1*4fde40d9SSimon J. Gerraty# $NetBSD: job-output-null.mk,v 1.4 2022/09/03 08:03:27 rillig Exp $ 2b0c40a00SSimon J. Gerraty# 3b0c40a00SSimon J. Gerraty# Test how null bytes in the output of a command are handled. Make processes 4b0c40a00SSimon J. Gerraty# them using null-terminated strings, which may cut off some of the output. 5b0c40a00SSimon J. Gerraty# 6*4fde40d9SSimon J. Gerraty# Before job.c 1.454 from 2022-09-03, make handled null bytes in the output 7*4fde40d9SSimon J. Gerraty# from the child process inconsistently. It's an edge case though since 8*4fde40d9SSimon J. Gerraty# typically the child processes output text. 9b0c40a00SSimon J. Gerraty 1012904384SSimon J. Gerraty# Note: The printf commands used in this test must only use a single format 1112904384SSimon J. Gerraty# string, without parameters. This is because it is implementation-dependent 1212904384SSimon J. Gerraty# how many times the command 'printf "fmt%s" "" "" ""' calls write(2). 1312904384SSimon J. Gerraty# 1412904384SSimon J. Gerraty# NetBSD /bin/sh 1 x write("fmtfmtfmt") 1512904384SSimon J. Gerraty# Dash 1 x write("fmtfmtfmt") 1612904384SSimon J. Gerraty# NetBSD /bin/ksh 3 x write("fmt") (via /bin/printf) 1712904384SSimon J. Gerraty# Bash 5 3 x write("fmt") 1812904384SSimon J. Gerraty# 19*4fde40d9SSimon J. Gerraty# In the latter case the output may arrive in 1 to 3 parts, depending on the 20*4fde40d9SSimon J. Gerraty# exact timing, which in this test makes a crucial difference since before 21*4fde40d9SSimon J. Gerraty# job.c 1.454 from 2022-09-03, the outcome of the test depended on whether 22*4fde40d9SSimon J. Gerraty# there was a '\n' in each of the blocks from the output. Depending on the 23*4fde40d9SSimon J. Gerraty# exact timing, the output of that test varied, its possible values were '2a', 24*4fde40d9SSimon J. Gerraty# '2a 2b', '2a 2c', '2a 2b 2c'. 2512904384SSimon J. Gerraty 26b0c40a00SSimon J. Gerraty.MAKEFLAGS: -j1 # force jobs mode 27b0c40a00SSimon J. Gerraty 28b0c40a00SSimon J. Gerratyall: .PHONY 29*4fde40d9SSimon J. Gerraty # The null byte from the command output is replaced with a single 30*4fde40d9SSimon J. Gerraty # space by CollectOutput. 3112904384SSimon J. Gerraty @printf '1\0trailing\n' 32*4fde40d9SSimon J. Gerraty # expect: 1 trailing 33b0c40a00SSimon J. Gerraty 34b0c40a00SSimon J. Gerraty # Give the parent process a chance to see the above output, but not 35b0c40a00SSimon J. Gerraty # yet the output from the next printf command. 36b0c40a00SSimon J. Gerraty @sleep 1 37b0c40a00SSimon J. Gerraty 38*4fde40d9SSimon J. Gerraty # Each null byte from the command output is replaced with a single 39*4fde40d9SSimon J. Gerraty # space. 4012904384SSimon J. Gerraty @printf '2a\0trailing\n''2b\0trailing\n''2c\0trailing\n' 41*4fde40d9SSimon J. Gerraty # expect: 2a trailing 42*4fde40d9SSimon J. Gerraty # expect: 2b trailing 43*4fde40d9SSimon J. Gerraty # expect: 2c trailing 44b0c40a00SSimon J. Gerraty 45b0c40a00SSimon J. Gerraty @sleep 1 46b0c40a00SSimon J. Gerraty 47*4fde40d9SSimon J. Gerraty # Each null byte from the command output is replaced with a single 48*4fde40d9SSimon J. Gerraty # space. Because there is no trailing newline in the output, these 49*4fde40d9SSimon J. Gerraty # null bytes were replaced with spaces even before job.c 1.454 from 50*4fde40d9SSimon J. Gerraty # 2022-09-03, unlike in the cases above. 51b0c40a00SSimon J. Gerraty # 52b0c40a00SSimon J. Gerraty # The three null bytes in a row test whether this output is 53b0c40a00SSimon J. Gerraty # compressed to a single space like in DebugFailedTarget. It isn't. 5412904384SSimon J. Gerraty @printf '3a\0without\0\0\0newline, 3b\0without\0\0\0newline.' 55*4fde40d9SSimon J. Gerraty # expect: 3a without newline, 3b without newline. 56