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Top Forums Shell Programming and Scripting Which assignment syntax to use when? Post 302823767 by bakunin on Wednesday 19th of June 2013 08:56:37 PM
Old 06-19-2013
I suggest you read the man page of the shell which you didin't tell us any specifics about.

"export" is not an assignment, it just marks an already assigned vaiabl for export when a new shell environment is invoked.

"setenv" is a csh assignment command.

"set" in most cases (with the exception of "set --", which deletes positional variables in Bourne-shell descendants and "set -A" in ksh) just lists all the assigned variables, not assigns them.

I hope this helps.

bakunin
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times(1)                                                           User Commands                                                          times(1)

NAME
times - shell built-in function to report time usages of the current shell SYNOPSIS
sh times ksh times DESCRIPTION
sh Print the accumulated user and system times for processes run from the shell. ksh Print the accumulated user and system times for the shell and for processes run from the shell. On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways: 1. Variable assignment lists preceding the command remain in effect when the command completes. 2. I/O redirections are processed after variable assignments. 3. Errors cause a script that contains them to abort. 4. Words, following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a vari- able assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation are not performed. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
ksh(1), sh(1), time(1), attributes(5) SunOS 5.10 15 Apr 1994 times(1)
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