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Full Discussion: Return vs. Echo
Top Forums Shell Programming and Scripting Return vs. Echo Post 302283648 by cfajohnson on Tuesday 3rd of February 2009 05:44:03 PM
Old 02-03-2009
There is no similarity between them: echo prints its arguments to stdout; return sets a return code which may be tested directly (by if or a control operator, && or ||) or indirectly in the contents of $?.
 

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LEARN ABOUT DEBIAN

m17ndebug

Debugging(3m17n)						 The m17n Library						  Debugging(3m17n)

NAME

       Debugging - Support for m17n library users to debug their programs.

   Functions
       MCharTable * mdebug_dump_chartab (MCharTable *table, int indent)
	   Dump a chartable.
       MFace * mdebug_dump_face (MFace *face, int indent)
	   Dump a face.
       MFont * mdebug_dump_font (MFont *font)
	   Dump a font.
       MFontset * mdebug_dump_fontset (MFontset *fontset, int indent)
	   Dump a fontset.
       MInputMethod * mdebug_dump_im (MInputMethod *im, int indent)
	   Dump an input method.
       int mdebug_hook ()
	   Hook function called on an error.
       MText * mdebug_dump_mtext (MText *mt, int indent, int fullp)
	   Dump an M-text.
       MPlist * mdebug_dump_plist (MPlist *plist, int indent)
	   Dump a property list.
       MSymbol mdebug_dump_symbol (MSymbol symbol, int indent)
	   Dump a symbol.
       MSymbol mdebug_dump_all_symbols (int indent)
	   Dump all symbol names.

Detailed Description
       Support for m17n library users to debug their programs.

       The m17n library provides the following facilities to support the library users to debug their programs.

       o Environment variables to control printing of various information to stderr.
	 o MDEBUG_INIT -- If set to 1, print information about the library initialization on the call of M17N_INIT().
	 o MDEBUG_FINI -- If set to 1, print counts of objects that are not yet freed on the call of M17N_FINI().
	 o MDEBUG_CHARSET -- If set to 1, print information about charsets being loaded from the m17n database.
	 o MDEBUG_CODING -- If set to 1, print information about coding systems being loaded from the m17n database.
	 o MDEBUG_DATABASE -- If set to 1, print information about data being loaded from the m17n database.
	 o MDEBUG_FONT -- If set to 1, print information about fonts being selected and opened.
	 o MDEBUG_FLT -- If set to 1, 2, or 3, print information about which command of Font Layout Table are being executed. The bigger number
	   prints the more detailed information.
	 o MDEBUG_INPUT -- If set to 1, print information about how an input method is running.
	 o MDEBUG_ALL -- Setting this variable to 1 is equivalent to setting all the above variables to 1.
	 o MDEBUG_OUTPUT_FILE -- If set to a file name, the above debugging information is appended to the file. If set to 'stdout', the
	   information is printed to stdout.
       o Functions to print various objects in a human readable way. See the documentation of mdebug_dump_XXXX() functions.
       o The hook function called on an error. See the documentation of mdebug_hook().
Author
       Generated automatically by Doxygen for The m17n Library from the source code.
COPYRIGHT

       Copyright (C) 2001 Information-technology Promotion Agency (IPA)
       Copyright (C) 2001-2011 National Institute of Advanced Industrial Science and Technology (AIST)
       Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License
       <http://www.gnu.org/licenses/fdl.html>.

Version 1.6.2							    12 Jan 2011 						  Debugging(3m17n)
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