吾用ping测试，结果崩溃了，而且莫名其妙的．难道是晚上跑，内存用光了？
[Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". Core was generated by `./gh_manager thread false 1'. Program terminated with signal SIGSEGV, Segmentation fault. #0 malloc_consolidate (av=av@entry=0x7f8af8000020) at malloc.c:4167 4167 malloc.c: 没有那个文件或目录. [Current thread is 1 (Thread 0x7f8ba1fff700 (LWP 25566))] (gdb) backtrace #0 malloc_consolidate (av=av@entry=0x7f8af8000020) at malloc.c:4167 #1 0x00007f8c5ec95cde in _int_malloc (av=av@entry=0x7f8af8000020, bytes=bytes@entry=4096) at malloc.c:3450 #2 0x00007f8c5ec98184 in __GI___libc_malloc (bytes=bytes@entry=4096) at malloc.c:2913 #3 0x00007f8c5ec811d5 in __GI__IO_file_doallocate (fp=0x7f8af8000a00) at filedoalloc.c:127 #4 0x00007f8c5ec8f594 in __GI__IO_doallocbuf (fp=fp@entry=0x7f8af8000a00) at genops.c:398 #5 0x00007f8c5ec8e69c in _IO_new_file_underflow (fp=0x7f8af8000a00) at fileops.c:556 #6 0x00007f8c5ec8f60e in __GI__IO_default_uflow (fp=0x7f8af8000a00) at genops.c:413 #7 0x00007f8c5ec82c6a in __GI__IO_getline_info (fp=fp@entry=0x7f8af8000a00, buf=buf@entry=0x7f8ba1ffd080 "ping -c 1 192.168.1.104", n=1023, delim=delim@entry=10, extract_delim=extract_delim@entry=1, eof=eof@entry=0x0) at iogetline.c:60 #8 0x00007f8c5ec82d78 in __GI__IO_getline (fp=fp@entry=0x7f8af8000a00, buf=buf@entry=0x7f8ba1ffd080 "ping -c 1 192.168.1.104", n=<optimized out>, delim=delim@entry=10, extract_delim=extract_delim@entry=1) at iogetline.c:34 #9 0x00007f8c5ec81b7d in _IO_fgets ( buf=0x7f8ba1ffd080 "ping -c 1 192.168.1.104", n=<optimized out>, ---Type <return> to continue, or q <return> to quit--- fp=0x7f8af8000a00) at iofgets.c:53 #10 0x00007f8c5ea10431 in ping_ip (ip=0x7f8ba1ffd530 "192.168.1.104") at gh_kit.cpp:88
解决办法：
读取ping的结果时，不要用gets()，而是通过>输出到文件，然后读取这个文件。
