I noticed in the /var/log/auth.log of my musl server: Feb 22 08:27:29 auth01 sshd[1930]: PAM unable to dlopen(/lib/security/pam_lastlog.so): Error loading shared library /lib/security/pam_lastlog.so: No such file or directory Feb 22 08:27:29 auth01 sshd[1930]: PAM adding faulty module: /lib/security/pam_lastlog.so Feb 22 08:27:32 auth01 sshd[1930]: Accepted publickey for root from 172.16.11.1 port 59401 ssh2: ED25519 SHA256:Qvj665cWCNZDAGXBPFfpHU99mTflkkj+UN4gaKNh2Ag Feb 22 08:27:32 auth01 sshd[1930]: pam_unix(sshd:session): session opened for user root(uid=0) by (uid=0) Feb 22 08:27:33 auth01 sshd[1932]: lastlog_openseek: Couldn't stat /var/log/lastlog: No such file or directory Feb 22 08:35:35 auth01 sshd[1993]: PAM unable to dlopen(/lib/security/pam_lastlog.so): Error loading shared library /lib/security/pam_lastlog.so: No such file or directory Feb 22 08:35:35 auth01 sshd[1993]: PAM adding faulty module: /lib/security/pam_lastlog.so Feb 22 08:35:38 auth01 sshd[1993]: Accepted publickey for root from 172.16.11.1 port 59792 ssh2: ED25519 SHA256:Qvj665cWCNZDAGXBPFfpHU99mTflkkj+UN4gaKNh2Ag Feb 22 08:35:38 auth01 sshd[1993]: pam_unix(sshd:session): session opened for user root(uid=0) by (uid=0) Feb 22 08:35:39 auth01 sshd[1995]: lastlog_openseek: Couldn't stat /var/log/lastlog: No such file or directory I realise there is no utmps support (yet) in Gentoo, but I wouldn't expect PAM unable to dlopen errors. On my glibc server, it is there, but it's missing on musl: code01 ~ # qfile /lib64/security/pam_lastlog.so sys-libs/pam: /lib64/security/pam_lastlog.so auth01 ~ # stat /lib/security/pam_lastlog.so stat: cannot stat '/lib/security/pam_lastlog.so': No such file or directory Both are running stable amd64. musl box: Portage 3.0.61 (python 3.11.7-final-0, default/linux/amd64/17.0/musl/hardened, gcc-13, musl-1.2.3-r8, 6.6.13-gentoo-dist x86_64) ================================================================= System uname: Linux-6.6.13-gentoo-dist-x86_64-AMD_EPYC-Rome_Processor-with-libc KiB Mem: 8133224 total, 7497652 free KiB Swap: 0 total, 0 free Timestamp of repository gentoo: Wed, 21 Feb 2024 02:30:00 +0000 Head commit of repository gentoo: 1ae87d3661cf33b77e5216d7f36f7f6346e3f9fb sh bash 5.1_p16-r6 ld GNU ld (Gentoo 2.41 p5) 2.41.0 app-misc/pax-utils: 1.3.7::gentoo app-shells/bash: 5.1_p16-r6::gentoo dev-build/autoconf: 2.71-r6::gentoo dev-build/automake: 1.16.5-r2::gentoo dev-build/libtool: 2.4.7-r2::gentoo dev-build/make: 4.4.1-r1::gentoo dev-build/meson: 1.3.1-r1::gentoo dev-java/java-config: 2.3.3-r1::gentoo dev-lang/perl: 5.38.2-r1::gentoo dev-lang/python: 3.11.7::gentoo, 3.12.1_p1::gentoo sys-apps/baselayout: 2.14-r2::gentoo sys-apps/openrc: 0.53::gentoo sys-apps/sandbox: 2.38::gentoo sys-devel/binutils: 2.41-r5::gentoo sys-devel/binutils-config: 5.5::gentoo sys-devel/gcc: 13.2.1_p20240113-r1::gentoo sys-devel/gcc-config: 2.11::gentoo sys-kernel/linux-headers: 6.6::gentoo (virtual/os-headers) sys-libs/musl: 1.2.3-r8::gentoo Repositories: gentoo location: /var/db/repos/gentoo sync-type: rsync sync-uri: rsync://rsync.gentoo.org/gentoo-portage priority: -1000 volatile: False sync-rsync-extra-opts: sync-rsync-verify-jobs: 1 sync-rsync-verify-max-age: 3 sync-rsync-verify-metamanifest: yes Binary Repositories: gentoobinhost priority: 1 sync-uri: https://gentoo.osuosl.org/releases/amd64/binpackages/17.1/x86-64_musl_hardened ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="@FREE @FREE linux-fw-redistributable" CBUILD="x86_64-gentoo-linux-musl" CFLAGS="-O2 -pipe -march=native" CHOST="x86_64-gentoo-linux-musl" CONFIG_PROTECT="/etc /usr/share/gnupg/qualified.txt" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/sandbox.d /etc/terminfo" CXXFLAGS="-O2 -pipe -march=native" DISTDIR="/var/cache/distfiles" ENV_UNSET="CARGO_HOME DBUS_SESSION_BUS_ADDRESS DISPLAY GDK_PIXBUF_MODULE_FILE GOBIN GOPATH PERL5LIB PERL5OPT PERLPREFIX PERL_CORE PERL_MB_OPT PERL_MM_OPT XAUTHORITY XDG_CACHE_HOME XDG_CONFIG_HOME XDG_DATA_HOME XDG_RUNTIME_DIR XDG_STATE_HOME" FCFLAGS="-O2 -pipe -march=native" FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs binpkg-multi-instance buildpkg-live candy config-protect-if-modified distlocks downgrade-backup ebuild-locks fixlafiles ipc-sandbox merge-sync network-sandbox news noinfo parallel-fetch pid-sandbox pkgdir-index-trusted preserve-libs protect-owned qa-unresolved-soname-deps sandbox sfperms splitdebug strict unknown-features-warn unmerge-backup unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr" FFLAGS="-O2 -pipe -march=native" GENTOO_MIRRORS="https://ftp.lysator.liu.se/gentoo/" INSTALL_MASK="charset.alias /usr/share/locale/locale.alias" LANG="C.UTF8" LDFLAGS="-Wl,-O1 -Wl,--as-needed" LEX="flex" MAKEOPTS="-j8" PKGDIR="/var/cache/binpkgs" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages --exclude=/.git" PORTAGE_TMPDIR="/var/tmp" SHELL="/bin/bash" USE="acl amd64 bzip2 cet cli crypt dri fortran hardened iconv ipv6 libedit libtirpc ncurses openmp pam pcre pic pie seccomp split-usr ssl ssp test-rust unicode verify-sig xattr xtpax zlib" ABI_X86="64" ADA_TARGET="gnat_2021" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_anon authn_dbm authn_file authz_dbm authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir env expires ext_filter file_cache filter headers include info log_config logio mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="karbon sheets words" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="aes avx avx2 f16c fma3 mmx mmxext pclmul popcnt rdrand sha sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3" ELIBC="musl" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock greis isync itrax mtk3301 ntrip navcom oceanserver oncore rtcm104v2 rtcm104v3 sirf skytraq superstar2 tsip tripmate tnt ublox" GRUB_PLATFORMS="pc" INPUT_DEVICES="libinput" KERNEL="linux" LCD_DEVICES="bayrad cfontz glk hd44780 lb216 lcdm001 mtxorb text" LUA_SINGLE_TARGET="lua5-1" LUA_TARGETS="lua5-1" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php8-1" POSTGRES_TARGETS="postgres15" PYTHON_SINGLE_TARGET="python3_11" PYTHON_TARGETS="python3_11" RUBY_TARGETS="ruby31" VIDEO_CARDS="amdgpu fbdev intel nouveau radeon radeonsi vesa dummy" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipp2p iface geoip fuzzy condition tarpit sysrq proto logmark ipmark dhcpmac delude chaos account" Unset: ADDR2LINE, AR, ARFLAGS, AS, ASFLAGS, CC, CCLD, CONFIG_SHELL, CPP, CPPFLAGS, CTARGET, CXX, CXXFILT, ELFEDIT, EMERGE_DEFAULT_OPTS, EXTRA_ECONF, F77FLAGS, FC, GCOV, GPROF, LC_ALL, LD, LFLAGS, LIBTOOL, LINGUAS, MAKE, MAKEFLAGS, NM, OBJCOPY, OBJDUMP, PORTAGE_BINHOST, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, PYTHONPATH, RANLIB, READELF, RUSTFLAGS, SIZE, STRINGS, STRIP, YACC, YFLAGS glibc box: Portage 3.0.61 (python 3.11.7-final-0, default/linux/amd64/17.1, gcc-13, glibc-2.38-r10, 5.10.27-gentoo-x86_64 x86_64) ================================================================= System uname: Linux-5.10.27-gentoo-x86_64-x86_64-AMD_EPYC_7601_32-Core_Processor-with-glibc2.38 KiB Mem: 8150868 total, 153828 free KiB Swap: 524284 total, 332 free Timestamp of repository gentoo: Fri, 16 Feb 2024 07:00:01 +0000 Head commit of repository gentoo: 662989ac5bf92f3110b4f5fa93d9ec644eb4dccc sh bash 5.1_p16-r6 ld GNU ld (Gentoo 2.41 p4) 2.41.0 app-misc/pax-utils: 1.3.7::gentoo app-shells/bash: 5.1_p16-r6::gentoo dev-build/autoconf: 2.71-r6::gentoo dev-build/automake: 1.16.5-r2::gentoo dev-build/cmake: 3.27.9::gentoo dev-build/libtool: 2.4.7-r1::gentoo dev-build/make: 4.4.1-r1::gentoo dev-build/meson: 1.3.0-r2::gentoo dev-lang/perl: 5.38.2-r1::gentoo dev-lang/python: 3.11.7::gentoo, 3.12.1_p1::gentoo sys-apps/baselayout: 2.14-r2::gentoo sys-apps/openrc: 0.53::gentoo sys-apps/sandbox: 2.38::gentoo sys-devel/binutils: 2.41-r3::gentoo sys-devel/binutils-config: 5.5::gentoo sys-devel/gcc: 13.2.1_p20230826::gentoo sys-devel/gcc-config: 2.11::gentoo sys-kernel/linux-headers: 6.6::gentoo (virtual/os-headers) sys-libs/glibc: 2.38-r10::gentoo Repositories: gentoo location: /var/db/repos/gentoo sync-type: rsync sync-uri: rsync://rsync.gentoo.org/gentoo-portage priority: -1000 volatile: False sync-rsync-verify-max-age: 24 sync-rsync-verify-jobs: 1 sync-rsync-verify-metamanifest: yes sync-rsync-extra-opts: ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="* -@EULA" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O2 -pipe -march=native -frecord-gcc-switches" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/share/gnupg/qualified.txt" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo" CXXFLAGS="-O2 -pipe -march=native -frecord-gcc-switches" DISTDIR="/var/cache/distfiles" ENV_UNSET="CARGO_HOME DBUS_SESSION_BUS_ADDRESS DISPLAY GDK_PIXBUF_MODULE_FILE GOBIN GOPATH PERL5LIB PERL5OPT PERLPREFIX PERL_CORE PERL_MB_OPT PERL_MM_OPT XAUTHORITY XDG_CACHE_HOME XDG_CONFIG_HOME XDG_DATA_HOME XDG_RUNTIME_DIR XDG_STATE_HOME" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs buildpkg-live candy config-protect-if-modified distlocks downgrade-backup ebuild-locks fixlafiles ipc-sandbox merge-sync multilib-strict network-sandbox news noinfo parallel-fetch pid-sandbox pkgdir-index-trusted preserve-libs protect-owned qa-unresolved-soname-deps sandbox sfperms splitdebug strict test unknown-features-warn unmerge-backup unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr" FFLAGS="-O2 -pipe" GENTOO_MIRRORS="http://mirrors.rit.edu/gentoo/" LANG="C.UTF-8" LDFLAGS="-Wl,-O1 -Wl,--as-needed" LEX="flex" MAKEOPTS="-j2" PKGDIR="/var/cache/binpkgs" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages --exclude=/.git" PORTAGE_TMPDIR="/var/tmp" SHELL="/bin/bash" USE="acl amd64 bzip2 cli crypt dri fortran gdbm iconv ipv6 libtirpc multilib ncurses nls openmp pam pcre readline seccomp split-usr ssl test test-rust unicode xattr zlib" ABI_X86="64" ADA_TARGET="gnat_2021" APACHE2_MODULES="access_compat actions alias auth_basic authn_alias authn_anon authn_core authn_dbm authn_file authz_core authz_dbm authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir env expires ext_filter file_cache filter headers include info log_config logio md mime mime_magic negotiation proxy proxy_http rewrite setenvif socache_shmcb speling status unique_id unixd userdir usertrack vhost_alias watchdog" CALLIGRA_FEATURES="karbon sheets words" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="aes avx avx2 f16c fma3 mmx mmxext pclmul popcnt rdrand sha sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock greis isync itrax mtk3301 ntrip navcom oceanserver oncore rtcm104v2 rtcm104v3 sirf skytraq superstar2 tsip tripmate tnt ublox" INPUT_DEVICES="libinput" KERNEL="linux" LCD_DEVICES="bayrad cfontz glk hd44780 lb216 lcdm001 mtxorb text" LUA_SINGLE_TARGET="lua5-1" LUA_TARGETS="lua5-1" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php8-1" POSTGRES_TARGETS="postgres15" PYTHON_SINGLE_TARGET="python3_11" PYTHON_TARGETS="python3_11" RUBY_TARGETS="ruby31" VIDEO_CARDS="amdgpu fbdev intel nouveau radeon radeonsi vesa dummy" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipp2p iface geoip fuzzy condition tarpit sysrq proto logmark ipmark dhcpmac delude chaos account" Unset: ADDR2LINE, AR, ARFLAGS, AS, ASFLAGS, CC, CCLD, CONFIG_SHELL, CPP, CPPFLAGS, CTARGET, CXX, CXXFILT, ELFEDIT, EMERGE_DEFAULT_OPTS, EXTRA_ECONF, F77FLAGS, FC, GCOV, GPROF, INSTALL_MASK, LC_ALL, LD, LFLAGS, LIBTOOL, LINGUAS, MAKE, MAKEFLAGS, NM, OBJCOPY, OBJDUMP, PORTAGE_BINHOST, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, PYTHONPATH, RANLIB, READELF, RUSTFLAGS, SIZE, STRINGS, STRIP, YACC, YFLAGS Both are using pam 1.5.3 with default USE: code01 ~ # eix -I sys-libs/pam [I] sys-libs/pam Available versions: 1.5.3 ~1.5.3-r1 {audit berkdb debug +filecaps nis selinux split-usr ABI_MIPS="n32 n64 o32" ABI_S390="32 64" ABI_X86="32 64 x32"} Installed versions: 1.5.3(04:58:12 11/29/23)(filecaps split-usr -audit -berkdb -debug -nis -selinux ABI_MIPS="-n32 -n64 -o32" ABI_S390="-32 -64" ABI_X86="64 -32 -x32") Homepage: https://github.com/linux-pam/linux-pam Description: Linux-PAM (Pluggable Authentication Modules) auth01 ~ # eix -I sys-libs/pam [I] sys-libs/pam Available versions: 1.5.3 ~1.5.3-r1 {audit berkdb debug +filecaps nis selinux split-usr ABI_MIPS="n32 n64 o32" ABI_S390="32 64" ABI_X86="32 64 x32"} Installed versions: 1.5.3(14:42:45 01/16/24)(split-usr -audit -berkdb -debug -filecaps -nis -selinux ABI_MIPS="-n32 -n64 -o32" ABI_S390="-32 -64" ABI_X86="64 -32 -x32") Homepage: https://github.com/linux-pam/linux-pam Description: Linux-PAM (Pluggable Authentication Modules) Note that auth01 (the musl box)'s installed version is actually the date the stage was built; I have never merged it myself there. Since the ebuild explicitly calls --enable-lastlog, I guess it's some issue with their build system. I haven't build-tested it yet because this system doesn't have an external connection to the network, but I'll try on a different musl amd64 and post the build log.
Created attachment 885673 [details] build log for sys-libs/pam-1.5.3 on a musl amd64 system Indeed, --enable-lastlog is passed, lastlog.h is correctly seen by configure, and it installs the man page.. but never builds the module.
I remember noticing this a while ago now you say it..
configure checks for the logwtmp function, and silently disables lastlog if the function is not available. https://github.com/linux-pam/linux-pam/blob/v1.6.0/configure.ac#L760 musl does not provide logwtmp.
also stubmled upon this. It seems Adelie Linux has some progress? https://git.adelielinux.org/adelie/packages/-/blob/current/system/procps/use-utmpx.patch
