varmod-gmtime.mk revision 1.7
1 # $NetBSD: varmod-gmtime.mk,v 1.7 2020/12/21 20:35:17 rillig Exp $ 2 # 3 # Tests for the :gmtime variable modifier, which formats a timestamp 4 # using strftime(3) in UTC. 5 6 7 # Test for the default time format, %c. Since the time always varies, it's 8 # only possible to check for the general format here. The names of the 9 # month and weekday are always in English, independent from the locale. 10 # Example: Thu Oct 29 18:56:41 2020 11 .if ${:U:gmtime:tW:M??? ??? ?? ??\:??\:?? ????} == "" 12 . error 13 .endif 14 15 16 # modifier name too short, falling back to the SysV modifier. 17 .if ${%Y:L:gmtim=1593536400} != "%Y" 18 . error 19 .endif 20 21 22 # 2020-07-01T00:00:00Z 23 .if ${%Y:L:gmtime=1593536400} != "2020" 24 . error 25 .endif 26 27 28 # modifier name too long, falling back to the SysV modifier. 29 .if ${%Y:L:gmtimer=1593536400} != "%Y" 30 . error 31 .endif 32 33 34 # If the modifier name is not matched exactly, fall back to the 35 # :from=to modifier. 36 .if ${gmtime:L:gm%=local%} != "localtime" 37 . error 38 .endif 39 40 41 # As of 2020-08-16, it is not possible to pass the seconds via a 42 # variable expression. This is because parsing of the :gmtime 43 # modifier stops at the '$' and returns to ApplyModifiers. 44 # 45 # There, a colon would be skipped but not a dollar. 46 # Parsing therefore continues at the '$' of the ${:U159...}, looking 47 # for an ordinary variable modifier. 48 # 49 # At this point, the ${:U} is expanded and interpreted as a variable 50 # modifier, which results in the error message "Unknown modifier '1'". 51 # 52 # If ApplyModifier_Gmtime were to pass its argument through 53 # ParseModifierPart, this would work. 54 # 55 # XXX: Where does the empty line 4 in varmod-gmtime.exp come from? 56 # TODO: Remove the \n from "Invalid time value: %s\n" in var.c. 57 .if ${%Y:L:gmtime=${:U1593536400}} != "mtime=11593536400}" 58 . error 59 .endif 60 61 62 # Before var.c 1.631 from 2020-10-31 21:40:20, it was possible to pass 63 # negative time stamps to the :gmtime modifier, resulting in dates before 64 # 1970. Going back 50 years in the past is not a practical use case for 65 # make. Therefore, since var.c 1.631, negative time stamps produce a 66 # parse error. 67 .if ${:L:gmtime=-1} != "" 68 . error 69 .else 70 . error 71 .endif 72 73 74 # Spaces were allowed before var.c 1.631, not because it would make sense 75 # but just as a side-effect from using strtoul. 76 .if ${:L:gmtime= 1} != "" 77 . error 78 .endif 79 80 81 # 0 means now; this differs from GNode.mtime, where a 0 means nonexistent. 82 # Since "now" constantly changes, the strongest possible test is to match the 83 # resulting pattern. 84 .if !${:L:gmtime=0:tW:M??? ??? ?? ??\:??\:?? 20??} 85 . error 86 .endif 87 88 89 .if ${:L:gmtime=1} != "Thu Jan 1 00:00:01 1970" 90 . error 91 .endif 92 93 94 # INT32_MAX 95 .if ${:L:gmtime=2147483647} != "Tue Jan 19 03:14:07 2038" 96 . error 97 .endif 98 99 100 .if ${:L:gmtime=2147483648} == "Tue Jan 19 03:14:08 2038" 101 # All systems that have unsigned time_t or 64-bit time_t. 102 .elif ${:L:gmtime=2147483648} != "Fri Dec 13 20:45:52 1901" 103 # FreeBSD-12.0-i386 still has 32-bit signed time_t. 104 .else 105 . error 106 .endif 107 108 109 # Integer overflow, at least before var.c 1.631 from 2020-10-31. 110 # Because this modifier is implemented using strtoul, the parsed time was 111 # ULONG_MAX, which got converted to -1. This resulted in a time stamp of 112 # the second before 1970. 113 # 114 # Since var.c 1.613, the overflow is detected and produces a parse error. 115 .if ${:L:gmtime=10000000000000000000000000000000} != "" 116 . error 117 .else 118 . error 119 .endif 120 121 # Before var.c 1.613 from 2020-10-31, there was no error handling while 122 # parsing the :gmtime modifier, thus no error message is printed. Parsing 123 # stopped after the '=', and the remaining string was parsed for more variable 124 # modifiers. Because of the unknown modifier 'e' from the 'error', the whole 125 # variable value was discarded and thus not printed. 126 .if ${:L:gmtime=error} != "" 127 . error 128 .else 129 . error 130 .endif 131 132 133 all: 134
Indexes created Thu Oct 02 14:10:14 GMT 2025