On Mon, 16 Jun 2014, Kevin A. McGrail wrote:
BTW anyone know what set -ex does in practice in a shell script?
From the bash man page, in the discussion of "set":
-e Exit immediately if a pipeline (which may consist of a
single simple command), a subshell command enclosed in
parentheses, or one of the commands executed as part of
a command list enclosed by braces (see SHELL GRAMMAR
above) exits with a non-zero status. The shell does not
exit if the command that fails is part of the command
list immediately following a while or until keyword,
part of the test following the if or elif reserved
words, part of any command executed in a && or || list
except the command following the final && or ||, any
command in a pipeline but the last, or if the command's
return value is being inverted with !. A trap on ERR,
if set, is executed before the shell exits. This option
applies to the shell environment and each subshell envi-
ronment separately (see COMMAND EXECUTION ENVIRONMENT
above), and may cause subshells to exit before executing
all the commands in the subshell.
-x After expanding each simple command, for command, case
command, select command, or arithmetic for command, dis-
play the expanded value of PS4, followed by the command
and its expanded arguments or associated word list.
--
John Hardin KA7OHZ http://www.impsec.org/~jhardin/
[email protected] FALaholic #11174 pgpk -a [email protected]
key: 0xB8732E79 -- 2D8C 34F4 6411 F507 136C AF76 D822 E6E6 B873 2E79
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False is the idea of utility that sacrifices a thousand real
advantages for one imaginary or trifling inconvenience; that would
take fire from men because it burns, and water because one may drown
in it; that has no remedy for evils except destruction. The laws
that forbid the carrying of arms are laws of such a nature. They
disarm only those who are neither inclined nor determined to commit
crime. -- Cesare Beccaria, quoted by Thomas Jefferson
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