# ------------------------------------------------------------------------
Patch: arc521-linux.diff
For: arc 5.21e
From: Klaus Reimer <k@ailis.de>
Desc: Modifies the arc sources so they can be compiled on a modern linux
      system.
      
This patch modifies the sources of arc 5.21e so they can be compiled on
a modern linux system. But it doesn't fix the security problems so you
still have to live with the linker warnings.
# ------------------------------------------------------------------------  

diff -u arc.orig/arc.c arc/arc.c
--- arc.orig/arc.c	Thu Apr 25 11:00:47 2002
+++ arc/arc.c	Thu Apr 25 11:12:56 2002
@@ -101,6 +101,7 @@
 static char   **lst;		/* files list */
 static int	lnum;		/* length of files list */
 
+int
 main(num, arg)			/* system entry point */
 	int		num;	/* number of arguments */
 	char	       *arg[];	/* pointers to arguments */
diff -u arc.orig/arcdos.c arc/arcdos.c
--- arc.orig/arcdos.c	Thu Apr 25 11:00:47 2002
+++ arc/arcdos.c	Thu Apr 25 11:02:08 2002
@@ -32,12 +32,9 @@
 #include <sys/stat.h>
 #if	BSD
 #include <sys/time.h>
+#include <time.h>
 #else	
 #include <time.h>		/* Sys V. Bleah. */
-struct	timeval {
-	long	tv_sec;
-	long	tv_usec;
-};
 #endif	/* BSD vs SYSV */
 #endif
 
diff -u arc.orig/arcpack.c arc/arcpack.c
--- arc.orig/arcpack.c	Thu Apr 25 11:00:47 2002
+++ arc/arcpack.c	Thu Apr 25 11:02:08 2002
@@ -62,7 +62,7 @@
 	long		pred_sq(), head_sq(), huf_buf();	/* stuff for squeezing */
 	long		pred_cm();	/* dynamic crunching cleanup */
 	long		tloc, ftell();	/* start of output */
-	u_int		inbytes, pakbytes;
+	u_int		inbytes = 0, pakbytes = 0;
 
 	/* first pass - see which method is best */
 
diff -u arc.orig/arcrun.c arc/arcrun.c
--- arc.orig/arcrun.c	Thu Apr 25 11:00:47 2002
+++ arc/arcrun.c	Thu Apr 25 11:02:08 2002
@@ -19,6 +19,7 @@
  * Language: Computer Innovations Optimizing C86
  */
 #include <stdio.h>
+#include <unistd.h>
 #include "arc.h"
 
 VOID	rempath(), openarc(), closearc(), arcdie();
diff -u arc.orig/arcsvc.c arc/arcsvc.c
--- arc.orig/arcsvc.c	Thu Apr 25 11:00:47 2002
+++ arc/arcsvc.c	Thu Apr 25 11:02:08 2002
@@ -25,6 +25,8 @@
 VOID	arcdie(), setstamp();
 int	unlink();
 
+extern int move();
+
 VOID
 openarc(chg)			/* open archive */
 	int             chg;	/* true to open for changes */
diff -u arc.orig/arcunp.c arc/arcunp.c
--- arc.orig/arcunp.c	Thu Apr 25 11:00:47 2002
+++ arc/arcunp.c	Thu Apr 25 11:02:08 2002
@@ -25,6 +25,8 @@
 VOID	setcode(), init_usq(), init_ucr(), decomp();
 VOID	arcdie(), codebuf();
 
+extern int crcbuf();
+
 #include "proto.h"
 
 /* stuff for repeat unpacking */
diff -u arc.orig/marc.c arc/marc.c
--- arc.orig/marc.c	Thu Apr 25 11:00:47 2002
+++ arc/marc.c	Thu Apr 25 11:13:07 2002
@@ -23,6 +23,7 @@
 	 Computer Innovations Optimizing C86
 */
 #include <stdio.h>
+#include <string.h>
 #include "arc.h"
 
 #if	UNIX
diff -u arc.orig/tmclock.c arc/tmclock.c
--- arc.orig/tmclock.c	Thu Apr 25 11:00:47 2002
+++ arc/tmclock.c	Thu Apr 25 11:02:08 2002
@@ -16,6 +16,7 @@
 #define	CENTURY	19
 #if	BSD
 #include <sys/time.h>
+#include <time.h>
 #else
 #include <time.h>
 extern long	timezone;	/* should be in <time.h>, but isn't on Sun */