busybox 1.10.1源码下载
一个集成了一百多个最常用linux命令和工具的软件,他甚至还集成了一个http服务器和一个telnet服务器
源代码在线查看： invert.tests
# tests of return value inversion # placeholder for future expansion # user subshells (...) did this wrong in bash versions before 2.04 ! ( echo hello | grep h >/dev/null 2>&1 ); echo $? ! echo hello | grep h >/dev/null 2>&1 ; echo $? ! true ; echo $? ! false; echo $? ! (false) ; echo $? ! (true); echo $? ! true | false ; echo $? ! false | true ; echo $? ! (true | false) ; echo $? ! (false | true) ; echo $?
