小编mad*_*ddy的帖子

我试图在两个进程之间进行通信.我试图在一个进程中将数据(如姓名,电话号码,地址)保存到共享内存,并尝试通过其他进程打印该数据.

process1.c

#include <stdio.h>
#include <sys/shm.h>
#include <sys/stat.h>
int main ()
{
  int segment_id;
  char* shared_memory[3];
  int segment_size;
  key_t shm_key;
  int i=0;
  const int shared_segment_size = 0x6400;
  /* Allocate a shared memory segment. */
  segment_id = shmget (shm_key, shared_segment_size,
            IPC_CREAT | IPC_EXCL | S_IRUSR | S_IWUSR);
  /* Attach the shared memory segment. */
  shared_memory[3] = (char*) shmat (segment_id, 0, 0);
  printf ("shared memory attached at address %p\n", shared_memory);
  /* Write a string to the shared memory segment. */
   sprintf(shared_memory[i], "maddy …