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Top Forums Shell Programming and Scripting BASH arrays and variables of variables in C++ Post 302877458 by Akshay Hegde on Sunday 1st of December 2013 01:28:06 PM
Old 12-01-2013
@ wisecracker I think following problem he is facing, in preprocessor directives


Code:
$ cat test.cpp

// working
#define SHELLSCRIPT1 "\
#/bin/bash \n\
echo \"hello\" \n\
"

// Not working
#define test1 "\
#/bin/bash \n\
array=(a1 a2 a3) \n \
echo ${array[*]} \n \
"

#include <iostream>
#include <cstdlib>
using namespace std;
int main ()
{
// working
cout <<system(SHELLSCRIPT1);

// whereas this is not working
cout <<system(test1);

return 0;
}

$ g++ test.cpp

$ ./a.out 
hello
sh: 2: Syntax error: "(" unexpected

 

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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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