Open history files with a restrictive mode (user read/write only).

Open history files with a restrictive mode (user read/write only).
Do not read/write history files in '.' if $HOME is not set.

Apply by doing:
cd /usr/src
patch -p0 < 040_readline.patch

And rebuild binutils by doing:
cd /usr/src/gnu/usr.bin/binutils
make -f Makefile.bsd-wrapper obj
make -f Makefile.bsd-wrapper depend
make -f Makefile.bsd-wrapper
make -f Makefile.bsd-wrapper install

Index: gnu/usr.bin/binutils/readline/history.c
===================================================================
RCS file: /cvs/src/gnu/usr.bin/binutils/readline/history.c,v
retrieving revision 1.2
diff -u -r1.2 history.c
--- gnu/usr.bin/binutils/readline/history.c 1996/11/23 03:53:32 1.2
+++ gnu/usr.bin/binutils/readline/history.c 2001/03/18 01:17:12
@@ -464,7 +464,7 @@
home = getenv ("HOME");

if (!home)
- home = ".";
+ return (NULL);

return_val = (char *)xmalloc (2 + strlen (home) + strlen (".history"));

@@ -499,8 +499,10 @@
int file, current_line;
struct stat finfo;

- input = history_filename (filename);
- file = open (input, O_RDONLY, 0666);
+ if ((input = history_filename (filename)))
+ file = open (input, O_RDONLY, 0666);
+ else
+ file = -1;

if ((file < 0) ||
(stat (input, &finfo) == -1))
@@ -584,7 +586,7 @@
struct stat finfo;

filename = history_filename (fname);
- if (stat (filename, &finfo) == -1)
+ if (!filename || stat (filename, &finfo) == -1)
goto truncate_exit;

file = open (filename, O_RDONLY, 0666);
@@ -621,7 +623,7 @@
break;
}

- file = open (filename, O_WRONLY | O_TRUNC | O_CREAT, 0666);
+ file = open (filename, O_WRONLY | O_TRUNC | O_CREAT, 0600);
if (file == -1)
goto truncate_exit;

@@ -656,7 +658,7 @@
else
mode = O_WRONLY | O_APPEND;

- if ((file = open (output, mode, 0666)) == -1)
+ if (!output || (file = open (output, mode, 0600)) == -1)
{
if (output)
free (output);