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Consider the following code and MAP the file to which each fd points at the end ...
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Consider the following code and MAP the file to which each fd points at the end of the code. Assume that files/folders exist when needed with proper permissions and open() calls work.
int main(int argc, char *argv[]) { int fd1, fd2 = 1, fd3 = 1, fd4 = 1; fd1 = open("/tmp/1", O_WRONLY | O_CREAT, S_IRUSR|S_IWUSR); fd2 = open("/tmp/2", O_RDDONLY); fd3 = open("/tmp/3", O_WRONLY | O_CREAT, S_IRUSR|S_IWUSR); close(0); close(1); dup(fd2); dup(fd3); close(fd3); dup2(fd2, fd4); printf("%d %d %d %d\n", fd1, fd2, fd3, fd4); return 0;}