popen导致分段错误

Question

我在我的c程序中使用了popen函数来执行shell命令并返回结果。它的工作效率达到了90％，但遗憾的是，由于某种原因，有时我会出现分段错误。

以下是代码位置和gdb stacktrace：

FILE *fp = popen("ip route list | grep default | awk '{print $5}' | tr -d '\n'", "r");

堆栈跟踪：

Program received signal SIGSEGV, Segmentation fault.
_int_malloc (av=0x7ffff795d760 <main_arena>, bytes=256) at malloc.c:3491
3491    malloc.c: No such file or directory.
(gdb) bt
#0  _int_malloc (av=0x7ffff795d760 <main_arena>, bytes=256) at malloc.c:3491
#1  0x00007ffff761dae0 in __GI___libc_malloc (bytes=256) at malloc.c:2893
#2  0x00007ffff760ac48 in _IO_new_popen (command=0x415128 "ip route list | grep default | awk '{print $5}' | tr -d '\n'", mode=0x414fde "r") at iopopen.c:288