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authorZbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>2014-08-02 11:12:21 -0400
committerZbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>2014-08-03 21:46:07 -0400
commit601185b43da638b1c74153deae01dbd518680889 (patch)
treeb4f1bc609e57e542a03ca00553098eabbb3b196b /CODING_STYLE
parent75cd513ef830d8e00d0d2d6a64917fec533315db (diff)
Unify parse_argv style
getopt is usually good at printing out a nice error message when commandline options are invalid. It distinguishes between an unknown option and a known option with a missing arg. It is better to let it do its job and not use opterr=0 unless we actually want to suppress messages. So remove opterr=0 in the few places where it wasn't really useful. When an error in options is encountered, we should not print a lengthy help() and overwhelm the user, when we know precisely what is wrong with the commandline. In addition, since help() prints to stdout, it should not be used except when requested with -h or --help. Also, simplify things here and there.
Diffstat (limited to 'CODING_STYLE')
-rw-r--r--CODING_STYLE5
1 files changed, 5 insertions, 0 deletions
diff --git a/CODING_STYLE b/CODING_STYLE
index e22c1edb12..ca3b5183f9 100644
--- a/CODING_STYLE
+++ b/CODING_STYLE
@@ -167,3 +167,8 @@
caching for any thread that is not the main thread. Use
is_main_thread() to detect whether the calling thread is the main
thread.
+
+- Option parsing:
+ - Do not print full help() on error, be specific about the error.
+ - Do not print messages to stdout on error.
+ - Do not POSIX_ME_HARDER unless necessary, i.e. avoid "+" in option string.