1de7b4b805
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. No functional change intended.
163 lines
4.3 KiB
C
163 lines
4.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2007 Robert N. M. Watson
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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/types.h>
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#include <sys/sysctl.h>
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#include <err.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sysexits.h>
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#include "ddb.h"
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/*
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* These commands manage DDB(4) scripts from user space. For better or worse,
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* the setting and unsetting of scripts is only poorly represented using
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* sysctl(8), and this interface provides a more user-friendly way to
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* accomplish this management, wrapped around lower-level sysctls. For
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* completeness, listing of scripts is also included.
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*/
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#define SYSCTL_SCRIPT "debug.ddb.scripting.script"
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#define SYSCTL_SCRIPTS "debug.ddb.scripting.scripts"
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#define SYSCTL_UNSCRIPT "debug.ddb.scripting.unscript"
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/*
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* Print all scripts (scriptname==NULL) or a specific script.
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*/
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static void
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ddb_list_scripts(const char *scriptname)
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{
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char *buffer, *line, *nextline;
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char *line_script, *line_scriptname;
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size_t buflen, len;
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int ret;
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repeat:
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if (sysctlbyname(SYSCTL_SCRIPTS, NULL, &buflen, NULL, 0) < 0)
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err(EX_OSERR, "sysctl: %s", SYSCTL_SCRIPTS);
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if (buflen == 0)
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return;
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buffer = malloc(buflen);
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if (buffer == NULL)
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err(EX_OSERR, "malloc");
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bzero(buffer, buflen);
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len = buflen;
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ret = sysctlbyname(SYSCTL_SCRIPTS, buffer, &len, NULL, 0);
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if (ret < 0 && errno != ENOMEM)
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err(EX_OSERR, "sysctl: %s", SYSCTL_SCRIPTS);
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if (ret < 0) {
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free(buffer);
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goto repeat;
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}
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/*
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* We nul'd the buffer before calling sysctl(), so at worst empty.
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*
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* If a specific script hasn't been requested, print it all.
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*/
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if (scriptname == NULL) {
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printf("%s", buffer);
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free(buffer);
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return;
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}
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/*
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* If a specific script has been requested, we have to parse the
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* string to find it.
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*/
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nextline = buffer;
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while ((line = strsep(&nextline, "\n")) != NULL) {
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line_script = line;
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line_scriptname = strsep(&line_script, "=");
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if (line_script == NULL)
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continue;
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if (strcmp(scriptname, line_scriptname) != 0)
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continue;
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printf("%s\n", line_script);
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break;
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}
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if (line == NULL) {
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errno = ENOENT;
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err(EX_DATAERR, "%s", scriptname);
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}
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free(buffer);
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}
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/*
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* "ddb script" can be used to either print or set a script.
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*/
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void
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ddb_script(int argc, char *argv[])
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{
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if (argc != 2)
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usage();
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argv++;
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argc--;
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if (strchr(argv[0], '=') != 0) {
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if (sysctlbyname(SYSCTL_SCRIPT, NULL, NULL, argv[0],
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strlen(argv[0]) + 1) < 0)
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err(EX_OSERR, "sysctl: %s", SYSCTL_SCRIPTS);
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} else
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ddb_list_scripts(argv[0]);
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}
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void
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ddb_scripts(int argc, char *argv[])
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{
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if (argc != 1)
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usage();
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ddb_list_scripts(NULL);
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}
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void
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ddb_unscript(int argc, char *argv[])
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{
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int ret;
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if (argc != 2)
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usage();
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argv++;
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argc--;
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ret = sysctlbyname(SYSCTL_UNSCRIPT, NULL, NULL, argv[0],
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strlen(argv[0]) + 1);
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if (ret < 0 && errno == EINVAL) {
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errno = ENOENT;
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err(EX_DATAERR, "sysctl: %s", argv[0]);
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} else if (ret < 0)
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err(EX_OSERR, "sysctl: %s", SYSCTL_UNSCRIPT);
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}
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