将 csh 脚本转换为 bash 脚本
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Convert csh script to bash script
提问by Harpal
I am currently converting a csh script on linux to a bash script on Mac OS X lion.
我目前正在将 linux 上的 csh 脚本转换为 Mac OS X lion 上的 bash 脚本。
The csh script looks like:
csh 脚本如下所示：
setenv CNS_SOLVE '/Users/ucbthsa/Documents/haddock2.1/software/bin/'
setenv CNS_SOLVE $CNS_SOLVE
if ( -d $CNS_SOLVE ) then
if ( ! $?CNS_ARCH ) setenv CNS_ARCH `$CNS_SOLVE/bin/getarch`
else
setenv CNS_ARCH 'unknown'
endif
My conversion to a Mac bash script looks as follows:
我转换为 Mac bash 脚本如下所示：
export CNS_SOLVE='/Users/ucbthsa/Documents/haddock2.1/software/bin/cns_solve_1.3'
export CNS_SOLVE=$CNS_SOLVE
if [ -d $CNS_SOLVE ]; then
if [ ! $?CNS_ARCH ]; then
export CNS_ARCH='$CNS_SOLVE/bin/getarch'
else
export CNS_ARCH='unknown'
endif
When I try and source the Mac bash script I get the following error:
当我尝试获取 Mac bash 脚本的源代码时，出现以下错误：
-bash: cns_solve_env: line 10: syntax error: unexpected end of file
-bash：cns_solve_env：第 10 行：语法错误：文件意外结束
I cannot understand why I am getting this error.
我不明白为什么我会收到这个错误。
回答by John Lawrence
You should use firather than endifand you aren't closing the first if at all:
如果有的话，您应该使用fi而不是endif并且您不会关闭第一个：
export CNS_SOLVE='/Users/ucbthsa/Documents/haddock2.1/software/bin/cns_solve_1.3'
export CNS_SOLVE=$CNS_SOLVE
if [ -d $CNS_SOLVE ]; then
if [ -z $CNS_ARCH ]; then
export CNS_ARCH="$CNS_SOLVE/bin/getarch"
fi
else
export CNS_ARCH='unknown'
fi
*edit: changed the second test, as William Pursell pointed out, it wouldn't work as it was in bash.
*编辑：改变了第二个测试，正如威廉珀塞尔指出的那样，它不会像在 bash 中那样工作。
回答by William Pursell
$?CNS_ARCHmeans something different in sh. Use:
$?CNS_ARCH在 sh 中意味着不同的东西。用：
test -z "$CNS_ARCH" && CNS_ARCH=$($CNS_SOLVE/bin/getarch)
or
或者
CNS_ARCH=${CNS_ARCH-$( $CNS_SOLVE/bin/getarch)}
Notice that these have slightly different meanings. The first is will assign to CNS_ARCH if CNS_ARCH is already set but is the empty string, while the second will not change CNS_ARCH if it is already set, but is empty, which is what the $?does in csh, but is probably not what you actually want.
请注意，这些含义略有不同。如果 CNS_ARCH 已经设置但为空字符串，第一个将分配给 CNS_ARCH，而如果 CNS_ARCH 已经设置但为空，则第二个不会更改 CNS_ARCH，这是$?在 csh 中所做的，但可能不是你实际的想。
