annotate scripts/miscellaneous/ls.m @ 18990:b517b08d2e24

maint: Merge gui-release to default.
author Rik <rik@octave.org>
date Tue, 05 Aug 2014 17:53:36 -0700
parents 12d1297d3a38 0b657f4e7780
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1 ## Copyright (C) 2006-2013 John W. Eaton
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2 ##
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3 ## This file is part of Octave.
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4 ##
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5 ## Octave is free software; you can redistribute it and/or modify it
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6 ## under the terms of the GNU General Public License as published by
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7 ## the Free Software Foundation; either version 3 of the License, or (at
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8 ## your option) any later version.
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9 ##
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10 ## Octave is distributed in the hope that it will be useful, but
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 ## General Public License for more details.
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14 ##
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15 ## You should have received a copy of the GNU General Public License
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16 ## along with Octave; see the file COPYING. If not, see
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17 ## <http://www.gnu.org/licenses/>.
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18
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19 ## -*- texinfo -*-
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20 ## @deftypefn {Command} {} ls
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21 ## @deftypefnx {Command} {} ls filenames
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22 ## @deftypefnx {Command} {} ls options
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23 ## @deftypefnx {Command} {} ls options filenames
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24 ## List directory contents. For example:
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25 ##
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26 ## @example
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27 ## @group
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28 ## ls -l
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29 ## @print{} total 12
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30 ## @print{} -rw-r--r-- 1 jwe users 4488 Aug 19 04:02 foo.m
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31 ## @print{} -rw-r--r-- 1 jwe users 1315 Aug 17 23:14 bar.m
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32 ## @end group
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33 ## @end example
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34 ##
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35 ## The @code{dir} and @code{ls} commands are implemented by calling your
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36 ## system's directory listing command, so the available options will vary
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37 ## from system to system.
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38 ##
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39 ## Filenames are subject to shell expansion if they contain any wildcard
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40 ## characters @samp{*}, @samp{?}, @samp{[]}. If you want to find a
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41 ## literal example of a wildcard character you must escape it using the
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42 ## backslash operator @samp{\}.
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43 ## @seealso{dir, readdir, glob, what, stat, filesep, ls_command}
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44 ## @end deftypefn
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45
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46 ## Author: jwe
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47
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48 function retval = ls (varargin)
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49
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50 global __ls_command__;
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51
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52 if (isempty (__ls_command__) || ! ischar (__ls_command__))
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53 ## Initialize value for __ls_command__.
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54 ls_command ();
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55 endif
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56
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57 if (! iscellstr (varargin))
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58 error ("ls: all arguments must be character strings");
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59 endif
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60
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61 if (nargin > 0)
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62 args = tilde_expand (varargin);
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63 if (ispc () && ! isunix ())
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64 idx = ! strncmp (args, '/', 1);
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65 ## Enclose paths, potentially having spaces, in double quotes:
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66 args(idx) = strcat ('"', args(idx), '"');
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67 ## shell (cmd.exe) on MinGW uses '^' as escape character
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68 args = regexprep (args, '([^\w.*?])', '^$1');
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69 else
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70 ## Escape any special characters in filename
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71 args = regexprep (args, '([^][\w.*?-])', '\\$1');
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72 endif
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73 args = sprintf ("%s ", args{:});
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74 else
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75 args = "";
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76 endif
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77
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78 cmd = sprintf ("%s %s", __ls_command__, args);
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79
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80 if (page_screen_output () || nargout > 0)
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81 [status, output] = system (cmd);
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82
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83 if (status != 0)
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84 error ("ls: command exited abnormally with status %d\n", status);
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85 elseif (nargout == 0)
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86 puts (output);
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87 elseif (isempty (output))
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88 retval = "";
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89 else
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90 retval = strvcat (regexp (output, '\S+', 'match'){:});
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91 endif
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92 else
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93 ## Just let the output flow if the pager is off. That way the
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94 ## output from things like "ls -R /" will show up immediately and
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95 ## we won't have to buffer all the output.
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96 system (cmd);
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97 endif
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98
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99 endfunction
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100
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101
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102 %!test
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103 %! list = ls ();
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104 %! assert (ischar (list));
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105 %! assert (! isempty (list));
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106
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107 %!error ls (1)
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108