From: Keith.S.Thompson+u@gmail.com   
      
   scott@slp53.sl.home (Scott Lurndal) writes:   
   > Keith Thompson  writes:   
   [...]   
   >>That's not clear.  Linux (since 2022) guarantees argc>=1.   
   >   
   > Does it?  That seems to be up to the shell, since the exec()   
   > manual pages on the latest Fedora Core release don't indicate   
   > that argv[0] must be initialized or that argc be greater than zero.   
      
   As I understand it, all the exec() functions go through the execve()   
   system call.  In 2022, the Linux kernel execve() implementation was   
   modified to guarantee that argc>0 and argv[0]!=NULL in the invoked   
   program.  A shell presumably can't bypass that.   
      
   commit dcd46d897adb70d63e025f175a00a89797d31a43   
   Author: Kees Cook    
   Date:   2022-01-31 16:09:47 -0800   
      
       exec: Force single empty string when argv is empty   
      
   --   
   Keith Thompson (The_Other_Keith) Keith.S.Thompson+u@gmail.com   
   void Void(void) { Void(); } /* The recursive call of the void */   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)