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annotate lib/stat-time.h @ 6242:e64c2e62add0

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(set_stat_atime, set_stat_ctime, set_stat_mtime): Remove; they were buggy in the HAVE_STRUCT_STAT_ST_SPARE1 case, and they were dubious anyway. I rewrote 'tar' to not use them any more.
author Paul Eggert <eggert@cs.ucla.edu>
date Sat, 17 Sep 2005 06:54:00 +0000
parents d81a8251a9b0
children 54a70822331f
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6237
d81a8251a9b0 * MODULES.html.sh (File system functions): Add stat-time.
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1 /* stat-related time functions.
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2
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3 Copyright (C) 2005 Free Software Foundation, Inc.
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4
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5 This program is free software; you can redistribute it and/or modify
d81a8251a9b0 * MODULES.html.sh (File system functions): Add stat-time.
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6 it under the terms of the GNU General Public License as published by
d81a8251a9b0 * MODULES.html.sh (File system functions): Add stat-time.
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7 the Free Software Foundation; either version 2, or (at your option)
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8 any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
d81a8251a9b0 * MODULES.html.sh (File system functions): Add stat-time.
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13 GNU General Public License for more details.
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14
d81a8251a9b0 * MODULES.html.sh (File system functions): Add stat-time.
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15 You should have received a copy of the GNU General Public License
d81a8251a9b0 * MODULES.html.sh (File system functions): Add stat-time.
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16 along with this program; if not, write to the Free Software Foundation,
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17 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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18
d81a8251a9b0 * MODULES.html.sh (File system functions): Add stat-time.
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19 /* Written by Paul Eggert. */
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20
d81a8251a9b0 * MODULES.html.sh (File system functions): Add stat-time.
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21 #ifndef STAT_TIME_H
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22 #define STAT_TIME_H 1
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23
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24 #include "timespec.h"
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25
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26 /* STAT_TIMESPEC (ST, ST_XTIM) is the ST_XTIM member for *ST of type
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27 struct timespec, if available. If not, then STAT_TIMESPEC_NS (ST,
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28 ST_XTIM) is the nanosecond component of the ST_XTIM member for *ST,
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29 if available. ST_XTIM can be st_atim, st_ctim, or st_mtim for
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30 access, status change, or data modification time, respectively.
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31
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32 These macros are private to stat-time.h. */
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33 #if defined HAVE_STRUCT_STAT_ST_ATIM_TV_NSEC
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34 # define STAT_TIMESPEC(st, st_xtim) ((st)->st_xtim)
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35 #elif defined HAVE_STRUCT_STAT_ST_ATIMESPEC_TV_NSEC
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36 # define STAT_TIMESPEC(st, st_xtim) ((st)->st_xtim##espec)
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37 #elif defined HAVE_STRUCT_STAT_ST_ATIMENSEC
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38 # define STAT_TIMESPEC_NS(st, st_xtim) ((st)->st_xtim##ensec)
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39 #elif defined HAVE_STRUCT_STAT_ST_ATIM_ST__TIM_TV_NSEC
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40 # define STAT_TIMESPEC_NS(st, st_xtim) ((st)->st_xtim.st__tim.tv_nsec)
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41 #endif
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42
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43 /* Return the nanosecond component of *ST's access time. */
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44 static inline long int
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45 get_stat_atime_ns (struct stat const *st)
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46 {
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47 # if defined STAT_TIMESPEC
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48 return STAT_TIMESPEC (st, st_atim).tv_nsec;
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49 # elif defined STAT_TIMESPEC_NS
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50 return STAT_TIMESPEC_NS (st, st_atim);
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51 # elif defined HAVE_STRUCT_STAT_ST_SPARE1
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52 return st->st_spare1 * 1000;
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53 # else
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54 return 0;
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55 # endif
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56 }
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57
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58 /* Return the nanosecond component of *ST's status change time. */
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59 static inline long int
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60 get_stat_ctime_ns (struct stat const *st)
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61 {
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62 # if defined STAT_TIMESPEC
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63 return STAT_TIMESPEC (st, st_ctim).tv_nsec;
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64 # elif defined STAT_TIMESPEC_NS
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65 return STAT_TIMESPEC_NS (st, st_ctim);
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66 # elif defined HAVE_STRUCT_STAT_ST_SPARE1
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67 return st->st_spare3 * 1000;
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68 # else
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69 return 0;
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70 # endif
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71 }
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72
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73 /* Return the nanosecond component of *ST's data modification time. */
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74 static inline long int
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75 get_stat_mtime_ns (struct stat const *st)
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76 {
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77 # if defined STAT_TIMESPEC
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78 return STAT_TIMESPEC (st, st_mtim).tv_nsec;
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79 # elif defined STAT_TIMESPEC_NS
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80 return STAT_TIMESPEC_NS (st, st_mtim);
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81 # elif defined HAVE_STRUCT_STAT_ST_SPARE1
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82 return st->st_spare2 * 1000;
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83 # else
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84 return 0;
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85 # endif
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86 }
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87
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88 /* Return *ST's access time. */
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89 static inline struct timespec
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90 get_stat_atime (struct stat const *st)
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91 {
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92 #ifdef STAT_TIMESPEC
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93 return STAT_TIMESPEC (st, st_atim);
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94 #else
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95 struct timespec t;
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96 t.tv_sec = st->st_atime;
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97 t.tv_nsec = get_stat_atime_ns (st);
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98 return t;
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99 #endif
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100 }
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101
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102 /* Return *ST's status change time. */
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103 static inline struct timespec
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104 get_stat_ctime (struct stat const *st)
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105 {
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106 #ifdef STAT_TIMESPEC
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107 return STAT_TIMESPEC (st, st_ctim);
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108 #else
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109 struct timespec t;
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110 t.tv_sec = st->st_ctime;
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111 t.tv_nsec = get_stat_ctime_ns (st);
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112 return t;
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113 #endif
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114 }
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115
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116 /* Return *ST's data modification time. */
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117 static inline struct timespec
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118 get_stat_mtime (struct stat const *st)
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119 {
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120 #ifdef STAT_TIMESPEC
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121 return STAT_TIMESPEC (st, st_mtim);
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122 #else
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Paul Eggert <eggert@cs.ucla.edu>
parents:
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123 struct timespec t;
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124 t.tv_sec = st->st_mtime;
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125 t.tv_nsec = get_stat_mtime_ns (st);
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126 return t;
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127 #endif
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128 }
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129
d81a8251a9b0 * MODULES.html.sh (File system functions): Add stat-time.
Paul Eggert <eggert@cs.ucla.edu>
parents:
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130 #endif