Hi! This is a GRSecurity issue, to protect system integrity, it forbids direct I/O access.
Luis Correia Bering uClibc Team Member PGP Fingerprint: BC44 D7DA 5A17 F92A CA21 9ABE DFF0 3540 2322 21F6 Key Server: http://pgp.mit.edu > -----Original Message----- > From: Felix Theodor [mailto:[EMAIL PROTECTED] > Sent: Tuesday, July 27, 2004 1:08 PM > To: [EMAIL PROTECTED] > Subject: [leaf-user] ioperm > > Hello, > > I try to run this example in my leaf box. > And I get the message: ioperm: opperation not permit > > > thank you for any advice > felix > > > /* > * example.c: very simple example of port I/O > * > * This code does nothing useful, just a port write, a > pause, > * and a port read. Compile with `gcc -O2 -o example > example.c', > * and run as root with `./example'. > */ > > #include <stdio.h> > #include <unistd.h> > #include <asm/io.h> > > #define BASEPORT 0x378 /* lp1 */ > > int main() > { > /* Get access to the ports */ > if (ioperm(BASEPORT, 2, 1)) {perror("ioperm"); > exit(1);} > > /* Set the data signals (D0-7) of the port to all > low (0) */ > outb(0, BASEPORT); > > /* Sleep for a while (100 ms) */ > usleep(100000); > > /* Read from the status port (BASE+1) and display > the result */ > printf("status: %d\n", inb(BASEPORT + 1)); > > /* We don't need the ports anymore */ > if (ioperm(BASEPORT, 3, 0)) {perror("ioperm"); > exit(1);} > > exit(0); > } > > /* end of example.c */ > > > > > > > > > ___________________________________________________________ > Gesendet von Yahoo! Mail - Jetzt mit 100MB Speicher kostenlos > - Hier anmelden: http://mail.yahoo.de > > > ------------------------------------------------------- > This SF.Net email is sponsored by BEA Weblogic Workshop > FREE Java Enterprise J2EE developer tools! > Get your free copy of BEA WebLogic Workshop 8.1 today. > http://ads.osdn.com/?ad_id=4721&alloc_id=10040&op=click > -------------------------------------------------------------- > ---------- > leaf-user mailing list: [EMAIL PROTECTED] > https://lists.sourceforge.net/lists/listinfo/leaf-user > SR FAQ: http://leaf-project.org/pub/doc/docmanager/docid_1891.html > ------------------------------------------------------- This SF.Net email is sponsored by BEA Weblogic Workshop FREE Java Enterprise J2EE developer tools! Get your free copy of BEA WebLogic Workshop 8.1 today. http://ads.osdn.com/?ad_id=4721&alloc_id=10040&op=click ------------------------------------------------------------------------ leaf-user mailing list: [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/leaf-user SR FAQ: http://leaf-project.org/pub/doc/docmanager/docid_1891.html
