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1 ## Copyright (C) 2006, 2007, 2008, 2009 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 ## @deffn {Command} ls options |
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21 ## List directory contents. For example, |
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22 ## |
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23 ## @example |
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24 ## ls -l |
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25 ## @print{} total 12 |
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26 ## @print{} -rw-r--r-- 1 jwe users 4488 Aug 19 04:02 foo.m |
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27 ## @print{} -rw-r--r-- 1 jwe users 1315 Aug 17 23:14 bar.m |
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28 ## @end example |
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29 ## |
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30 ## The @code{dir} and @code{ls} commands are implemented by calling your |
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31 ## system's directory listing command, so the available options may vary |
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32 ## from system to system. |
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33 ## @seealso{dir, stat, readdir, glob, filesep, ls_command} |
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34 ## @end deffn |
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35 |
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36 ## Author: jwe |
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37 |
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38 function retval = ls (varargin) |
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39 |
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40 global __ls_command__; |
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41 |
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42 if (isempty (__ls_command__) || ! ischar (__ls_command__)) |
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43 ## Initialize value for __ls_command__. |
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44 ls_command (); |
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45 endif |
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46 |
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47 if (iscellstr (varargin)) |
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48 |
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49 args = tilde_expand (varargin); |
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50 |
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51 cmd = sprintf ("%s ", __ls_command__, args{:}); |
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52 |
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53 if (page_screen_output () || nargout > 0) |
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54 |
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55 [status, output] = system (cmd); |
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56 |
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57 if (status == 0) |
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58 if (nargout == 0) |
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59 puts (output); |
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60 else |
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61 retval = strvcat (regexp (output, '[^\s]+', 'match'){:}); |
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62 endif |
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63 else |
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64 error ("ls: command exited abnormally with status %d", status); |
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65 endif |
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66 |
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67 else |
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68 ## Just let the output flow if the pager is off. That way the |
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69 ## output from things like "ls -R /" will show up immediately and |
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70 ## we won't have to buffer all the output. |
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71 system (cmd); |
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72 endif |
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73 |
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74 else |
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75 error ("ls: expecting all arguments to be character strings"); |
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76 endif |
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77 |
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78 endfunction |
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79 |
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80 %!error ls (1); |
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81 |
