githubmirror/lsof

lib/node.c
225 строк6 KB
Chen
Library part5 (#290)
24 май 2023, 13:55
24 май 2023, 13:55cab786c
/*
 * node.c - common node reading 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.
 */

#include "common.h"

/*
 * print_kptr() - print kernel pointer
 */

char *print_kptr(KA_T kp,     /* kernel pointer address */
                 char *buf,   /* optional destination buffer */
                 size_t bufl) /* size of buf[] */
{
    static char dbuf[32];

    (void)snpf(buf ? buf : dbuf, buf ? bufl : sizeof(dbuf), KA_T_FMT_X, kp);
    return (buf ? buf : dbuf);
}

#if defined(HASCDRNODE)
/*
 * readcdrnode() - read CD-ROM node
 */

int readcdrnode(struct lsof_context *ctx, /* context */
                KA_T ca,                  /* cdrnode kernel address */
                struct cdrnode *c)        /* cdrnode buffer */
{
    if (kread(ctx, (KA_T)ca, (char *)c, sizeof(struct cdrnode))) {
        (void)snpf(Namech, Namechl, "can't read cdrnode at %s",
                   print_kptr(ca, (char *)NULL, 0));
        return (1);
    }
    return (0);
}
#endif /* defined(HASCDRNODE) */

#if defined(HASFIFONODE)
/*
 * readfifonode() - read fifonode
 */

int readfifonode(struct lsof_context *ctx, /* context */
                 KA_T fa,                  /* fifonode kernel address */
                 struct fifonode *f)       /* fifonode buffer */
{
    if (kread(ctx, (KA_T)fa, (char *)f, sizeof(struct fifonode))) {
        (void)snpf(Namech, Namechl, "can't read fifonode at %s",
                   print_kptr(fa, (char *)NULL, 0));
        return (1);
    }
    return (0);
}
#endif /* defined(HASFIFONODE) */

#if defined(HASGNODE)
/*
 * readgnode() - read gnode
 */

int readgnode(struct lsof_context *ctx, /* context */
              KA_T ga,                  /* gnode kernel address */
              struct gnode *g)          /* gnode buffer */
{
    if (kread(ctx, (KA_T)ga, (char *)g, sizeof(struct gnode))) {
        (void)snpf(Namech, Namechl, "can't read gnode at %s",
                   print_kptr(ga, (char *)NULL, 0));
        return (1);
    }
    return (0);
}
#endif /* defined(HASGNODE) */

#if defined(HASHSNODE)
/*
 * readhsnode() - read High Sierra file system node
 */

int readhsnode(struct lsof_context *ctx, /* context */
               KA_T ha,                  /* hsnode kernel address */
               struct hsnode *h)         /* hsnode buffer */
{
    if (kread(ctx, (KA_T)ha, (char *)h, sizeof(struct hsnode))) {
        (void)snpf(Namech, Namechl, "can't read hsnode at %s",
                   print_kptr(ha, (char *)NULL, 0));
        return (1);
    }
    return (0);
}
#endif /* defined(HASHSNODE) */

#if defined(HASINODE)
/*
 * readinode() - read inode
 */

int readinode(struct lsof_context *ctx, /* context */
              KA_T ia,                  /* inode kernel address */
              struct inode *i)          /* inode buffer */
{
    if (kread(ctx, (KA_T)ia, (char *)i, sizeof(struct inode))) {
        (void)snpf(Namech, Namechl, "can't read inode at %s",
                   print_kptr(ia, (char *)NULL, 0));
        return (1);
    }
    return (0);
}
#endif /* defined(HASINODE) */

#if defined(HASPIPENODE)
/*
 * readpipenode() - read pipe node
 */

int readpipenode(struct lsof_context *ctx, /* context */
                 KA_T pa,                  /* pipe node kernel address */
                 struct pipenode *p)       /* pipe node buffer */
{
    if (kread(ctx, (KA_T)pa, (char *)p, sizeof(struct pipenode))) {
        (void)snpf(Namech, Namechl, "can't read pipenode at %s",
                   print_kptr(pa, (char *)NULL, 0));
        return (1);
    }
    return (0);
}
#endif /* defined(HASPIPENODE) */

#if defined(HASRNODE)
/*
 * readrnode() - read rnode
 */

int readrnode(struct lsof_context *ctx, /* context */
              KA_T ra,                  /* rnode kernel space address */
              struct rnode *r)          /* rnode buffer pointer */
{
    if (kread(ctx, (KA_T)ra, (char *)r, sizeof(struct rnode))) {
        (void)snpf(Namech, Namechl, "can't read rnode at %s",
                   print_kptr(ra, (char *)NULL, 0));
        return (1);
    }
    return (0);
}
#endif /* defined(HASRNODE) */

#if defined(HASSNODE)
/*
 * readsnode() - read snode
 */

int readsnode(struct lsof_context *ctx, /* context */
              KA_T sa,                  /* snode kernel space address */
              struct snode *s)          /* snode buffer pointer */
{
    if (kread(ctx, (KA_T)sa, (char *)s, sizeof(struct snode))) {
        (void)snpf(Namech, Namechl, "can't read snode at %s",
                   print_kptr(sa, (char *)NULL, 0));
        return (1);
    }
    return (0);
}
#endif /* defined(HASSNODE) */

#if defined(HASTMPNODE)
/*
 * readtnode() - read tmpnode
 */

int readtnode(struct lsof_context *ctx, /* context */
              KA_T ta,                  /* tmpnode kernel space address */
              struct tmpnode *t)        /* tmpnode buffer pointer */
{
    if (kread(ctx, (KA_T)ta, (char *)t, sizeof(struct tmpnode))) {
        (void)snpf(Namech, Namechl, "can't read tmpnode at %s",
                   print_kptr(ta, (char *)NULL, 0));
        return (1);
    }
    return (0);
}
#endif /* defined(HASTMPNODE) */

#if defined(HASVNODE)
/*
 * readvnode() - read vnode
 */

int readvnode(struct lsof_context *ctx, /* context */
              KA_T va,                  /* vnode kernel space address */
              struct vnode *v)          /* vnode buffer pointer */
{
    if (kread(ctx, (KA_T)va, (char *)v, sizeof(struct vnode))) {
        (void)snpf(Namech, Namechl, "can't read vnode at %s",
                   print_kptr(va, (char *)NULL, 0));
        return (1);
    }
    return (0);
}
#endif /* defined(HASVNODE) */