first commit

Author: abrantesarthur

.gitignore

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+*.o
+.deps
+cmdline
+out
+sh61

AUTHORS.md

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+Authors and collaborators
+=========================
+
+Students
+--------
+(List your team members and describe in a couple words how you divided the
+work.)
+Arthur Abrantes did everything
+
+Collaborators
+-------------
+(List any other collaborators and describe help you got from other people in
+the class.)
+I received help from TF in office hours
+
+
+Citations
+---------
+(List any other sources consulted.)

GNUmakefile

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+# Default optimization level
+O ?= 2
+
+all: sh61
+
+-include build/rules.mk
+
+%.o: %.c sh61.h $(BUILDSTAMP)
+	$(call run,$(CC) $(CPPFLAGS) $(CFLAGS) $(O) $(DEPCFLAGS) -o $@ -c,COMPILE,$<)
+
+sh61: sh61.o helpers.o
+	$(call run,$(CC) $(CFLAGS) $(O) -o $@ $^ $(LDFLAGS) $(LIBS),LINK $@)
+
+sleep61: sleep61.c
+	$(call run,$(CC) $(CFLAGS) $(O) -o $@ $^ $(LDFLAGS) $(LIBS),BUILD $@)
+
+check: sh61
+	perl check.pl
+
+check-%: sh61
+	perl check.pl $(subst check-,,$@)
+
+clean: clean-main
+clean-main:
+	$(call run,rm -rf sh61 *.o *~ *.bak core *.core,CLEAN)
+	$(call run,rm -rf $(DEPSDIR) out *.dSYM)
+
+realclean: clean
+	@echo + realclean
+	$(V)rm -rf $(DISTDIR) $(DISTDIR).tar.gz
+
+.PRECIOUS: %.o
+.PHONY: all clean clean-main check check-%

README.md

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+CS 61 Problem Set 5
+===================
+
+**Fill out both this file and `AUTHORS.md` before submitting.** We grade
+anonymously, so put all personally identifying information in `AUTHORS.md`.
+
+Grading notes (if any)
+----------------------
+I think I lost some style points in my previous attempt solely because I was not checking for failures for when fork() returned -1. However, I am checking that now, so I would really appreciate if my style for this problem set could be regraded.
+
+
+Extra credit attempted (if any)
+-------------------------------

build/rules.mk

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+# are we using clang?
+ISCLANG := $(shell if $(CC) --version | grep -e 'LLVM\|clang' >/dev/null; then echo 1; else echo 0; fi)
+
+CFLAGS := -std=gnu11 -W -Wall -Wshadow -g $(DEFS) $(CFLAGS)
+O ?= -O3
+ifeq ($(filter 0 1 2 3 s,$(O)$(NOOVERRIDEO)),$(strip $(O)))
+override O := -O$(O)
+endif
+ifeq ($(SANITIZE),1)
+ifeq ($(strip $(shell $(CC) -fsanitize=address -x c -E /dev/null 2>&1 | grep sanitize=)),)
+CFLAGS += -fsanitize=address
+else
+$(info ** WARNING: Your C compiler does not support `-fsanitize=address`.)
+endif
+ifeq ($(strip $(shell $(CC) -fsanitize=undefined -x c -E /dev/null 2>&1 | grep sanitize=)),)
+CFLAGS += -fsanitize=undefined
+else
+$(info ** WARNING: Your C compiler does not support `-fsanitize=undefined`.)
+$(info ** You may want to install gcc-4.9 or greater.)
+endif
+ifeq ($(ISCLANG),0)
+ifeq ($(wildcard /usr/bin/gold),/usr/bin/gold)
+CFLAGS += -fuse-ld=gold
+endif
+endif
+endif
+
+# these rules ensure dependencies are created
+DEPCFLAGS = -MD -MF $(DEPSDIR)/$*.d -MP
+DEPSDIR := .deps
+BUILDSTAMP := $(DEPSDIR)/rebuildstamp
+DEPFILES := $(wildcard $(DEPSDIR)/*.d)
+ifneq ($(DEPFILES),)
+include $(DEPFILES)
+endif
+
+
+# when the C compiler or optimization flags change, rebuild all objects
+ifneq ($(strip $(DEP_CC)),$(strip $(CC) $(CPPFLAGS) $(CFLAGS) $(O)))
+DEP_CC := $(shell mkdir -p $(DEPSDIR); echo >$(BUILDSTAMP); echo "DEP_CC:=$(CC) $(CFLAGS) $(O)" >$(DEPSDIR)/_cc.d)
+endif
+
+V = 0
+ifeq ($(V),1)
+run = $(1) $(3)
+xrun = /bin/echo "$(1) $(3)" && $(1) $(3)
+else
+run = @$(if $(2),/bin/echo "  $(2) $(3)" &&,) $(1) $(3)
+xrun = $(if $(2),/bin/echo "  $(2) $(3)" &&,) $(1) $(3)
+endif
+runquiet = @$(1) $(3)
+
+# cancel implicit rules we don't want
+%: %.c
+%.o: %.c
+%: %.o
+
+$(BUILDSTAMP):
+	@mkdir -p $(@D)
+	@echo >$@
+
+always:
+	@:
+
+clean-hook:
+	@:
+
+.PHONY: always clean-hook
+.PRECIOUS: %.o