vasilito
facf0c92e0
Red Bear OS is a full fork. All sources must be available from git clone with zero network access. Removed gitignore rules that excluded fetched source trees under recipes/*/source/, local/recipes/kde/*/source/, local/recipes/qt/*/source/, and vendor source trees. Build artifacts (target/, build/, source.tar, *.o, *.so) remain excluded. 127291 files added — kernel, relibc, base, bootloader, pkgar, all KDE/Qt frameworks, mesa, wayland, DRM drivers, and every other recipe source.
46 lines
1.9 KiB
Plaintext
46 lines
1.9 KiB
Plaintext
texinode(Command Execution)(Functions)(Redirection)(Top)
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chapter(Command Execution)
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ifzman(\
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sect(Command Execution)
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)\
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cindex(command execution)
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cindex(execution, of commands)
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cindex(command not found, handling of)
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findex(command_not_found_handler)
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If a command name contains no slashes, the shell attempts to locate
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it. If there exists a shell function by that name, the function
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is invoked as described in noderef(Functions). If there exists
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a shell builtin by that name, the builtin is invoked.
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vindex(path, use of)
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Otherwise, the shell searches each element of tt($path) for a
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directory containing an executable file by that name.
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If execution fails: an error message is printed, and one of the
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following values is returned.
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startsitem()
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sitem(127)(The search was unsuccessful. The error message is
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`tt(command not found:) var(cmd)'.)
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sitem(126)(The executable file has insufficient permissions, is a
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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
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manref(execve)(2).)
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endsitem()
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If execution fails because the file is not in executable format,
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and the file is not a directory, it is assumed to be a shell
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script. tt(/bin/sh) is spawned to execute it. If the program
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is a file beginning with `tt(#!)', the remainder of the first line
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specifies an interpreter for the program. The shell will
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execute the specified interpreter on operating systems that do
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not handle this executable format in the kernel.
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If no external command is found but a function tt(command_not_found_handler)
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exists the shell executes this function with all
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command line arguments. The return status of the function becomes the
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status of the command. Note that the handler is executed in a
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subshell forked to execute an external command, hence changes to
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directories, shell parameters, etc. have no effect on the main shell.
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