267 lines
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HTML
267 lines
12 KiB
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<!-- START doctoc generated TOC please keep comment here to allow auto update -->
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<!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
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<p><strong>Table of Contents</strong> <em>generated with <a href="https://github.com/thlorenz/doctoc">DocToc</a></em></p>
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<ul>
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<li><a href="#8-command-execution">8 Command Execution</a></li>
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</ul>
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<!-- END doctoc generated TOC please keep comment here to allow auto update -->
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<p><span id="Command-Execution"></span> <span
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id="Command-Execution-1"></span></p>
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<h1 id="8-command-execution"><a class="header" href="#8-command-execution">8 Command Execution</a></h1>
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<p><span id="index-command-execution"></span> <span
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id="index-execution_002c-of-commands"></span> <span
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id="index-command-not-found_002c-handling-of"></span> <span
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id="index-command_005fnot_005ffound_005fhandler"></span></p>
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<p>If a command name contains no slashes, the shell attempts to locate it.
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If there exists a shell function by that name, the function is invoked
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as described in <a href="Functions.html#Functions">Functions</a>. If there exists a
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shell builtin by that name, the builtin is invoked.</p>
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<p><span id="index-path_002c-use-of"></span></p>
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<p>Otherwise, the shell searches each element of $path for a</p>
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<p>If execution fails: an error message is printed, and one of the
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following values is returned.</p>
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<p>127</p>
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<p>The search was unsuccessful. The error message is ‘command not found:
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<code>cmd</code>’.</p>
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<p>126</p>
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<p>directory or special file, or is not a script and is in a format
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unrecognized by the operating system. The exact conditions and error
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message are operating system-dependent; see execve(2).</p>
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<p>and the file is not a directory, it is assumed to be a shell script.
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/bin/sh is spawned to execute it. If the program is a file beginning
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with ‘#!’, the remainder of the first line specifies an interpreter for
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the program. The shell will execute the specified interpreter on
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operating systems that do</p>
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<p>If no external command is found but a function command_not_found_handler
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exists the shell executes this function with all command line arguments.
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The return status of the function becomes the status of the command.
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Note that the handler is executed in a subshell forked to execute an
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external command, hence changes to directories, shell parameters, etc.
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have no effect on the main shell.</p>
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<hr />
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<p>This document was generated on <em>May 14, 2022</em> using <a href="http://www.nongnu.org/texi2html/"><em>texi2html
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5.0</em></a>.<br />
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Zsh version 5.9, released on May 14, 2022.</p>
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