Le Tue, 28 Jan 2014 18:16:23 +0600 Марк Коренберг a écrit: > $ exec 9<no_such_file && echo TEST > dash: 1: cannot open no_such_file: No such file
As previously said, POSIX specifies that the built-in redirection errors cause the shell to exit. See: http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_20 http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_08_01 > $ exec 9<no_such_file || echo TEST > dash: 2: cannot open no_such_file: No such file > > So, I cannot test this operation without using $? You can use the file tests: if [ -f no_such_file -a -r no_such_file ]; then exec 9<no_such_file else echo TEST fi or a subshell: if ( exec 9<no_such_file ) 2>/dev/null; then exec 9<no_such_file else echo TEST fi ++ Seb. -- To unsubscribe from this list: send the line "unsubscribe dash" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
