[xxx@remote11 shell]$ make
gcc -g   -c parse.c
gcc -g   -c lsh.c
lsh.c: In function ‘main’:
lsh.c:78: error: ‘SIGINT’ undeclared (first use in this function)
lsh.c:78: error: (Each undeclared identifier is reported only once
lsh.c:78: error: for each function it appears in.)
lsh.c:102: error: ‘SIGKILL’ undeclared (first use in this function)
lsh.c:145: error: ‘SIGCHLD’ undeclared (first use in this function)
lsh.c: In function ‘execute’:
lsh.c:169: error: ‘SIGINT’ undeclared (first use in this function)
lsh.c:169: error: ‘SIG_IGN’ undeclared (first use in this function)
make: *** [lsh.o] Error 1
[xxx@remote11 shell]$ vim lsh.c
[xxx@remote11 shell]$ make
> sleep 20&
Command sleep started in background with PID [27153]
> ls
DESIGNDOC  Icon  lsh  lsh.c  lsh.o  Makefile  parse.c  parse.h	parse.o
-
-
- STUCK!