添加了proc_create方式的用户空间代码读写程序...

study/proc/proc_create/Makefile

@@ -4,8 +4,8 @@ obj-m := jif.o
 
 else
 
-KERNELDIR ?= /lib/modules/$(shell uname -r)/build
-#KERNELDIR ?= /home/gatieme/Work/Kernel/linux-headers-3.14-desktop/
+#KERNELDIR ?= /lib/modules/$(shell uname -r)/build
+KERNELDIR ?= /home/gatieme/Work/Kernel/linux-headers-3.14-desktop/
 PWD := $(shell pwd)
 
 all:

study/proc/proc_create/test.c

@@ -0,0 +1,61 @@
+/*************************************************************************
+    > File Name: test.c
+    > Author: gatieme
+    > Created Time: 2016年05月24日 星期二 19时45分38秒
+ ************************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <time.h>
+#include <sys/time.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+
+#define PROC_FILE   "/proc/jif"
+#define MAX_LINE    81
+
+int main( )
+{
+	int             ret;
+	int             procFile;
+	char            buff[MAX_LINE];
+
+    //wait for ack signal
+	procFile = open(PROC_FILE, O_RDWR);
+	if(procFile == -1)
+	{
+		perror("Fail to open "PROC_FILE);
+		exit(-1);
+	}
+    else
+    {
+        printf("Open success...\n");
+    }
+
+    if((ret = write(procFile, "hello", strlen("hello"))) == -1)
+    {
+        perror("Fail to read "PROC_FILE);
+    }
+    else
+    {
+        printf("wriet success\n");
+    }
+
+    bzero(buff, sizeof(buff));
+    if((ret = read(procFile, buff, MAX_LINE)) == -1)
+    {
+        perror("Fail to read "PROC_FILE);
+    }
+    else
+    {
+        printf("buff = %s\n", buff);
+    }
+
+    close(procFile);
+}

study/proc/proc_create/test2.c

@@ -0,0 +1,59 @@
+/*************************************************************************
+    > File Name: test.c
+    > Author: gatieme
+    > Created Time: 2016年05月24日 星期二 19时45分38秒
+ ************************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <time.h>
+#include <sys/time.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+
+#define PROC_FILE   "/proc/jif"
+#define MAX_LINE    81
+
+int main( )
+{
+	int             ret;
+	int             count;
+	int             procFile;
+	char            buff[MAX_LINE];
+
+    bzero(buff, sizeof(buff));
+    sprintf(buff, "echo \"hello\" > %s", PROC_FILE);
+    printf("%s\n", buff);
+	system(buff);
+    printf("write success...\n");
+    //wait for ack signal
+	procFile = open(PROC_FILE, O_RDONLY);
+	if(procFile == -1)
+	{
+		perror("Fail to open "PROC_FILE);
+		exit(-1);
+	}
+    else
+    {
+        printf("Open success...\n");
+    }
+
+	bzero(buff, sizeof(buff));
+    ret = read(procFile, buff, MAX_LINE);
+    if(ret == -1)
+    {
+        perror("Fail to read " PROC_FILE);
+    }
+    else
+    {
+        printf("buff = %s\n", buff);
+    }
+
+    close(procFile);
+}