[英]Getting `Can't exec "command"` error on zsh on alpine linux from inside a perl script
I've got a perl wrapper script for taskwarrior's task
command that runs perfectly fine on macos.我有一个用于 taskwarrior 的task
命令的 perl 包装器脚本,它在 macOS 上运行得很好。
I've ported it to a docker container running alpine.我已经将它移植到运行 alpine 的 docker 容器中。 When I run the script, I get this weird error:当我运行脚本时,我得到了这个奇怪的错误:
> # bin/task_wrapper.pl task list
Wrapper command: command task list
Can't exec "command": No such file or directory at bin/task_wrapper.pl line 61.
On my mac, it works just fine, no error.在我的 mac 上,它工作得很好,没有错误。
which command
reports: command: shell built-in command
on both mac and on docker alpine. which command
报告: command: shell built-in command
。
I can run command task list
directly from the command line in docker container and works fine.我可以直接从 docker 容器中的命令行运行command task list
并且工作正常。
Here's the whole script:这是整个脚本:
#! /usr/bin/env perl
use strict;
use warnings;
my $context;
my $runsub = shift @ARGV;
my @show_cmds = qw( done delete add modify );
{ no strict 'refs';
&${runsub}(@ARGV) if $runsub;
}
# my @tw_cmds = qw ( add annotate append calc config context count delete denotate done duplicate edit execute export help import log logo modify prepend purge start stop synchronize undo version );
my @descriptors = qw ( due: dep: depends: attribute: status: priority: pri: due: after: start: before: end: );
sub _parse {
my @bits = @_;
# find the first element that contains a command
my $count = 0;
my @ids;
my @rest = @bits;
foreach my $b (@bits) {
if ( $b =~ /([[a-f][0-9]]{8}),*/ ) {
push @ids, $1;
shift @rest;
next;
}
if ( $b =~ /(\d[\d\-]*),*/ ) {
push @ids, $1;
shift @rest;
next;
}
last;
}
return \@ids, \@rest;
}
sub task {
my $args = $_[0] || '';
my $filter = '';
my $subcmd = '';
if (ref $args) {
$filter = %$args{'filter'} || '';
$subcmd = %$args{'subcmd'} || '';
shift @_;
}
my @args = @_;
my @a = qw ( command task );
$context = $ENV{FLEXIBLE_CONTEXT} if !$context;
if ($context && $args ne 'sync') {
push @a, 'rc.context=' . $context;
}
if ($args =~ /sync/) {
exec 'command task sync';
} else {
print "Wrapper command: @a $filter $subcmd @args \n";
################ ERROR ON LINE BELOW
system("@a $filter $subcmd @args");
################
}
# show updated list of tasks
my $show;
$show = grep { $subcmd eq $_ } @show_cmds if $subcmd;
if ($show) {
my @sub_args;
push @sub_args, 'limit:3' if !$context;
push (@sub_args, '+st') if $context && $context !~ /\+sn|\+st/;
task ({}, @sub_args);
}
#print @a;
#print $ENV{FLEXIBLE_CONTEXT};
return;
}
sub ta {
task ({subcmd => 'add' }, @_ );
}
sub tm {
my ($ids, $rest) = _parse(@_);
task ({subcmd => 'modify', filter => "@$ids"}, @$rest);
}
# delete task
sub tdel {
my ($ids, $rest) = _parse(@_);
task ({subcmd => 'delete', filter => "@$ids"}, @$rest);
}
# done task
sub td {
task ('done', @_);
}
sub tl {
task ('next', "\\($ENV{'PU'} or +qst\\)", "-BLOCKED", @_);
}
sub tai {
task ('add', $ENV{'PU'}, 'due:1h', @_);
}
You say you're using zsh
, and zsh
does have a builtin named command
, but you're not using zsh
.您说您正在使用zsh
,并且zsh
确实有一个名为command
的内置命令,但您没有使用zsh
。 You're using /bin/sh
since你正在使用/bin/sh
因为
system( SHELL_CMD )
is effectively short for实际上是
system( '/bin/sh', '-c', SHELL_CMD )
(It's technically the value returned by perl -V:sh
, not /bin/sh
. But that value is /bin/sh
.) (从技术上讲,这是perl -V:sh
返回的值,而不是/bin/sh
。但该值是/bin/sh
。)
If you want to issue a zsh
command, you will need to run zsh
instead of /bin/sh
.如果要发出zsh
命令,则需要运行zsh
而不是/bin/sh
。
system( 'zsh', '-c', SHELL_CMD )
Note that "@a $filter $subcmd @args"
is not the proper way to build a shell command.请注意, "@a $filter $subcmd @args"
不是构建 shell 命令的正确方法。 It suffers from code injection bugs.它存在代码注入错误。 You should use String::ShellQuote 's shell_quote
.您应该使用String::ShellQuote的shell_quote
。
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