* 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>
-
-#define DEBUG 1
+#include <signal.h>
+#if !USE_POPEN
+# include <unistd.h>
+#endif
#define DOOR_UNLOCKED_DELAY 10 // 10 seconds before it re-locks
Door_DoDispense
};
char *gsDoor_Password = "";
-// int giDoor_SerialFD;
// == CODE ===
int Door_InitHandler(void)
*/
int Door_DoDispense(int User, int Item)
{
- FILE *pipe;
- char buf[512]; // Buffer flush location - the sewer :)
+ FILE *child_stdin;
+ char buf[512];
+ int stdin_pair[2];
+ int stdout_pair[2];
+ pid_t childPid;
#if DEBUG
printf("Door_DoDispense: (User=%i,Item=%i)\n", User, Item);
return 1;
}
- // llogin or other
- pipe = popen("llogin door -w -", "w");
- if( !pipe || pipe == (void*)-1 ) {
+ // Create stdin/stdout
+ if( pipe(stdin_pair) || pipe(stdout_pair) )
+ {
+ perror("pipe");
+ return -1;
+ }
+
+ childPid = fork();
+
+ if( childPid < 0 )
+ {
+ perror("fork");
+ return -1;
+ }
+
+ // 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);
+ 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
+
+ if(read(stdout_pair[1], buf, 512) < 0) {
#if DEBUG
- printf("Door_DoDispense: llogin failure\n");
+ printf("Door_DoDispense: fread fail\n");
#endif
return -1;
}
- if( fread(buf, 512, 1, pipe) == 0 ) return -1; // Flush!
// Send password
- fputs(gsDoor_Password, pipe);
- fputs("\n", pipe);
- if( fread(buf, 512, 1, pipe) == 0 ) return -1; // Flush!
+ if( fputs(gsDoor_Password, child_stdin) <= 0 ) {
+ #if DEBUG
+ printf("Door_DoDispense: fputs password\n");
+ #endif
+ return -1;
+ }
+ fputs("\n", child_stdin);
+
+
+ #if DEBUG
+ printf("Door_DoDispense: Door unlock\n");
+ #endif
// ATH1 - Unlock door
- fputs("ATH1\n", pipe);
- if( fread(buf, 512, 1, pipe) == 0 ) return -1; // Flush!
+ if( fputs("ATH1\n", child_stdin) <= 0) {
+ #if DEBUG
+ printf("Door_DoDispense: fputs unlock\n");
+ #endif
+ return -1;
+ }
// Wait before re-locking
sleep(DOOR_UNLOCKED_DELAY);
+
+ #if DEBUG
+ printf("Door_DoDispense: Door re-lock\n");
+ #endif
+
// Re-lock the door
- fputs("ATH0\n", pipe);
- if( fread(buf, 512, 1, pipe) == 0 ) return -1; // Flush!
+ if( fputs("ATH0\n", child_stdin) <= 0 ) {
+ #if DEBUG
+ printf("Door_DoDispense: fputs lock\n");
+ #endif
+ return -1;
+ }
- pclose(pipe);
+ fclose(child_stdin);
+ close(stdin_pair[1]); // child stdin write
+ close(stdout_pair[0]); // child stdout read
#if DEBUG
printf("Door_DoDispense: User %i opened door\n", User);
return 0;
}
-