Errata

Section 17.1.2 discusses the PerlObjCBridge and says

"You can read the documentation for this module with perldoc PerlObjCBridge"

I think you need "man PerlObjCBridge" to see the docs. "perldoc PerlObjCBridge" doesn't give you any documentation.

Note from the Author or Editor:
Thanks for the correction.

perldoc PerlObjCBridge should work, but there may be some configurations where it doesn't (it does work on my 10.5.5 system). However, in cases where perldoc is misbehaving, man will do the trick.

The mount command is not mentioned on page 68 as indicated in the Index.

Note from the Author or Editor:
"mount" entries should be reviewed for next version of the index.

This code example doesnt work. There are several errors. The corrected code is shown below.


#include <stdio.h>
#include <stdlib.h>
#include <security/pam_appl.h>
#include <security/openpam.h>
#include <security/pam_constants.h>

int main ( int argc, char *argv[] ) {

int retval;
static struct pam_conv pam_conv;
pam_conv.conv = misc_conv;
pam_handle_t *pamh = NULL ;
const char *user = NULL;

if ( argc == 2 )
user = argv[1];
if (!user ) {
fprintf( stderr, "Usage: pam_example <username>\n" );
exit( 1 ) ;
}

retval = pam_start("pam_example", user, &pam_conv, &pamh );
if ( retval != PAM_SUCCESS ) {
fprintf( stderr, "could not start pam, %s \n", pam_strerror(pamh, retval));
exit( 1 );
}

the /etc/pam.d/pam_example file as shown on page 93 is also wrong.
It should look like

auth required pam_launchd.so.2
account required pam_permit.so.2
password required pam_deny.so.2

Note from the Author or Editor:
Thank you for the correction; I have tested it and it indeed fixes the problem. Note for others reading this: the code shown replaces most of the example, but you'll still need the following lines for it to compile:

/* Try to authenticate the user. This could cause Linux-PAM
* to prompt the user for a password.
*/
retval = pam_authenticate(pamh, 0);
if (retval == PAM_SUCCESS)
printf("Success.\n");
else
fprintf(stderr, "Failure: %s\n", pam_strerror(pamh, retval));

/* Shut down Linux-PAM. Return with an error if
* something goes wrong.
*/
return pam_end(pamh, retval) == PAM_SUCCESS ? 0 : 1;
}