83 lines
2.1 KiB
Bash
Executable File
83 lines
2.1 KiB
Bash
Executable File
#!/bin/sh
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#
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# Copyright 1997, Silicon Graphics, Inc.
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# ALL RIGHTS RESERVED
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#
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# UNPUBLISHED -- Rights reserved under the copyright laws of the United
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# States. Use of a copyright notice is precautionary only and does not
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# imply publication or disclosure.
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#
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# U.S. GOVERNMENT RESTRICTED RIGHTS LEGEND:
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# Use, duplication or disclosure by the Government is subject to restrictions
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# as set forth in FAR 52.227.19(c)(2) or subparagraph (c)(1)(ii) of the Rights
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# in Technical Data and Computer Software clause at DFARS 252.227-7013 and/or
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# in similar or successor clauses in the FAR, or the DOD or NASA FAR
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# Supplement. Contractor/manufacturer is Silicon Graphics, Inc.,
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# 2011 N. Shoreline Blvd. Mountain View, CA 94039-7311.
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#
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# THE CONTENT OF THIS WORK CONTAINS CONFIDENTIAL AND PROPRIETARY
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# INFORMATION OF SILICON GRAPHICS, INC. ANY DUPLICATION, MODIFICATION,
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# DISTRIBUTION, OR DISCLOSURE IN ANY FORM, IN WHOLE, OR IN PART, IS STRICTLY
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# PROHIBITED WITHOUT THE PRIOR EXPRESS WRITTEN PERMISSION OF SILICON
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# GRAPHICS, INC.
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#
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# Use the file "magic" in this directory to update /etc/magic
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#
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# $Id: update-magic,v 1.5 1999/04/26 23:33:29 kenmcd Exp $
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status=1 # presume failure
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tmp=/tmp/$$
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trap "rm -f $tmp.*; exit \$status" 0 1 2 3 15
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if [ ! -f /etc/magic ]
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then
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echo "$0: Error: cannot find /etc/magic: No such file or directory"
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exit
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fi
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if [ ! -w /etc/magic ]
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then
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echo "$0: Error: /etc/magic is not writeable"
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exit
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fi
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# build nawk script to cull old stuff from /etc/magic
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#
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rm -f $tmp.cut
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echo "# script for culling entries from /etc/magic" >$tmp.cut
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echo "# made by $0 on `date`" >>$tmp.cut
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grep '^#!cut' magic \
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for (i=4; i<=NF; i++) pat = pat " " $i
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printf "/%s/\t{ skip = 1; next }\n",pat
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}' >>$tmp.cut
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echo >>$tmp.cut '
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skip == 1 && /^[^>]/ { skip = 0 }
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skip == 0 { print }'
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# cut
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#
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nawk -f $tmp.cut /etc/magic >$tmp.magic
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# paste
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#
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grep -v '^#!' magic >>$tmp.magic
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# changes?
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#
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if cmp -s /etc/magic $tmp.magic
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then
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:
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else
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if [ ! -w /etc/magic ]
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then
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echo "$0: Error: cannot update /etc/magic: Permission denied"
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exit
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fi
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# install new /etc/magic
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#
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cp $tmp.magic /etc/magic
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fi
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status=0
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