/*

 * pdvn.c -- print device name functions for lsof library

 */

/*

 * Copyright 1997 Purdue Research Foundation, West Lafayette, Indiana

 * 47907.  All rights reserved.

 *

 * Written by Victor A. Abell

 *

 * This software is not subject to any license of the American Telephone

 * and Telegraph Company or the Regents of the University of California.

 *

 * Permission is granted to anyone to use this software for any purpose on

 * any computer system, and to alter it and redistribute it freely, subject

 * to the following restrictions:

 *

 * 1. Neither the authors nor Purdue University are responsible for any

 *    consequences of the use of this software.

 *

 * 2. The origin of this software must not be misrepresented, either by

 *    explicit claim or by omission.  Credit to the authors and Purdue

 *    University must appear in documentation and sources.

 *

 * 3. Altered versions must be plainly marked as such, and must not be

 *    misrepresented as being the original software.

 *

 * 4. This notice may not be removed or altered.

 */

#include "../machine.h"

#if	defined(USE_LIB_PRINTDEVNAME)

# if	!defined(lint)

static char copyright[] =

"@(#) Copyright 1997 Purdue Research Foundation.\nAll rights reserved.\n";

static char *rcsid = "$Id: pdvn.c,v 1.8 2008/10/21 16:12:36 abe Exp $";

# endif	/* !defined(lint) */

#include "../lsof.h"

#else	/* !defined(USE_LIB_PRINTDEVNAME) */

char pdvn_d1[] = "d"; char *pdvn_d2 = pdvn_d1;

#endif	/* defined(USE_LIB_PRINTDEVNAME) */

/*

 * To use this source file:

 *

 * 1. Define USE_LIB_PRINTDEVNAME, or both.

 *

 * 2. Define HAS_STD_CLONE to enable standard clone searches in

 *    printdevname().

 *

 * 3. Define HASBLDKDEV to enable block device processing.

 */

/*

 * Local definitions

 */

#define	LIKE_BLK_SPEC	"like block special"

#define	LIKE_CHR_SPEC	"like character special"

# if	defined(USE_LIB_PRINTDEVNAME)

/*

 * printdevname() - print block or character device name

 */

int

printdevname(dev, rdev, f, nty)

	dev_t *dev;			/* device */

	dev_t *rdev;			/* raw device */

	int f;				/* 1 = print trailing '\n' */

	int nty;			/* node type: N_BLK or N_CHR */

{

#  if	defined(HAS_STD_CLONE)

	struct clone *c;

#  endif	/* defined(HAS_STD_CLONE) */

	struct l_dev *dp;

	int r = 1;

#  if	defined(HASDCACHE)

printdevname_again:

#  endif	/* defined(HASDCACHE) */

# if	defined(HAS_STD_CLONE)

/*

 * Search for clone if this is a character device on the same device as

 * /dev (or /devices).

 */

	if ((nty == N_CHR) && Lf->is_stream && Clone && (*dev == DevDev)) {

	    r = 0;	/* Don't let lkupdev() rebuild the device cache,

			 * because when it has been rebuilt we want to

			 * search again for clones. */

	    readdev(0);

	    for (c = Clone; c; c = c->next) {

		if (GET_MAJ_DEV(*rdev) == GET_MIN_DEV(Devtp[c->dx].rdev)) {

#  if	defined(HASDCACHE)

		    if (DCunsafe && !Devtp[c->dx].v && !vfy_dev(&Devtp[c->dx]))

			goto printdevname_again;

#  endif	/* defined(HASDCACHE) */

		    safestrprt(Devtp[c->dx].name, stdout, f);

		    return(1);

		}

	    }

	}

# endif	/* defined(HAS_STD_CLONE) */

/*

 * Search appropriate device table for a full match.

 */

# if	defined(HASBLKDEV)

	if (nty == N_BLK)

	    dp = lkupbdev(dev, rdev, 1, r);

	else

# endif	/* defined(HASBLKDEV) */

	dp = lkupdev(dev, rdev, 1, r);

	if (dp) {

	    safestrprt(dp->name, stdout, f);

	    return(1);

	}

/*

 * Search device table for a match without inode number and dev.

 */

# if	defined(HASBLKDEV)

	if (nty == N_BLK)

	    dp = lkupbdev(&DevDev, rdev, 0, r);

	else

# endif	/* defined(HASBLKDEV) */

	dp = lkupdev(&DevDev, rdev, 0, r);

	if (dp) {

	/*

	 * A match was found.  Record it as a name column addition.

	 */

	    char *cp, *ttl;

	    int len;

	    ttl = (nty == N_BLK) ? LIKE_BLK_SPEC : LIKE_CHR_SPEC;

	    len = (int)(1 + strlen(ttl) + 1 + strlen(dp->name) + 1);

	    if (!(cp = (char *)malloc((MALLOC_S)(len + 1)))) {

		(void) fprintf(stderr, "%s: no nma space for: (%s %s)\n",

		    Pn, ttl, dp->name);

		Exit(1);

	    }

	    (void) snpf(cp, len + 1, "(%s %s)", ttl, dp->name);

	    (void) add_nma(cp, len);

	    (void) free((MALLOC_P *)cp);

	    return(0);

	}

# if	defined(HASDCACHE)

/*

 * We haven't found a match.

 *

 * If rebuilding the device cache was suppressed and the device cache is

 * "unsafe," rebuild it.

 */

	if (!r && DCunsafe) {

	    (void) rereaddev();

	    goto printdevname_again;

	}

# endif	/* defined(HASDCACHE) */

	return(0);

}

#endif	/* defined(USE_LIB_PRINTDEVNAME) */