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/*
* 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) */
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