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Date: Mon, 14 May 2012 17:09:31 -0700
From: Isaac Dunham <>
Subject: Re: make -i with linux-pam

On Mon, 14 May 2012 00:11:06 -0400
Rich Felker <> wrote:

> On Sun, May 13, 2012 at 08:58:24PM -0700, Isaac Dunham wrote:
> > .libs/pam_group.o: In function `check_account':
> > pam_group.c:(.text+0x12fe): undefined reference to `innetgr'
innetgr stub attached as patch.

> Basically the problems break down into:
> - missing crypt_r public interface
> - missing NIS/RPC
> - missing rhosts stuff
> - missing netgroup stuff
> - a few minor header file issues

Apparently also logwtmp is missing:
Making all in pam_lastlog
make[3]: Entering directory
`/home/ibid/misc/src/musl/Linux-PAM-1.1.3/modules/pam_lastlog' /bin/sh ../../libtool
--tag=CC   --mode=link musl-gcc -I../../libpam/include
-I../../libpamc/include -fno-stack-protector -D_GNU_SOURCE
-D_BSD_SOURCE -I/opt/musl/linux-headers/include -I/opt/musl/pincl
-lssp_nonshared -W -Wall -Wbad-function-cast -Wcast-align -Wcast-qual
-Wmissing-declarations -Wmissing-prototypes -Wpointer-arith
-Wreturn-type -Wstrict-prototypes -Wwrite-strings -Winline -Wshadow
-no-undefined -avoid-version -module
-Wl,--version-script=./../ -Wl,--as-needed
-Wl,--no-undefined -Wl,-O1 -o
-rpath /opt/musl/lib/security pam_lastlog.lo -L../../libpam -lpam
-lutil libtool: link: musl-gcc -shared  .libs/pam_lastlog.o
-Wl,-rpath -Wl,/home/ibid/misc/src/musl/Linux-PAM-1.1.3/libpam/.libs
-Wl,-rpath -Wl,/opt/musl/lib
-L/home/ibid/misc/src/musl/Linux-PAM-1.1.3/libpam /home/ibid/misc/src/musl/Linux-PAM-1.1.3/libpam/.libs/
-lssp_nonshared -ldl -lutil  -Wl,--version-script=./../
-Wl,--as-needed -Wl,--no-undefined -Wl,-O1   -Wl,-soname
-Wl, -o .libs/ .libs/pam_lastlog.o: In
function `last_login_write': pam_lastlog.c:(.text+0x9ea): undefined
reference to `logwtmp' .libs/pam_lastlog.o: In function
`pam_sm_close_session': pam_lastlog.c:(.text+0x11b4): undefined
reference to `logwtmp' collect2: ld returned 1 exit status make[3]: ***
[] Error 1 make[3]: Leaving directory

logwtmp would be _BSD_SOURCE || _GNU_SOURCE

Due to what logwtmp does (construct a wtmp log entry, then add to the
system logfile), a stub doesn't sound sensible unless you
actually want all logins to go unrecorded...however, it looks close to
trivial to actually implement.
The BSDs implement this with strncpy--should an implementation for
musl use XOPEN or GNU functions only, or are strn* acceptable?

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