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Top Forums UNIX for Dummies Questions & Answers Difference between SET and SETENV Post 43063 by google on Monday 10th of November 2003 08:03:15 PM
Old 11-10-2003
I think that SETENV may be more of C-shell specific thing. According to O'Reilly, SETENV assigns a value to an environment variable. If no arguments are provided, then setenv will produce a list of all names and values in the current environment. The SET command, sets a variable equal to a value. With no arguments, it displays the names and values of all set variables.

C Shell, maintains a set of environment variables which are distinct from the shell variables and arent really part of the C shell. Shell variables are meaningful only within the current shell, but environement varialbes are automatically exported, making them available globally. C shell variables are only available to a particular script in which they are defined, where as environment variables can be used by any shell script, mail utility or editors that you may invoke. (OReilly, UNIX In A NutShell)

Korn/Bourne shells dont have the SETENV command (I dont think anyway)
 

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PCP.CONF(5)							File Formats Manual						       PCP.CONF(5)

NAME
pcp.conf - the Performance Co-Pilot configuration and environment file SYNOPSIS
/etc/pcp.conf DESCRIPTION
When using Performance Co-Pilot (PCP) tools and utilities and when calling PCP library functions, a standard set of environment variables are defined in /etc/pcp.conf. These variables are generally used to specify the location of various PCP pieces in the file system and may be loaded into shell scripts by sourcing the /etc/pcp.env(5) shell script and queried by C/C++ programs using the pmGetConfig(3) library function. If a variable is already defined in the environment, the values in pcp.conf do not override those values, i.e. the values in pcp.conf serve as installation defaults only. Both the pcp.env and pcp.conf files are expected to be found in /etc by default. If required, the pcp.conf file may be relocated and PCP_CONF set in the environment to specify the full path to the new location. The pcp.env file can not be relocated (this is the only hard coded path required by PCP). The syntax rules for pcp.conf are as follows : 1. the general syntax is PCP_VARIABLE_NAME=variable value to end of line 2. lines that begin with # and all blank lines are ignored. 3. all variables must be prefixed with PCP_. This is a security issue - variables that do not have this prefix will be silently ignored. 4. there should be no space between the variable name and the literal = and no space between the = and the variable value (unless the value actually starts with a space). This is required because the pcp.conf file may be sourced directly by Makefiles as well as inter- preted by the pcp.env script and the pmGetConfig function. 5. variable values may contain spaces and should not be quoted. The pcp.env script automatically quotes all variable values from the character immediately following the = through to the end of the line. For further details and an explanation of the use of each variable, see the comments in the /etc/pcp.conf file itself. ENVIRONMENT
The PCP_CONF environment variable specifies an alternative path to the pcp.conf file. SEE ALSO
PCPIntro(1), PCPIntro(3), PMAPI(3), pmGetConfig(3) and pcp.env(5). Performance Co-Pilot PCP PCP.CONF(5)
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