"This page intentionally left non-blank"? 14. des. 2017 10:26 p.m. skrev "Christian Weisgerber" <na...@mips.inka.de>:
On 2017-12-13, Ingo Schwarze <schwa...@usta.de> wrote: > That is not a stand-alone command, but a shell built-in. > Actually, it is not even possible to implement it as a stand-alone > command because the effect of the intended change would end when > the command exits. I think there is/was a POSIX requirement, or at least some people interpreted it that way, that all shell builtins must also exist as external commands, and I seem to remember one system, AIX I think, that actually had an external version of cd(1). It didn't do anything sensible, of course, but it was there. Indeed, proof that I'm not hallucinating this: https://www.ibm.com/support/knowledgecenter/en/ssw_aix_72/ com.ibm.aix.cmds1/cd.htm | Note | Running /usr/bin/cd from a shell does not change the shell's working | directory. The shell's built-in cd command must be used. -- Christian "naddy" Weisgerber na...@mips.inka.de
