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authorEric Andersen <andersen@codepoet.org>2001-05-08 19:58:20 (GMT)
committerEric Andersen <andersen@codepoet.org>2001-05-08 19:58:20 (GMT)
commita3e03be058a9b9a2caf36c5b18f66c0fc3df3bf0 (patch)
tree2ad333bd1e56590e981eba3c54f6057cbf5758bb /libutil/logwtmp.c
parent6c0899094d50e0d35d699594bfcd9cae4164abe2 (diff)
Add in libutil, based on Cory Visi's variant of Michael Shmulevich's libutil
port. I have reworked the code quite a bit so that the stuff that is supposed to be in libc is in libc, and I added a bunch of missing stuff so the libutil interface matches that of glibc's libutil. The only caveat is that libutil/login.c is currently a stub. -Erik
Diffstat (limited to 'libutil/logwtmp.c')
-rw-r--r--libutil/logwtmp.c73
1 files changed, 73 insertions, 0 deletions
diff --git a/libutil/logwtmp.c b/libutil/logwtmp.c
new file mode 100644
index 0000000..d8ee3da
--- /dev/null
+++ b/libutil/logwtmp.c
@@ -0,0 +1,73 @@
+/* Copyright (C) 1996, 1997 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <string.h>
+#include <sys/time.h>
+#include <time.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <utmp.h>
+
+
+void logwtmp (const char *line, const char *name, const char *host)
+{
+ struct utmp ut;
+ struct flock lock;
+ int ut_fd;
+
+
+ /* Set information in new entry. */
+ memset (&ut, 0, sizeof (ut));
+#if _HAVE_UT_PID - 0
+ ut.ut_pid = getpid ();
+#endif
+#if _HAVE_UT_TYPE - 0
+ ut.ut_type = name[0] ? USER_PROCESS : DEAD_PROCESS;
+#endif
+ strncpy (ut.ut_line, line, sizeof ut.ut_line);
+ strncpy (ut.ut_name, name, sizeof ut.ut_name);
+#if _HAVE_UT_HOST - 0
+ strncpy (ut.ut_host, host, sizeof ut.ut_host);
+#endif
+
+#if _HAVE_UT_TV - 0
+ __gettimeofday (&ut.ut_tv, NULL);
+#else
+ time (&ut.ut_time);
+#endif
+
+/* updwtmp (_PATH_WTMP, &ut); */
+/* from tinylogin */
+
+ if ((ut_fd = open(_PATH_WTMP, O_APPEND | O_WRONLY)) >= 0) {
+ /* Lock the utmp file before updating */
+ lock.l_type = F_WRLCK;
+ lock.l_whence = SEEK_SET;
+ lock.l_start = 0;
+ lock.l_len = 0;
+ if (fcntl(ut_fd, F_SETLK, &lock) >= 0) {
+ write(ut_fd, (void *) &ut, sizeof(ut));
+ /* Now unlock the utmp file */
+ lock.l_type = F_UNLCK;
+ }
+ close(ut_fd);
+ }
+
+
+}