);
#if DEBUG
printf("Door_DoDispense: User %i opened door\n", User);
#endif
+ kill(childPid, SIGKILL);
+
return 0;
}