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2935fe8237
Relevant changes see ChangeLog for details:
Add support for ${.SUFFIXES} as read-only variable.
Fix memory leak in cond.c
Punt on write errors - ENOSPC etc.
Lots of code refactoring, rework to reduce memory allocations.
More unit-tests.
46 lines
1.7 KiB
Makefile
46 lines
1.7 KiB
Makefile
# $NetBSD: job-output-null.mk,v 1.3 2021/09/12 10:26:49 rillig Exp $
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#
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# Test how null bytes in the output of a command are handled. Make processes
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# them using null-terminated strings, which may cut off some of the output.
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#
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# As of 2021-04-15, make handles null bytes from the child process
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# inconsistently. It's an edge case though since typically the child
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# processes output text.
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# Note: The printf commands used in this test must only use a single format
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# string, without parameters. This is because it is implementation-dependent
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# how many times the command 'printf "fmt%s" "" "" ""' calls write(2).
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#
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# NetBSD /bin/sh 1 x write("fmtfmtfmt")
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# Dash 1 x write("fmtfmtfmt")
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# NetBSD /bin/ksh 3 x write("fmt") (via /bin/printf)
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# Bash 5 3 x write("fmt")
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#
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# In the latter case the output may arrive in parts, which in this test makes
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# a crucial difference since the outcome of the test depends on whether there
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# is a '\n' in each of the blocks from the output.
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.MAKEFLAGS: -j1 # force jobs mode
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all: .PHONY
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# The null byte from the command output is kept as-is.
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# See CollectOutput, which looks like it intended to replace these
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# null bytes with simple spaces.
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@printf '1\0trailing\n'
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# Give the parent process a chance to see the above output, but not
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# yet the output from the next printf command.
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@sleep 1
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# All null bytes from the command output are kept as-is.
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@printf '2a\0trailing\n''2b\0trailing\n''2c\0trailing\n'
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@sleep 1
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# The null bytes are replaced with spaces since they are not followed
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# by a newline.
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#
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# The three null bytes in a row test whether this output is
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# compressed to a single space like in DebugFailedTarget. It isn't.
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@printf '3a\0without\0\0\0newline, 3b\0without\0\0\0newline.'
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