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6095
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1 /* Invoke open, but avoid some glitches. |
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2 Copyright (C) 2005 Free Software Foundation, Inc. |
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3 |
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4 This program is free software; you can redistribute it and/or modify |
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5 it under the terms of the GNU General Public License as published by |
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6 the Free Software Foundation; either version 2, or (at your option) |
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7 any later version. |
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8 |
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9 This program is distributed in the hope that it will be useful, |
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10 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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12 GNU General Public License for more details. |
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13 |
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14 You should have received a copy of the GNU General Public License |
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15 along with this program; if not, write to the Free Software Foundation, |
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16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ |
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17 |
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18 /* Written by Paul Eggert. */ |
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19 |
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6116
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20 #if HAVE_CONFIG_H |
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21 # include <config.h> |
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22 #endif |
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23 |
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6095
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24 #include "fcntl-safer.h" |
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25 |
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26 #include <fcntl.h> |
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27 #include <stdarg.h> |
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28 #include "unistd-safer.h" |
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29 |
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30 int |
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31 open_safer (char const *file, int flags, ...) |
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32 { |
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33 mode_t mode = 0; |
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34 |
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35 if (flags & O_CREAT) |
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36 { |
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37 va_list ap; |
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38 va_start (ap, flags); |
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39 |
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40 /* Assume mode_t promotes to int if and only if it is smaller. |
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41 This assumption isn't guaranteed by the C standard, but we |
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42 don't know of any real-world counterexamples. */ |
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43 mode = (sizeof (mode_t) < sizeof (int) |
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44 ? va_arg (ap, int) |
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45 : va_arg (ap, mode_t)); |
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46 |
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47 va_end (ap); |
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48 } |
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49 |
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50 return fd_safer (open (file, flags, mode)); |
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51 } |
