pr_rename.c

Sun Solaris 10 中的 DTrace 组件的源代码。请参看: http://www.sun.com/software/solaris/observability.jsp

/*
 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only.
 * See the file usr/src/LICENSING.NOTICE in this distribution or
 * http://www.opensolaris.org/license/ for details.
 */

#pragma ident	"@(#)pr_rename.c	1.2	00/03/05 SMI"

#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include "libproc.h"

/*
 * rename() system call -- executed by subject process.
 */
int
pr_rename(struct ps_prochandle *Pr, const char *old, const char *new)
{
	sysret_t rval;
	argdes_t argd[2];
	argdes_t *adp;
	int error;

	if (Pr == NULL)
		return (rename(old, new));

	adp = &argd[0];		/* old argument */
	adp->arg_value = 0;
	adp->arg_object = (void *)old;
	adp->arg_type = AT_BYREF;
	adp->arg_inout = AI_INPUT;
	adp->arg_size = strlen(old) + 1;

	adp++;			/* new argument */
	adp->arg_value = 0;
	adp->arg_object = (void *)new;
	adp->arg_type = AT_BYREF;
	adp->arg_inout = AI_INPUT;
	adp->arg_size = strlen(new) + 1;

	error = Psyscall(Pr, &rval, SYS_rename, 2, &argd[0]);

	if (error) {
		errno = (error > 0) ? error : ENOSYS;
		return (-1);
	}
	return (rval.sys_rval1);
}

/*
 * link() system call -- executed by subject process.
 */
int
pr_link(struct ps_prochandle *Pr, const char *existing, const char *new)
{
	sysret_t rval;
	argdes_t argd[2];
	argdes_t *adp;
	int error;

	if (Pr == NULL)
		return (link(existing, new));

	adp = &argd[0];		/* existing argument */
	adp->arg_value = 0;
	adp->arg_object = (void *)existing;
	adp->arg_type = AT_BYREF;
	adp->arg_inout = AI_INPUT;
	adp->arg_size = strlen(existing) + 1;

	adp++;			/* new argument */
	adp->arg_value = 0;
	adp->arg_object = (void *)new;
	adp->arg_type = AT_BYREF;
	adp->arg_inout = AI_INPUT;
	adp->arg_size = strlen(new) + 1;

	error = Psyscall(Pr, &rval, SYS_link, 2, &argd[0]);

	if (error) {
		errno = (error > 0) ? error : ENOSYS;
		return (-1);
	}
	return (rval.sys_rval1);
}

/*
 * unlink() system call -- executed by subject process.
 */
int
pr_unlink(struct ps_prochandle *Pr, const char *path)
{
	sysret_t rval;
	argdes_t argd[1];
	argdes_t *adp;
	int error;

	if (Pr == NULL)
		return (unlink(path));

	adp = &argd[0];		/* path argument */
	adp->arg_value = 0;
	adp->arg_object = (void *)path;
	adp->arg_type = AT_BYREF;
	adp->arg_inout = AI_INPUT;
	adp->arg_size = strlen(path) + 1;

	error = Psyscall(Pr, &rval, SYS_unlink, 1, &argd[0]);

	if (error) {
		errno = (error > 0) ? error : ENOSYS;
		return (-1);
	}
	return (rval.sys_rval1);
}