Imported Upstream version 3.9.5upstream/3.9.5

1 files changed, 82 insertions, 0 deletions

diff --git a/logfile.h b/logfile.h
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+/* Copyright (c) 1993
+ *      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 2, 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, write to the
+ * Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA
+ *
+ ****************************************************************
+ * $Id: logfile.h,v 1.11 1994/05/31 12:33:27 jnweiger Exp $ FAU
+ */
+
+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));