字符字符串[SIZE]
freopen函数（的/ dev / null的，一，标准输出）;
则setbuf（标准输出，字符串）;
 

请参见 freopen函数并的则setbuf 对它们的定义

in C i want to redirect the output of a process from stdout to write to a "shared memory segment" which can be thought of as a char array or a string with a pointer
i know that there is dup2 but it takes file discriptors as argument not a pointer to an array. is there any way to redirect it to a string?

char string[SIZE];
freopen("/dev/null", "a", stdout);
setbuf(stdout, string);

see freopen and setbuf for their definitions