diff options
Diffstat (limited to 'shell/ash_test')
| -rw-r--r-- | shell/ash_test/ash-parsing/and_or_and_backgrounding.right | 4 | ||||
| -rwxr-xr-x | shell/ash_test/ash-parsing/and_or_and_backgrounding.tests | 31 |
2 files changed, 35 insertions, 0 deletions
diff --git a/shell/ash_test/ash-parsing/and_or_and_backgrounding.right b/shell/ash_test/ash-parsing/and_or_and_backgrounding.right new file mode 100644 index 0000000..90ce63e --- /dev/null +++ b/shell/ash_test/ash-parsing/and_or_and_backgrounding.right @@ -0,0 +1,4 @@ +First +Second +Third +Done diff --git a/shell/ash_test/ash-parsing/and_or_and_backgrounding.tests b/shell/ash_test/ash-parsing/and_or_and_backgrounding.tests new file mode 100755 index 0000000..05acfb8 --- /dev/null +++ b/shell/ash_test/ash-parsing/and_or_and_backgrounding.tests @@ -0,0 +1,31 @@ +# UNFIXED BUG: hush thinks that ; && || & have the same precedence. +# According to this doc, && || have higher precedence than ; &. +# See example below. +# Precedence of ; is not a problem in practice. Precedence of & is. +# +#http://www.opengroup.org/onlinepubs/009695399/utilities/xcu_chap02.html +# +#2.9.3 Lists +# +#An AND-OR list is a sequence of one or more pipelines separated by +#the operators "&&" and "||" . +# +#A list is a sequence of one or more AND-OR lists separated by the operators +#';' and '&' and optionally terminated by ';', '&', or <newline>. +# +#The operators "&&" and "||" shall have equal precedence and shall be +#evaluated with left associativity. For example, both of the following +#commands write solely bar to standard output: +# +# false && echo foo || echo bar +# true || echo foo && echo bar +# +#A ';' or <newline> terminator shall cause the preceding AND-OR list +#to be executed sequentially; an '&' shall cause asynchronous execution +#of the preceding AND-OR list. + +echo First && sleep 0.2 && echo Third & +sleep 0.1 +echo Second +wait +echo Done |