githubmirror/lsof

lib/cvfs.c
98 строк3 KB
Chen
Expose functionality as a re-usable library - Part 2 (#284)
12 апр 2023, 09:01
12 апр 2023, 09:016dca348
/*
 * cvfs.c -- completevfs() function 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.
 */

/*
 * The caller must define CVFS_DEVSAVE to have the device number moved
 * from the mounts entry to the local vfs structure.
 *
 * The caller must define CVFS_NLKSAVE to have the link count moved from
 * the mounts entry to the local vfs structure.
 *
 * The caller must define CVFS_SZSAVE to have the size moved from the
 * mounts entry to the local vfs structure.
 */

#include "common.h"
#include "machine.h"

#if defined(USE_LIB_COMPLETEVFS)

/*
 * completevfs() - complete local vfs structure
 */

void completevfs(struct lsof_context *ctx, /* context */
                 struct l_vfs *vfs,        /* local vfs structure pointer */
                 dev_t *dev)               /* device */
{
    struct mounts *mp;
    /*
     * If only Internet socket files are selected, don't bother completing the
     * local vfs structure.
     */
    if (Selinet)
        return;
    /*
     * Search for a match on device number.
     */
    for (mp = readmnt(ctx); mp; mp = mp->next) {
        if (mp->dev == *dev) {

#    if defined(CVFS_DEVSAVE)
            vfs->dev = mp->dev;
#    endif /* defined(CVFS_DEVSAVE) */

#    if defined(CVFS_NLKSAVE)
            vfs->nlink = mp->nlink;
#    endif /* defined(CVFS_NLKSAVE) */

#    if defined(CVFS_SZSAVE)
            vfs->size = mp->size;
#    endif /* defined(CVFS_SZSAVE) */

            vfs->dir = mp->dir;
            vfs->fsname = mp->fsname;

#    if defined(HASFSINO)
            vfs->fs_ino = mp->inode;
#    endif /* defined(HASFSINO) */

#    if defined(HASMNTSTAT)
            vfs->mnt_stat = mp->stat;
#    endif /* defined(HASMNTSTAT) */

            return;
        }
    }
}
#else  /* !defined(USE_LIB_COMPLETEVFS) */
char cvfs_d1[] = "d";
char *cvfs_d2 = cvfs_d1;
#endif /* defined(USE_LIB_COMPLETEVFS) */