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| #include <stdio.h>
| #include <string.h>
| #include <errno.h>
| #include <unistd.h>
| #include <sys/types.h>
| #include <sys/stat.h>
| #include <fcntl.h>
|
| int main(int argc, char *argv)
| {
| int fd = -1;
|
| fd = open("std.txt", O_RDWR|O_CREAT|O_TRUNC, 0666);
| if(fd < 0)
| {
| printf("Open file failure: %s\n", strerror(errno));
| return 1;
| }
|
| dup2(fd, STDIN_FILENO);
| dup2(fd, STDOUT_FILENO);
| dup2(fd, STDERR_FILENO);
|
| printf("fd=%d\n", fd);
|
| close(fd);
|
| return 0;
| }
|
|
