Alan Cox wrote:
I was at BTL in the very early '80s. Writing kernel mods and drivers
for Unix, and teaching Unix internals to BTL employees. It's always been
"superuser". I don't know where anyone got this lame "substitute user"
stuff, but it's not authentic.
To quote the V7 manual page
-su \- substitute user id temporarily
So although a lot of people believe su is superuser, they are wrong.
Alan
from UNIX V6[1]
$ cat su.c
/* su -- become super-user */
char password[100];
char pwbuf[100];
int ttybuf[3];
main()
{
register char *p, *q;
extern fin;
if(getpw(0, pwbuf))
goto badpw;
(&fin)[1] = 0;
p = pwbuf;
while(*p != ':')
if(*p++ == '\0')
goto badpw;
if(*++p == ':')
goto ok;
[1]http://www.roesler-ac.de/wolfram/acro/credits.htm#2
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