2012-03-27 23:13:14 +00:00
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/* Implementation of the CHMOD intrinsic.
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2019-06-02 15:48:37 +00:00
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Copyright (C) 2006-2019 Free Software Foundation, Inc.
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2012-03-27 23:13:14 +00:00
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Contributed by François-Xavier Coudert <coudert@clipper.ens.fr>
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This file is part of the GNU Fortran runtime library (libgfortran).
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Libgfortran is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public
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License as published by the Free Software Foundation; either
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version 3 of the License, or (at your option) any later version.
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Libgfortran is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#include "libgfortran.h"
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#if defined(HAVE_SYS_STAT_H)
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#include <sys/stat.h> /* For stat, chmod and umask. */
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/* INTEGER FUNCTION CHMOD (NAME, MODE)
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CHARACTER(len=*), INTENT(IN) :: NAME, MODE
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Sets the file permission "chmod" using a mode string.
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For MinGW, only _S_IWRITE and _S_IREAD are supported. To set those,
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only the user attributes are used.
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The mode string allows for the same arguments as POSIX's chmod utility.
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a) string containing an octal number.
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b) Comma separated list of clauses of the form:
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[<who-list>]<op>[<perm-list>|<permcopy>][<op>[<perm-list>|<permcopy>],...]
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<who> - 'u', 'g', 'o', 'a'
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<op> - '+', '-', '='
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<perm> - 'r', 'w', 'x', 'X', 's', t'
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If <op> is not followed by a perm-list or permcopy, '-' and '+' do not
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change the mode while '=' clears all file mode bits. 'u' stands for the
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user permissions, 'g' for the group and 'o' for the permissions for others.
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'a' is equivalent to 'ugo'. '+' sets the given permission in addition to
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the ones of the file, '-' unsets the given permissions of the file, while
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'=' sets the file to that mode. 'r' sets the read, 'w' the write, and
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'x' the execute mode. 'X' sets the execute bit if the file is a directory
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or if the user, group or other executable bit is set. 't' sets the sticky
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bit, 's' (un)sets the and/or S_ISUID/S_ISGID bit.
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Note that if <who> is omitted, the permissions are filtered by the umask.
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A return value of 0 indicates success, -1 an error of chmod() while 1
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indicates a mode parsing error. */
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2015-08-28 15:33:40 +00:00
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static int
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chmod_internal (char *file, char *mode, gfc_charlen_type mode_len)
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2012-03-27 23:13:14 +00:00
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{
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bool ugo[3];
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bool rwxXstugo[9];
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int set_mode, part;
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2014-09-21 17:33:12 +00:00
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bool honor_umask, continue_clause = false;
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#ifndef __MINGW32__
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bool is_dir;
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#endif
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2012-03-27 23:13:14 +00:00
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mode_t mode_mask, file_mode, new_mode;
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struct stat stat_buf;
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if (mode_len == 0)
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return 1;
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if (mode[0] >= '0' && mode[0] <= '9')
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{
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2014-09-21 17:33:12 +00:00
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unsigned fmode;
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if (sscanf (mode, "%o", &fmode) != 1)
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2012-03-27 23:13:14 +00:00
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return 1;
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2017-10-07 00:16:47 +00:00
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return chmod (file, (mode_t) fmode);
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2012-03-27 23:13:14 +00:00
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}
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/* Read the current file mode. */
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if (stat (file, &stat_buf))
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return 1;
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file_mode = stat_buf.st_mode & ~S_IFMT;
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2014-09-21 17:33:12 +00:00
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#ifndef __MINGW32__
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2012-03-27 23:13:14 +00:00
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is_dir = stat_buf.st_mode & S_IFDIR;
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2014-09-21 17:33:12 +00:00
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#endif
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2012-03-27 23:13:14 +00:00
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#ifdef HAVE_UMASK
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/* Obtain the umask without distroying the setting. */
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mode_mask = 0;
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mode_mask = umask (mode_mask);
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(void) umask (mode_mask);
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#else
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honor_umask = false;
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#endif
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2018-12-28 15:30:48 +00:00
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for (gfc_charlen_type i = 0; i < mode_len; i++)
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2012-03-27 23:13:14 +00:00
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{
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if (!continue_clause)
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{
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ugo[0] = false;
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ugo[1] = false;
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ugo[2] = false;
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#ifdef HAVE_UMASK
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honor_umask = true;
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#endif
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}
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continue_clause = false;
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rwxXstugo[0] = false;
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rwxXstugo[1] = false;
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rwxXstugo[2] = false;
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rwxXstugo[3] = false;
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rwxXstugo[4] = false;
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rwxXstugo[5] = false;
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rwxXstugo[6] = false;
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rwxXstugo[7] = false;
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rwxXstugo[8] = false;
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part = 0;
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set_mode = -1;
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for (; i < mode_len; i++)
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{
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switch (mode[i])
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{
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/* User setting: a[ll]/u[ser]/g[roup]/o[ther]. */
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case 'a':
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if (part > 1)
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return 1;
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ugo[0] = true;
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ugo[1] = true;
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ugo[2] = true;
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part = 1;
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#ifdef HAVE_UMASK
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honor_umask = false;
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#endif
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break;
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case 'u':
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if (part == 2)
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{
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rwxXstugo[6] = true;
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part = 4;
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break;
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}
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if (part > 1)
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return 1;
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ugo[0] = true;
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part = 1;
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#ifdef HAVE_UMASK
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honor_umask = false;
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#endif
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break;
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case 'g':
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if (part == 2)
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{
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rwxXstugo[7] = true;
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part = 4;
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break;
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}
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if (part > 1)
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return 1;
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ugo[1] = true;
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part = 1;
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#ifdef HAVE_UMASK
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honor_umask = false;
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#endif
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break;
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case 'o':
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if (part == 2)
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{
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rwxXstugo[8] = true;
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part = 4;
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break;
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}
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if (part > 1)
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return 1;
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ugo[2] = true;
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part = 1;
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#ifdef HAVE_UMASK
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honor_umask = false;
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#endif
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break;
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/* Mode setting: =+-. */
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case '=':
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if (part > 2)
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{
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continue_clause = true;
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i--;
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part = 2;
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goto clause_done;
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}
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set_mode = 1;
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part = 2;
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break;
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case '-':
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if (part > 2)
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{
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continue_clause = true;
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i--;
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part = 2;
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goto clause_done;
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}
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set_mode = 2;
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part = 2;
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break;
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case '+':
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if (part > 2)
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{
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continue_clause = true;
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i--;
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part = 2;
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goto clause_done;
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}
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set_mode = 3;
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part = 2;
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break;
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/* Permissions: rwxXst - for ugo see above. */
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case 'r':
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if (part != 2 && part != 3)
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return 1;
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rwxXstugo[0] = true;
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part = 3;
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break;
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case 'w':
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if (part != 2 && part != 3)
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return 1;
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rwxXstugo[1] = true;
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part = 3;
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break;
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case 'x':
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if (part != 2 && part != 3)
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return 1;
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rwxXstugo[2] = true;
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part = 3;
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break;
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case 'X':
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if (part != 2 && part != 3)
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return 1;
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rwxXstugo[3] = true;
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part = 3;
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break;
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case 's':
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if (part != 2 && part != 3)
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return 1;
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rwxXstugo[4] = true;
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part = 3;
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break;
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case 't':
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if (part != 2 && part != 3)
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return 1;
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rwxXstugo[5] = true;
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part = 3;
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break;
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/* Tailing blanks are valid in Fortran. */
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case ' ':
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for (i++; i < mode_len; i++)
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if (mode[i] != ' ')
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break;
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if (i != mode_len)
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return 1;
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goto clause_done;
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case ',':
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goto clause_done;
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default:
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return 1;
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}
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}
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clause_done:
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if (part < 2)
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return 1;
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new_mode = 0;
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#ifdef __MINGW32__
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/* Read. */
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if (rwxXstugo[0] && (ugo[0] || honor_umask))
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new_mode |= _S_IREAD;
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/* Write. */
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if (rwxXstugo[1] && (ugo[0] || honor_umask))
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new_mode |= _S_IWRITE;
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#else
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/* Read. */
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if (rwxXstugo[0])
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{
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if (ugo[0] || honor_umask)
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new_mode |= S_IRUSR;
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if (ugo[1] || honor_umask)
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new_mode |= S_IRGRP;
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if (ugo[2] || honor_umask)
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new_mode |= S_IROTH;
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}
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/* Write. */
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if (rwxXstugo[1])
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{
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if (ugo[0] || honor_umask)
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new_mode |= S_IWUSR;
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if (ugo[1] || honor_umask)
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new_mode |= S_IWGRP;
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if (ugo[2] || honor_umask)
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new_mode |= S_IWOTH;
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}
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/* Execute. */
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if (rwxXstugo[2])
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{
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if (ugo[0] || honor_umask)
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new_mode |= S_IXUSR;
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if (ugo[1] || honor_umask)
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new_mode |= S_IXGRP;
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if (ugo[2] || honor_umask)
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new_mode |= S_IXOTH;
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}
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/* 'X' execute. */
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if (rwxXstugo[3]
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&& (is_dir || (file_mode & (S_IXUSR | S_IXGRP | S_IXOTH))))
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new_mode |= (S_IXUSR | S_IXGRP | S_IXOTH);
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/* 's'. */
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if (rwxXstugo[4])
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{
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if (ugo[0] || honor_umask)
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new_mode |= S_ISUID;
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if (ugo[1] || honor_umask)
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new_mode |= S_ISGID;
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}
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/* As original 'u'. */
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if (rwxXstugo[6])
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{
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if (ugo[1] || honor_umask)
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{
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if (file_mode & S_IRUSR)
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new_mode |= S_IRGRP;
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if (file_mode & S_IWUSR)
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new_mode |= S_IWGRP;
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if (file_mode & S_IXUSR)
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new_mode |= S_IXGRP;
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}
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if (ugo[2] || honor_umask)
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{
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if (file_mode & S_IRUSR)
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new_mode |= S_IROTH;
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if (file_mode & S_IWUSR)
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new_mode |= S_IWOTH;
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if (file_mode & S_IXUSR)
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new_mode |= S_IXOTH;
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}
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}
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/* As original 'g'. */
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if (rwxXstugo[7])
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{
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if (ugo[0] || honor_umask)
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{
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if (file_mode & S_IRGRP)
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new_mode |= S_IRUSR;
|
|
|
|
if (file_mode & S_IWGRP)
|
|
|
|
new_mode |= S_IWUSR;
|
|
|
|
if (file_mode & S_IXGRP)
|
|
|
|
new_mode |= S_IXUSR;
|
|
|
|
}
|
|
|
|
if (ugo[2] || honor_umask)
|
|
|
|
{
|
|
|
|
if (file_mode & S_IRGRP)
|
|
|
|
new_mode |= S_IROTH;
|
|
|
|
if (file_mode & S_IWGRP)
|
|
|
|
new_mode |= S_IWOTH;
|
|
|
|
if (file_mode & S_IXGRP)
|
|
|
|
new_mode |= S_IXOTH;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* As original 'o'. */
|
|
|
|
if (rwxXstugo[8])
|
|
|
|
{
|
|
|
|
if (ugo[0] || honor_umask)
|
|
|
|
{
|
|
|
|
if (file_mode & S_IROTH)
|
|
|
|
new_mode |= S_IRUSR;
|
|
|
|
if (file_mode & S_IWOTH)
|
|
|
|
new_mode |= S_IWUSR;
|
|
|
|
if (file_mode & S_IXOTH)
|
|
|
|
new_mode |= S_IXUSR;
|
|
|
|
}
|
|
|
|
if (ugo[1] || honor_umask)
|
|
|
|
{
|
|
|
|
if (file_mode & S_IROTH)
|
|
|
|
new_mode |= S_IRGRP;
|
|
|
|
if (file_mode & S_IWOTH)
|
|
|
|
new_mode |= S_IWGRP;
|
|
|
|
if (file_mode & S_IXOTH)
|
|
|
|
new_mode |= S_IXGRP;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#endif /* __MINGW32__ */
|
|
|
|
|
|
|
|
#ifdef HAVE_UMASK
|
|
|
|
if (honor_umask)
|
|
|
|
new_mode &= ~mode_mask;
|
|
|
|
#endif
|
|
|
|
|
|
|
|
if (set_mode == 1)
|
|
|
|
{
|
|
|
|
#ifdef __MINGW32__
|
|
|
|
if (ugo[0] || honor_umask)
|
|
|
|
file_mode = (file_mode & ~(_S_IWRITE | _S_IREAD))
|
|
|
|
| (new_mode & (_S_IWRITE | _S_IREAD));
|
|
|
|
#else
|
|
|
|
/* Set '='. */
|
|
|
|
if ((ugo[0] || honor_umask) && !rwxXstugo[6])
|
|
|
|
file_mode = (file_mode & ~(S_ISUID | S_IRUSR | S_IWUSR | S_IXUSR))
|
|
|
|
| (new_mode & (S_ISUID | S_IRUSR | S_IWUSR | S_IXUSR));
|
|
|
|
if ((ugo[1] || honor_umask) && !rwxXstugo[7])
|
|
|
|
file_mode = (file_mode & ~(S_ISGID | S_IRGRP | S_IWGRP | S_IXGRP))
|
|
|
|
| (new_mode & (S_ISGID | S_IRGRP | S_IWGRP | S_IXGRP));
|
|
|
|
if ((ugo[2] || honor_umask) && !rwxXstugo[8])
|
|
|
|
file_mode = (file_mode & ~(S_IROTH | S_IWOTH | S_IXOTH))
|
|
|
|
| (new_mode & (S_IROTH | S_IWOTH | S_IXOTH));
|
2014-09-21 17:33:12 +00:00
|
|
|
#ifndef __VXWORKS__
|
2012-03-27 23:13:14 +00:00
|
|
|
if (is_dir && rwxXstugo[5])
|
|
|
|
file_mode |= S_ISVTX;
|
|
|
|
else if (!is_dir)
|
|
|
|
file_mode &= ~S_ISVTX;
|
2014-09-21 17:33:12 +00:00
|
|
|
#endif
|
2012-03-27 23:13:14 +00:00
|
|
|
#endif
|
|
|
|
}
|
|
|
|
else if (set_mode == 2)
|
|
|
|
{
|
|
|
|
/* Clear '-'. */
|
|
|
|
file_mode &= ~new_mode;
|
2014-09-21 17:33:12 +00:00
|
|
|
#if !defined( __MINGW32__) && !defined (__VXWORKS__)
|
2012-03-27 23:13:14 +00:00
|
|
|
if (rwxXstugo[5] || !is_dir)
|
|
|
|
file_mode &= ~S_ISVTX;
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
else if (set_mode == 3)
|
|
|
|
{
|
|
|
|
file_mode |= new_mode;
|
2014-09-21 17:33:12 +00:00
|
|
|
#if !defined (__MINGW32__) && !defined (__VXWORKS__)
|
2012-03-27 23:13:14 +00:00
|
|
|
if (rwxXstugo[5] && is_dir)
|
|
|
|
file_mode |= S_ISVTX;
|
|
|
|
else if (!is_dir)
|
|
|
|
file_mode &= ~S_ISVTX;
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return chmod (file, file_mode);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2015-08-28 15:33:40 +00:00
|
|
|
extern int chmod_func (char *, char *, gfc_charlen_type, gfc_charlen_type);
|
|
|
|
export_proto(chmod_func);
|
|
|
|
|
|
|
|
int
|
|
|
|
chmod_func (char *name, char *mode, gfc_charlen_type name_len,
|
|
|
|
gfc_charlen_type mode_len)
|
|
|
|
{
|
|
|
|
char *cname = fc_strdup (name, name_len);
|
|
|
|
int ret = chmod_internal (cname, mode, mode_len);
|
|
|
|
free (cname);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2012-03-27 23:13:14 +00:00
|
|
|
extern void chmod_i4_sub (char *, char *, GFC_INTEGER_4 *,
|
|
|
|
gfc_charlen_type, gfc_charlen_type);
|
|
|
|
export_proto(chmod_i4_sub);
|
|
|
|
|
|
|
|
void
|
|
|
|
chmod_i4_sub (char *name, char *mode, GFC_INTEGER_4 * status,
|
|
|
|
gfc_charlen_type name_len, gfc_charlen_type mode_len)
|
|
|
|
{
|
|
|
|
int val;
|
|
|
|
|
|
|
|
val = chmod_func (name, mode, name_len, mode_len);
|
|
|
|
if (status)
|
|
|
|
*status = val;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
extern void chmod_i8_sub (char *, char *, GFC_INTEGER_8 *,
|
|
|
|
gfc_charlen_type, gfc_charlen_type);
|
|
|
|
export_proto(chmod_i8_sub);
|
|
|
|
|
|
|
|
void
|
|
|
|
chmod_i8_sub (char *name, char *mode, GFC_INTEGER_8 * status,
|
|
|
|
gfc_charlen_type name_len, gfc_charlen_type mode_len)
|
|
|
|
{
|
|
|
|
int val;
|
|
|
|
|
|
|
|
val = chmod_func (name, mode, name_len, mode_len);
|
|
|
|
if (status)
|
|
|
|
*status = val;
|
|
|
|
}
|
|
|
|
|
|
|
|
#endif
|