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27fa42b24c
The macro would eat the first parameter. In some cases the format string for vshPrint was eaten. In other cases the calls referenced variables which did not exist in the given context. Avoid errors by doing compile time checking.
568 lines
21 KiB
C
568 lines
21 KiB
C
/*
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* vsh.h: common data to be used by clients to exercise the libvirt API
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*
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* Copyright (C) 2005, 2007-2015 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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* Daniel Veillard <veillard@redhat.com>
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* Karel Zak <kzak@redhat.com>
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* Daniel P. Berrange <berrange@redhat.com>
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*/
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#ifndef VSH_H
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# define VSH_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 <stdarg.h>
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# include <unistd.h>
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# include <sys/stat.h>
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# include <termios.h>
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# include "internal.h"
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# include "virerror.h"
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# include "virthread.h"
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# define VIR_FROM_THIS VIR_FROM_NONE
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# define GETTIMEOFDAY(T) gettimeofday(T, NULL)
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# define VSH_MAX_XML_FILE (10*1024*1024)
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# define VSH_MATCH(FLAG) (flags & (FLAG))
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/**
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* The log configuration
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*/
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# define MSG_BUFFER 4096
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# define DIR_MODE (S_IWUSR | S_IRUSR | S_IXUSR | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) /* 0755 */
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# define FILE_MODE (S_IWUSR | S_IRUSR | S_IRGRP | S_IROTH) /* 0644 */
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# define LOCK_MODE (S_IWUSR | S_IRUSR) /* 0600 */
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# define LVL_DEBUG "DEBUG"
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# define LVL_INFO "INFO"
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# define LVL_NOTICE "NOTICE"
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# define LVL_WARNING "WARNING"
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# define LVL_ERROR "ERROR"
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/**
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* vshErrorLevel:
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*
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* Indicates the level of a log message
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*/
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typedef enum {
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VSH_ERR_DEBUG = 0,
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VSH_ERR_INFO,
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VSH_ERR_NOTICE,
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VSH_ERR_WARNING,
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VSH_ERR_ERROR
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} vshErrorLevel;
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# define VSH_DEBUG_DEFAULT VSH_ERR_ERROR
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/*
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* virsh command line grammar:
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*
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* command_line = <command>\n | <command>; <command>; ...
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*
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* command = <keyword> <option> [--] <data>
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*
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* option = <bool_option> | <int_option> | <string_option>
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* data = <string>
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*
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* bool_option = --optionname
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* int_option = --optionname <number> | --optionname=<number>
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* string_option = --optionname <string> | --optionname=<string>
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*
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* keyword = [a-zA-Z][a-zA-Z-]*
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* number = [0-9]+
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* string = ('[^']*'|"([^\\"]|\\.)*"|([^ \t\n\\'"]|\\.))+
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*
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*/
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/*
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* vshCmdOptType - command option type
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*/
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typedef enum {
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VSH_OT_BOOL, /* optional boolean option */
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VSH_OT_STRING, /* optional string option */
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VSH_OT_INT, /* optional or mandatory int option */
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VSH_OT_DATA, /* string data (as non-option) */
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VSH_OT_ARGV, /* remaining arguments */
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VSH_OT_ALIAS, /* alternate spelling for a later argument */
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} vshCmdOptType;
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/*
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* Command Option Flags
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*/
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enum {
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VSH_OFLAG_NONE = 0, /* without flags */
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VSH_OFLAG_REQ = (1 << 0), /* option required */
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VSH_OFLAG_EMPTY_OK = (1 << 1), /* empty string option allowed */
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VSH_OFLAG_REQ_OPT = (1 << 2), /* --optionname required */
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};
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/* forward declarations */
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typedef struct _vshClientHooks vshClientHooks;
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typedef struct _vshCmd vshCmd;
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typedef struct _vshCmdDef vshCmdDef;
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typedef struct _vshCmdGrp vshCmdGrp;
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typedef struct _vshCmdInfo vshCmdInfo;
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typedef struct _vshCmdOpt vshCmdOpt;
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typedef struct _vshCmdOptDef vshCmdOptDef;
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typedef struct _vshControl vshControl;
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typedef char **(*vshCompleter)(unsigned int flags);
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/*
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* vshCmdInfo -- name/value pair for information about command
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*
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* Commands should have at least the following names:
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* "help" - short description of command
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* "desc" - description of command, or empty string
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*/
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struct _vshCmdInfo {
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const char *name; /* name of information, or NULL for list end */
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const char *data; /* non-NULL information */
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};
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/*
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* vshCmdOptDef - command option definition
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*/
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struct _vshCmdOptDef {
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const char *name; /* the name of option, or NULL for list end */
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vshCmdOptType type; /* option type */
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unsigned int flags; /* flags */
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const char *help; /* non-NULL help string; or for VSH_OT_ALIAS
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* the name of a later public option */
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vshCompleter completer; /* option completer */
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unsigned int completer_flags; /* option completer flags */
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};
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/*
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* vshCmdOpt - command options
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*
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* After parsing a command, all arguments to the command have been
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* collected into a list of these objects.
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*/
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struct _vshCmdOpt {
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const vshCmdOptDef *def; /* non-NULL pointer to option definition */
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char *data; /* allocated data, or NULL for bool option */
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vshCmdOpt *next;
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};
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/*
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* Command Usage Flags
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*/
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enum {
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VSH_CMD_FLAG_NOCONNECT = (1 << 0), /* no prior connection needed */
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VSH_CMD_FLAG_ALIAS = (1 << 1), /* command is an alias */
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};
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/*
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* vshCmdDef - command definition
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*/
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struct _vshCmdDef {
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const char *name; /* name of command, or NULL for list end */
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bool (*handler) (vshControl *, const vshCmd *); /* command handler */
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const vshCmdOptDef *opts; /* definition of command options */
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const vshCmdInfo *info; /* details about command */
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unsigned int flags; /* bitwise OR of VSH_CMD_FLAG */
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};
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/*
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* vshCmd - parsed command
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*/
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struct _vshCmd {
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const vshCmdDef *def; /* command definition */
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vshCmdOpt *opts; /* list of command arguments */
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vshCmd *next; /* next command */
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};
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/*
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* vshControl
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*/
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struct _vshControl {
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const char *name; /* hardcoded name of the binary that cannot
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* be changed without recompilation compared
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* to program name */
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char *connname; /* connection name */
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char *progname; /* program name */
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vshCmd *cmd; /* the current command */
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char *cmdstr; /* string with command */
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bool imode; /* interactive mode? */
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bool quiet; /* quiet mode */
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bool timing; /* print timing info? */
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int debug; /* print debug messages? */
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char *logfile; /* log file name */
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int log_fd; /* log file descriptor */
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char *historydir; /* readline history directory name */
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char *historyfile; /* readline history file name */
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virThread eventLoop;
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virMutex lock;
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bool eventLoopStarted;
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bool quit;
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int eventPipe[2]; /* Write-to-self pipe to end waiting for an
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* event to occur */
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int eventTimerId; /* id of event loop timeout registration */
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int keepalive_interval; /* Client keepalive interval */
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int keepalive_count; /* Client keepalive count */
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# ifndef WIN32
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struct termios termattr; /* settings of the tty terminal */
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# endif
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bool istty; /* is the terminal a tty */
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const vshClientHooks *hooks;/* mandatory client specific hooks */
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void *privData; /* client specific data */
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};
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typedef void *
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(*vshConnectionHook)(vshControl *ctl);
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struct _vshClientHooks {
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vshConnectionHook connHandler;
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};
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struct _vshCmdGrp {
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const char *name; /* name of group, or NULL for list end */
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const char *keyword; /* help keyword */
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const vshCmdDef *commands;
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};
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void vshError(vshControl *ctl, const char *format, ...)
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ATTRIBUTE_FMT_PRINTF(2, 3);
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void vshOpenLogFile(vshControl *ctl);
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void vshOutputLogFile(vshControl *ctl, int log_level, const char *format,
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va_list ap)
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ATTRIBUTE_FMT_PRINTF(3, 0);
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void vshCloseLogFile(vshControl *ctl);
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const char *vshCmddefGetInfo(const vshCmdDef *cmd, const char *info);
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const vshCmdDef *vshCmddefSearch(const char *cmdname);
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bool vshCmddefHelp(vshControl *ctl, const char *name);
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const vshCmdGrp *vshCmdGrpSearch(const char *grpname);
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bool vshCmdGrpHelp(vshControl *ctl, const char *name);
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int vshCommandOptInt(vshControl *ctl, const vshCmd *cmd,
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const char *name, int *value)
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ATTRIBUTE_NONNULL(4) ATTRIBUTE_RETURN_CHECK;
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int vshCommandOptUInt(vshControl *ctl, const vshCmd *cmd,
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const char *name, unsigned int *value)
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ATTRIBUTE_NONNULL(4) ATTRIBUTE_RETURN_CHECK;
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int vshCommandOptUIntWrap(vshControl *ctl, const vshCmd *cmd,
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const char *name, unsigned int *value)
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ATTRIBUTE_NONNULL(4) ATTRIBUTE_RETURN_CHECK;
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int vshCommandOptUL(vshControl *ctl, const vshCmd *cmd,
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const char *name, unsigned long *value)
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ATTRIBUTE_NONNULL(4) ATTRIBUTE_RETURN_CHECK;
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int vshCommandOptULWrap(vshControl *ctl, const vshCmd *cmd,
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const char *name, unsigned long *value)
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ATTRIBUTE_NONNULL(4) ATTRIBUTE_RETURN_CHECK;
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int vshCommandOptStringQuiet(vshControl *ctl, const vshCmd *cmd,
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const char *name, const char **value)
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ATTRIBUTE_NONNULL(4) ATTRIBUTE_RETURN_CHECK;
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int vshCommandOptStringReq(vshControl *ctl, const vshCmd *cmd,
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const char *name, const char **value)
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ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(3)
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ATTRIBUTE_NONNULL(4) ATTRIBUTE_RETURN_CHECK;
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int vshCommandOptLongLong(vshControl *ctl, const vshCmd *cmd,
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const char *name, long long *value)
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ATTRIBUTE_NONNULL(4) ATTRIBUTE_RETURN_CHECK;
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int vshCommandOptULongLong(vshControl *ctl, const vshCmd *cmd,
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const char *name, unsigned long long *value)
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ATTRIBUTE_NONNULL(4) ATTRIBUTE_RETURN_CHECK;
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int vshCommandOptULongLongWrap(vshControl *ctl, const vshCmd *cmd,
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const char *name, unsigned long long *value)
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ATTRIBUTE_NONNULL(4) ATTRIBUTE_RETURN_CHECK;
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int vshCommandOptScaledInt(vshControl *ctl, const vshCmd *cmd,
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const char *name, unsigned long long *value,
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int scale, unsigned long long max)
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ATTRIBUTE_NONNULL(4) ATTRIBUTE_RETURN_CHECK;
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bool vshCommandOptBool(const vshCmd *cmd, const char *name);
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bool vshCommandRun(vshControl *ctl, const vshCmd *cmd);
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bool vshCommandStringParse(vshControl *ctl, char *cmdstr);
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const vshCmdOpt *vshCommandOptArgv(vshControl *ctl, const vshCmd *cmd,
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const vshCmdOpt *opt);
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bool vshCommandArgvParse(vshControl *ctl, int nargs, char **argv);
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int vshCommandOptTimeoutToMs(vshControl *ctl, const vshCmd *cmd, int *timeout);
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void vshPrint(vshControl *ctl, const char *format, ...)
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ATTRIBUTE_FMT_PRINTF(2, 3);
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void vshPrintExtra(vshControl *ctl, const char *format, ...)
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ATTRIBUTE_FMT_PRINTF(2, 3);
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bool vshInit(vshControl *ctl, const vshCmdGrp *groups, const vshCmdDef *set);
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bool vshInitReload(vshControl *ctl);
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void vshDeinit(vshControl *ctl);
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void vshDebug(vshControl *ctl, int level, const char *format, ...)
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ATTRIBUTE_FMT_PRINTF(3, 4);
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/* User visible sort, so we want locale-specific case comparison. */
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# define vshStrcasecmp(S1, S2) strcasecmp(S1, S2)
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int vshNameSorter(const void *a, const void *b);
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virTypedParameterPtr vshFindTypedParamByName(const char *name,
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virTypedParameterPtr list,
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int count);
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char *vshGetTypedParamValue(vshControl *ctl, virTypedParameterPtr item)
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ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
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double vshPrettyCapacity(unsigned long long val, const char **unit);
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int vshStringToArray(const char *str, char ***array);
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/* Given an index, return either the name of that device (non-NULL) or
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* of its parent (NULL if a root). */
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typedef const char * (*vshTreeLookup)(int devid, bool parent, void *opaque);
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int vshTreePrint(vshControl *ctl, vshTreeLookup lookup, void *opaque,
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int num_devices, int devid);
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/* error handling */
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extern virErrorPtr last_error;
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void vshErrorHandler(void *opaque, virErrorPtr error);
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void vshReportError(vshControl *ctl);
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void vshResetLibvirtError(void);
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void vshSaveLibvirtError(void);
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/* file handling */
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char *vshEditWriteToTempFile(vshControl *ctl, const char *doc);
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int vshEditFile(vshControl *ctl, const char *filename);
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char *vshEditReadBackFile(vshControl *ctl, const char *filename);
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int vshAskReedit(vshControl *ctl, const char *msg, bool relax_avail);
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/* terminal modifications */
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bool vshTTYIsInterruptCharacter(vshControl *ctl, const char chr);
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int vshTTYDisableInterrupt(vshControl *ctl);
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int vshTTYRestore(vshControl *ctl);
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int vshTTYMakeRaw(vshControl *ctl, bool report_errors);
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bool vshTTYAvailable(vshControl *ctl);
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/* waiting for events */
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enum {
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VSH_EVENT_INTERRUPT,
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VSH_EVENT_TIMEOUT,
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VSH_EVENT_DONE,
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};
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void vshEventCleanup(vshControl *ctl);
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void vshEventDone(vshControl *ctl);
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void vshEventLoop(void *opaque);
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int vshEventStart(vshControl *ctl, int timeout_ms);
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void vshEventTimeout(int timer, void *opaque);
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int vshEventWait(vshControl *ctl);
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/* generic commands */
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extern const vshCmdOptDef opts_help[];
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extern const vshCmdInfo info_help[];
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extern const vshCmdOptDef opts_cd[];
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extern const vshCmdInfo info_cd[];
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extern const vshCmdOptDef opts_echo[];
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extern const vshCmdInfo info_echo[];
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extern const vshCmdInfo info_pwd[];
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extern const vshCmdInfo info_quit[];
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bool cmdHelp(vshControl *ctl, const vshCmd *cmd);
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bool cmdCd(vshControl *ctl, const vshCmd *cmd);
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bool cmdEcho(vshControl *ctl, const vshCmd *cmd);
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bool cmdPwd(vshControl *ctl, const vshCmd *cmd);
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bool cmdQuit(vshControl *ctl, const vshCmd *cmd);
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# define VSH_CMD_CD \
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{ \
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.name = "cd", \
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.handler = cmdCd, \
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.opts = opts_cd, \
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.info = info_cd, \
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.flags = VSH_CMD_FLAG_NOCONNECT \
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}
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# define VSH_CMD_ECHO \
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{ \
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.name = "echo", \
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.handler = cmdEcho, \
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.opts = opts_echo, \
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.info = info_echo, \
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.flags = VSH_CMD_FLAG_NOCONNECT \
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}
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# define VSH_CMD_EXIT \
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{ \
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.name = "exit", \
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.handler = cmdQuit, \
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.opts = NULL, \
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.info = info_quit, \
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.flags = VSH_CMD_FLAG_NOCONNECT \
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}
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# define VSH_CMD_HELP \
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{ \
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.name = "help", \
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.handler = cmdHelp, \
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.opts = opts_help, \
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.info = info_help, \
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.flags = VSH_CMD_FLAG_NOCONNECT \
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}
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# define VSH_CMD_PWD \
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{ \
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.name = "pwd", \
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.handler = cmdPwd, \
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.opts = NULL, \
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.info = info_pwd, \
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.flags = VSH_CMD_FLAG_NOCONNECT \
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}
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# define VSH_CMD_QUIT \
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{ \
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.name = "quit", \
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.handler = cmdQuit, \
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.opts = NULL, \
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.info = info_quit, \
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.flags = VSH_CMD_FLAG_NOCONNECT \
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}
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/* readline */
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char * vshReadline(vshControl *ctl, const char *prompt);
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/* allocation wrappers */
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void *_vshMalloc(vshControl *ctl, size_t sz, const char *filename, int line);
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# define vshMalloc(_ctl, _sz) _vshMalloc(_ctl, _sz, __FILE__, __LINE__)
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void *_vshCalloc(vshControl *ctl, size_t nmemb, size_t sz,
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const char *filename, int line);
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# define vshCalloc(_ctl, _nmemb, _sz) \
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_vshCalloc(_ctl, _nmemb, _sz, __FILE__, __LINE__)
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char *_vshStrdup(vshControl *ctl, const char *s, const char *filename,
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int line);
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# define vshStrdup(_ctl, _s) _vshStrdup(_ctl, _s, __FILE__, __LINE__)
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/* Poison the raw allocating identifiers in favor of our vsh variants. */
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# undef malloc
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# undef calloc
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# undef realloc
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# undef strdup
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# define malloc use_vshMalloc_instead_of_malloc
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# define calloc use_vshCalloc_instead_of_calloc
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# define realloc use_vshRealloc_instead_of_realloc
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# define strdup use_vshStrdup_instead_of_strdup
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/* Macros to help dealing with mutually exclusive options. */
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/* VSH_EXCLUSIVE_OPTIONS_EXPR:
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*
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* @NAME1: String containing the name of the option.
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* @EXPR1: Expression to validate the variable (boolean variable)
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|
* @NAME2: String containing the name of the option.
|
|
* @EXPR2: Expression to validate the variable (boolean variable)
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|
*
|
|
* Reject mutually exclusive command options in virsh. Use the
|
|
* provided expression to check the variables.
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|
*
|
|
* This helper does an early return and therefore it has to be called
|
|
* before anything that would require cleanup.
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|
*/
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# define VSH_EXCLUSIVE_OPTIONS_EXPR(NAME1, EXPR1, NAME2, EXPR2) \
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|
if ((EXPR1) && (EXPR2)) { \
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vshError(ctl, _("Options --%s and --%s are mutually exclusive"), \
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|
NAME1, NAME2); \
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|
return false; \
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|
}
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|
|
|
/* VSH_EXCLUSIVE_OPTIONS:
|
|
*
|
|
* @NAME1: String containing the name of the option.
|
|
* @NAME2: String containing the name of the option.
|
|
*
|
|
* Reject mutually exclusive command options in virsh. Use the
|
|
* vshCommandOptBool call to request them.
|
|
*
|
|
* This helper does an early return and therefore it has to be called
|
|
* before anything that would require cleanup.
|
|
*/
|
|
# define VSH_EXCLUSIVE_OPTIONS(NAME1, NAME2) \
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|
VSH_EXCLUSIVE_OPTIONS_EXPR(NAME1, vshCommandOptBool(cmd, NAME1), \
|
|
NAME2, vshCommandOptBool(cmd, NAME2))
|
|
|
|
/* VSH_EXCLUSIVE_OPTIONS_VAR:
|
|
*
|
|
* @VARNAME1: Boolean variable containing the value of the option of same name
|
|
* @VARNAME2: Boolean variable containing the value of the option of same name
|
|
*
|
|
* Reject mutually exclusive command options in virsh. Check in variables that
|
|
* contain the value and have same name as the option.
|
|
*
|
|
* This helper does an early return and therefore it has to be called
|
|
* before anything that would require cleanup.
|
|
*/
|
|
# define VSH_EXCLUSIVE_OPTIONS_VAR(VARNAME1, VARNAME2) \
|
|
VSH_EXCLUSIVE_OPTIONS_EXPR(#VARNAME1, VARNAME1, #VARNAME2, VARNAME2)
|
|
|
|
/* Macros to help dealing with required options. */
|
|
|
|
/* VSH_REQUIRE_OPTION_EXPR:
|
|
*
|
|
* @NAME1: String containing the name of the option.
|
|
* @EXPR1: Expression to validate the variable (boolean variable).
|
|
* @NAME2: String containing the name of required option.
|
|
* @EXPR2: Expression to validate the variable (boolean variable).
|
|
*
|
|
* Check if required command options in virsh was set. Use the
|
|
* provided expression to check the variables.
|
|
*
|
|
* This helper does an early return and therefore it has to be called
|
|
* before anything that would require cleanup.
|
|
*/
|
|
# define VSH_REQUIRE_OPTION_EXPR(NAME1, EXPR1, NAME2, EXPR2) \
|
|
do { \
|
|
if ((EXPR1) && !(EXPR2)) { \
|
|
vshError(ctl, _("Option --%s is required by option --%s"), \
|
|
NAME2, NAME1); \
|
|
return false; \
|
|
} \
|
|
} while (0)
|
|
|
|
/* VSH_REQUIRE_OPTION:
|
|
*
|
|
* @NAME1: String containing the name of the option.
|
|
* @NAME2: String containing the name of required option.
|
|
*
|
|
* Check if required command options in virsh was set. Use the
|
|
* vshCommandOptBool call to request them.
|
|
*
|
|
* This helper does an early return and therefore it has to be called
|
|
* before anything that would require cleanup.
|
|
*/
|
|
# define VSH_REQUIRE_OPTION(NAME1, NAME2) \
|
|
VSH_REQUIRE_OPTION_EXPR(NAME1, vshCommandOptBool(cmd, NAME1), \
|
|
NAME2, vshCommandOptBool(cmd, NAME2))
|
|
|
|
/* VSH_REQUIRE_OPTION_VAR:
|
|
*
|
|
* @VARNAME1: Boolean variable containing the value of the option of same name.
|
|
* @VARNAME2: Boolean variable containing the value of required option of
|
|
* same name.
|
|
*
|
|
* Check if required command options in virsh was set. Check in variables
|
|
* that contain the value and have same name as the option.
|
|
*
|
|
* This helper does an early return and therefore it has to be called
|
|
* before anything that would require cleanup.
|
|
*/
|
|
# define VSH_REQUIRE_OPTION_VAR(VARNAME1, VARNAME2) \
|
|
VSH_REQUIRE_OPTION_EXPR(#VARNAME1, VARNAME1, #VARNAME2, VARNAME2)
|
|
|
|
#endif /* VSH_H */
|