Date: Tue, 30 Jun 2009 19:19:24 +0100 From: Igor Mozolevsky <igor@hybrid-lab.co.uk> To: Alexander Best <alexbestms@math.uni-muenster.de> Cc: freebsd-hackers@freebsd.org Subject: Re: c question: *printf'ing arrays Message-ID: <a2b6592c0906301119t4e4fe891ha07895c27b6efec0@mail.gmail.com> In-Reply-To: <permail-20090630180321f7e55a9d00002466-a_best01@message-id.uni-muenster.de> References: <a2b6592c0906301100g55827437o66e09d6ca1269cdd@mail.gmail.com> <permail-20090630180321f7e55a9d00002466-a_best01@message-id.uni-muenster.de>
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2009/6/30 Alexander Best <alexbestms@math.uni-muenster.de>:
> should be stdout.
>
>
> struct Header *hdr = rom;
>
> int new_fd = open("/dev/stdout", O_RDWR);
>
> printf("SIZE: %d\n",sizeof(*hdr));
>
> write(new_fd, hdr, sizeof(*hdr));
>
> close(new_fd);
You should really be checking what open returns, opening /dev/stdout
for reading is a bit weird not sure if that would work, and most
likely it's already open... Just use fileno(...):-
#include <unistd.h>
#include <stdio.h>
int main(void) {
write(fileno(stdout), "Hello world!\n", 13);
return 0;
}
Cheers,
--
Igor
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