Re: SVGATextMode 1.8 /tmp race

[bmc () VISI NET (Ben Collins)]

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First off, savetextmode is NOT part of SVGATextMode, it is a script from
svgalib. I checked the savetextmode on my debian 2.0 system (svgalib
1.2.13):

[root@goodguy(11:10am)-~]%cat /usr/bin/savetextmode
#!/bin/sh

set -o noclobber

restoretextmode -w /dev/stdout > /tmp/textregs
restorefont -w /dev/stdout > /tmp/fontdata

The noclobber keeps it from overwriting any files. However, from the
origianl svgalib source the script looks like this:

[root@goodguy(11:13am)-~/svgalib-1.3.0/utils]%cat savetextmode
#!/bin/sh
restoretextmode -w /tmp/textregs
restorefont -w /tmp/fontdata

This WILL overwrite any files. So if you use the base svgalib, then
you have a problem. NOTE: The Debian package for svgalib 1.3 directs the
output to /etc/vga, so it is safe. I'm not sure if redhat has this changed
or not.

On Thu, 21 Oct 1999, Adrian Voinea wrote:

> Hello,
> savetextmode, a utility that comes with SVGATextMode 1.8, saves the text
> mode data in /tmp, in two files with the mode 644:
>
> [/tmp]
> root@Death# ls -lA
> total 1
> drwxrwxrwx   2 root     gods         1024 Sep 24  1998 .X11-unix/
>
> [/tmp]
> root@Death# savetextmode
> svgalib: Using S3 driver (Trio64, 4096K).
> svgalib: s3: chipsets newer than S3-864 is not supported well yet.
> svgalib: RAMDAC: Trio64: MCLK = 47.131 MHz
>
> [/tmp]
> root@Death# ls -lA
> total 35
> drwxrwxrwx   2 root     gods         1024 Sep 24  1998 .X11-unix/
> -rw-r--r--   1 root     gods        32768 Oct 21 22:56 fontdata
> -rw-r--r--   1 root     gods          385 Oct 21 22:56 textregs
- ------------------------------------------------
Ben Collins <b.m.collins () larc nasa gov>
UnixGroup Admin - NASA LaRC

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