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rdoc udpate.

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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@20559 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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akr 2008-12-05 15:09:59 +00:00
parent d5d39dd3fe
commit 41a3fbff5f
1 changed files with 37 additions and 20 deletions
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57
process.c
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@ -1712,25 +1712,34 @@ rb_exec_arg_fixup(struct rb_exec_arg *e)
/* /*
* call-seq: * call-seq:
* exec([env,] command [, arg, ...] [,options]) * exec([env,] command... [,options])
* *
* Replaces the current process by running the given external _command_. * Replaces the current process by running the given external _command_.
* If optional arguments, sequence of +arg+, are not given, that argument is * _command..._ is one of following forms.
* taken as a line that is subject to shell expansion before being *
* executed. If one or more +arg+ given, they * commandline : command line string which is passed to a shell
* are passed as parameters to _command_ with no shell * cmdname, arg1, ... : command name and one or more arguments (no shell)
* expansion. If +command+ is a two-element array, the first * [cmdname, argv0], arg1, ... : command name and arguments including argv[0] (no shell)
* element is the command to be executed, and the second argument is *
* used as the <code>argv[0]</code> value, which may show up in process * If single string is given as the command,
* listings. In order to execute the command, one of the <code>exec(2)</code> * it is taken as a line that is subject to shell expansion before being executed.
*
* If two or more +string+ given,
* the first is taken as a command name and
* the rest are passed as parameters to command with no shell expansion.
*
* If a two-element array at the beginning of the command,
* the first element is the command to be executed,
* and the second argument is used as the <code>argv[0]</code> value,
* which may show up in process listings.
*
* In order to execute the command, one of the <code>exec(2)</code>
* system calls is used, so the running command may inherit some of the environment * system calls is used, so the running command may inherit some of the environment
* of the original program (including open file descriptors). * of the original program (including open file descriptors).
* * This behavior is modified by env and options.
* The hash arguments, env and options, are same as
* <code>system</code> and <code>spawn</code>.
* See <code>spawn</code> for details. * See <code>spawn</code> for details.
* *
* Raises SystemCallError if the _command_ couldn't execute (typically * Raises SystemCallError if the command couldn't execute (typically
* <code>Errno::ENOENT</code> when it was not found). * <code>Errno::ENOENT</code> when it was not found).
* *
* exec "echo *" # echoes list of files in current directory * exec "echo *" # echoes list of files in current directory
@ -2770,17 +2779,25 @@ rb_spawn(int argc, VALUE *argv)
/* /*
* call-seq: * call-seq:
* system([env,] cmd [, arg, ...] [,options]) => true, false or nil * system([env,] command... [,options]) => true, false or nil
* *
* Executes _cmd_ in a subshell, returning +true+ if the command * Executes _command..._ in a subshell.
* gives zero exit status, +false+ for non zero exit status. Returns * _command..._ is one of following forms.
* +nil+ if command execution fails. An error status is available in *
* <code>$?</code>. The arguments are processed in the same way as * commandline : command line string which is passed to a shell
* for <code>Kernel::exec</code>. * cmdname, arg1, ... : command name and one or more arguments (no shell)
* [cmdname, argv0], arg1, ... : command name and arguments including argv[0] (no shell)
*
* system returns +true+ if the command gives zero exit status,
* +false+ for non zero exit status.
* Returns +nil+ if command execution fails.
* An error status is available in <code>$?</code>.
* The arguments are processed in the same way as
* for <code>Kernel.spawn</code>.
* *
* The hash arguments, env and options, are same as * The hash arguments, env and options, are same as
* <code>exec</code> and <code>spawn</code>. * <code>exec</code> and <code>spawn</code>.
* See <code>spawn</code> for details. * See <code>Kernel.spawn</code> for details.
* *
* system("echo *") * system("echo *")
* system("echo", "*") * system("echo", "*")