Use file locking similar to vi.

PR:		15330
Submitted by:	Oliver Breuninger <ob@seicom.net>

3 files changed, 99 insertions, 77 deletions

diff --git a/editors/joe2/files/patch-ab b/editors/joe2/files/patch-ab
index 8268c6c9d4a7..7d9fed0e9226 100644
--- a/editors/joe2/files/patch-ab
+++ b/editors/joe2/files/patch-ab
@@ -1,63 +1,37 @@
-*** main.c.old	Sun Jan 22 03:21:08 1995
---- main.c	Tue Oct 15 16:54:32 1996
-***************
-*** 18,23 ****
---- 18,27 ----
-  
-  #include <stdio.h>
-  #include <fcntl.h>
-+ #ifdef __FreeBSD__
-+ #include <locale.h>
-+ #include <ctype.h>
-+ #endif
-  #include "config.h"
-  #include "w.h"
-  #include "tty.h"
-***************
-*** 186,191 ****
---- 190,209 ----
-  #else
-   run=namprt(argv[0]);
-  #endif 
-+ 
-+ #ifdef __FreeBSD__
-+  setlocale(LC_ALL, "");
-+  for(c=0;c<256;c++)
-+   { int a=0;
-+     if(iscntrl(c))
-+      a|=UNDERLINE;
-+     if((c&0x80)&&!isprint(c))
-+      a|=INVERSE;
-+     xlata[c]=a;
-+     if(isprint(c))
-+      xlatc[c]=c;
-+   }
-+ #endif
-  
-   if(s=getenv("LINES")) sscanf(s,"%d",&lines);
-   if(s=getenv("COLUMNS")) sscanf(s,"%d",&columns);
-*** scrn.h.old	Thu Oct  6 10:09:04 1994
---- scrn.h	Tue Oct 15 16:42:29 1996
-***************
-*** 254,263 ****
-  
-  #define xlat(a,c) \
-    ( \
-!   (dspasis && ((unsigned)(c)>=128)) ? \
-        ((a)=0) \
-      : \
-!       (((a)=xlata[(unsigned)(c)]), ((c)=xlatc[(unsigned)(c)])) \
-    )
-  
-  /* int eraeol(SCRN *t,int x,int y);
---- 254,263 ----
-  
-  #define xlat(a,c) \
-    ( \
-!   (dspasis && ((unsigned char)(c)>=128)) ? \
-        ((a)=0) \
-      : \
-!       (((a)=xlata[(unsigned char)(c)]), ((c)=xlatc[(unsigned char)(c)])) \
-    )
-  
-  /* int eraeol(SCRN *t,int x,int y);
+--- main.c.orig	Sun Jan 22 01:21:08 1995
++++ main.c	Tue Dec  7 13:57:42 1999
+@@ -19,4 +19,8 @@
+ #include <stdio.h>
+ #include <fcntl.h>
++#ifdef __FreeBSD__
++#include <locale.h>
++#include <ctype.h>
++#endif
+ #include "config.h"
+ #include "w.h"
+@@ -188,4 +192,18 @@
+ #endif 
+ 
++#ifdef __FreeBSD__
++ setlocale(LC_ALL, "");
++ for(c=0;c<256;c++)
++  { int a=0;
++    if(iscntrl(c))
++     a|=UNDERLINE;
++    if((c&0x80)&&!isprint(c))
++     a|=INVERSE;
++    xlata[c]=a;
++    if(isprint(c))
++     xlatc[c]=c;
++  }
++#endif
++
+  if(s=getenv("LINES")) sscanf(s,"%d",&lines);
+  if(s=getenv("COLUMNS")) sscanf(s,"%d",&columns);
+@@ -366,5 +384,5 @@
+  if(help) helpon(maint);
+  if(!nonotice)
+-  msgnw(lastw(maint)->object,"\\i** Joe's Own Editor v2.8 ** Copyright (C) 1995 Joseph H. Allen **\\i");
++  msgnw(lastw(maint)->object,"\\i** Joe's Own Editor v2.8l ** Copyright (C) 1995 Joseph H. Allen **\\i");
+  edloop(0);
+  vclose(vmem);
diff --git a/editors/joe2/files/patch-ad b/editors/joe2/files/patch-ad
index a199b2b076d5..258c8c2c2a31 100644
--- a/editors/joe2/files/patch-ad
+++ b/editors/joe2/files/patch-ad
@@ -1,18 +1,58 @@
---- b.c        Fri Jan 20 03:38:25 1995
-+++ b.c.new    Fri Jul 23 03:36:10 1999
-@@ -21,6 +21,7 @@
- #include <pwd.h>
+--- b.c.orig	Fri Jan 20 09:38:25 1995
++++ b.c	Tue Dec  7 13:35:11 1999
+@@ -22,4 +22,7 @@
  #endif
  #include <errno.h>
++#include <sys/file.h>
 +#include <sys/types.h>
-
++#include <sys/stat.h>
+ 
  #include "config.h"
- #include "blocks.h"
-@@ -1990,6 +1991,7 @@
-  {
-  long tim=time(0);
-  B *b;
-+ mode_t mask=umask(077); /* no access to DEADJOE for others */
-  FILE *f=fopen("DEADJOE","a");
-  fprintf(f,"\n*** Modified files in JOE when it aborted on %s",ctime(&tim));
-  if(sig) fprintf(f,"*** JOE was aborted by signal %d\n",sig);
+@@ -202,4 +205,5 @@
+  else b->o=pdefault;
+  mset(b->marks,0,sizeof(b->marks));
++ b->filehandle = -1;	/* initialize filehandle &&& ob */
+  b->rdonly=0;
+  b->orphan=0;
+@@ -256,4 +260,8 @@
+  if(b && !--b->count)
+   {
++  if (b->filehandle != -1) {
++    /* close filehandle, free lock &&& ob */
++    close (b->filehandle);
++    }
+   if(b->changed) abrerr(b->name);
+   if(b==errbuf) errbuf=0;
+@@ -1672,4 +1680,5 @@
+  long skip,amnt;
+  char *n;
++ struct stat sb;
+  int nowrite=0;
+ 
+@@ -1705,4 +1714,26 @@
+   fi=fopen(n,"r");
+   if(!fi) nowrite=0;
++/*printf ("nowrite open=%i\n", nowrite); */
++  
++  /* check file mod, if no write flags set, 
++     joe in read only mode. &&& ob */
++
++  if (!nowrite) { 
++    nowrite = (!stat (n, &sb)) && (!(sb.st_mode & (S_IWUSR | S_IWGRP | S_IWOTH)));
++    }
++/*printf ("nowrite stat=%i\n", nowrite); */
++
++  /* lock the file if writable, or go into read only mode if
++     already locked,      */
++  
++  if ((fi) && (!nowrite)) { 
++    b->filehandle = dup (fileno (fi));
++    nowrite = (flock (b->filehandle, LOCK_EX | LOCK_NB));
++    }
++/*printf ("nowrite flock=%i\n", nowrite); */
++
++/*nowrite = 1; */	/* for test purpose */
++/*printf ("nowrite=%i\n", nowrite); */
++
+   }
+  joesep(n);
diff --git a/editors/joe2/files/patch-ae b/editors/joe2/files/patch-ae
new file mode 100644
index 000000000000..4f01692773cc
--- /dev/null
+++ b/editors/joe2/files/patch-ae
@@ -0,0 +1,8 @@
+--- b.h.orig	Wed Dec 21 13:04:46 1994
++++ b.h	Tue Dec  7 13:35:11 1999
+@@ -61,4 +61,5 @@
+  int internal;			/* Set for internal buffers */
+  int er;			/* Error code when file was loaded */
++ int filehandle;		/* File handle for locking */
+  };
+