From be44f424d366f2b3ddcfd857763562c4a7e0580a Mon Sep 17 00:00:00 2001
From: Axel Beckert <abe@deuxchevaux.org>
Date: Wed, 5 Oct 2011 00:05:26 +0200
Subject: Imported Upstream version 4.1.0~20110819git450e8f3
---
logfile.h | 87 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 87 insertions(+)
create mode 100644 logfile.h
(limited to 'logfile.h')
diff --git a/logfile.h b/logfile.h
new file mode 100644
index 0000000..c588a32
--- /dev/null
+++ b/logfile.h
@@ -0,0 +1,87 @@
+/* Copyright (c) 2008, 2009
+ * Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
+ * Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
+ * Micah Cowan (micah@cowan.name)
+ * Sadrul Habib Chowdhury (sadrul@users.sourceforge.net)
+ * Copyright (c) 1993-2002, 2003, 2005, 2006, 2007
+ * Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
+ * Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
+ * Copyright (c) 1987 Oliver Laumann
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program (see the file COPYING); if not, see
+ * http://www.gnu.org/licenses/, or contact Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
+ *
+ ****************************************************************
+ * $Id$ GNU
+ */
+
+struct logfile
+{
+ struct logfile *next;
+ FILE *fp; /* a hopefully uniq filepointer to the log file */
+ char *name; /* the name. used to reopen, when stat fails. */
+ int opencount; /* synchronize logfopen() and logfclose() */
+ int writecount; /* increments at logfwrite(), counts write() and fflush() */
+ int flushcount; /* increments at logfflush(), zeroed at logfwrite() */
+ struct stat *st; /* how the file looks like */
+};
+
+/*
+ * open a logfile, The second argument must be NULL, when the named file
+ * is already a logfile or must be a appropriatly opened file pointer
+ * otherwise.
+ * example: l = logfopen(name, islogfile(name) : NULL ? fopen(name, "a"));
+ */
+struct logfile *logfopen __P((char *name, FILE *fp));
+
+/*
+ * lookup a logfile by name. This is useful, so that we can provide
+ * logfopen with a nonzero second argument, exactly when needed.
+ * islogfile(NULL); returns nonzero if there are any open logfiles at all.
+ */
+int islogfile __P((char *name));
+
+/*
+ * logfclose does free()
+ */
+int logfclose __P((struct logfile *));
+int logfwrite __P((struct logfile *, char *, int));
+
+/*
+ * logfflush should be called periodically. If no argument is passed,
+ * all logfiles are flushed, else the specified file
+ * the number of flushed filepointers is returned
+ */
+int logfflush __P((struct logfile *ifany));
+
+/*
+ * a reopen function may be registered here, in case you want to bring your
+ * own (more secure open), it may come along with a private data pointer.
+ * this function is called, whenever logfwrite/logfflush detect that the
+ * file has been (re)moved, truncated or changed by someone else.
+ * if you provide NULL as parameter to logreopen_register, the builtin
+ * reopen function will be reactivated.
+ */
+void logreopen_register __P((int (*fn) __P((char *, int, struct logfile *)) ));
+
+/*
+ * Your custom reopen function is required to reuse the exact
+ * filedescriptor.
+ * See logfile.c for further specs and an example.
+ *
+ * lf_move_fd may help you here, if you do not have dup2(2).
+ * It closes fd and opens wantfd to access whatever fd accessed.
+ */
+int lf_move_fd __P((int fd, int wantfd));
--
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