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Full Discussion: Using grep with test and without using [[ ]]
Top Forums Shell Programming and Scripting Using grep with test and without using [[ ]] Post 303029583 by disedorgue on Tuesday 29th of January 2019 08:28:01 AM
Old 01-29-2019
Hi, for fun:
( bash, ksh, zsh ):
Code:
if [ -n "${XX#-}" -a "${XX#-}" = "${XX##*[^0-9]}" ]
then 
  [ "${XX#-}" -eq 0 ] && echo "$XX: null" || { [ "${XX#-}" = "${XX}" ] && echo "$XX: positif" || echo "$XX: negatif" ;}
else
  echo "$XX: ko"
fi

dash:
Code:
if [ -n "${XX#-}" -a "${XX#-}" = "${XX##*[!0-9]}" ]
then 
     [ "${XX#-}" -eq 0 ] && echo "$XX: null" || { [ "${XX#-}" =  "${XX}" ] && echo "$XX: positif" || echo "$XX: negatif" ;}
else
  echo "$XX: ko"
fi

 

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LEARN ABOUT NETBSD

zfgrep

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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