我有一个正在移植的应用程序,作为测试套件的一部分,我运行了sha1sum
。我希望测试代码可以在我的所有平台上运行,并且不会因平台而异。Mac OS X 是第一个没有sha1sum
应用程序的平台。不过我确实找到了一个shasum
应用程序。所以我创建了一个符号链接:
cd /usr/local/bin; ln -s /usr/bin/shasum sha1sum
但是,测试现在失败并出现 Perl 错误:
bash-3.2$ sha1sum -c files.sha1sum
perl version 5.16.2 can't run /usr/local/bin/sha1sum. Try the alternative(s):
(Error: no alternatives found)
Run "man perl" for more information about multiple version support in
Mac OS X.
bash-3.2$ shasum -c files.sha1sum
smallData.txt: OK
/usr/bin/shasum 的内容是:
#!/usr/bin/perl
=for comment
The contents of this script should normally never run! The perl wrapper
should pick the correct script in /usr/bin by appending the appropriate version.
You can try appending the appropriate perl version number. See perlmacosx.pod
for more information about multiple version support in Mac OS X.
=cut
use strict;
use Config ();
my @alt = grep {m,^$0\d+\.\d+(?:\.\d+)?$,} glob("$0*");
print STDERR <<"EOF-A";
perl version $Config::Config{version} can't run $0. Try the alternative(s):
EOF-A
if(scalar(@alt) > 0) {
for(@alt) {
my($ver) = /(\d+\.\d+(?:\.\d+)?)/;
print STDERR "$_ (uses perl $ver)\n";
}
} else {
print STDERR "(Error: no alternatives found)\n";
}
die <<'EOF-B';
Run "man perl" for more information about multiple version support in
Mac OS X.
EOF-B
我怎样才能sha1sum
在搜索路径中获得一个可以像shasum
它一样工作的可执行文件?
答案1
这shasum
只是v5.12 或shasum5.12
v5.16shasum5.16
的包装器。perl
perl
因此,将链接放在/usr/bin
(而不是/usr/local/bin
)中,并为其他两个特定版本创建链接,如下所示:
cd /usr/bin
ln -s shasum sha1sum
ln -s shasum5.12 sha1sum5.16
ln -s shasum5.16 sha1sum5.16
现在它可以工作了:
bash-3.2$ sha1sum -c files.sha1sum
smallData.txt: OK