/*-
* Copyright (c) 2016 The FreeBSD Foundation
* All rights reserved.
*
* This software was developed by Konstantin Belousov <kib@FreeBSD.org>
* under sponsorship from the FreeBSD Foundation.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/procctl.h>
#include <err.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
enum {
MODE_INVALID,
MODE_TRACE,
MODE_TRAPCAP,
};
static pid_t
str2pid(const char *str)
{
pid_t res;
char *tail;
res = strtol(str, &tail, 0);
if (*tail != '\0') {
warnx("non-numeric pid");
return (-1);
}
return (res);
}
static void __dead2
usage(void)
{
fprintf(stderr, "Usage: proccontrol -m (trace|trapcap) [-q] "
"[-s (enable|disable)] [-p pid | command]\n");
exit(1);
}
int
main(int argc, char *argv[])
{
int arg, ch, error, mode;
pid_t pid;
bool enable, do_command, query;
mode = MODE_INVALID;
enable = true;
pid = -1;
query = false;
while ((ch = getopt(argc, argv, "m:qs:p:")) != -1) {
switch (ch) {
case 'm':
if (strcmp(optarg, "trace") == 0)
mode = MODE_TRACE;
else if (strcmp(optarg, "trapcap") == 0)
mode = MODE_TRAPCAP;
else
usage();
break;
case 's':
if (strcmp(optarg, "enable") == 0)
enable = true;
else if (strcmp(optarg, "disable") == 0)
enable = false;
else
usage();
break;
case 'p':
pid = str2pid(optarg);
break;
case 'q':
query = true;
break;
case '?':
default:
usage();
break;
}
}
argc -= optind;
argv += optind;
do_command = argc != 0;
if (do_command) {
if (pid != -1 || query)
usage();
pid = getpid();
} else if (pid == -1) {
pid = getpid();
}
if (query) {
switch (mode) {
case MODE_TRACE:
error = procctl(P_PID, pid, PROC_TRACE_STATUS, &arg);
break;
case MODE_TRAPCAP:
error = procctl(P_PID, pid, PROC_TRAPCAP_STATUS, &arg);
break;
default:
usage();
break;
}
if (error != 0)
err(1, "procctl status");
switch (mode) {
case MODE_TRACE:
if (arg == -1)
printf("disabled\n");
else if (arg == 0)
printf("enabled, no debugger\n");
else
printf("enabled, traced by %d\n", arg);
break;
case MODE_TRAPCAP:
switch (arg) {
case PROC_TRAPCAP_CTL_ENABLE:
printf("enabled\n");
break;
case PROC_TRAPCAP_CTL_DISABLE:
printf("disabled\n");
break;
}
break;
}
} else {
switch (mode) {
case MODE_TRACE:
arg = enable ? PROC_TRACE_CTL_ENABLE :
PROC_TRACE_CTL_DISABLE;
error = procctl(P_PID, pid, PROC_TRACE_CTL, &arg);
break;
case MODE_TRAPCAP:
arg = enable ? PROC_TRAPCAP_CTL_ENABLE :
PROC_TRAPCAP_CTL_DISABLE;
error = procctl(P_PID, pid, PROC_TRAPCAP_CTL, &arg);
break;
default:
usage();
break;
}
if (error != 0)
err(1, "procctl ctl");
if (do_command) {
error = execvp(argv[0], argv);
err(1, "exec");
}
}
exit(0);
}
