unansi

这是一个同样来自贝尔实验室的和UNIX有着渊源的操作系统, 其简洁的设计和实现易于我们学习和理解

# The awk program cvt will convert the relatively sterotyped ansi c
# in this troff distribution into older-style c, by munging function
# declarations.

# You will also have to edit fns.h, by
#	sed 's/(.*)/()/g' fns.h >foo; mv foo fns.h
# check this before doing the move!

# you will also have to make some editing changes in
# tdef.h in the Contab structure: s/(void)/()/
# you may have to fix up some function declarations
# in n4.c, the ones with (*f)(Tchar).

# you will surely also have header files to deal with.

# the most obvious cases are dealt with by the following
# commands.  make sure you do this stuff on a copy!

# function prototypes in n8.c probably belong in fns.h. readpats(void) must
# be readpats() before cvt runs.

sed \
	-e 's/(void)/()/' \
	-e 's/(Tchar[^)]*);/();/' \
	-e 's/(char[^)]*);/();/' \
	-e 's/(int[^)]*);/();/' \
n8.c >foo
mv foo n8.c

for i in *.c
do
	cvt $i >foo
	mv foo $i
done

sed 's/(.*)/()/g' fns.h >foo
mv foo fns.h

sed -e 's/(void)/()/g' -e '/stdlib/d' tdef.h >foo
mv foo tdef.h

# Compliers may not approve of void *setbrk() in fns.h and n3.c.

sed 's/^void\*[ 	]setbrk/char*	setbrk/' fns.h >foo
mv foo fns.h

sed 's/^void \*setbrk/char *setbrk/' n3.c >foo
mv foo n3.c