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Top Forums UNIX for Dummies Questions & Answers Checking the header and trailer for a given string and if not found, exit out of the Post 302144346 by jim mcnamara on Wednesday 7th of November 2007 03:50:14 PM
Old 11-07-2007
Code:
#!/bin/ksh
# $1 = input file
found=0

head -n 1 $1 | grep -q '^#bt'  && tail -n 1 $1 | grep -q '^#ed' && found=1

if [[ found -eq 0 ]] ; then
  exit 1
fi
echo "okay"

tested with this file:
Quote:
#bt header
data
data
data
#ed trailer
 

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ZGREP(1)						    BSD General Commands Manual 						  ZGREP(1)

NAME
zgrep, zegrep, zfgrep -- print lines matching a pattern in gzip-compressed files SYNOPSIS
zgrep [grep-flags] [--] pattern [files ...] zegrep [grep-flags] [--] pattern [file ...] zfgrep [grep-flags] [--] pattern [file ...] DESCRIPTION
zgrep runs grep(1) on files or stdin, if no files argument is given, after decompressing them with zcat(1). The grep-flags and pattern arguments are passed on to grep(1). If an -e flag is found in the grep-flags, zgrep will not look for a pattern argument. zegrep calls egrep(1), while zfgrep calls fgrep(1). EXIT STATUS
In case of missing arguments or missing pattern, 1 will be returned, otherwise 0. SEE ALSO
egrep(1), fgrep(1), grep(1), gzip(1), zcat(1) AUTHORS
Thomas Klausner <wiz@NetBSD.org> BSD
December 28, 2003 BSD
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