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我有一个 shell 脚本，它正在执行一个fuseIO基本上是 C 程序的程序。

这个想法是，这个可执行文件可能会在其中通过调用fuseIO抛出 a ，在这种情况下，while 循环应该退出。SIGABRTabort( )

如何做到这一点？

i=0
while [ $i != 10 ]
do
   echo "************ Iteration: $i *********\n" 2>&1 |tee -a log.txt
   ./fuseIO 2>&1 | tee -a log.txt // This may throw SIGABRT
   i=`expr $i + 1`
   sleep 1
done
4

1 回答 1

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In part, see Exit status codes greater than — possible? The WIFSIGNALED stuff tells you that a process was signalled, but there's a problem for the shell encoding that, and it does it by encoding a signalled exit status as 128 + signal number (129 for HUP, 130 for INT, etc). To demonstrate shell and signal exit statuses:

$ cat killme.sh
#!/bin/bash
kill ${1:-"-INT"} $$
$ ./killme.sh -HUP; echo $?
Hangup: 1
129
$ ./killme.sh -TERM; echo $?
Terminated: 15
143
$ ./killme.sh -QUIT; echo $?
0
$ ./killme.sh -PIPE; echo $?
141
$ ulimit -a
core file size          (blocks, -c) 0
...
$

This more or less justifies my '128+signum' claim (the -QUIT behaviour is unexpected, but explainable after a fashion — it normally dumps core, but didn't because ulimit has them disabled).

In bash, you can get 'a list of exit status values from the processes in the most-recently-executed foreground pipeline (which may contain only a single command)' via the array $PIPESTATUS. For example:

$ ./killme.sh | exit 31

$ echo ${PIPESTATUS[*]}
130 31
$

This corresponds to the 130 exit status for SIGINT (2) plus the explicit exit status 31. Note the notation: ${PIPESTATUS[0]} with the braces around the indexing. Double quotes and things work like $* vs $@ vs "$*" vs "$@" for getting all the values in the array.

Applied to your two-part pipeline, you should be able to test:

if [[ ${PIPESTATUS[0]} == 134 ]]
then : FuseIO crash with SIGABRT
fi

Without the | tee, you can simply test $?:

if [[ $? > 128 && $? < 160 ]]
then : died a signalled death (probably)
else : died an ordinary death
fi

The 160 here is also an informed guess; it should be 128+SIGRTMAX. Note that if a process does exit 135, it will be treated as if it was signalled (even if it does not).

于 2013-08-21T18:58:07.387 回答