how to test input variable is a string in a select loop Post: 302490437

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LEARN ABOUT SUNOS

which

which(1)							   User Commands							  which(1)

NAME

       which - locate a command; display its pathname or alias

SYNOPSIS

       which [filename...]

DESCRIPTION

       which  takes  a	list  of  names  and  looks for the files which would be executed had these names been given as commands. Each argument is
       expanded if it is aliased, and searched for along the user's path. Both aliases and path are taken from the user's .cshrc file.

FILES

       ~/.cshrc 	       source of aliases and path values

       /usr/bin/which

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       csh(1), attributes(5)

DIAGNOSTICS

       A diagnostic is given for names which are aliased to more than a single word, or if an executable file with the argument name was not found
       in the path.

NOTES

       which is not a shell built-in command; it is the UNIX command, /usr/bin/which

BUGS

       Only  aliases  and paths from ~/.cshrc are used; importing from the current environment is not attempted. Must be executed by csh(1), since
       only csh knows about aliases.

       To compensate for ~/.cshrc files in which aliases depend upon the prompt variable being set, which sets	this  variable	to  NULL.  If  the
       ~/.cshrc produces output or prompts for input when prompt is set, which may produce some strange results.

SunOS 5.10							    26 Sep 1992 							  which(1)