From: Jérôme Benoit Date: Mon, 26 Feb 2018 21:34:27 +0000 (+0100) Subject: Add pipe reading and writing course code. X-Git-Url: https://git.piment-noir.org/?p=TD_SE.git;a=commitdiff_plain;h=be736fd84e3a4a90c39e5166df76ebbef322fc66 Add pipe reading and writing course code. Signed-off-by: Jérôme Benoit --- diff --git a/.gitignore b/.gitignore index 3f40103..cb51076 100644 --- a/.gitignore +++ b/.gitignore @@ -1,6 +1,8 @@ TD3/exo2/monexec/monexec philosophe/philosophe prodcons/prodcons +rw/reader/reader +rw/writer/writer threads/exemple1 upipe/upipe exo[[:digit:]] diff --git a/rw/reader/Makefile b/rw/reader/Makefile new file mode 100644 index 0000000..c2cc024 --- /dev/null +++ b/rw/reader/Makefile @@ -0,0 +1,83 @@ +# Sample Makefile to build simple project. +# +# This Makefile expect all source files (.c) to be at the same level, in the +# current working directory. +# +# It will automatically generate dependencies, compile all files, and produce a +# binary using the provided name. +# +# Set BINARY_NAME to the name of the binary file to build. +# Set BUILD_TYPE to either debug or release +# +# Automatic dependencies code from: +# http://make.mad-scientist.net/papers/advanced-auto-dependency-generation/#tldr +BINARY_NAME=reader +BUILD_TYPE=debug +#BUILD_TYPE=release +LDLIBS=-lpthread + +# ==================================== +# DO NOT CHANGE STUFF BEYOND THIS LINE +# ==================================== + +all: $(BINARY_NAME) + +CC=gcc +LD=gcc + +WARN_FLAGS = -Wall -Wextra +STD_FLAG = -std=c11 + +ifeq ($(BUILD_TYPE),debug) +BUILDDIR := .build/debug +DEBUG_FLAG = -g +DEBUG = 1 +STRIP_FLAG = +OPTI_FLAG = -O0 +else +BUILDDIR := .build/release +DEBUG_FLAG = +DEBUG = 0 +STRIP_FLAG = -s +OPTI_FLAG = -O3 +endif + +CFLAGS := -DDEBUG=$(DEBUG) $(CFLAGS) $(WARN_FLAGS) $(STD_FLAG) $(OPTI_FLAG) $(DEBUG_FLAG) +LDFLAGS := $(LDFLAGS) $(STRIP_FLAG) + +OBJDIR := $(BUILDDIR)/objs +$(shell mkdir -p $(OBJDIR)) + +SRCS=$(wildcard *.c) +OBJS=$(patsubst %.c,$(OBJDIR)/%.o,$(SRCS)) + +DEPDIR := $(BUILDDIR)/deps +$(shell mkdir -p $(DEPDIR)) +DEPFLAGS = -MT $@ -MMD -MP -MF $(DEPDIR)/$*.Td +POSTCOMPILE = mv -f $(DEPDIR)/$*.Td $(DEPDIR)/$*.d + +$(BINARY_NAME): $(OBJS) + @echo "[LD ] $@" + @$(LD) $(CFLAGS) $(LDFLAGS) $^ $(LDLIBS) -o $@ + +$(OBJDIR)/%.o: %.c $(DEPDIR)/%.d + @echo "[C ] $*" + @$(CC) $(DEPFLAGS) $(CFLAGS) -c $< -o $@ + @$(POSTCOMPILE) + +$(DEPDIR)/%.d: ; + +.PRECIOUS: $(DEPDIR)/%.d + +include $(wildcard $(patsubst %,$(DEPDIR)/%.d,$(basename $(SRCS)))) + +clean: + @echo "[CLN]" + -@rm -r $(BUILDDIR) + -@rm $(BINARY_NAME) + +disassemble: $(BINARY_NAME) + objdump -d $< | less + +symbols: $(BINARY_NAME) + objdump -t $< | sort | less diff --git a/rw/reader/reader.c b/rw/reader/reader.c new file mode 100644 index 0000000..0e9fcf6 --- /dev/null +++ b/rw/reader/reader.c @@ -0,0 +1,24 @@ +// programme reader.c lit un message à partir du tube mypipe + +#include +#include +#include + +int main() +{ + int fd, n; + char message[100]; + // ouverture du tube mypipe en mode lecture + fd = open("mypipe", O_RDONLY); + perror("open failure"); + printf("ici reader[%d]\n", getpid()); + if (fd != -1) { + // récupérer un message du tube, taille maximale est 100. + while ((n = read(fd, message, 100)) > 0) + // n est le nombre de caractères lus + printf("%s\n", message); + } else + printf("désolé, le tube n'est pas disponible\n"); + close(fd); + return 0; +} diff --git a/rw/writer/Makefile b/rw/writer/Makefile new file mode 100644 index 0000000..36c2c7f --- /dev/null +++ b/rw/writer/Makefile @@ -0,0 +1,83 @@ +# Sample Makefile to build simple project. +# +# This Makefile expect all source files (.c) to be at the same level, in the +# current working directory. +# +# It will automatically generate dependencies, compile all files, and produce a +# binary using the provided name. +# +# Set BINARY_NAME to the name of the binary file to build. +# Set BUILD_TYPE to either debug or release +# +# Automatic dependencies code from: +# http://make.mad-scientist.net/papers/advanced-auto-dependency-generation/#tldr +BINARY_NAME=writer +BUILD_TYPE=debug +#BUILD_TYPE=release +LDLIBS=-lpthread + +# ==================================== +# DO NOT CHANGE STUFF BEYOND THIS LINE +# ==================================== + +all: $(BINARY_NAME) + +CC=gcc +LD=gcc + +WARN_FLAGS = -Wall -Wextra +STD_FLAG = -std=c11 + +ifeq ($(BUILD_TYPE),debug) +BUILDDIR := .build/debug +DEBUG_FLAG = -g +DEBUG = 1 +STRIP_FLAG = +OPTI_FLAG = -O0 +else +BUILDDIR := .build/release +DEBUG_FLAG = +DEBUG = 0 +STRIP_FLAG = -s +OPTI_FLAG = -O3 +endif + +CFLAGS := -DDEBUG=$(DEBUG) $(CFLAGS) $(WARN_FLAGS) $(STD_FLAG) $(OPTI_FLAG) $(DEBUG_FLAG) +LDFLAGS := $(LDFLAGS) $(STRIP_FLAG) + +OBJDIR := $(BUILDDIR)/objs +$(shell mkdir -p $(OBJDIR)) + +SRCS=$(wildcard *.c) +OBJS=$(patsubst %.c,$(OBJDIR)/%.o,$(SRCS)) + +DEPDIR := $(BUILDDIR)/deps +$(shell mkdir -p $(DEPDIR)) +DEPFLAGS = -MT $@ -MMD -MP -MF $(DEPDIR)/$*.Td +POSTCOMPILE = mv -f $(DEPDIR)/$*.Td $(DEPDIR)/$*.d + +$(BINARY_NAME): $(OBJS) + @echo "[LD ] $@" + @$(LD) $(CFLAGS) $(LDFLAGS) $^ $(LDLIBS) -o $@ + +$(OBJDIR)/%.o: %.c $(DEPDIR)/%.d + @echo "[C ] $*" + @$(CC) $(DEPFLAGS) $(CFLAGS) -c $< -o $@ + @$(POSTCOMPILE) + +$(DEPDIR)/%.d: ; + +.PRECIOUS: $(DEPDIR)/%.d + +include $(wildcard $(patsubst %,$(DEPDIR)/%.d,$(basename $(SRCS)))) + +clean: + @echo "[CLN]" + -@rm -r $(BUILDDIR) + -@rm $(BINARY_NAME) + +disassemble: $(BINARY_NAME) + objdump -d $< | less + +symbols: $(BINARY_NAME) + objdump -t $< | sort | less diff --git a/rw/writer/writer.c b/rw/writer/writer.c new file mode 100644 index 0000000..8e73331 --- /dev/null +++ b/rw/writer/writer.c @@ -0,0 +1,24 @@ +// programme writer.c envoie un message sur le tube mypipe + +#include +#include +#include +#include + +int main() +{ + int fd; + char message[100]; + sprintf(message, "bonjour du writer [%d]\n", getpid()); + // Ouverture du tube mypipe en mode écriture + fd = open("mypipe", O_WRONLY); + perror("open failure"); + printf("ici writer[%d]\n", getpid()); + if (fd != -1) { + // Dépot d’un message dans le tube + write(fd, message, strlen(message) + 1); + } else + printf("désolé, le tube n'est pas disponible\n"); + close(fd); + return 0; +}