| /* |
| * ddev.c - DEC OSF/1, Digital UNIX, Tru64 UNIX device support functions for |
| * lsof |
| */ |
| |
| |
| /* |
| * Copyright 1994 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. |
| */ |
| |
| #ifndef lint |
| static char copyright[] = |
| "@(#) Copyright 1994 Purdue Research Foundation.\nAll rights reserved.\n"; |
| static char *rcsid = "$Id: ddev.c,v 1.17 2005/08/12 15:35:14 abe Exp $"; |
| #endif |
| |
| #include "lsof.h" |
| |
| |
| /* |
| * Local static values |
| */ |
| |
| #if defined(USELOCALREADDIR) |
| static struct stat Dirsb; |
| #endif /* defined(USELOCALREADDIR) */ |
| |
| |
| /* |
| * Local definitions |
| */ |
| |
| #define LIKE_BLK_SPEC "like block special" |
| #define LIKE_CHR_SPEC "like character special" |
| |
| |
| /* |
| * Local function prototypes |
| */ |
| |
| _PROTOTYPE(static int rmdupdev,(struct l_dev ***dp, int n, char *nm)); |
| |
| |
| #if defined(HASDCACHE) |
| /* |
| * clr_sect() - clear cached clone and pseudo sections |
| */ |
| |
| void |
| clr_sect() |
| { |
| struct clone *c, *c1; |
| |
| if (Clone) { |
| for (c = Clone; c; c = c1) { |
| c1 = c->next; |
| (void) free((FREE_P *)c); |
| } |
| Clone = (struct clone *)NULL; |
| } |
| } |
| #endif /* defined(HASDCACHE) */ |
| |
| |
| /* |
| * printdevname() - print block and character device names |
| */ |
| |
| int |
| printdevname(dev, rdev, f, nty) |
| dev_t *dev; /* device */ |
| dev_t *rdev; /* raw device */ |
| int f; /* 1 = follow with '\n' */ |
| int nty; /* node type: N_BLK or N_CHR */ |
| { |
| struct clone *c; |
| struct l_dev *dp; |
| |
| readdev(0); |
| /* |
| * Search for clone. |
| */ |
| |
| #if defined(HASDCACHE) |
| |
| printdevname_again: |
| |
| #endif /* defined(HASDCACHE) */ |
| |
| if ((nty == N_CHR) && Clone && HAVECLONEMAJ && (*dev == DevDev) |
| && (GET_MAJ_DEV(*rdev) == CLONEMAJ)) |
| { |
| for (c = Clone; c; c = c->next) { |
| if (Devtp[c->dx].rdev == *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); |
| } |
| } |
| } |
| /* |
| * Search device table for a full match. |
| */ |
| |
| #if defined(HASBLKDEV) |
| if (nty == N_BLK) |
| dp = lkupbdev(dev, rdev, 1, 0); |
| else |
| #endif /* defined(HASBLKDEV) */ |
| |
| dp = lkupdev(dev, rdev, 1, 0); |
| 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, 0); |
| else |
| #endif /* defined(HASBLKDEV) */ |
| |
| dp = lkupdev(&DevDev, rdev, 0, 0); |
| if (dp) { |
| |
| /* |
| * A raw device 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((FREE_P *)cp); |
| return(0); |
| } |
| |
| #if defined(HASDCACHE) |
| /* |
| * If the device cache is "unsafe" and we haven't found any match, reload |
| * the device cache. |
| */ |
| if (DCunsafe) { |
| (void) rereaddev(); |
| goto printdevname_again; |
| } |
| #endif /* defined(HASDCACHE) */ |
| |
| return(0); |
| } |
| |
| |
| /* |
| * readdev() - read names, modes and device types of everything in /dev |
| */ |
| |
| void |
| readdev(skip) |
| int skip; /* skip device cache read if 1 */ |
| { |
| #if defined(HASDCACHE) |
| int dcrd; |
| #endif /* defined(HASDCACHE) */ |
| |
| struct clone *c; |
| DIR *dfp; |
| struct DIRTYPE *dp; |
| char *fp = (char *)NULL; |
| int i = 0; |
| |
| #if defined(HASBLKDEV) |
| int j = 0; |
| #endif /* defined(HASBLKDEV) */ |
| |
| MALLOC_S nl; |
| char *path = (char *)NULL; |
| MALLOC_S pl; |
| struct stat sb; |
| |
| if (Sdev) |
| return; |
| |
| #if defined(HASDCACHE) |
| /* |
| * Read device cache, as directed. |
| */ |
| if (!skip) { |
| if (DCstate == 2 || DCstate == 3) { |
| if ((dcrd = read_dcache()) == 0) |
| return; |
| } |
| } else |
| dcrd = 1; |
| #endif /* defined(HASDCACHE) */ |
| |
| Dstk = (char **)NULL; |
| Dstkn = Dstkx = 0; |
| (void) stkdir("/dev"); |
| /* |
| * Unstack the next /dev or /dev/<subdirectory> directory. |
| */ |
| while (--Dstkx >= 0) { |
| if (!(dfp = OpenDir(Dstk[Dstkx]))) { |
| |
| #if defined(WARNDEVACCESS) |
| if (!Fwarn) { |
| (void) fprintf(stderr, "%s: WARNING: can't open: ", Pn); |
| safestrprt(Dstk[Dstkx], stderr, 1); |
| } |
| #endif /* defined(WARNDEVACCESS) */ |
| |
| (void) free((FREE_P *)Dstk[Dstkx]); |
| Dstk[Dstkx] = (char *)NULL; |
| continue; |
| } |
| if (path) { |
| (void) free((FREE_P *)path); |
| path = (char *)NULL; |
| } |
| if (!(path = mkstrcat(Dstk[Dstkx], -1, "/", 1, (char *)NULL, -1, |
| &pl))) |
| { |
| (void) fprintf(stderr, "%s: no space for: ", Pn); |
| safestrprt(Dstk[Dstkx], stderr, 1); |
| Exit(1); |
| } |
| (void) free((FREE_P *)Dstk[Dstkx]); |
| Dstk[Dstkx] = (char *)NULL; |
| /* |
| * Scan the directory. |
| */ |
| for (dp = ReadDir(dfp); dp; dp = ReadDir(dfp)) { |
| if (dp->d_ino == 0 || dp->d_name[0] == '.') |
| continue; |
| /* |
| * Form the full path name and get its status. |
| */ |
| if (fp) { |
| (void) free((FREE_P *)fp); |
| fp = (char *)NULL; |
| } |
| if (!(fp = mkstrcat(path, (int)pl, dp->d_name, dp->d_namlen, |
| (char *)NULL, -1, (MALLOC_S *)NULL))) |
| { |
| (void) fprintf(stderr, "%s: no space for: ", Pn); |
| safestrprt(path, stderr, 0); |
| safestrprt(dp->d_name, stderr, 1); |
| Exit(1); |
| } |
| |
| #if defined(USE_STAT) |
| if (stat(fp, &sb) != 0) |
| #else /* !defined(USE_STAT) */ |
| if (lstat(fp, &sb) != 0) |
| #endif /* defined(USE_STAT) */ |
| |
| { |
| if (errno == ENOENT) /* symbolic link to nowhere? */ |
| continue; |
| |
| #if defined(WARNDEVACCESS) |
| if (!Fwarn) { |
| int errno_save = errno; |
| |
| (void) fprintf(stderr, "%s: can't stat ", Pn); |
| safestrprt(fp, stderr, 0); |
| (void) fprintf(stderr, ": %s\n", strerror(errno_save)); |
| } |
| #endif /* defined(WARNDEVACCESS) */ |
| |
| continue; |
| } |
| /* |
| * If it's a subdirectory, stack its name for later processing. |
| */ |
| if ((sb.st_mode & S_IFMT) == S_IFDIR) { |
| (void) stkdir(fp); |
| continue; |
| } |
| if ((sb.st_mode & S_IFMT) == S_IFCHR) { |
| |
| /* |
| * Save character device information in Devtp[]. |
| */ |
| if (i >= Ndev) { |
| Ndev += DEVINCR; |
| if (!Devtp) |
| Devtp = (struct l_dev *)malloc( |
| (MALLOC_S)(sizeof(struct l_dev)*Ndev)); |
| else |
| Devtp = (struct l_dev *)realloc( |
| (MALLOC_P *)Devtp, |
| (MALLOC_S)(sizeof(struct l_dev)*Ndev)); |
| if (!Devtp) { |
| (void) fprintf(stderr, |
| "%s: no space for character device\n", Pn); |
| Exit(1); |
| } |
| } |
| Devtp[i].inode = (INODETYPE)sb.st_ino; |
| if (!(Devtp[i].name = mkstrcpy(fp, (MALLOC_S *)NULL))) { |
| (void) fprintf(stderr, "%s: no space for: ", Pn); |
| safestrprt(fp, stderr, 1); |
| Exit(1); |
| } |
| Devtp[i].rdev = sb.st_rdev; |
| Devtp[i].v = 0; |
| /* |
| * Save clone device location. |
| */ |
| if (HAVECLONEMAJ |
| && GET_MAJ_DEV(Devtp[i].rdev) == CLONEMAJ) |
| { |
| if (!(c = (struct clone *)malloc(sizeof(struct clone)))) |
| { |
| (void) fprintf(stderr, |
| "%s: no space for clone device: ", Pn); |
| safestrprt(fp, stderr, 1); |
| Exit(1); |
| } |
| c->dx = i; |
| c->next = Clone; |
| Clone = c; |
| } |
| i++; |
| } |
| |
| #if defined(HASBLKDEV) |
| if ((sb.st_mode & S_IFMT) == S_IFBLK) { |
| |
| /* |
| * Save block device information in BDevtp[]. |
| */ |
| if (j >= BNdev) { |
| BNdev += DEVINCR; |
| if (!BDevtp) |
| BDevtp = (struct l_dev *)malloc( |
| (MALLOC_S)(sizeof(struct l_dev)*BNdev)); |
| else |
| BDevtp = (struct l_dev *)realloc( |
| (MALLOC_P *)BDevtp, |
| (MALLOC_S)(sizeof(struct l_dev)*BNdev)); |
| if (!BDevtp) { |
| (void) fprintf(stderr, |
| "%s: no space for block device\n", Pn); |
| Exit(1); |
| } |
| } |
| BDevtp[j].inode = (INODETYPE)sb.st_ino; |
| BDevtp[j].name = fp; |
| fp = (char *)NULL; |
| BDevtp[j].rdev = sb.st_rdev; |
| BDevtp[j].v = 0; |
| j++; |
| } |
| #endif /* defined(HASBLKDEV) */ |
| |
| } |
| (void) CloseDir(dfp); |
| } |
| /* |
| * Free any allocated space. |
| */ |
| if (Dstk) { |
| (void) free((FREE_P *)Dstk); |
| Dstk = (char **)NULL; |
| Dstkn = Dstkx = 0; |
| } |
| if (fp) |
| (void) free((FREE_P *)fp); |
| if (path) |
| (void) free((FREE_P *)path); |
| /* |
| * Reduce the BDevtp[] (optional) and Devtp[] tables to their minimum |
| * sizes; allocate and build sort pointer lists; and sort the tables by |
| * device number. |
| */ |
| |
| #if defined(HASBLKDEV) |
| if (BNdev) { |
| if (BNdev > j) { |
| BNdev = j; |
| BDevtp = (struct l_dev *)realloc((MALLOC_P *)BDevtp, |
| (MALLOC_S)(sizeof(struct l_dev) * BNdev)); |
| } |
| if (!(BSdev = (struct l_dev **)malloc( |
| (MALLOC_S)(sizeof(struct l_dev *) * BNdev)))) |
| { |
| (void) fprintf(stderr, |
| "%s: no space for block device sort pointers\n", Pn); |
| Exit(1); |
| } |
| for (j = 0; j < BNdev; j++) { |
| BSdev[j] = &BDevtp[j]; |
| } |
| (void) qsort((QSORT_P *)BSdev, (size_t)BNdev, |
| (size_t)sizeof(struct l_dev *), compdev); |
| BNdev = rmdupdev(&BSdev, BNdev, "block"); |
| } |
| |
| # if !defined(NOWARNBLKDEV) |
| else { |
| if (!Fwarn) |
| (void) fprintf(stderr, |
| "%s: WARNING: no block devices found\n", Pn); |
| } |
| # endif /* !defined(NOWARNBLKDEV) */ |
| #endif /* defined(HASBLKDEV) */ |
| |
| if (Ndev) { |
| if (Ndev > i) { |
| Ndev = i; |
| Devtp = (struct l_dev *)realloc((MALLOC_P *)Devtp, |
| (MALLOC_S)(sizeof(struct l_dev) * Ndev)); |
| } |
| if (!(Sdev = (struct l_dev **)malloc( |
| (MALLOC_S)(sizeof(struct l_dev *) * Ndev)))) |
| { |
| (void) fprintf(stderr, |
| "%s: no space for character device sort pointers\n", Pn); |
| Exit(1); |
| } |
| for (i = 0; i < Ndev; i++) { |
| Sdev[i] = &Devtp[i]; |
| } |
| (void) qsort((QSORT_P *)Sdev, (size_t)Ndev, |
| (size_t)sizeof(struct l_dev *), compdev); |
| Ndev = rmdupdev(&Sdev, Ndev, "char"); |
| } else { |
| (void) fprintf(stderr, "%s: no character devices found\n", Pn); |
| Exit(1); |
| } |
| |
| #if defined(HASDCACHE) |
| /* |
| * Write device cache file, as required. |
| */ |
| if (DCstate == 1 || (DCstate == 3 && dcrd)) |
| write_dcache(); |
| #endif /* defined(HASDCACHE) */ |
| |
| } |
| |
| |
| #if defined(USELOCALREADDIR) |
| /* |
| * Copyright (c) 1983, 1993 |
| * The Regents of the University of California. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. All advertising materials mentioning features or use of this software |
| * must display the following acknowledgement: |
| * This product includes software developed by the University of |
| * California, Berkeley and its contributors. |
| * 4. Neither the name of the University nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| |
| /* |
| * This is a hacked version of NetBSD's readdir() function written to work |
| * around an apparent bug in the Digital UNIX 3.0 getdirentries() system call |
| * and/or their "/dev/fd" filesystem. The problem is that when applied to |
| * "/dev/fs", getdirentries() returns the wrong size, which can cause readdir() |
| * to run off the end of it's internal buffer and return bogus file names. |
| * |
| * The changes from the original NetBSD file are: |
| * |
| * - uses of the field dd_flags in the DIR structure have been removed since |
| * Digital UNIX doesn't have this field (it seems to be mostly used for |
| * dealing with whiteout's in NetBSD's union filesystem). |
| * |
| * - uses of the dd_len field were replaced with dd_bufsiz, since this appears |
| * to be where the Digital UNIX opendir() call stashes the size of the buffer |
| * it mallocs. Why does Digital UNIX have both? No idea -- as far as I |
| * could tell dd_len was always 0. |
| * |
| * - code within "#ifdef BROKEN_GETDIRENTRIES ... #endif" has been added to |
| * workaround the bug. Note: this code uses the (apparently) unused field, |
| * dd_len, in the Digital UNIX DIR structure. This is pretty nasty, but |
| * then, this whole routine *is* just a hack to get around a (hopefully) |
| * temporary problem in Digital UNIX. |
| * |
| * This routine has only been tested on a couple of Digital UNIX 3.0 systems. |
| * I make no guarantees that it will work for you...! |
| * |
| * Duncan McEwan (duncan@comp.vuw.ac.nz) |
| */ |
| |
| /* |
| * Additional changes by Vic Abell <abe@cc.purdue.edu>: |
| * |
| * - The BROKEN_GETDIRENTRIES symbol was deleted. Use of this function |
| * is controlled in the lsof distribution by the HASLOCALREADDIR |
| * definition. |
| */ |
| |
| |
| /* |
| * CloseDir() - close directory |
| */ |
| |
| int |
| CloseDir(dirp) |
| register DIR *dirp; |
| { |
| return(closedir(dirp)); |
| } |
| |
| |
| /* |
| * OpenDir() - open directory |
| */ |
| |
| DIR * |
| OpenDir(dir) |
| char *dir; |
| { |
| DIR *dirp; |
| |
| if ((dirp = opendir(dir))) { |
| |
| /* |
| * Get a stat(2) buffer for the directory. |
| * |
| * Warn if the stat(2) buffer operation fails, close the directory, |
| * and respond that the open failed. |
| */ |
| if (statsafely(dir, &Dirsb)) { |
| int en = errno; |
| |
| if (!Fwarn) { |
| (void) fprintf(stderr, |
| "%s: WARNING: can't statsafely(", Pn); |
| safestrprt(dir, stderr, 0); |
| (void) fprintf(stderr, "): %s\n", strerror(en)); |
| } |
| (void) CloseDir(dirp); |
| dirp = (DIR *)NULL; |
| errno = en; |
| } |
| } |
| return(dirp); |
| } |
| |
| |
| /* |
| * ReadDir() - read next directory entry |
| */ |
| |
| extern struct DIRTYPE * |
| ReadDir(dirp) |
| register DIR *dirp; |
| { |
| register struct DIRTYPE *dp; |
| |
| /* |
| * Loop through the directory. |
| */ |
| for (;;) { |
| if (dirp->dd_loc >= dirp->dd_size) { |
| dirp->dd_loc = 0; |
| } |
| if (dirp->dd_loc == 0) { |
| dirp->dd_size = getdirentries(dirp->dd_fd, |
| dirp->dd_buf, dirp->dd_bufsiz, &dirp->dd_seek); |
| |
| if (dirp->dd_size <= 0) |
| return((struct DIRTYPE *)NULL); |
| /* |
| * If the size returned by getdirentries() exceeds what it |
| * should be (as determined by a stat(2) of the directory), |
| * set it to the proper value. This is an adjustment for an |
| * apparent bug in the Digital UNIX 3.[02] getdirentries() |
| * function, when applied to a /dev/fd mount point. |
| * |
| * This check was conceived by Duncan McEwan and modified by |
| * Vic Abell. |
| */ |
| if (dirp->dd_size > (long)Dirsb.st_size) |
| dirp->dd_size = (long)Dirsb.st_size; |
| Dirsb.st_size -= (off_t)dirp->dd_size; |
| } |
| dp = (struct DIRTYPE *)(dirp->dd_buf + dirp->dd_loc); |
| if ((long)dp & 03) /* bogus pointer check */ |
| return((struct DIRTYPE *)NULL); |
| if (dp->d_reclen <= 0 |
| || dp->d_reclen > dirp->dd_bufsiz + 1 - dirp->dd_loc) |
| return((struct DIRTYPE *)NULL); |
| dirp->dd_loc += dp->d_reclen; |
| if (dp->d_ino == 0) |
| continue; |
| return (dp); |
| } |
| } |
| #endif /* defined(USELOCALREADDIR) */ |
| |
| |
| #if defined(HASDCACHE) |
| /* |
| * rereaddev() - reread device names, modes and types |
| */ |
| |
| void |
| rereaddev() |
| { |
| (void) clr_devtab(); |
| |
| # if defined(DCACHE_CLR) |
| (void) DCACHE_CLR(); |
| # endif /* defined(DCACHE_CLR) */ |
| |
| readdev(1); |
| DCunsafe = 0; |
| } |
| #endif /* defined(HASDCACHE) */ |
| |
| |
| /* |
| * rmdupdev() - remove duplicate (major/minor/inode) devices |
| */ |
| |
| static int |
| rmdupdev(dp, n, nm) |
| struct l_dev ***dp; /* device table pointers address */ |
| int n; /* number of pointers */ |
| char *nm; /* device table name for error message */ |
| { |
| struct clone *c, *cp; |
| int i, j, k; |
| struct l_dev **p; |
| |
| for (i = j = 0, p = *dp; i < n ;) { |
| for (k = i + 1; k < n; k++) { |
| if (p[i]->rdev != p[k]->rdev || p[i]->inode != p[k]->inode) |
| break; |
| /* |
| * See if we're deleting a duplicate clone device. If so, |
| * delete its clone table entry. |
| */ |
| for (c = Clone, cp = (struct clone *)NULL; |
| c; |
| cp = c, c = c->next) |
| { |
| if (&Devtp[c->dx] != p[k]) |
| continue; |
| if (!cp) |
| Clone = c->next; |
| else |
| cp->next = c->next; |
| (void) free((FREE_P *)c); |
| break; |
| } |
| } |
| if (i != j) |
| p[j] = p[i]; |
| j++; |
| i = k; |
| } |
| if (n == j) |
| return(n); |
| if (!(*dp = (struct l_dev **)realloc((MALLOC_P *)*dp, |
| (MALLOC_S)(j * sizeof(struct l_dev *))))) |
| { |
| (void) fprintf(stderr, "%s: can't realloc %s device pointers\n", |
| Pn, nm); |
| Exit(1); |
| } |
| return(j); |
| } |
| |
| |
| #if defined(HASDCACHE) |
| /* |
| * vfy_dev() - verify a device table entry (usually when DCunsafe == 1) |
| * |
| * Note: rereads entire device table when an entry can't be verified. |
| */ |
| |
| int |
| vfy_dev(dp) |
| struct l_dev *dp; /* device table pointer */ |
| { |
| struct stat sb; |
| |
| if (!DCunsafe || dp->v) |
| return(1); |
| |
| #if defined(USE_STAT) |
| if (stat(dp->name, &sb) != 0 |
| #else /* !defined(USE_STAT) */ |
| if (lstat(dp->name, &sb) != 0 |
| #endif /* defined(USE_STAT) */ |
| |
| || dp->rdev != sb.st_rdev |
| || dp->inode != (INODETYPE)sb.st_ino) { |
| (void) rereaddev(); |
| return(0); |
| } |
| dp->v = 1; |
| return(1); |
| } |
| #endif /* defined(HASDCACHE) */ |