Update.

1997-05-29 12:48  Ulrich Drepper  <drepper@cygnus.com>

	* io/ftw.c: Complete rewrite.  Add implementation of `nftw'.
	* io/ftw.h: Update for new implementation and XPG4.2.

	* login/Makefile: Update for UTMP daemon implementation.

	Update resolver code to bind-4.9.6-T1A.
	* resolv/Banner: Update.
	* nss/digits_dots.c: Adapt text address matching to T1A.
	* nss/nss_files/files-hosts.c: Always use inet_pton.
	* resolv/base64.c (b64_pton): Follow T1A but don't use this code since
	it would lead to warnings.
	* resolv/gethnamaddr.c (getanswer): Test host name for maximal length
	at several places.
	* resolv/inet_net_pton.c (inet_net_pton_ipv4): Correct typo in comment.
	* resolv/res_comp.c (dn_expand): Check for overflow.
	(dn_comp): Likewise.
	* resolv/res_debug.c (precsize_aton): Better implementation.
	* resolv/res_init.c (res_init): Make `buf' of size MAXDNAME.
	* resolv/res_send.c (res_send): Check for overflow in descriptor set.
	* resolv/nss_dns/dns-host.c (getanswer_r): Test host name for maximal
	length at several places.

1997-05-29 12:51  Mark Kettenis  <kettenis@phys.uva.nl>

	* login/utmp-private.h (struct utfuncs): Add one more parameter
	to updwtmp function.
	Declare all three function jump tables.
	* login/utmp.h: Declare __utmpname.
	* login/getutent_r.c: Remove db backend and provide support for
	utmpd backend.
	* login/login.c: Use `updwtmp' function insteead of writing the
	record ourself.
	* login/logwtmp.c: Move `updwtmp' function to...
	* login/updwtmp.c: ...here.  New file.
	* login/utmp_db.h: Removed.
	* login/utmp_file.c: Add updwtmp function to write to file.
	* login/utmp_daemon.c: New file.  Daemon backend.
	* login/utmpname.c: New file.  Implementation of utmpname function.
	* login/utmpdump.c: New file.  Tool to dump utmp-like files.
	* login/utmpd/connection.c: New file.
	* login/utmpd/database.c: New file.
	* login/utmpd/error.c: New file.
	* login/utmpd/request.c: New file.
	* login/utmpd/utmpd-private.h: New file.
	* login/utmpd/utmpd.c: New file.
	* login/utmpd/utmpd.h: New file.
	* login/utmpd/xtmp.c: New file.
	* login/utmpd/xtmp.h: New file.

1997-05-29 12:28  Jim Meyering  <meyering@eng.ascend.com>

	* time/strftime.c: Correct/normalize indentation in cpp directives.

1997-05-28 20:43  Philip Blundell  <pjb27@cam.ac.uk>

	* nis/nis_error.c: Include <string.h> to fix warning.
	* nis/nis_print.c: Likewise.
	* nis/nss_nisplus/nisplus-hosts.c: Arg 3 of map_v4v6_hostent
	is int* not size_t*.

1997-05-28 21:56  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* math/cmathcalls.h: Correct typo in comment.

	* inet/netinet/icmp6.h: Include <netinet/in.h> for in6_addr.

	* sysdeps/unix/sysv/linux/netinet/ip_fw.h: Include <net/if.h> for
	IFNAMSIZ.

	* sysdeps/unix/sysv/linux/net/ppp_defs.h: Include <time.h> for
	time_t.

	* login/pty.h: Include <ioctl-types.h> for definition of struct
	winsize.

	* misc/regexp.h (compile): Correct typo.

	* argp/argp.h: Put extern before __const in defintion of
	argp_program_bug_address.

1997-05-29 00:20  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/wordsize-32/inttypes.h: Correct names of unsigned fast
	and least types.  Correct names of ?INT_FAST*_{MIN,MAX} macros.
	* sysdeps/wordsize-64/inttypes.h: Likewise.
	Reported by Andreas Jaeger <aj@arthur.rhein-neckar.de>.

1997-05-28 22:51  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/unix/Makefile (make-ioctls-CFLAGS): Use generic
	ttydefaults.h file instead of non-existing version in termios/sys.
	Reported by Zack Weinberg <zack@rabi.phys.columbia.edu>.

	* time/strptime.c (strptime_internal, case 'Y'): Restrict year
	number to four digits and to representable range for 4 byte time_t
	values.
	Patch by H.J. Lu <hjl@lucon.org>.

1997-05-28 18:19  Philip Blundell  <pjb27@cam.ac.uk>

	* posix/execl.c: Include <alloca.h> to avoid warning.

1997-05-27 18:19  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* math/libm-test.c: Implement testing of inlined functions, make
	output nicer, update comments.

	* math/test-idouble.c: New file.  Frontend for double tests of
	inlined functions.
	* math/test-ildoubl.c: New file.  Frontend for long double tests of
	inlined functions.
	* math/test-ifloat.c: New file.  Frontend for float tests of
	inlined functions.

	* math/test-longdouble.c: Rename to...
	* math/test-ldouble.c: ...this.

	* math/Makefile: Add rules for new test programs, change rules for
	renaming of longdouble test.

1997-05-20 15:50  H.J. Lu  <hjl@gnu.ai.mit.edu>

	* sunrpc/rpc/svc.h (__dispatch_fn_t): New.
	(svc_register): Use __dispatch_fn_t in prototype.

1997-05-28 17:02  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/generic/bzero.c (bzero): Fix typo.
	Patch by Witek Wnuk <spider@pest.waw.ids.edu.pl>.

1997-05-27 12:00  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* sysdeps/generic/vtimes.c: Use ISO C declaration style.

	* sysdeps/unix/bsd/ualarm.c: Include <unistd.h> for prototype.

	* sysdeps/generic/memccpy.c: Include <string.h> for prototype.

	* signal/tst-signal.c (handler): Correct function declaration to
	avoid warning.
	* stdlib/testsort.c (compare): Likewise.
	* string/tester.c: Likewise.

1997-05-27 14:16  Miles Bader  <miles@gnu.ai.mit.edu>

	* argp-help.c (argp_args_usage): Supply correct argp to filter_doc.

1997-05-27 17:51  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* db/hash/extern.h, db/hash/hash.c, db/hash/hash.h,
	db/hash/hash_log2.c: Rename __log2 to __hash_log2 to avoid clash
	with libm.

1997-05-27 14:47  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/m68k/fpu/e_atan2.c: Fix missing negate.  Use __m81_test
	instead of explicit comparisons.

1997-05-26 18:36  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* inet/netinet/icmp6.h: Remove use of <asm/bitops.h> which has no
	place in a generic header and is no user include file.

1 files changed, 50 insertions, 32 deletions

diff --git a/login/utmp_file.c b/login/utmp_file.c
index 9a5d687291..1366f38d75 100644
--- a/login/utmp_file.c
+++ b/login/utmp_file.c
@@ -31,12 +31,11 @@
 
 #include "utmp-private.h"
 
+#ifndef _LIBC
+#define _(msg) (msg)
+#define __set_errno(val) errno = (val)
+#endif
 
-/* This is the default name.  */
-static const char default_file_name[] = _PATH_UTMP;
-
-/* Current file name.  */
-static const char *file_name = (const char *) default_file_name;
 
 /* Descriptor for the file and position.  */
 static int file_fd = INT_MIN;
@@ -44,6 +43,7 @@ static off_t file_offset;
 
 static struct utmp last_entry;
 
+
 /* Functions defined here.  */
 static int setutent_file (int reset);
 static int getutent_r_file (struct utmp *buffer, struct utmp **result);
@@ -53,8 +53,7 @@ static int getutline_r_file (const struct utmp *key, struct utmp *buffer,
 			     struct utmp **result);
 static struct utmp *pututline_file (const struct utmp *data);
 static void endutent_file (void);
-static int utmpname_file (const char *name);
-
+static int updwtmp_file (const char *file, const struct utmp *utmp);
 
 /* Jump table for file functions.  */
 struct utfuncs __libc_utmp_file_functions =
@@ -65,7 +64,7 @@ struct utfuncs __libc_utmp_file_functions =
   getutline_r_file,
   pututline_file,
   endutent_file,
-  utmpname_file
+  updwtmp_file
 };
 
 
@@ -74,11 +73,11 @@ setutent_file (int reset)
 {
   if (file_fd == INT_MIN)
     {
-      file_fd = open (file_name, O_RDWR);
+      file_fd = open (__libc_utmp_file_name, O_RDWR);
       if (file_fd == -1)
 	{
 	  /* Hhm, read-write access did not work.  Try read-only.  */
-	  file_fd = open (file_name, O_RDONLY);
+	  file_fd = open (__libc_utmp_file_name, O_RDONLY);
 	  if (file_fd == -1)
 	    {
 	      perror (_("while opening UTMP file"));
@@ -231,9 +230,7 @@ proc_utmp_eq (const struct utmp *entry, const struct utmp *match)
      &&
 #endif
 #if _HAVE_UT_ID - 0
-     (entry->ut_id[0] && match->ut_id[0]
-      ? strncmp (entry->ut_id, match->ut_id, sizeof match->ut_id) == 0
-      : strncmp (entry->ut_line, match->ut_line, sizeof match->ut_line) == 0)
+     strncmp (entry->ut_id, match->ut_id, sizeof match->ut_id) == 0
 #else
      strncmp (entry->ut_line, match->ut_line, sizeof match->ut_line) == 0
 #endif
@@ -404,29 +401,50 @@ pututline_file (const struct utmp *data)
 
 
 static int
-utmpname_file (const char *name)
+updwtmp_file (const char *file, const struct utmp *utmp)
 {
-  if (strcmp (name, file_name) != 0)
+  int result = -1;
+  struct stat st;
+  ssize_t nbytes;
+  int fd;
+  
+  /* Open WTMP file.  */
+  fd = __open (file, O_WRONLY | O_APPEND);
+  if (fd < 0)
+    return -1;
+
+  /* Try to lock the file.  */
+  if (__flock (fd, LOCK_EX | LOCK_NB) < 0 && errno != ENOSYS)
     {
-      if (strcmp (name, default_file_name) == 0)
-	{
-	  if (file_name != default_file_name)
-	    free ((char *) file_name);
+      /* Oh, oh.  The file is already locked.  Wait a bit and try again.  */
+      sleep (1);
 
-	  file_name = default_file_name;
-	}
-      else
-	{
-	  char *new_name = __strdup (name);
-	  if (new_name == NULL)
-	    /* Out of memory.  */
-	    return -1;
+      /*  This time we ignore the error.  */
+      __flock (fd, LOCK_EX | LOCK_NB);
+    }
 
-	  if (file_name != default_file_name)
-	    free ((char *) file_name);
+  /* Remember original size of log file.  */
+  if (__fstat (fd, &st) < 0)
+    goto fail;
 
-	  file_name = new_name;
-	}
+  /* Write the entry.  If we can't write all the bytes, reset the file
+     size back to the original size.  That way, no partial entries
+     will remain.  */
+  nbytes = __write (fd, utmp, sizeof (struct utmp));
+  if (nbytes != sizeof (struct utmp))
+    {
+      ftruncate (fd, st.st_size);
+      goto fail;
     }
-  return 0;
+
+  result = 0;
+  
+fail:
+  /* And unlock the file.  */
+  __flock (fd, LOCK_UN);
+
+  /* Close WTMP file.  */
+  __close (fd);
+
+  return result;
 }