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From: preetham@ra.src.umd.edu (Preetham Gopalaswamy)
Newsgroups: comp.sys.hp
Subject: Problem with <dirent.h>
Message-ID: <35213@mimsy.umd.edu>
Date: 4 Jun 91 18:19:33 GMT
Sender: news@mimsy.umd.edu
Reply-To: preetham@ra.src.umd.edu (Preetham Gopalaswamy)
Organization: Neural Systems Lab., Univ. of Maryland, College Park, MD 20742
Lines: 118


I am trying to compile the MDQS spooling system for my HP 300's and 800's and
run into a problem at the compile stage in a program at the routine "readdir".
I vaguely recall somebody on this group mentioning some sort of problem with
using <dirent.h>, some incompatibility between SYSV and BSD.  Does anybody 
remember what the problem was.   I will include the portion of the code where
the problem is faced and the compiler generated errors.   Any help would be
highly appreciated.
I checked the definition of the structure "dirent" and it seemed like this
should work.  I could have missed something obvious though.

							Preetham Gopalaswamy



/*
 *              M U L T I - D E V I C E   Q U E U E I N G   S Y S T E M
 *
 *                                D R E C O V E R . C
 *
 *                              Douglas P. Kingston III
 *
 *                              Part of the MDQS Daemon
 */

#include <stdio.h>
#include "queue.h"              /* Includes <sys/types.h> */
#include <dirent.h>

#ifdef DIRBLKSIZ                /* 4BSD flavor assumed */
#define dirent  direct
#endif

extern  char *Newprefix;
extern  char *Qcntrldir;
extern  int Debug;
extern  int Waveoff;

/*
 *      R E C O V E R ( )
 *
 *      This function is called once when the daemon is started up.
 *      All jobs in the queue are enrolled into the daemons queues
 *      unless there is not enough space in which case, they are linked
 *      into the new directory which will cause them to be read later.
 */
recover()
{
        register struct dirent *dirp;
        register DIR    *dirf;
        char    newname[PATHSIZ];

        /*
         *      Read in all the requests in the control directory.
         *      If we run out of space, then just start linking
         *      to the Newdir so the daemon will accept them when
         *      it has space.
         */
recover()
{
        register struct dirent *dirp;
        register DIR    *dirf;
        char    newname[PATHSIZ];

        /*
         *      Read in all the requests in the control directory.
         *      If we run out of space, then just start linking
         *      to the Newdir so the daemon will accept them when
         *      it has space.
         */
        if(( dirf = opendir( Qcntrldir )) == NULL ) {
                complain( "recover() cannot open %s, recovery aborted.",
                        Qcntrldir );
                return;
        }

        while(( dirp = readdir( dirf )) != NULL ) {	<-------  LINE 51
                if( dirp->d_name[0] != 'Q')		<-------  LINE 52
                        continue;

debug("Recovering %s.", dirp->d_name);			<-------  LINE 55
                if( ! Waveoff ) {
                        enroll( dirp->d_name );		<-------  LINE 57
                        rmreq( Newprefix, dirp->d_name, QUIET );
                } else {
                        /* The daemon's queues are full, link to Newdir */
                        sprintf(newname, "%s/%s", Newprefix, dirp->d_name);
                        if( link( dirp->d_name, newname ) && Debug )
debug("Link failed (%s, %s).", newname, sys_errlist[errno] );
                }
        }
        closedir( dirf );
}


######################################################################



The compiler generated the following errors :

        cc -c -O -I. -I../h ../src/drecover.c
"../src/drecover.c", line 51: warning: incorrect structure pointer combination
"../src/drecover.c", line 52: undefined structure or union
"../src/drecover.c", line 52: warning: incorrect member use: d_name
"../src/drecover.c", line 55: undefined structure or union
"../src/drecover.c", line 55: warning: incorrect member use: d_name
"../src/drecover.c", line 57: undefined structure or union
"../src/drecover.c", line 57: warning: incorrect member use: d_name
"../src/drecover.c", line 58: undefined structure or union
"../src/drecover.c", line 58: warning: incorrect member use: d_name
"../src/drecover.c", line 61: undefined structure or union
"../src/drecover.c", line 61: warning: incorrect member use: d_name
"../src/drecover.c", line 62: undefined structure or union
"../src/drecover.c", line 62: warning: incorrect member use: d_name
*** Error code 1

Stop.