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Full Discussion: Variable scop ksh vs bash
Top Forums Shell Programming and Scripting Variable scop ksh vs bash Post 302932192 by Don Cragun on Monday 19th of January 2015 10:15:25 PM
Old 01-19-2015
Quote:
Originally Posted by sea
Also, for bash try any of these:

Code:
POSIX?  : cnt=$(( $cnt +1 ))
POSIX?  : cnt=$[ $cnt + 1 ]
C-style : ((cnt++))

hth

EDIT:
Also, there are way too many unrequired line-ending-semi-colons - C, php or java? Smilie
Piping looks properly for bash.
The current POSIX standards specify arithmetic expansions:
Code:
cnt=$(($cnt + 1))
      and
cnt=$((cnt + 1))

They do not specify cnt=$[ $cnt + 1 ].
There is a proposal to include ((cnt++)) in the next revision of the POSIX standards, but it isn't required yet.
 

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getusershell(3C)					   Standard C Library Functions 					  getusershell(3C)

NAME
getusershell, setusershell, endusershell - get legal user shells SYNOPSIS
#include <unistd.h> char *getusershell(void); void setusershell(void); void endusershell(void); DESCRIPTION
The getusershell() function returns a pointer to a legal user shell as defined by the system manager in the file /etc/shells. If /etc/shells does not exist, the following locations of the standard system shells are used in its place: /bin/bash /bin/csh /bin/jsh /bin/ksh /bin/ksh93 /bin/pfcsh /bin/pfksh /bin/pfsh /bin/sh /bin/tcsh /bin/zsh /sbin/jsh /sbin/pfsh /sbin/sh /usr/bin/bash /usr/bin/csh /usr/bin/jsh /usr/bin/ksh /usr/bin/ksh93 /usr/bin/pfcsh /usr/bin/pfksh /usr/bin/pfsh /usr/bin/sh /usr/bin/tcsh /usr/bin/zsh /usr/sfw/bin/zsh /usr/xpg4/bin/sh The getusershell() function opens the file /etc/shells, if it exists, and returns the next entry in the list of shells. The setusershell() function rewinds the file or the list. The endusershell() function closes the file, frees any memory used by getusershell() and setusershell(), and rewinds the file /etc/shells. RETURN VALUES
The getusershell() function returns a null pointer on EOF. BUGS
All information is contained in memory that may be freed with a call to endusershell(), so it must be copied if it is to be saved. NOTES
Restricted shells should not be listed in /etc/shells. SunOS 5.11 1 Nov 2007 getusershell(3C)
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