From af6f39063b4433ee73647159200d105994d75b49 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Sun, 26 Oct 1997 20:13:00 +0000 Subject: Update. 1997-10-26 18:12 Ulrich Drepper * libio/genops.c: Partial undo of last patch. * libio/stdfiles.c: Likewise. * libio/iofdopen.c: Use _IO_FILE_complete, not _IO_file_plus. * libio/iopopen.c: Likewise. * libio/iovdprintf.c: Likewise. * libio/libio.h: Remove duplicated `;'. * libio/stdio.c: Remove misleading comment. * libio/stdio.h: Declare standard streams as variables. * login/Makefile (distribute): Add README.utmpd. * login/README.utmpd: New file. Provided by Mark M. Kettenis . * manual/job.texi: Document tcgetsid. * manual/pattern.texi: Document globfree. * manual/terminal.texi: Document B38400 ... B460800. * posix/confstr.c: Print "-D_FILE_OFFSET_SIZE=64" for _CS_LFS_CFLAGS. * posix/unistd.h: Add explanation of _POSIX_* constants. * posix/unists.h: Add prototypes for __pread, __pread64, __pwrite and __pwrite64. * sysdeps/generic/pread.c: Define as __pread and make pread weak alias. * sysdeps/generic/pread64.c: Likewise. * sysdeps/generic/pwrite.c: Likewise. * sysdeps/generic/pwrite64.c: Likewise. * sysdeps/posix/pread.c: Likewise. * sysdeps/posix/pwrite.c: Likewise. * sysdeps/posix/pread64.c: New file. * sysdeps/posix/pwrite64.c: Likewise. * sysdeps/unix/sysv/linux/Makefile [$(subdir)=posix] (sysdep_routines): Add s_pread64 and s_pwrite64. * sysdeps/unix/sysv/linux/pread.c: New file. * sysdeps/unix/sysv/linux/pread64.c: New file. * sysdeps/unix/sysv/linux/pwrite.c: New file. * sysdeps/unix/sysv/linux/pwrite64.c: New file. * sysdeps/unix/sysv/linux/s_pread64.c: New file. * sysdeps/unix/sysv/linux/s_pwrite64.c: New file. * sysdeps/unix/sysv/linux/syscalls.list: Add pread and pwrite. * sysdeps/unix/sysv/linux/alpha/pread64.c: New (empty) file. * sysdeps/unix/sysv/linux/alpha/pwrite64.c: New (empty) file. * sysdeps/unix/sysv/linux/sparc/sparc64/pread64.c: New (empty) file. * sysdeps/unix/sysv/linux/sparc/sparc64/pwrite64.c: New (empty) file. * sysdeps/unix/sysv/linux/alpha/syscalls.list: Add pread and pwrite with weak aliases for *64 functions. * sysdeps/unix/sysv/linux/sparc/sparc64/syscalls.list: Likewise. * string/bits/string2.h: Add casts to allow void * arguments. * sysdeps/i386/i486/bits/string.h: Define index and rindex only if __USE_BSD or __USE_XOPEN_EXTENDED. * sysdeps/unix/sysv/linux/bits/socket.h: Add SCM_RIGHTS and other SCM_* constants from kernel header. * termios/termios.h: Add prototype for tcgetsid. 1997-10-26 13:26 Thorsten Kukuk * sunrpc/clnt_perr.c: Add trailing '\0' to strings. * sunrpc/get_myaddr.c: Include rpc/clnt.h for prototypes. * sunrpc/pmap_clnt.c: Use get_myaddress from header file. 1997-10-26 05:26 Ulrich Drepper * configure.in: Punt if any directory mentioned in the enable-add-on parameter does not exist. 1997-10-25 19:25 Ulrich Drepper * termios/Makefile (routines): Add tcgetsid. * termios/tcgetsid.c: New file. Provided by Mark M. Kettenis . 1997-10-25 18:56 Ulrich Drepper * stdlib/stdlib.h: Remove mblen optimization. * stdlib/mblen.c: Rewrite to make sure global state is not changed. Reported by anderson@metrolink.com. 1997-10-19 21:51 Wolfram Gloger * malloc/thread-m.h [_LIBC]: Use new __libc_internal_tsd_{set,get} interface for thread-specific data. 1997-10-25 06:51 Ulrich Drepper * elf/dl-addr.c: Use braces for correct logical grouping. Patch by Wolfram Gloger . 1997-10-18 09:15 Geoff Keating * io/ftwtest-sh: Sometimes /tmp is a symlink to somewhere more convenient; that caused this test to break. * sysdeps/powerpc/dl-machine.h: Fix typo. * sysdeps/powerpc/bits/fenv.h: Don't use floating-point registers when -msoft-float is in effect, because this causes compilation to stop. * sysdeps/powerpc/bits/mathinlines.h: Likewise. * rpm/template: Add description, use RPM flags rather than the ones used to build the spec. Build in a temporary directory, not /. * elf/dl-lookup.c: Don't include _itoa.h, it's not used. * elf/dl-minimal.c: Use _itoa_word rather than _itoa. It seems that _itoa is the only routine that ld.so uses that requires something from libgcc.a on powerpc, so it would be best to avoid it in ld.so. * elf/rtld.c: Likewise. * sysdeps/generic/_strerror.c: Likewise. * stdio-common/_itoa.c: Split out digits strings. * stdio-common/itoa-digits.c: New file. * stdio-common/Makefile: Add itoa-digits. 1997-10-21 Andreas Jaeger * manual/filesys.texi (Scanning Directory Content): Document error case more. * dirent/scandir.c (scandir): Ignore errors from select function. Suggested by urbanw@cs.umu.se (closes PR libc/316). 1997-10-25 06:18 Ulrich Drepper * sysdeps/unix/sysv/linux/sparc/sparc32/socket.S: Corrections. Patch by Erik Troan . 1997-10-25 04:00 Ulrich Drepper * sysdeps/generic/dl-cache.c (_dl_load_cache_lookup): Favour exact matching of version function if both the general (1) and glibc-specific (3) entry are present. 1997-10-22 18:47 Thorsten Kukuk * sunrpc/rpc/clnt.h: Add get_myaddress prototype. * nis/libnsl.map: Fix typo. * nis/nis_call.c: Fix memory leak. 1997-10-22 19:29 Ulrich Drepper * sysdeps/generic/memcmp.c: Define __P if not defined before. Patch by Jim Meyering . 1997-10-21 22:09 Ulrich Drepper * sysdeps/unix/sysv/linux/sys/prctl.h: New file by Richard Gooch . 1997-10-21 21:50 Ulrich Drepper * misc/syslog.c (vsyslog): Open console with O_NOCTTY. Patch by Zack Weinberg . 1997-10-21 18:07 Ulrich Drepper * posix/wordexp.c: Improve handling of $... expressions. Patch by Tim Waugh . 1997-10-21 16:12 Ulrich Drepper * manual/string.texi: Correct return values of bcopy and bzero. Patch by Matthew Wilcox . 1997-10-18 15:03 Philip Blundell * sysdeps/unix/sysv/linux/bits/socket.h: Correct types of some elements in struct msghdr and struct cmsghdr, to keep in step with the kernel. 1997-10-17 22:29 Ulrich Drepper * sysdeps/unix/sysv/linux/sparc/sparc32/init-first.h: Fix another bug in startup code. Patch by Eric Delaunay . 1997-10-16 20:17 Richard Henderson * sysdeps/unix/sysv/linux/sparc/sparc32/socket.S: Dump args to the stack and give the kernel a pointer. Use the sysdep.h macros. 1997-10-17 04:07 Ulrich Drepper * sysdeps/sparc/sparc32/elf/start.S: Calculate argv correctly. Patch by Eric Delaunay . 1997-10-16 Andreas Jaeger * sysdeps/libm-ieee754/s_nextafterxf.c [!__STDC__]: Correct typo. 1997-10-16 14:50 Ulrich Drepper * manual/pattern.texi: Document globfree. 1997-10-15 21:11 Philip Blundell * sysdeps/unix/sysv/linux/net/if_packet.h: New file. * sysdeps/unix/sysv/linux/Makefile (sysdep_headers): Add net/if_packet.h. * sysdeps/unix/sysv/linux/net/if_arp.h (ARPHRD_ASH): New type, for 64Mbps ASH. (ARPHRD_ETHER): This is used for 100Mbps networks too. 1997-10-15 Andreas Jaeger * Makerules (install): Use full pathnames for linker script. This is to work around a limitation in `ld' while no better solution is possible. 1997-10-15 Andreas Jaeger * malloc/malloc.c (mmap_chunk): Put inline before static in function definition to avoid compiler warning. (malloc_extend): Likewise. * sysdeps/generic/des_impl.c: Include "des.h" to avoid warning. 1997-10-15 Andreas Jaeger * NEWS: Fix @gnu.ai.mit.edu -> @gnu.org. * README.template: Likewise. * db/makedb.c: Likewise. * elf/ldd.bash.in: Likewise. * elf/ldd.sh.in: Likewise. * intl/locale.alias: Likewise. * login/programs/utmpd.c: Likewise. * libio/stdfiles.c [!_IO_MTSAFE] (DEF_STDFILE): Fix parameter list. 1997-10-14 Andreas Schwab * Rules: Remove all empty.* files. (shared-only-routines): Correct implementation. 1997-10-14 Andreas Schwab * sysdeps/libm-ieee754/s_lrintl.c: Make compilable. * sysdeps/libm-ieee754/s_llrintl.c: Likewise. Optimized. 1997-10-14 Andreas Schwab * elf/ldd.bash.in: Only prepend ./ if the file contains no slash at all. * elf/ldd.sh.in: Likewise. 1997-10-14 Andreas Schwab * sysdeps/m68k/sys/ucontext.h: New file. 1997-10-13 Andreas Schwab * sysdeps/m68k/fpu/s_scalbln.c: New (empty) file. * sysdeps/m68k/fpu/s_scalblnf.c: New (empty) file. * sysdeps/m68k/fpu/s_scalblnl.c: New (empty) file. * sysdeps/m68k/fpu/s_scalbn.c: Add scalbln alias. * sysdeps/m68k/fpu/s_scalbnf.c: Adapted. * sysdeps/m68k/fpu/s_scalbnl.c: Adapted. * sysdeps/m68k/fpu/s_lrint.c: Add standard skeleton stuff. * sysdeps/m68k/fpu/s_lrintf.c: New file. * sysdeps/m68k/fpu/s_lrintl.c: New file. * sysdeps/m68k/fpu/bits/mathinline.h: Add fma and scalbln. Update lrint and scalbn. (__m81_inline) [__cplusplus]: Define to __inline. * math/bits/mathcalls.h: Remove whitespace before second argument of __MATHDECL. Add note explaining this. 1997-10-13 Andreas Schwab * manual/arith.texi (Absolute Value): Spelling fix. 1997-10-13 Andreas Schwab * malloc/obstack.h (obstack_empty_p) [!__GNUC__]: Properly parenthesize the macro parameter. * Rules: Remove rules to magically install .h headers. --- login/Makefile | 2 +- login/README.utmpd | 174 +++++++++++++++++++++++++++++++++++++++++++++++++ login/programs/utmpd.c | 6 +- 3 files changed, 178 insertions(+), 4 deletions(-) create mode 100644 login/README.utmpd (limited to 'login') diff --git a/login/Makefile b/login/Makefile index 407330707b..3842b2f4af 100644 --- a/login/Makefile +++ b/login/Makefile @@ -32,7 +32,7 @@ install-sbin = utmpd utmpd-routines := connection database error request xtmp extra-objs := $(utmpd-routines:=.o) -distribute := utmp-private.h programs/xtmp.h programs/utmpd.h \ +distribute := utmp-private.h programs/xtmp.h programs/utmpd.h README.utmpd \ programs/utmpd-private.h $(utmpd-routines:%=programs/%.c) subdir-dirs = programs diff --git a/login/README.utmpd b/login/README.utmpd new file mode 100644 index 0000000000..d70b3d8de2 --- /dev/null +++ b/login/README.utmpd @@ -0,0 +1,174 @@ +With the introduction of version 2 of the GNU C Library the format of +the UTMP and WTMP files changed for some configurations (see Q&A 10 of +the FAQ). This version of the GNU C Library contains a solution for +the problems this may cause, by providing an UTMP daemon `utmpd'. + +Do I need it? +============= + +If your configuration is one of the following: + + i[3456]86-*-linux-gnu Linux-2.0 on Intel + m68k-*-linux-gnu Linux-2.0 on Motorola 680x0 + +you might need it, so please read on. If it is not, please read the +section titled `Programming' at the end of this text. + +In principle, you only need the daemon if you want to keep using old +programs linked against the previous version of the Linux C Library +(libc5). In addition you will need the daemon if you are running +Linux on Intel, and you are planning to use iBCS (Intel Binary +Compatibility Standard). If you have no libc5 programs left on your +system and you are not using iBCS, it is probably better not to +install the daemon since it uses (a small amount of) memory and CPU +time. But apart from that it shouldn't hurt to install `utmpd', so +when in doubt install it anyway. + + +Installation +============ + +The installation process (`make install') already places the `utmpd' +binary in $(sbindir). The only thing you have to do is modifying your +startup scripts to start the daemon. Unfortunately this is a bit of a +hassle, since the layout of these scripts is not standardized. You +should try to find the command that creates the file `/var/run/utmp'. +This is usually done in a script named `/etc/rc', `/etc/init.d/boot' +(Debian) or `/etc/rc.d/rc.S' (Slackware). You could try: + + grep utmp /etc/* /etc/init.d/* /etc/rc.d/* + +to find the right script. The creation of `/var/run/utmp' is usually +done with a command like: + + : > /var/run/utmp + +or + + cat /dev/null > /var/run/utmp + +Now add a line before this command to create the file `/var/run/utmpx' +e.g. + + : > /var/run/utmpx + +or + + cat /dev/null > /var/run/utmpx + +whatever you prefer, and after this command, add a line to start the +daemon + + utmpd + +The entire fragment could look something like + + # Clean up /var/run and create /var/run/utmp so that we can login. + ( cd /var/run && find . ! -type d -exec rm -f -- {} \; ) + : > /var/run/utmpx + : > /var/run/utmp + utmpd + +If the file `/var/log/wtmp' exists on your system, you will probably +want to create the file `/var/log/wtmpx'. Programs linked against the +GNU C Library will now write to `/var/log/wtmpx', while programs +linked against the old library will continue to write to +`/var/log/wtmp'. Of course this means that the information gets +spread over two files. We hope to provide a better solution in the +future. + +After a reboot, user accounting should be working again. If not, +please refer to the section titled `Troubleshooting' below before +submitting a bug report. + + +What is `utmpd' doing? +====================== + +After installation there will be two files that store the user +accounting information: `/var/run/utmp' and `/var/run/utmpx'. The +file `/var/run/utmp' will be in the old format so libc5 programs will +continue to work (even if they are broken and do not use the library +functions to access the user accounting database). And on Intel, you +can safely link `/var/run/utmp' to `/etc/utmp' for iBCS programs. +Programs linked against the new GNU C Library (glibc2) will contact +the daemon for all user accounting database access. The daemon will +store its information in `/var/run/utmpx' and keeps this file in sync +with `/var/run/utmp'. Entries added to `/var/run/utmpx' will be +converted to the old format and will be added to `/var/run/utmp' and +vice versa. This way both libc5 and glibc2 see the same information +in the same fields of `struct utmp'. Of course libc5 programs see only +part of the information that glibc2 programs see because not all +members of the glibc2 `struct utmp' are present in the libc5 `struct +utmp'. For the same reason libc5 will see a truncated version of +those fields where the length of the glibc2 field is larger than the +corresponding libc5 field (ut_user, ut_line, ut_host). + + +Troubleshooting +=============== + +If user accounting is not working on your system, e.g. programs like +`who' or `logname' return rubbish, or you cannot login, make +sure that: + +* The file `/var/run/utmpx' exists. + +* The file `/var/log/wtmpx' exists. + +* No program linked against the GNU C Library (libc6) is accessing + `/var/run/utmp' directly (see the section on `Programming' below). + +If that does not solve your problems, please use the `glibcbug' script +to report the problem to . + +The `utmpd' daemon uses `syslogd' to report problems. It uses the +`daemon' facility and `warning' and `error' levels. Alternatively you +could use the following option to ease debugging: + +`--debug' + Use this option if you want the daemon to output its warnings and + error messages to the terminal instead of sending them to the + system logger (`syslogd'). When using this option the daemon does + not auto-background itself. + +To use this option you should first kill the daemon that is already +running, and start a fresh one with the desired option: + + kill `cat /var/run/utmpd.pid` + utmpd --debug + +Please include any warnings or error messages from `utmpd' in your +bug reports. + + +Programming +=========== + +In order for the `utmpd' approach to work it is essential that NO +program EVER accesses the UTMP and WTMP files directly. Instead, a +program should use ONLY the available library functions: + + * utmpname() Select the database used (UTMP, WTMP, ...). + * setutent() Open the database. + * getutent() Read the next entry from the database. + * getutid() Search for the next entry with a specific ID. + * getutline() Search for the next entry for a specific line. + * pututline() Write an entry to the database. + * endutent() Close the database. + * updwtmp() Add an entry to a database (WTMP, ...). + +For details, please refer to `The GNU C Library Reference Manual', +which also contains information about some additional functions +derived from BSD and XPG that may be of interest. The command + + info libc "User Accounting Database" + +should point you at the right location. + +If you encounter a program that reads from or, even worse, writes to +the UTMP and WTMP files directly, please report this as a bug to the +author of that program. Note that the files referred to by the macros +`_PATH_UTMP' and `_PATH_WTMP' might even disappear in the future, so +please do not use these, except in a call to `utmpname()' or +`updwtmp()', not even to check their existence. diff --git a/login/programs/utmpd.c b/login/programs/utmpd.c index e0648ebb42..c2e9fe0a8b 100644 --- a/login/programs/utmpd.c +++ b/login/programs/utmpd.c @@ -144,7 +144,7 @@ warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\ /* Cleanup files created by a previous `bind'. */ unlink (_PATH_UTMPD_RO); unlink (_PATH_UTMPD_RW); - + /* Open UTMP database. */ utmp_db = open_database (_PATH_UTMP "x", _PATH_UTMP); if (utmp_db == NULL) @@ -205,7 +205,7 @@ Usage: %s [OPTION]...\n\ -V, --version output version information and exit\n"), program_invocation_name); fputs (_("\ -Report bugs using the `glibcbug' script to .\n"), +Report bugs using the `glibcbug' script to .\n"), stdout); } @@ -252,7 +252,7 @@ make_socket (const char *name) size = (offsetof (struct sockaddr_un, sun_path) + strlen (addr.sun_path)); - + if (bind (sock, (struct sockaddr *) &addr, size) < 0) error (EXIT_FAILURE, errno, "%s", name); -- cgit 1.4.1