1# $NetBSD: varmod-gmtime.mk,v 1.10 2021/01/19 05:26:34 rillig Exp $ 2# 3# Tests for the :gmtime variable modifier, which formats a timestamp 4# using strftime(3) in UTC. 5 6.if ${TZ:Uundefined} != "undefined" # see unit-tests/Makefile 7. error 8.endif 9 10# Test for the default time format, %c. Since the time always varies, it's 11# only possible to check for the general format here. The names of the 12# month and weekday are always in English, independent from the locale. 13# Example: Thu Oct 29 18:56:41 2020 14.if ${:U:gmtime:tW:M??? ??? ?? ??\:??\:?? ????} == "" 15. error 16.endif 17 18 19# modifier name too short, falling back to the SysV modifier. 20.if ${%Y:L:gmtim=1593536400} != "%Y" 21. error 22.endif 23 24 25# 2020-07-01T00:00:00Z 26.if ${%Y:L:gmtime=1593536400} != "2020" 27. error 28.endif 29 30 31# modifier name too long, falling back to the SysV modifier. 32.if ${%Y:L:gmtimer=1593536400} != "%Y" 33. error 34.endif 35 36 37# If the modifier name is not matched exactly, fall back to the 38# :from=to modifier. 39.if ${gmtime:L:gm%=local%} != "localtime" 40. error 41.endif 42 43 44# As of 2020-08-16, it is not possible to pass the seconds via a 45# variable expression. This is because parsing of the :gmtime 46# modifier stops at the '$' and returns to ApplyModifiers. 47# 48# There, a colon would be skipped but not a dollar. 49# Parsing therefore continues at the '$' of the ${:U159...}, looking 50# for an ordinary variable modifier. 51# 52# At this point, the ${:U} is expanded and interpreted as a variable 53# modifier, which results in the error message "Unknown modifier '1'". 54# 55# If ApplyModifier_Gmtime were to pass its argument through 56# ParseModifierPart, this would work. 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 from 2020-10-31 21:40:20, not 75# because it would make sense 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, see 104# sys/x86/include/_types.h, __LP64__. 105# 106# Linux on 32-bit systems may still have 32-bit signed time_t, see 107# sysdeps/unix/sysv/linux/generic/bits/typesizes.h, __TIMESIZE. 108.else 109. error 110.endif 111 112 113# Integer overflow, at least before var.c 1.631 from 2020-10-31. 114# Because this modifier is implemented using strtoul, the parsed time was 115# ULONG_MAX, which got converted to -1. This resulted in a time stamp of 116# the second before 1970. 117# 118# Since var.c 1.631, the overflow is detected and produces a parse error. 119.if ${:L:gmtime=10000000000000000000000000000000} != "" 120. error 121.else 122. error 123.endif 124 125# Before var.c 1.631 from 2020-10-31, there was no error handling while 126# parsing the :gmtime modifier, thus no error message was printed. Parsing 127# stopped after the '=', and the remaining string was parsed for more variable 128# modifiers. Because of the unknown modifier 'e' from the 'error', the whole 129# variable value was discarded and thus not printed. 130.if ${:L:gmtime=error} != "" 131. error 132.else 133. error 134.endif 135 136 137all: 138