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Re: A new glibc bug

> 
> >>>>> H J Lu writes:
> 
> HJ> With the current glibc 2.1.2 in CVS today, I got
> HJ> # rlogin foo
> HJ> zsh: 1746 segmentation fault  rlogin foo
> 
> HJ> where "foo" is an unknown host. With glibc 2.1.1, I got
> 
> HJ> # rlogin foo
> HJ> foo: Unknown host
> 
> HJ> Any ideas?
> 
> It breaks in rcmd:
> (gdb) r foo
> Starting program: /usr/bin/rlogin foo
> 
> Program received signal SIGSEGV, Segmentation fault.
> 0x400e4910 in rcmd (ahost=0xbffff7cc, rport=258, locuser=0x804d6b0 "root", 
>     remuser=0x804d6b0 "root", cmd=0xbffff7d4 "xterm/38400", fd2p=0x0)
>     at rcmd.c:103
> 103             *ahost = hp->h_name;
> (gdb) bt
> #0  0x400e4910 in rcmd (ahost=0xbffff7cc, rport=258, locuser=0x804d6b0 "root", 
>     remuser=0x804d6b0 "root", cmd=0xbffff7d4 "xterm/38400", fd2p=0x0)
>     at rcmd.c:103
> #1  0x80492e9 in _start ()
> 
> 	while (__gethostbyname_r (*ahost, &hostbuf, tmphstbuf, hstbuflen,
> 				  &hp, &herr) < 0)
> __gethostbyname_r returned 0 and hp was set to null.
> 

No. __gethostbyname_r now returns errno for error. I have no ideas
how codes like this are in glibc and in the user programs. I don't
like this change from POSIX.


H.J.
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