Escaping backquote in filenames

[Julien Biard]

Hi,

I would like to execute call system on a filename with a backquote (`),
but I don't know how to escape it.

-> ls "[Shawn Lee]/10. Shawn Lee\`s Ping Pong Orchestra - Bollywood.mp3"
-rw-r--r-- 1 hobs medias 3,0M 2009-01-18 15:16 [Shawn Lee]/10. Shawn
Lee`s Ping Pong Orchestra - Bollywood.mp3

s = "[Shawn Lee]/10. Shawn Lee`s Ping Pong Orchestra - Bollywood.mp3" => "[Shawn Lee]/10. Shawn Lee`s Ping Pong Orchestra - Bollywood.mp3"
`ls "#{s}"`

sh: -c: line 0: unexpected EOF while looking for matching ``'
sh: -c: line 1: syntax error: unexpected end of file

s2 = "[Shawn Lee]/10. Shawn Lee\`s Ping Pong Orchestra - Bollywood.mp3" => "[Shawn Lee]/10. Shawn Lee`s Ping Pong Orchestra - Bollywood.mp3"
`ls "#{s2}"`

sh: -c: line 0: unexpected EOF while looking for matching ``'
sh: -c: line 1: syntax error: unexpected end of file

s3 = "[Shawn Lee]/10. Shawn Lee\\`s Ping Pong Orchestra - Bollywood.mp3" => "[Shawn Lee]/10. Shawn Lee\\`s Ping Pong Orchestra - Bollywood.mp3"
`ls "#{s3}"`

ls: cannot access [Shawn Lee]/10. Shawn Lee`s Ping Pong Orchestra -
Bollywood.mp3: No such file or directory

Any idea ?


Regards,


Julien

 

[Nobuyoshi Nakada]

Hi,

At Thu, 22 Jan 2009 16:58:47 +0900,
Julien Biard wrote in [ruby-talk:325582]:

I would like to execute call system on a filename with a backquote (`),
but I don't know how to escape it.

Escaping depends on platforms.

-> ls "[Shawn Lee]/10. Shawn Lee\`s Ping Pong Orchestra - Bollywood.mp3"
-rw-r--r-- 1 hobs medias 3,0M 2009-01-18 15:16 [Shawn Lee]/10. Shawn
Lee`s Ping Pong Orchestra - Bollywood.mp3

s = "[Shawn Lee]/10. Shawn Lee`s Ping Pong Orchestra - Bollywood.mp3"

=> "[Shawn Lee]/10. Shawn Lee`s Ping Pong Orchestra - Bollywood.mp3"

In 1.8.7 or later, Shellwords.escape exists.

require 'shellwords'
`ls #{Shellwords.escape(s)}`

Or, multiple arugment #exec bypasses shell.

IO.popen("-") {|f| f or exec("ls", s); f.read}

In 1.9, IO.popen can handle an array argument.

IO.popen(["ls", s], &:read)

 

[Julien Biard]

Hi,

At Thu, 22 Jan 2009 16:58:47 +0900,
Julien Biard wrote in [ruby-talk:325582]:

I would like to execute call system on a filename with a backquote (`),
but I don't know how to escape it.

Escaping depends on platforms.

-> ls "[Shawn Lee]/10. Shawn Lee\`s Ping Pong Orchestra - Bollywood.mp3"
-rw-r--r-- 1 hobs medias 3,0M 2009-01-18 15:16 [Shawn Lee]/10. Shawn
Lee`s Ping Pong Orchestra - Bollywood.mp3

s = "[Shawn Lee]/10. Shawn Lee`s Ping Pong Orchestra - Bollywood.mp3"

=> "[Shawn Lee]/10. Shawn Lee`s Ping Pong Orchestra - Bollywood.mp3"

In 1.8.7 or later, Shellwords.escape exists.

require 'shellwords'
`ls #{Shellwords.escape(s)}`

I am using 1.8.6.

Or, multiple arugment #exec bypasses shell.

IO.popen("-") {|f| f or exec("ls", s); f.read}

Thanks, it works.

In 1.9, IO.popen can handle an array argument.

IO.popen(["ls", s], &:read)