IPC

c/ipc/Makefile

@@ -0,0 +1,147 @@
+# Makefile generated by command: smake.sh -t makelog -t pipes -t printns -t typeclient -t typeserver
+# This file is generated with smake.sh.
+# You can use this make file with instruction make to
+# use one of build mode: debug, profile, develop, release.
+# No need to call make clean if You make with other mode,
+# because the Makefile containes rules for automatically clean.
+# Some usage examples:
+# make # default mode is debug
+# CFLAGS="-O2 -march=core2 -mtune=core2 -msse4.1 -mfpmath=sse -fomit-frame-pointer -pipe" LDFLAGS="-Wl,-O1" make mode=develop
+# CFLAGS="-O2 -march=amdfam10 -mtune=amdfam10 -msse4a --mfpmath=sse -fomit-frame-pointer -pipe" LDFLAGS="-Wl,-O1" make mode=profile
+# CFLAGS="-O2 -march=k6-2 -mtune=k6-2 -m3dnow --mfpmath=387 -fomit-frame-pointer -pipe" LDFLAGS="-Wl,-O1" make mode=release
+# Report bugs to <mecareful@gmail.com>
+
+#_________________________________
+#          ENVIRONMENT           |
+#________________________________|
+TARGET0=makelog
+TARGET1=pipes
+TARGET2=printns
+TARGET3=typeclient
+TARGET4=typeserver
+TARGETS= $(TARGET0) $(TARGET1) $(TARGET2) $(TARGET3) $(TARGET4)
+CC=cc
+CXX=c++
+LIBS= 
+SRC=
+INCLUDES= 
+#________________________________________
+#      BUILD SCRIPT (don't change)      |
+#_______________________________________|
+ifeq ($(mode),)
+	mode = debug
+endif
+ifeq ($(mode),debug)
+	CFLAGS := -O0 -g -DDEBUG -std=gnu99 -pedantic -Wextra -Wconversion $(CFLAGS)
+	LDFLAGS := $(LDFLAGS)
+endif
+ifeq ($(mode),profile)
+	CFLAGS := -O0 -g -DDEBUG -p -ftest-coverage -Wcoverage-mismatch $(CFLAGS)
+	LDFLAGS := -g -p $(LDFLAGS)
+endif
+ifeq ($(mode),develop)
+	CFLAGS := -O2 -g -DDEBUG $(CFLAGS)
+	LDFLAGS := -O1 $(LDFLAGS)
+endif
+ifeq ($(mode),release)
+	CFLAGS := -O2 $(CFLAGS)
+	LDFLAGS := -O1 $(LDFLAGS)
+endif
+
+CFLAGS += -Wall $(INCLUDES)
+LDFLAGS += -Wall $(LIBS)
+
+all:
+	@make change_make_options &>/dev/null
+	+make $(TARGETS)
+
+ifneq ($(mode),debug)
+ifneq ($(mode),profile)
+ifneq ($(mode),develop)
+ifneq ($(mode),release)
+	@echo "Invalid build mode."
+	@echo "Please use 'make mode=release', 'make mode=develop', 'make mode=profile' or 'make mode=debug'"
+	@exit 1
+endif
+endif
+endif
+endif
+	@echo ".........................."
+	@echo "Building on "$(mode)" mode "
+	@echo "CFLAGS=$(CFLAGS)"
+	@echo "LDFLAGS=$(LDFLAGS)"
+	@echo ".........................."
+
+OLD_BUILD_MODE=$(shell grep ^MODE make_options.out 2>/dev/null | sed 's~^MODE=~~')
+OLD_BUILD_CFLAGS=$(shell grep ^CFLAGS make_options.out 2>/dev/null | sed 's~^CFLAGS=~~')
+OLD_BUILD_LDFLAGS=$(shell grep ^LDFLAGS make_options.out 2>/dev/null | sed 's~^LDFLAGS=~~')
+change_make_options:
+ifneq ($(mode)|$(CFLAGS)|$(LDFLAGS), $(OLD_BUILD_MODE)|$(OLD_BUILD_CFLAGS)|$(OLD_BUILD_LDFLAGS))
+	@echo CLEANING...
+	@make clean
+	@echo "MODE=$(mode)" > make_options.out
+	@echo "CFLAGS=$(CFLAGS)" >> make_options.out
+	@echo "LDFLAGS=$(LDFLAGS)" >> make_options.out
+endif
+
+%.o :
+	$(CC) -c $(CFLAGS) $(SRC) -o $@ $<
+
+clean:
+	$(RM) *.o *.out callgrind.out.* *.gcno $(TARGETS)
+
+.PHONY: all change_make_options clean
+
+#_________________________________
+#           R U L E S            |
+#________________________________|
+target_objs0 = \
+	makelog.o
+
+$(TARGET0): $(target_objs0)
+	$(CC) $(LDFLAGS) -o $@ $(target_objs0)
+
+
+target_objs1 = \
+	pipes.o
+
+$(TARGET1): $(target_objs1)
+	$(CC) $(LDFLAGS) -o $@ $(target_objs1)
+
+
+target_objs2 = \
+	printns.o
+
+$(TARGET2): $(target_objs2)
+	$(CC) $(LDFLAGS) -o $@ $(target_objs2)
+
+
+target_objs3 = \
+	typeclient.o
+
+$(TARGET3): $(target_objs3)
+	$(CC) $(LDFLAGS) -o $@ $(target_objs3)
+
+
+target_objs4 = \
+	typeserver.o
+
+$(TARGET4): $(target_objs4)
+	$(CC) $(LDFLAGS) -o $@ $(target_objs4)
+
+
+makelog.o: \
+	makelog.c
+
+pipes.o: \
+	pipes.c
+
+printns.o: \
+	printns.c
+
+typeclient.o: \
+	typeclient.c
+
+typeserver.o: \
+	typeserver.c
+

c/ipc/makelog.c

@@ -0,0 +1,37 @@
+/*
+  Popen/Pclose Demo by Andrei Borovsky <borovsky@tochka.ru>.
+  This code is freeware. 
+*/
+
+#include <stdio.h>
+#include <errno.h>
+
+#define BUF_SIZE 0x100
+
+int main(int argc, char * argv[])
+{
+  FILE * f;
+  FILE * o;
+  int len;
+  char buf[BUF_SIZE];
+  if (argc != 2)
+  {
+     printf("использование: makelog \"<command>\"\n");
+     return -1;
+  }
+  f = popen(argv[1], "r");
+  if (f == NULL)
+  {
+    perror("ошибка:\n");
+    return -1;
+  }
+  o = fopen("log.txt", "w");
+  while ((len = fread(buf, 1, BUF_SIZE, f)) != 0)
+  {
+     write(1, buf, len);
+     fwrite(buf, 1, len, o);
+  }
+  pclose(f);
+  fclose(o);
+  return 0;
+} 

c/ipc/pipes.c

@@ -0,0 +1,33 @@
+/*
+  Anonymous Pipes Demo by Andrei Borovsky <borovsky@tochka.ru>.
+  This code is freeware. 
+*/
+
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+
+int main (int argc, char * argv[])
+{
+  int pipedes[2];
+  pid_t pid;
+  pipe(pipedes);
+  pid = fork();
+  if ( pid > 0 )  
+  {  
+    char  *str = "String passed via pipe\n";
+    close(pipedes[0]);
+    write(pipedes[1], (void *) str, strlen(str) + 1); 
+    close(pipedes[1]);
+  }  
+  else
+  {
+    char buf[1024];
+    int len;
+    close(pipedes[1]);
+    while ((len = read(pipedes[0], buf, 1024)) != 0)
+    write(2, buf, len); 
+    close(pipedes[0]);	
+  }
+  return 0;
+}

c/ipc/printns.c

@@ -0,0 +1,35 @@
+/*
+  Child process output redirection Demo by Andrei Borovsky <borovsky@tochka.ru>.
+  This code is freeware. 
+*/
+
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#define BUF_SIZE 0x100
+
+int main (int argc, char * argv[])
+{
+  int pipedes[2];
+  pid_t pid;
+  pipe(pipedes);
+  pid = fork();
+  if ( pid > 0 )
+  {
+    char buf[BUF_SIZE];
+    int len;
+    close(pipedes[1]);
+    while ((len = read(pipedes[0], buf, BUF_SIZE)) > 0)
+      write(1, buf, len); 
+    close(pipedes[0]);
+  }
+  else
+  {
+    close(pipedes[0]); 
+    dup2(pipedes[1], 1);
+    execve("/bin/netstat", NULL, NULL);
+  } 
+  return 0;
+}				

c/ipc/typeclient.c

@@ -0,0 +1,23 @@
+/*
+  Named Pipe Demo by Andrei Borovsky <borovsky@tochka.ru>.
+  This code is freeware. 
+*/
+
+#include <stdio.h>
+
+#define FIFO_NAME "./fifofile"
+
+int main ()
+{
+  FILE * f;
+  char ch;
+  f = fopen(FIFO_NAME, "r");
+  do
+  {
+    ch = fgetc(f);
+    putchar(ch);
+  } while (ch != 'q');
+  fclose(f);
+  unlink(FIFO_NAME);
+  return 0;
+}

c/ipc/typeserver.c

@@ -0,0 +1,32 @@
+/*
+  Named Pipe Demo by Andrei Borovsky <borovsky@tochka.ru>.
+  This code is freeware. 
+*/
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#define FIFO_NAME "./fifofile" 
+
+int main(int argc, char * argv[])
+{
+  FILE * f;
+  char ch;
+  mkfifo(FIFO_NAME, 0600); 
+  f = fopen(FIFO_NAME, "w");
+  if (f == NULL) 
+  { 
+    printf("Не удалось открыть файл\n");
+    return -1;
+  }
+  do
+  {
+    ch = getchar();
+    fputc(ch, f);
+    if (ch == 10) fflush(f);
+  } while (ch != 'q');
+  fclose(f);
+  unlink(FIFO_NAME);
+  return 0;
+}