Last change
on this file since 3235 was 2725, checked in by Bruno Cornec, 14 years ago |
- Update mindi-busybox to 1.18.3 to avoid problems with the tar command which is now failing on recent versions with busybox 1.7.3
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-
Property svn:executable
set to
*
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File size:
1.0 KB
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1 | # UNFIXED BUG: hush thinks that ; && || & have the same precedence.
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2 | # According to this doc, && || have higher precedence than ; &.
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3 | # See example below.
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4 | # Precedence of ; is not a problem in practice. Precedence of & is.
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5 | #
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6 | #http://www.opengroup.org/onlinepubs/009695399/utilities/xcu_chap02.html
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7 | #
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8 | #2.9.3 Lists
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9 | #
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10 | #An AND-OR list is a sequence of one or more pipelines separated by
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11 | #the operators "&&" and "||" .
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12 | #
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13 | #A list is a sequence of one or more AND-OR lists separated by the operators
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14 | #';' and '&' and optionally terminated by ';', '&', or <newline>.
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15 | #
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16 | #The operators "&&" and "||" shall have equal precedence and shall be
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17 | #evaluated with left associativity. For example, both of the following
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18 | #commands write solely bar to standard output:
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19 | #
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20 | # false && echo foo || echo bar
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21 | # true || echo foo && echo bar
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22 | #
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23 | #A ';' or <newline> terminator shall cause the preceding AND-OR list
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24 | #to be executed sequentially; an '&' shall cause asynchronous execution
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25 | #of the preceding AND-OR list.
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26 |
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27 | echo First && sleep 0.2 && echo Third &
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28 | sleep 0.1
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29 | echo Second
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30 | wait
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31 | echo Done
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