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Full Discussion: To quote or not
Top Forums UNIX for Dummies Questions & Answers To quote or not Post 302844145 by Corona688 on Friday 16th of August 2013 04:37:03 PM
Old 08-16-2013
Quote:
Originally Posted by g.j.huebschman
I can also see that I don't understand the difference between the shell expanding the wildcards and the command expanding the wildcards.
When in doubt, see what it does when you feed it into echo. If anything gets changed, it's the shell that's doing it, not echo, because echo is stupid and dumb and translates nothing.

Code:
$ touch abcdefg # Create empty file
$ echo a* # Shell turns a* into abcdefg BEFORE echo is run
abcdefg

$ echo "a*" # Quotes prevent the shell from changing it
a*

$ rm abcdefg # Remove file, so its no longer found
$ echo a* # Since there are no files beginning with a, the shell leaves it as a*
a*

$


Last edited by Corona688; 08-16-2013 at 05:42 PM..
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echo(3XCURSES)						  X/Open Curses Library Functions					    echo(3XCURSES)

NAME
echo, noecho - enable/disable terminal echo SYNOPSIS
cc [ flag... ] file... -I /usr/xpg4/include -L /usr/xpg4/lib -R /usr/xpg4/lib -lcurses [ library... ] c89 [ flag... ] file... -lcurses [ library... ] #include <curses.h> int echo(void); int noecho(void); DESCRIPTION
The echo() function enables Echo mode for the current screen. The noecho() function disables Echo mode for the current screen. Initially, curses software echo mode is enabled and hardware echo mode of the tty driver is disabled. The echo() and noecho() functions control soft- ware echo only. Hardware echo must remain disabled for the duration of the application, else the behavior is undefined. RETURN VALUES
Upon successful completion, these functions return OK. Otherwise, they return ERR. ERRORS
No errors are defined. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |Unsafe | +-----------------------------+-----------------------------+ SEE ALSO
getch(3XCURSES), getstr(3XCURSES), initscr(3XCURSES), libcurses(3XCURSES), scanw(3XCURSES), attributes(5), standards(5) SunOS 5.11 5 Jun 2002 echo(3XCURSES)
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