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55648840de
exhausted. - Add a new protect(1) command that can be used to set or revoke protection from arbitrary processes. Similar to ktrace it can apply a change to all existing descendants of a process as well as future descendants. - Add a new procctl(2) system call that provides a generic interface for control operations on processes (as opposed to the debugger-specific operations provided by ptrace(2)). procctl(2) uses a combination of idtype_t and an id to identify the set of processes on which to operate similar to wait6(). - Add a PROC_SPROTECT control operation to manage the protection status of a set of processes. MADV_PROTECT still works for backwards compatability. - Add a p_flag2 to struct proc (and a corresponding ki_flag2 to kinfo_proc) the first bit of which is used to track if P_PROTECT should be inherited by new child processes. Reviewed by: kib, jilles (earlier version) Approved by: re (delphij) MFC after: 1 month
123 lines
3.0 KiB
C
123 lines
3.0 KiB
C
/*-
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* Copyright (c) 2013 Advanced Computing Technologies LLC
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* Written by: John H. Baldwin <jhb@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/procctl.h>
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#include <sys/types.h>
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#include <sys/mman.h>
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#include <err.h>
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#include <errno.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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static void
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usage(void)
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{
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fprintf(stderr, "usage: protect [-i] command\n");
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fprintf(stderr, " protect [-cdi] -g pgrp | -p pid\n");
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exit(1);
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}
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static id_t
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parse_id(char *id)
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{
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static bool first = true;
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long value;
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char *ch;
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if (!first) {
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warnx("only one -g or -p flag is permitted");
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usage();
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}
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value = strtol(id, &ch, 0);
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if (*ch != '\0') {
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warnx("invalid process id");
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usage();
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}
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return (value);
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}
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int
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main(int argc, char *argv[])
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{
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idtype_t idtype;
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id_t id;
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int ch, flags;
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bool descend, inherit, idset;
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idtype = P_PID;
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id = getpid();
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flags = PPROT_SET;
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descend = inherit = idset = false;
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while ((ch = getopt(argc, argv, "cdig:p:")) != -1)
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switch (ch) {
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case 'c':
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flags = PPROT_CLEAR;
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break;
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case 'd':
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descend = true;
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break;
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case 'i':
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inherit = true;
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break;
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case 'g':
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idtype = P_PGID;
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id = parse_id(optarg);
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idset = true;
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break;
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case 'p':
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idtype = P_PID;
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id = parse_id(optarg);
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idset = true;
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break;
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}
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argc -= optind;
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argv += optind;
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if ((idset && argc != 0) || (!idset && (argc == 0 || descend)))
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usage();
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if (descend)
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flags |= PPROT_DESCEND;
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if (inherit)
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flags |= PPROT_INHERIT;
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if (procctl(idtype, id, PROC_SPROTECT, &flags) == -1)
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err(1, "procctl");
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if (argc != 0) {
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errno = 0;
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execvp(*argv, argv);
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err(errno == ENOENT ? 127 : 126, "%s", *argv);
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}
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return (0);
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}
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