varmod-gmtime.mk revision 1.16
1 # $NetBSD: varmod-gmtime.mk,v 1.16 2023/08/19 08:19:25 rillig Exp $ 2 # 3 # Tests for the :gmtime variable modifier, which formats a timestamp 4 # using strftime(3) in UTC. 5 # 6 # See also: 7 # varmod-localtime.mk 8 9 .if ${TZ:Uundefined} != "undefined" # see unit-tests/Makefile 10 . error 11 .endif 12 13 # Test for the default time format, %c. Since the time always varies, it's 14 # only possible to check for the general format here. The names of the 15 # month and weekday are always in English, independent from the locale. 16 # Example: Thu Oct 29 18:56:41 2020 17 .if ${:U:gmtime:tW:M??? ??? ?? ??\:??\:?? ????} == "" 18 . error 19 .endif 20 21 22 # modifier name too short, falling back to the SysV modifier. 23 .if ${%Y:L:gmtim=1593536400} != "%Y" 24 . error 25 .endif 26 27 28 # 2020-07-01T00:00:00Z 29 .if ${%Y:L:gmtime=1593536400} != "2020" 30 . error 31 .endif 32 33 34 # modifier name too long, falling back to the SysV modifier. 35 .if ${%Y:L:gmtimer=1593536400} != "%Y" 36 . error 37 .endif 38 39 40 # If the modifier name is not matched exactly, fall back to the 41 # :from=to modifier. 42 .if ${gmtime:L:gm%=local%} != "localtime" 43 . error 44 .endif 45 46 47 # Before var.c 1.1050 from 2023-05-09, it was not possible to pass the 48 # seconds via a variable expression. 49 .if ${%Y:L:gmtime=${:U1593536400}} != "2020" 50 . error 51 .endif 52 53 54 # Before var.c 1.631 from 2020-10-31 21:40:20, it was possible to pass 55 # negative time stamps to the :gmtime modifier, resulting in dates before 56 # 1970. Going back 50 years in the past is not a practical use case for 57 # make. Therefore, since var.c 1.631, negative time stamps produce a 58 # parse error. 59 # expect+2: Invalid time value "-1" 60 # expect+1: Malformed conditional (${:L:gmtime=-1} != "") 61 .if ${:L:gmtime=-1} != "" 62 . error 63 .else 64 . error 65 .endif 66 67 68 # Spaces were allowed before var.c 1.631 from 2020-10-31 21:40:20, not 69 # because it would make sense but just as a side-effect from using strtoul. 70 # expect+2: Invalid time value " 1" 71 # expect+1: Malformed conditional (${:L:gmtime= 1} != "") 72 .if ${:L:gmtime= 1} != "" 73 . error 74 .else 75 . error 76 .endif 77 78 79 # 0 means now; this differs from GNode.mtime, where a 0 means nonexistent. 80 # Since "now" constantly changes, the strongest possible test is to match the 81 # resulting pattern. 82 .if !${:L:gmtime=0:tW:M??? ??? ?? ??\:??\:?? 20??} 83 . error 84 .endif 85 86 87 .if ${:L:gmtime=1} != "Thu Jan 1 00:00:01 1970" 88 . error 89 .endif 90 91 92 # INT32_MAX 93 .if ${:L:gmtime=2147483647} != "Tue Jan 19 03:14:07 2038" 94 . error 95 .endif 96 97 98 .if ${:L:gmtime=2147483648} == "Tue Jan 19 03:14:08 2038" 99 # All systems that have unsigned time_t or 64-bit time_t. 100 .elif ${:L:gmtime=2147483648} == "Fri Dec 13 20:45:52 1901" 101 # FreeBSD-12.0-i386 still has 32-bit signed time_t, see 102 # sys/x86/include/_types.h, __LP64__. 103 # 104 # Linux on 32-bit systems may still have 32-bit signed time_t, see 105 # sysdeps/unix/sysv/linux/generic/bits/typesizes.h, __TIMESIZE. 106 .else 107 . error 108 .endif 109 110 111 # Integer overflow, at least before var.c 1.631 from 2020-10-31. 112 # Because this modifier is implemented using strtoul, the parsed time was 113 # ULONG_MAX, which got converted to -1. This resulted in a time stamp of 114 # the second before 1970. 115 # 116 # Since var.c 1.631 from 2020-10-31, the overflow is detected and produces a 117 # parse error. 118 # expect+2: Invalid time value "10000000000000000000000000000000" 119 # expect+1: Malformed conditional (${:L:gmtime=10000000000000000000000000000000} != "") 120 .if ${:L:gmtime=10000000000000000000000000000000} != "" 121 . error 122 .else 123 . error 124 .endif 125 126 # Before var.c 1.631 from 2020-10-31, there was no error handling while 127 # parsing the :gmtime modifier, thus no error message was printed. Parsing 128 # stopped after the '=', and the remaining string was parsed for more variable 129 # modifiers. Because of the unknown modifier 'e' from the 'error', the whole 130 # variable value was discarded and thus not printed. 131 # expect+2: Invalid time value "error" 132 # expect+1: Malformed conditional (${:L:gmtime=error} != "") 133 .if ${:L:gmtime=error} != "" 134 . error 135 .else 136 . error 137 .endif 138 139 # Before var.c 1.1050 from 2023-05-09, the timestamp could be directly 140 # followed by the next modifier, without a ':' separator. This was the same 141 # bug as for the ':L' and ':P' modifiers. 142 # expect+2: Invalid time value "100000S,1970,bad," 143 # expect+1: Malformed conditional (${%Y:L:gmtime=100000S,1970,bad,} != "bad") 144 .if ${%Y:L:gmtime=100000S,1970,bad,} != "bad" 145 . error 146 .endif 147 148 149 # As of 2023-08-19, ':gmtime' but not ':localtime' reports wrong values for 150 # '%s', depending on the operating system and the timezone, as demonstrated by 151 # the following test program: 152 # 153 # for mod in gmtime localtime; do 154 # for tz in UTC Europe/Berlin America/Los_Angeles; do 155 # TZ=$tz bmake -r -v "\${%F %T %z %s $mod $tz:L:$mod}" 156 # done 157 # done 158 # 159 # Cygwin: 160 # 2023-08-19 07:34:06 +0000 1692430446 gmtime UTC 161 # 2023-08-19 07:34:06 +0000 1692430446 gmtime Europe/Berlin 162 # 2023-08-19 07:34:06 +0000 1692430446 gmtime America/Los_Angeles 163 # 2023-08-19 07:34:06 +0000 1692430446 localtime UTC 164 # 2023-08-19 09:34:07 +0200 1692430447 localtime Europe/Berlin 165 # 2023-08-19 00:34:07 -0700 1692430447 localtime America/Los_Angeles 166 # 167 # Looks good: 168 # * ':gmtime' consistently reports timezone offset '+0000'. 169 # * '%s' is independent of the timezone. 170 # 171 # NetBSD 10.99: 172 # 2023-08-19 07:34:37 +0000 1692430477 gmtime UTC 173 # 2023-08-19 07:34:37 +0100 1692426877 gmtime Europe/Berlin 174 # 2023-08-19 07:34:37 -0800 1692459277 gmtime America/Los_Angeles 175 # 2023-08-19 07:34:37 +0000 1692430477 localtime UTC 176 # 2023-08-19 09:34:37 +0200 1692430477 localtime Europe/Berlin 177 # 2023-08-19 00:34:37 -0700 1692430477 localtime America/Los_Angeles 178 # 179 # Looks bad: 180 # * ':gmtime' reports different timezone offsets. 181 # * ':gmtime' reports different seconds since the Epoch. 182 # * ':gmtime' reports the timezone offset '+0100' for Europe/Berlin, 183 # even though at 2023-08-19, DST with offset '+0200' was in place. 184 # 185 # Debian: 186 # 2023-08-19 07:29:10 +0000 1692430150 gmtime UTC 187 # 2023-08-19 07:29:10 +0000 1692426550 gmtime Europe/Berlin 188 # 2023-08-19 07:29:10 +0000 1692458950 gmtime America/Los_Angeles 189 # 2023-08-19 07:29:10 +0000 1692430150 localtime UTC 190 # 2023-08-19 09:29:10 +0200 1692430150 localtime Europe/Berlin 191 # 2023-08-19 00:29:10 -0700 1692430150 localtime America/Los_Angeles 192 # 193 # Looks mixed: 194 # * ':gmtime' reports the correct timezone offset '+0000'. 195 # * ':gmtime' reports different seconds since the Epoch, and the '%s' 196 # value cannot be derived from the '%F %T %z' values. 197 198 all: 199
Indexes created Fri Oct 03 02:09:57 GMT 2025