ruby-dev

なかだです。

At Thu, 22 Sep 2005 15:42:08 +0900,
Tanaka Akira wrote in [ruby-dev:27283]:
> たとえば execlp, execvp の説明には
> 
>        The functions execlp and execvp will duplicate the actions of the shell
>        in searching for an executable file if the specified file name does not
>        contain a slash (/) character.  The search path is the  path  specified
>        in the environment by the PATH variable.  If this variable isn't speci-
>        fied, the default path ``:/bin:/usr/bin'' is used.  In  addition,  cer-
>        tain errors are treated specially.
> 
> というように :/bin:/usr/bin というのが使われるとあります。

先頭の:は最初にカレントディレクトリを探すということですか。

> 他にも、sh(1) や environ(5) にも説明があるかもしれません。
> 
> というわけで、デフォルトの値に入っているディレクトリに make があれば、
> 実行できると思います。

うーん、他のところでもいろいろ出てきそうな気はしますが。


Index: lib/mkmf.rb
===================================================================
RCS file: /cvs/ruby/src/ruby/lib/mkmf.rb,v
retrieving revision 1.228
diff -U2 -p -r1.228 mkmf.rb
--- lib/mkmf.rb	21 Sep 2005 14:31:07 -0000	1.228
+++ lib/mkmf.rb	22 Sep 2005 06:55:24 -0000
@@ -763,6 +763,14 @@ end
 
 def find_executable0(bin, path = nil)
-  path = (path || ENV['PATH']).split(File::PATH_SEPARATOR)
   ext = config_string('EXEEXT')
+  if File.expand_path(bin) == bin
+    return bin if File.executable?(bin)
+    return file if ext and File.executable?(file = bin + ext)
+  end
+  if path ||= ENV['PATH']
+    path = path.split(File::PATH_SEPARATOR)
+  else
+    path = %w[. /bin /usr/bin]
+  end
   file = nil
   path.each do |dir|
Index: ext/ripper/extconf.rb
===================================================================
RCS file: /cvs/ruby/src/ruby/ext/ripper/extconf.rb,v
retrieving revision 1.3
diff -U2 -p -r1.3 extconf.rb
--- ext/ripper/extconf.rb	15 Dec 2004 19:02:42 -0000	1.3
+++ ext/ripper/extconf.rb	22 Sep 2005 06:51:32 -0000
@@ -5,5 +5,5 @@ require 'rbconfig'
 
 def main
-  unless have_command('bison')
+  unless find_executable('bison')
     unless File.exist?('ripper.c') or File.exist?("#{$srcdir}/ripper.c")
       $stderr.puts 'missing bison; abort'
@@ -18,11 +18,3 @@ def main
 end
 
-def have_command(cmd)
-  checking_for(cmd) {
-    ENV['PATH'].split(File::PATH_SEPARATOR).any? {|path|
-      File.executable?("#{path}/#{cmd}#{Config::CONFIG['EXEEXT']}")
-    }
-  }
-end
-
 main


-- 
--- 僕の前にBugはない。
--- 僕の後ろにBugはできる。
    中田 伸悦

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[#26934] safe level preserved in method — nobuyoshi nakada <nobuyoshi.nakada@...>

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[#26942] core dump with ripper — Tanaka Akira <akr@...17n.org>

[#26944] string.c中の文字検索 — Tadashi Saito <shiba@...2.accsnet.ne.jp>

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[#26962] Re: about Ruby-GetText — Yukihiro Matsumoto <matz@...>

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[#26965] patch for RDoc about Module#class_variable_get — sheepman <sheepman@...>

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[#26975] [proposal] ANSI style function — "H.Yamamoto" <ocean@...2.ccsnet.ne.jp>

[#26984] elimination of "extern int errno;" — Takahiro Kambe <taca@...>

[#27044] test errors and failures — nobuyoshi nakada <nobuyoshi.nakada@...>

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[#27102] Re: Welcome to our (ruby developers list) You are added automatically — MIYAMUKO Katsuyuki <miyamuko@...>

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[#27139] ruby-1.8.3 status for release — Masayoshi Takahashi <maki@...>

[#27140] [PATCH] File#chown(nil, nil) — Minero Aoki <aamine@...>

[#27141] Interix3 (SFU)サポート — Takahiro Kambe <taca@...>

[#27145] test_fileutils fail — sheepman <sheepman@...>

[#27150] test_readline.rb blocks on NetBSD. — Tanaka Akira <akr@...17n.org>

[#27152] File.expand_path(Pathname.new("a")) — Tanaka Akira <akr@...17n.org>

[#27156] close error smashes an exception in a block — Tanaka Akira <akr@...17n.org>

[#27185] PIPE_BUF is not defined — "H.Yamamoto" <ocean@...2.ccsnet.ne.jp>

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[#27242] Ruby 1.8.3 released — Yukihiro Matsumoto <matz@...>

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[#27251] 脆弱性レポート翻訳者募集 — Yukihiro Matsumoto <matz@...>

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[#27318] Re: [ruby-cvs:15644] ruby, ruby/lib: * lib/optparse.rb (RequiredArgument#parse): not consume unmatched — "U.Nakamura" <usa@...>

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[ruby-dev:27284] Re: env -i make; fails.

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[#26935] send in lib — nobuyoshi nakada <nobuyoshi.nakada@...>