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| #include <stdio.h>
| #include <errno.h>
| #include <string.h>
| #include <unistd.h>
| #include <sys/types.h>
| #include <sys/stat.h>
| #include <fcntl.h>
|
| #define BUFSIZE 1024
| #define MSG_STR "Hello World\n"
|
| int main(int argc, char *argv[])
| {
| int fd = -1;
| int rv = -1;
| char buf[BUFSIZE];
|
| fd=open("test.txt", O_RDWR|O_CREAT|O_TRUNC, 0666);
| if(fd < 0)
| {
| perror("Open/Create file test.txt failure");
| return 0;
| }
| printf("Open file returned file descriptor [%d]\n", fd);
|
| if( (rv=write(fd, MSG_STR, strlen(MSG_STR))) < 0 )
| {
| printf("Write %d bytes into file failure: %s\n", rv, strerror(errno));
| goto cleanup;
| }
|
| //memset(buf, 0, sizeof(buf));
| if( (rv=read(fd, buf, sizeof(buf))) < 0 )
| {
| printf("Read data from file failure: %s\n", strerror(errno));
| goto cleanup;
| }
|
| printf("Read %d bytes data from file: %s\n", rv, buf);
|
| cleanup:
| close(fd);
|
| return 0;
| }
|
|
