18 years ago rsc
add exitcode
Use gcc -ansi -pedantic in 9c. Fix many non-C89-isms.
shut up about signals in scripts
Add rfork builtin.
ignore window size change
19 years ago rsc
try harder to put background jobs in background; do not print in response to SIGPIPE
handle /dev/stdin always
print out signalled exits
add ulimit and umask as builtins
20 years ago rsc
More little bug fixes
Fix small bugs.
handle interrupts and backgrounded processes a little better.
SunOS can rot in hell.
More changes.
Lots of new code imported.
