I'm learning about file descriptors and I wrote this code:
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
int fdrd, fdwr, fdwt;
char c;
main (int argc, char *argv[]) {
if((fdwt = open("output", O_CREAT, 0777)) == -1) {
perror("Error opening the file:");
exit(1);
}
char c = 'x';
if(write(fdwt, &c, 1) == -1) {
perror("Error writing the file:");
}
close(fdwt);
exit(0);
}
, but I'm getting: Error writing the file:: Bad file descriptor
I don't know what could be wrong, since this is a very simple example.
Try this:
open("output", O_CREAT|O_WRONLY, 0777)